Vendor things

third-party/vendor/toml_edit/src/array.rs

@@ -0,0 +1,403 @@
+use std::iter::FromIterator;
+use std::mem;
+
+use crate::repr::Decor;
+use crate::value::{DEFAULT_LEADING_VALUE_DECOR, DEFAULT_VALUE_DECOR};
+use crate::{Item, RawString, Value};
+
+/// Type representing a TOML array,
+/// payload of the `Value::Array` variant's value
+#[derive(Debug, Default, Clone)]
+pub struct Array {
+    // `trailing` represents whitespaces, newlines
+    // and comments in an empty array or after the trailing comma
+    trailing: RawString,
+    trailing_comma: bool,
+    // prefix before `[` and suffix after `]`
+    decor: Decor,
+    pub(crate) span: Option<std::ops::Range<usize>>,
+    // always Vec<Item::Value>
+    pub(crate) values: Vec<Item>,
+}
+
+/// An owned iterator type over `Table`'s key/value pairs.
+pub type ArrayIntoIter = Box<dyn Iterator<Item = Value>>;
+/// An iterator type over `Array`'s values.
+pub type ArrayIter<'a> = Box<dyn Iterator<Item = &'a Value> + 'a>;
+/// An iterator type over `Array`'s values.
+pub type ArrayIterMut<'a> = Box<dyn Iterator<Item = &'a mut Value> + 'a>;
+
+/// Constructors
+///
+/// See also `FromIterator`
+impl Array {
+    /// Create an empty `Array`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// ```
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    pub(crate) fn with_vec(values: Vec<Item>) -> Self {
+        Self {
+            values,
+            ..Default::default()
+        }
+    }
+}
+
+/// Formatting
+impl Array {
+    /// Auto formats the array.
+    pub fn fmt(&mut self) {
+        decorate_array(self);
+    }
+
+    /// Set whether the array will use a trailing comma
+    pub fn set_trailing_comma(&mut self, yes: bool) {
+        self.trailing_comma = yes;
+    }
+
+    /// Whether the array will use a trailing comma
+    pub fn trailing_comma(&self) -> bool {
+        self.trailing_comma
+    }
+
+    /// Set whitespace after last element
+    pub fn set_trailing(&mut self, trailing: impl Into<RawString>) {
+        self.trailing = trailing.into();
+    }
+
+    /// Whitespace after last element
+    pub fn trailing(&self) -> &RawString {
+        &self.trailing
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        &mut self.decor
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor(&self) -> &Decor {
+        &self.decor
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.span.clone()
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.span = None;
+        self.decor.despan(input);
+        self.trailing.despan(input);
+        for value in &mut self.values {
+            value.despan(input);
+        }
+    }
+}
+
+impl Array {
+    /// Returns an iterator over all values.
+    pub fn iter(&self) -> ArrayIter<'_> {
+        Box::new(self.values.iter().filter_map(Item::as_value))
+    }
+
+    /// Returns an iterator over all values.
+    pub fn iter_mut(&mut self) -> ArrayIterMut<'_> {
+        Box::new(self.values.iter_mut().filter_map(Item::as_value_mut))
+    }
+
+    /// Returns the length of the underlying Vec.
+    ///
+    /// In some rare cases, placeholder elements will exist.  For a more accurate count, call
+    /// `a.iter().count()`
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    /// assert_eq!(arr.len(), 2);
+    /// ```
+    pub fn len(&self) -> usize {
+        self.values.len()
+    }
+
+    /// Return true iff `self.len() == 0`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// assert!(arr.is_empty());
+    ///
+    /// arr.push(1);
+    /// arr.push("foo");
+    /// assert!(! arr.is_empty());
+    /// ```
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    /// Clears the array, removing all values. Keeps the allocated memory for reuse.
+    pub fn clear(&mut self) {
+        self.values.clear()
+    }
+
+    /// Returns a reference to the value at the given index, or `None` if the index is out of
+    /// bounds.
+    pub fn get(&self, index: usize) -> Option<&Value> {
+        self.values.get(index).and_then(Item::as_value)
+    }
+
+    /// Returns a reference to the value at the given index, or `None` if the index is out of
+    /// bounds.
+    pub fn get_mut(&mut self, index: usize) -> Option<&mut Value> {
+        self.values.get_mut(index).and_then(Item::as_value_mut)
+    }
+
+    /// Appends a new value to the end of the array, applying default formatting to it.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    /// ```
+    pub fn push<V: Into<Value>>(&mut self, v: V) {
+        self.value_op(v.into(), true, |items, value| {
+            items.push(Item::Value(value))
+        })
+    }
+
+    /// Appends a new, already formatted value to the end of the array.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let formatted_value = "'literal'".parse::<toml_edit::Value>().unwrap();
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push_formatted(formatted_value);
+    /// ```
+    pub fn push_formatted(&mut self, v: Value) {
+        self.values.push(Item::Value(v));
+    }
+
+    /// Inserts an element at the given position within the array, applying default formatting to
+    /// it and shifting all values after it to the right.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `index > len`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    ///
+    /// arr.insert(0, "start");
+    /// ```
+    pub fn insert<V: Into<Value>>(&mut self, index: usize, v: V) {
+        self.value_op(v.into(), true, |items, value| {
+            items.insert(index, Item::Value(value))
+        })
+    }
+
+    /// Inserts an already formatted value at the given position within the array, shifting all
+    /// values after it to the right.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `index > len`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    ///
+    /// let formatted_value = "'start'".parse::<toml_edit::Value>().unwrap();
+    /// arr.insert_formatted(0, formatted_value);
+    /// ```
+    pub fn insert_formatted(&mut self, index: usize, v: Value) {
+        self.values.insert(index, Item::Value(v))
+    }
+
+    /// Replaces the element at the given position within the array, preserving existing formatting.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `index >= len`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    ///
+    /// arr.replace(0, "start");
+    /// ```
+    pub fn replace<V: Into<Value>>(&mut self, index: usize, v: V) -> Value {
+        // Read the existing value's decor and preserve it.
+        let existing_decor = self
+            .get(index)
+            .unwrap_or_else(|| panic!("index {} out of bounds (len = {})", index, self.len()))
+            .decor();
+        let mut value = v.into();
+        *value.decor_mut() = existing_decor.clone();
+        self.replace_formatted(index, value)
+    }
+
+    /// Replaces the element at the given position within the array with an already formatted value.
+    ///
+    /// # Panics
+    ///
+    /// Panics if `index >= len`.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    ///
+    /// let formatted_value = "'start'".parse::<toml_edit::Value>().unwrap();
+    /// arr.replace_formatted(0, formatted_value);
+    /// ```
+    pub fn replace_formatted(&mut self, index: usize, v: Value) -> Value {
+        match mem::replace(&mut self.values[index], Item::Value(v)) {
+            Item::Value(old_value) => old_value,
+            x => panic!("non-value item {:?} in an array", x),
+        }
+    }
+
+    /// Removes the value at the given index.
+    ///
+    /// # Examples
+    ///
+    /// ```rust
+    /// let mut arr = toml_edit::Array::new();
+    /// arr.push(1);
+    /// arr.push("foo");
+    ///
+    /// arr.remove(0);
+    /// assert_eq!(arr.len(), 1);
+    /// ```
+    pub fn remove(&mut self, index: usize) -> Value {
+        let removed = self.values.remove(index);
+        match removed {
+            Item::Value(v) => v,
+            x => panic!("non-value item {:?} in an array", x),
+        }
+    }
+
+    /// Retains only the values specified by the `keep` predicate.
+    ///
+    /// In other words, remove all values for which `keep(&value)` returns `false`.
+    ///
+    /// This method operates in place, visiting each element exactly once in the
+    /// original order, and preserves the order of the retained elements.
+    pub fn retain<F>(&mut self, mut keep: F)
+    where
+        F: FnMut(&Value) -> bool,
+    {
+        self.values
+            .retain(|item| item.as_value().map(&mut keep).unwrap_or(false));
+    }
+
+    fn value_op<T>(
+        &mut self,
+        v: Value,
+        decorate: bool,
+        op: impl FnOnce(&mut Vec<Item>, Value) -> T,
+    ) -> T {
+        let mut value = v;
+        if !self.is_empty() && decorate {
+            value.decorate(" ", "");
+        } else if decorate {
+            value.decorate("", "");
+        }
+        op(&mut self.values, value)
+    }
+}
+
+impl std::fmt::Display for Array {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        crate::encode::Encode::encode(self, f, None, ("", ""))
+    }
+}
+
+impl<V: Into<Value>> Extend<V> for Array {
+    fn extend<T: IntoIterator<Item = V>>(&mut self, iter: T) {
+        for value in iter {
+            self.push_formatted(value.into());
+        }
+    }
+}
+
+impl<V: Into<Value>> FromIterator<V> for Array {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = V>,
+    {
+        let v = iter.into_iter().map(|a| Item::Value(a.into()));
+        Array {
+            values: v.collect(),
+            ..Default::default()
+        }
+    }
+}
+
+impl IntoIterator for Array {
+    type Item = Value;
+    type IntoIter = ArrayIntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        Box::new(
+            self.values
+                .into_iter()
+                .filter(|v| v.is_value())
+                .map(|v| v.into_value().unwrap()),
+        )
+    }
+}
+
+impl<'s> IntoIterator for &'s Array {
+    type Item = &'s Value;
+    type IntoIter = ArrayIter<'s>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+fn decorate_array(array: &mut Array) {
+    for (i, value) in array
+        .values
+        .iter_mut()
+        .filter_map(Item::as_value_mut)
+        .enumerate()
+    {
+        // [value1, value2, value3]
+        if i == 0 {
+            value.decorate(DEFAULT_LEADING_VALUE_DECOR.0, DEFAULT_LEADING_VALUE_DECOR.1);
+        } else {
+            value.decorate(DEFAULT_VALUE_DECOR.0, DEFAULT_VALUE_DECOR.1);
+        }
+    }
+    // Since everything is now on the same line, remove trailing commas and whitespace.
+    array.set_trailing_comma(false);
+    array.set_trailing("");
+}

third-party/vendor/toml_edit/src/array_of_tables.rs

@@ -0,0 +1,166 @@
+use std::iter::FromIterator;
+
+use crate::{Array, Item, Table};
+
+/// Type representing a TOML array of tables
+#[derive(Clone, Debug, Default)]
+pub struct ArrayOfTables {
+    // Always Vec<Item::Table>, just `Item` to make `Index` work
+    pub(crate) span: Option<std::ops::Range<usize>>,
+    pub(crate) values: Vec<Item>,
+}
+
+/// Constructors
+///
+/// See also `FromIterator`
+impl ArrayOfTables {
+    /// Creates an empty array of tables.
+    pub fn new() -> Self {
+        Default::default()
+    }
+}
+
+/// Formatting
+impl ArrayOfTables {
+    /// Convert to an inline array
+    pub fn into_array(mut self) -> Array {
+        for value in self.values.iter_mut() {
+            value.make_value();
+        }
+        let mut a = Array::with_vec(self.values);
+        a.fmt();
+        a
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.span.clone()
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.span = None;
+        for value in &mut self.values {
+            value.despan(input);
+        }
+    }
+}
+
+impl ArrayOfTables {
+    /// Returns an iterator over tables.
+    pub fn iter(&self) -> ArrayOfTablesIter<'_> {
+        Box::new(self.values.iter().filter_map(Item::as_table))
+    }
+
+    /// Returns an iterator over tables.
+    pub fn iter_mut(&mut self) -> ArrayOfTablesIterMut<'_> {
+        Box::new(self.values.iter_mut().filter_map(Item::as_table_mut))
+    }
+
+    /// Returns the length of the underlying Vec.
+    /// To get the actual number of items use `a.iter().count()`.
+    pub fn len(&self) -> usize {
+        self.values.len()
+    }
+
+    /// Returns true iff `self.len() == 0`.
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    /// Removes all the tables.
+    pub fn clear(&mut self) {
+        self.values.clear()
+    }
+
+    /// Returns an optional reference to the table.
+    pub fn get(&self, index: usize) -> Option<&Table> {
+        self.values.get(index).and_then(Item::as_table)
+    }
+
+    /// Returns an optional mutable reference to the table.
+    pub fn get_mut(&mut self, index: usize) -> Option<&mut Table> {
+        self.values.get_mut(index).and_then(Item::as_table_mut)
+    }
+
+    /// Appends a table to the array.
+    pub fn push(&mut self, table: Table) {
+        self.values.push(Item::Table(table));
+    }
+
+    /// Removes a table with the given index.
+    pub fn remove(&mut self, index: usize) {
+        self.values.remove(index);
+    }
+
+    /// Retains only the elements specified by the `keep` predicate.
+    ///
+    /// In other words, remove all tables for which `keep(&table)` returns `false`.
+    ///
+    /// This method operates in place, visiting each element exactly once in the
+    /// original order, and preserves the order of the retained elements.
+    pub fn retain<F>(&mut self, mut keep: F)
+    where
+        F: FnMut(&Table) -> bool,
+    {
+        self.values
+            .retain(|item| item.as_table().map(&mut keep).unwrap_or(false));
+    }
+}
+
+/// An iterator type over `ArrayOfTables`'s values.
+pub type ArrayOfTablesIter<'a> = Box<dyn Iterator<Item = &'a Table> + 'a>;
+/// An iterator type over `ArrayOfTables`'s values.
+pub type ArrayOfTablesIterMut<'a> = Box<dyn Iterator<Item = &'a mut Table> + 'a>;
+/// An iterator type over `ArrayOfTables`'s values.
+pub type ArrayOfTablesIntoIter = Box<dyn Iterator<Item = Table>>;
+
+impl Extend<Table> for ArrayOfTables {
+    fn extend<T: IntoIterator<Item = Table>>(&mut self, iter: T) {
+        for value in iter {
+            self.push(value);
+        }
+    }
+}
+
+impl FromIterator<Table> for ArrayOfTables {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = Table>,
+    {
+        let v = iter.into_iter().map(Item::Table);
+        ArrayOfTables {
+            values: v.collect(),
+            span: None,
+        }
+    }
+}
+
+impl IntoIterator for ArrayOfTables {
+    type Item = Table;
+    type IntoIter = ArrayOfTablesIntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        Box::new(
+            self.values
+                .into_iter()
+                .filter(|v| v.is_table())
+                .map(|v| v.into_table().unwrap()),
+        )
+    }
+}
+
+impl<'s> IntoIterator for &'s ArrayOfTables {
+    type Item = &'s Table;
+    type IntoIter = ArrayOfTablesIter<'s>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+impl std::fmt::Display for ArrayOfTables {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        // HACK: Without the header, we don't really have a proper way of printing this
+        self.clone().into_array().fmt(f)
+    }
+}

third-party/vendor/toml_edit/src/de/array.rs

@@ -0,0 +1,97 @@
+use crate::de::Error;
+
+pub(crate) struct ArrayDeserializer {
+    input: Vec<crate::Item>,
+    span: Option<std::ops::Range<usize>>,
+}
+
+impl ArrayDeserializer {
+    pub(crate) fn new(input: Vec<crate::Item>, span: Option<std::ops::Range<usize>>) -> Self {
+        Self { input, span }
+    }
+}
+
+// Note: this is wrapped by `ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for ArrayDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_seq(ArraySeqAccess::new(self.input))
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map option unit newtype_struct
+        ignored_any unit_struct tuple_struct tuple enum identifier
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for ArrayDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl crate::Array {
+    pub(crate) fn into_deserializer(self) -> ArrayDeserializer {
+        ArrayDeserializer::new(self.values, self.span)
+    }
+}
+
+impl crate::ArrayOfTables {
+    pub(crate) fn into_deserializer(self) -> ArrayDeserializer {
+        ArrayDeserializer::new(self.values, self.span)
+    }
+}
+
+pub(crate) struct ArraySeqAccess {
+    iter: std::vec::IntoIter<crate::Item>,
+}
+
+impl ArraySeqAccess {
+    pub(crate) fn new(input: Vec<crate::Item>) -> Self {
+        Self {
+            iter: input.into_iter(),
+        }
+    }
+}
+
+impl<'de> serde::de::SeqAccess<'de> for ArraySeqAccess {
+    type Error = Error;
+
+    fn next_element_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        match self.iter.next() {
+            Some(v) => seed
+                .deserialize(crate::de::ValueDeserializer::new(v))
+                .map(Some),
+            None => Ok(None),
+        }
+    }
+}

third-party/vendor/toml_edit/src/de/datetime.rs

@@ -0,0 +1,43 @@
+use serde::de::value::BorrowedStrDeserializer;
+use serde::de::IntoDeserializer;
+
+use crate::de::Error;
+
+pub(crate) struct DatetimeDeserializer {
+    date: Option<crate::Datetime>,
+}
+
+impl DatetimeDeserializer {
+    pub(crate) fn new(date: crate::Datetime) -> Self {
+        Self { date: Some(date) }
+    }
+}
+
+impl<'de> serde::de::MapAccess<'de> for DatetimeDeserializer {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        if self.date.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                toml_datetime::__unstable::FIELD,
+            ))
+            .map(Some)
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        if let Some(date) = self.date.take() {
+            seed.deserialize(date.to_string().into_deserializer())
+        } else {
+            panic!("next_value_seed called before next_key_seed")
+        }
+    }
+}

third-party/vendor/toml_edit/src/de/key.rs

@@ -0,0 +1,140 @@
+use serde::de::IntoDeserializer;
+
+use super::Error;
+
+pub(crate) struct KeyDeserializer {
+    span: Option<std::ops::Range<usize>>,
+    key: crate::InternalString,
+}
+
+impl KeyDeserializer {
+    pub(crate) fn new(key: crate::InternalString, span: Option<std::ops::Range<usize>>) -> Self {
+        KeyDeserializer { span, key }
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, Error> for KeyDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> serde::de::Deserializer<'de> for KeyDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        self.key.into_deserializer().deserialize_any(visitor)
+    }
+
+    fn deserialize_enum<V>(
+        self,
+        name: &str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let _ = name;
+        let _ = variants;
+        visitor.visit_enum(self)
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self.key.as_str(), span));
+            }
+        }
+        self.deserialize_any(visitor)
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map option unit newtype_struct
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl<'de> serde::de::EnumAccess<'de> for KeyDeserializer {
+    type Error = super::Error;
+    type Variant = UnitOnly<Self::Error>;
+
+    fn variant_seed<T>(self, seed: T) -> Result<(T::Value, Self::Variant), Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        seed.deserialize(self).map(unit_only)
+    }
+}
+
+pub(crate) struct UnitOnly<E> {
+    marker: std::marker::PhantomData<E>,
+}
+
+fn unit_only<T, E>(t: T) -> (T, UnitOnly<E>) {
+    (
+        t,
+        UnitOnly {
+            marker: std::marker::PhantomData,
+        },
+    )
+}
+
+impl<'de, E> serde::de::VariantAccess<'de> for UnitOnly<E>
+where
+    E: serde::de::Error,
+{
+    type Error = E;
+
+    fn unit_variant(self) -> Result<(), Self::Error> {
+        Ok(())
+    }
+
+    fn newtype_variant_seed<T>(self, _seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"newtype variant",
+        ))
+    }
+
+    fn tuple_variant<V>(self, _len: usize, _visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"tuple variant",
+        ))
+    }
+
+    fn struct_variant<V>(
+        self,
+        _fields: &'static [&'static str],
+        _visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        Err(serde::de::Error::invalid_type(
+            serde::de::Unexpected::UnitVariant,
+            &"struct variant",
+        ))
+    }
+}

third-party/vendor/toml_edit/src/de/mod.rs

@@ -0,0 +1,289 @@
+//! Deserializing TOML into Rust structures.
+//!
+//! This module contains all the Serde support for deserializing TOML documents into Rust structures.
+
+use serde::de::DeserializeOwned;
+
+mod array;
+mod datetime;
+mod key;
+mod spanned;
+mod table;
+mod table_enum;
+mod value;
+
+use array::ArrayDeserializer;
+use datetime::DatetimeDeserializer;
+use key::KeyDeserializer;
+use spanned::SpannedDeserializer;
+use table::TableMapAccess;
+use table_enum::TableEnumDeserializer;
+
+pub use value::ValueDeserializer;
+
+/// Errors that can occur when deserializing a type.
+#[derive(Debug, Clone, PartialEq, Eq)]
+pub struct Error {
+    inner: crate::TomlError,
+}
+
+impl Error {
+    pub(crate) fn custom<T>(msg: T, span: Option<std::ops::Range<usize>>) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error {
+            inner: crate::TomlError::custom(msg.to_string(), span),
+        }
+    }
+
+    /// Add key while unwinding
+    pub fn add_key(&mut self, key: String) {
+        self.inner.add_key(key)
+    }
+
+    /// What went wrong
+    pub fn message(&self) -> &str {
+        self.inner.message()
+    }
+
+    /// The start/end index into the original document where the error occurred
+    pub fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.inner.span()
+    }
+
+    pub(crate) fn set_span(&mut self, span: Option<std::ops::Range<usize>>) {
+        self.inner.set_span(span);
+    }
+}
+
+impl serde::de::Error for Error {
+    fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error::custom(msg, None)
+    }
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, f: &mut std::fmt::Formatter) -> std::fmt::Result {
+        self.inner.fmt(f)
+    }
+}
+
+impl From<crate::TomlError> for Error {
+    fn from(e: crate::TomlError) -> Error {
+        Self { inner: e }
+    }
+}
+
+impl From<Error> for crate::TomlError {
+    fn from(e: Error) -> crate::TomlError {
+        e.inner
+    }
+}
+
+impl std::error::Error for Error {}
+
+/// Convert a value into `T`.
+pub fn from_str<T>(s: &'_ str) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let de = s.parse::<Deserializer>()?;
+    T::deserialize(de)
+}
+
+/// Convert a value into `T`.
+pub fn from_slice<T>(s: &'_ [u8]) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let s = std::str::from_utf8(s).map_err(|e| Error::custom(e, None))?;
+    from_str(s)
+}
+
+/// Convert a document into `T`.
+pub fn from_document<T>(d: crate::Document) -> Result<T, Error>
+where
+    T: DeserializeOwned,
+{
+    let deserializer = Deserializer::new(d);
+    T::deserialize(deserializer)
+}
+
+/// Deserialization for TOML [documents][crate::Document].
+pub struct Deserializer {
+    input: crate::Document,
+}
+
+impl Deserializer {
+    /// Deserialization implementation for TOML.
+    pub fn new(input: crate::Document) -> Self {
+        Self { input }
+    }
+}
+
+impl std::str::FromStr for Deserializer {
+    type Err = Error;
+
+    /// Parses a document from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let d = crate::parser::parse_document(s).map_err(Error::from)?;
+        Ok(Self::new(d))
+    }
+}
+
+// Note: this is wrapped by `toml::de::Deserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for Deserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let original = self.input.original;
+        self.input
+            .root
+            .into_deserializer()
+            .deserialize_any(visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_original(original);
+                e
+            })
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let original = self.input.original;
+        self.input
+            .root
+            .into_deserializer()
+            .deserialize_option(visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_original(original);
+                e
+            })
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let original = self.input.original;
+        self.input
+            .root
+            .into_deserializer()
+            .deserialize_newtype_struct(name, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_original(original);
+                e
+            })
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let original = self.input.original;
+        self.input
+            .root
+            .into_deserializer()
+            .deserialize_struct(name, fields, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_original(original);
+                e
+            })
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        name: &'static str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let original = self.input.original;
+        self.input
+            .root
+            .into_deserializer()
+            .deserialize_enum(name, variants, visitor)
+            .map_err(|mut e: Self::Error| {
+                e.inner.set_original(original);
+                e
+            })
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for Deserializer {
+    type Deserializer = Deserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for crate::Document {
+    type Deserializer = Deserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        Deserializer::new(self)
+    }
+}
+
+pub(crate) fn validate_struct_keys(
+    table: &crate::table::KeyValuePairs,
+    fields: &'static [&'static str],
+) -> Result<(), Error> {
+    let extra_fields = table
+        .iter()
+        .filter_map(|(key, val)| {
+            if !fields.contains(&key.as_str()) {
+                Some(val.clone())
+            } else {
+                None
+            }
+        })
+        .collect::<Vec<_>>();
+
+    if extra_fields.is_empty() {
+        Ok(())
+    } else {
+        Err(Error::custom(
+            format!(
+                "unexpected keys in table: {}, available keys: {}",
+                extra_fields
+                    .iter()
+                    .map(|k| k.key.get())
+                    .collect::<Vec<_>>()
+                    .join(", "),
+                fields.join(", "),
+            ),
+            extra_fields[0].key.span(),
+        ))
+    }
+}

third-party/vendor/toml_edit/src/de/spanned.rs

@@ -0,0 +1,70 @@
+use serde::de::value::BorrowedStrDeserializer;
+use serde::de::IntoDeserializer as _;
+
+use super::Error;
+
+pub(crate) struct SpannedDeserializer<'de, T: serde::de::IntoDeserializer<'de, Error>> {
+    phantom_data: std::marker::PhantomData<&'de ()>,
+    start: Option<usize>,
+    end: Option<usize>,
+    value: Option<T>,
+}
+
+impl<'de, T> SpannedDeserializer<'de, T>
+where
+    T: serde::de::IntoDeserializer<'de, Error>,
+{
+    pub(crate) fn new(value: T, span: std::ops::Range<usize>) -> Self {
+        Self {
+            phantom_data: Default::default(),
+            start: Some(span.start),
+            end: Some(span.end),
+            value: Some(value),
+        }
+    }
+}
+
+impl<'de, T> serde::de::MapAccess<'de> for SpannedDeserializer<'de, T>
+where
+    T: serde::de::IntoDeserializer<'de, Error>,
+{
+    type Error = Error;
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        if self.start.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::START_FIELD,
+            ))
+            .map(Some)
+        } else if self.end.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::END_FIELD,
+            ))
+            .map(Some)
+        } else if self.value.is_some() {
+            seed.deserialize(BorrowedStrDeserializer::new(
+                serde_spanned::__unstable::VALUE_FIELD,
+            ))
+            .map(Some)
+        } else {
+            Ok(None)
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        if let Some(start) = self.start.take() {
+            seed.deserialize(start.into_deserializer())
+        } else if let Some(end) = self.end.take() {
+            seed.deserialize(end.into_deserializer())
+        } else if let Some(value) = self.value.take() {
+            seed.deserialize(value.into_deserializer())
+        } else {
+            panic!("next_value_seed called before next_key_seed")
+        }
+    }
+}

third-party/vendor/toml_edit/src/de/table.rs

@@ -0,0 +1,213 @@
+use serde::de::IntoDeserializer;
+
+use crate::de::Error;
+
+pub(crate) struct TableDeserializer {
+    span: Option<std::ops::Range<usize>>,
+    items: crate::table::KeyValuePairs,
+}
+
+// Note: this is wrapped by `Deserializer` and `ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for TableDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_map(crate::de::TableMapAccess::new(self))
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_some(self)
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        _name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        visitor.visit_newtype_struct(self)
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.span.clone() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        _name: &'static str,
+        _variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if self.items.is_empty() {
+            Err(crate::de::Error::custom(
+                "wanted exactly 1 element, found 0 elements",
+                self.span,
+            ))
+        } else if self.items.len() != 1 {
+            Err(crate::de::Error::custom(
+                "wanted exactly 1 element, more than 1 element",
+                self.span,
+            ))
+        } else {
+            visitor.visit_enum(crate::de::TableMapAccess::new(self))
+        }
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for TableDeserializer {
+    type Deserializer = TableDeserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl crate::Table {
+    pub(crate) fn into_deserializer(self) -> TableDeserializer {
+        TableDeserializer {
+            span: self.span(),
+            items: self.items,
+        }
+    }
+}
+
+impl crate::InlineTable {
+    pub(crate) fn into_deserializer(self) -> TableDeserializer {
+        TableDeserializer {
+            span: self.span(),
+            items: self.items,
+        }
+    }
+}
+
+pub(crate) struct TableMapAccess {
+    iter: indexmap::map::IntoIter<crate::InternalString, crate::table::TableKeyValue>,
+    span: Option<std::ops::Range<usize>>,
+    value: Option<(crate::InternalString, crate::Item)>,
+}
+
+impl TableMapAccess {
+    pub(crate) fn new(input: TableDeserializer) -> Self {
+        Self {
+            iter: input.items.into_iter(),
+            span: input.span,
+            value: None,
+        }
+    }
+}
+
+impl<'de> serde::de::MapAccess<'de> for TableMapAccess {
+    type Error = Error;
+
+    fn next_key_seed<K>(&mut self, seed: K) -> Result<Option<K::Value>, Self::Error>
+    where
+        K: serde::de::DeserializeSeed<'de>,
+    {
+        match self.iter.next() {
+            Some((k, v)) => {
+                let ret = seed
+                    .deserialize(super::KeyDeserializer::new(k, v.key.span()))
+                    .map(Some)
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(v.key.span());
+                        }
+                        e
+                    });
+                self.value = Some((v.key.into(), v.value));
+                ret
+            }
+            None => Ok(None),
+        }
+    }
+
+    fn next_value_seed<V>(&mut self, seed: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        match self.value.take() {
+            Some((k, v)) => {
+                let span = v.span();
+                seed.deserialize(crate::de::ValueDeserializer::new(v))
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(span);
+                        }
+                        e.add_key(k.as_str().to_owned());
+                        e
+                    })
+            }
+            None => {
+                panic!("no more values in next_value_seed, internal error in ValueDeserializer")
+            }
+        }
+    }
+}
+
+impl<'de> serde::de::EnumAccess<'de> for TableMapAccess {
+    type Error = Error;
+    type Variant = super::TableEnumDeserializer;
+
+    fn variant_seed<V>(mut self, seed: V) -> Result<(V::Value, Self::Variant), Self::Error>
+    where
+        V: serde::de::DeserializeSeed<'de>,
+    {
+        let (key, value) = match self.iter.next() {
+            Some(pair) => pair,
+            None => {
+                return Err(Error::custom(
+                    "expected table with exactly 1 entry, found empty table",
+                    self.span,
+                ));
+            }
+        };
+
+        let val = seed
+            .deserialize(key.into_deserializer())
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(value.key.span());
+                }
+                e
+            })?;
+
+        let variant = super::TableEnumDeserializer::new(value.value);
+
+        Ok((val, variant))
+    }
+}

third-party/vendor/toml_edit/src/de/table_enum.rs

@@ -0,0 +1,160 @@
+use crate::de::Error;
+
+/// Deserializes table values into enum variants.
+pub(crate) struct TableEnumDeserializer {
+    value: crate::Item,
+}
+
+impl TableEnumDeserializer {
+    pub(crate) fn new(value: crate::Item) -> Self {
+        TableEnumDeserializer { value }
+    }
+}
+
+impl<'de> serde::de::VariantAccess<'de> for TableEnumDeserializer {
+    type Error = Error;
+
+    fn unit_variant(self) -> Result<(), Self::Error> {
+        match self.value {
+            crate::Item::Table(values) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty table", values.span()))
+                }
+            }
+            crate::Item::Value(crate::Value::InlineTable(values)) => {
+                if values.is_empty() {
+                    Ok(())
+                } else {
+                    Err(Error::custom("expected empty table", values.span()))
+                }
+            }
+            e => Err(Error::custom(
+                format!("expected table, found {}", e.type_name()),
+                e.span(),
+            )),
+        }
+    }
+
+    fn newtype_variant_seed<T>(self, seed: T) -> Result<T::Value, Self::Error>
+    where
+        T: serde::de::DeserializeSeed<'de>,
+    {
+        seed.deserialize(super::ValueDeserializer::new(self.value))
+    }
+
+    fn tuple_variant<V>(self, len: usize, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        match self.value {
+            crate::Item::Table(values) => {
+                let values_span = values.span();
+                let tuple_values = values
+                    .items
+                    .into_iter()
+                    .enumerate()
+                    .map(
+                        |(index, (_, value))| match value.key.get().parse::<usize>() {
+                            Ok(key_index) if key_index == index => Ok(value.value),
+                            Ok(_) | Err(_) => Err(Error::custom(
+                                format!(
+                                    "expected table key `{}`, but was `{}`",
+                                    index,
+                                    value.key.get()
+                                ),
+                                value.key.span(),
+                            )),
+                        },
+                    )
+                    // Fold all values into a `Vec`, or return the first error.
+                    .fold(Ok(Vec::with_capacity(len)), |result, value_result| {
+                        result.and_then(move |mut tuple_values| match value_result {
+                            Ok(value) => {
+                                tuple_values.push(value);
+                                Ok(tuple_values)
+                            }
+                            // `Result<de::Value, Self::Error>` to `Result<Vec<_>, Self::Error>`
+                            Err(e) => Err(e),
+                        })
+                    })?;
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {}", len),
+                        values_span,
+                    ))
+                }
+            }
+            crate::Item::Value(crate::Value::InlineTable(values)) => {
+                let values_span = values.span();
+                let tuple_values = values
+                    .items
+                    .into_iter()
+                    .enumerate()
+                    .map(
+                        |(index, (_, value))| match value.key.get().parse::<usize>() {
+                            Ok(key_index) if key_index == index => Ok(value.value),
+                            Ok(_) | Err(_) => Err(Error::custom(
+                                format!(
+                                    "expected table key `{}`, but was `{}`",
+                                    index,
+                                    value.key.get()
+                                ),
+                                value.key.span(),
+                            )),
+                        },
+                    )
+                    // Fold all values into a `Vec`, or return the first error.
+                    .fold(Ok(Vec::with_capacity(len)), |result, value_result| {
+                        result.and_then(move |mut tuple_values| match value_result {
+                            Ok(value) => {
+                                tuple_values.push(value);
+                                Ok(tuple_values)
+                            }
+                            // `Result<de::Value, Self::Error>` to `Result<Vec<_>, Self::Error>`
+                            Err(e) => Err(e),
+                        })
+                    })?;
+
+                if tuple_values.len() == len {
+                    serde::de::Deserializer::deserialize_seq(
+                        super::ArrayDeserializer::new(tuple_values, values_span),
+                        visitor,
+                    )
+                } else {
+                    Err(Error::custom(
+                        format!("expected tuple with length {}", len),
+                        values_span,
+                    ))
+                }
+            }
+            e => Err(Error::custom(
+                format!("expected table, found {}", e.type_name()),
+                e.span(),
+            )),
+        }
+    }
+
+    fn struct_variant<V>(
+        self,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        serde::de::Deserializer::deserialize_struct(
+            super::ValueDeserializer::new(self.value).with_struct_key_validation(),
+            "", // TODO: this should be the variant name
+            fields,
+            visitor,
+        )
+    }
+}

third-party/vendor/toml_edit/src/de/value.rs

@@ -0,0 +1,252 @@
+use serde::de::IntoDeserializer as _;
+
+use crate::de::DatetimeDeserializer;
+use crate::de::Error;
+
+/// Deserialization implementation for TOML [values][crate::Value].
+///
+/// Can be created either directly from TOML strings, using [`std::str::FromStr`],
+/// or from parsed [values][crate::Value] using [`serde::de::IntoDeserializer::into_deserializer`].
+///
+/// # Example
+///
+/// ```
+/// use serde::Deserialize;
+///
+/// #[derive(Deserialize)]
+/// struct Config {
+///     title: String,
+///     owner: Owner,
+/// }
+///
+/// #[derive(Deserialize)]
+/// struct Owner {
+///     name: String,
+/// }
+///
+/// let value = r#"{ title = 'TOML Example', owner = { name = 'Lisa' } }"#;
+/// let deserializer = value.parse::<toml_edit::de::ValueDeserializer>().unwrap();
+/// let config = Config::deserialize(deserializer).unwrap();
+/// assert_eq!(config.title, "TOML Example");
+/// assert_eq!(config.owner.name, "Lisa");
+/// ```
+pub struct ValueDeserializer {
+    input: crate::Item,
+    validate_struct_keys: bool,
+}
+
+impl ValueDeserializer {
+    pub(crate) fn new(input: crate::Item) -> Self {
+        Self {
+            input,
+            validate_struct_keys: false,
+        }
+    }
+
+    pub(crate) fn with_struct_key_validation(mut self) -> Self {
+        self.validate_struct_keys = true;
+        self
+    }
+}
+
+// Note: this is wrapped by `toml::de::ValueDeserializer` and any trait methods
+// implemented here need to be wrapped there
+impl<'de> serde::Deserializer<'de> for ValueDeserializer {
+    type Error = Error;
+
+    fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        match self.input {
+            crate::Item::None => visitor.visit_none(),
+            crate::Item::Value(crate::Value::String(v)) => visitor.visit_string(v.into_value()),
+            crate::Item::Value(crate::Value::Integer(v)) => visitor.visit_i64(v.into_value()),
+            crate::Item::Value(crate::Value::Float(v)) => visitor.visit_f64(v.into_value()),
+            crate::Item::Value(crate::Value::Boolean(v)) => visitor.visit_bool(v.into_value()),
+            crate::Item::Value(crate::Value::Datetime(v)) => {
+                visitor.visit_map(DatetimeDeserializer::new(v.into_value()))
+            }
+            crate::Item::Value(crate::Value::Array(v)) => {
+                v.into_deserializer().deserialize_any(visitor)
+            }
+            crate::Item::Value(crate::Value::InlineTable(v)) => {
+                v.into_deserializer().deserialize_any(visitor)
+            }
+            crate::Item::Table(v) => v.into_deserializer().deserialize_any(visitor),
+            crate::Item::ArrayOfTables(v) => v.into_deserializer().deserialize_any(visitor),
+        }
+        .map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    // `None` is interpreted as a missing field so be sure to implement `Some`
+    // as a present field.
+    fn deserialize_option<V>(self, visitor: V) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        visitor.visit_some(self).map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    fn deserialize_newtype_struct<V>(
+        self,
+        _name: &'static str,
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        visitor
+            .visit_newtype_struct(self)
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(span);
+                }
+                e
+            })
+    }
+
+    fn deserialize_struct<V>(
+        self,
+        name: &'static str,
+        fields: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        if serde_spanned::__unstable::is_spanned(name, fields) {
+            if let Some(span) = self.input.span() {
+                return visitor.visit_map(super::SpannedDeserializer::new(self, span));
+            }
+        }
+
+        if name == toml_datetime::__unstable::NAME && fields == [toml_datetime::__unstable::FIELD] {
+            let span = self.input.span();
+            if let crate::Item::Value(crate::Value::Datetime(d)) = self.input {
+                return visitor
+                    .visit_map(DatetimeDeserializer::new(d.into_value()))
+                    .map_err(|mut e: Self::Error| {
+                        if e.span().is_none() {
+                            e.set_span(span);
+                        }
+                        e
+                    });
+            }
+        }
+
+        if self.validate_struct_keys {
+            let span = self.input.span();
+            match &self.input {
+                crate::Item::Table(values) => super::validate_struct_keys(&values.items, fields),
+                crate::Item::Value(crate::Value::InlineTable(values)) => {
+                    super::validate_struct_keys(&values.items, fields)
+                }
+                _ => Ok(()),
+            }
+            .map_err(|mut e: Self::Error| {
+                if e.span().is_none() {
+                    e.set_span(span);
+                }
+                e
+            })?
+        }
+
+        self.deserialize_any(visitor)
+    }
+
+    // Called when the type to deserialize is an enum, as opposed to a field in the type.
+    fn deserialize_enum<V>(
+        self,
+        name: &'static str,
+        variants: &'static [&'static str],
+        visitor: V,
+    ) -> Result<V::Value, Error>
+    where
+        V: serde::de::Visitor<'de>,
+    {
+        let span = self.input.span();
+        match self.input {
+            crate::Item::Value(crate::Value::String(v)) => {
+                visitor.visit_enum(v.into_value().into_deserializer())
+            }
+            crate::Item::Value(crate::Value::InlineTable(v)) => {
+                if v.is_empty() {
+                    Err(crate::de::Error::custom(
+                        "wanted exactly 1 element, found 0 elements",
+                        v.span(),
+                    ))
+                } else if v.len() != 1 {
+                    Err(crate::de::Error::custom(
+                        "wanted exactly 1 element, more than 1 element",
+                        v.span(),
+                    ))
+                } else {
+                    v.into_deserializer()
+                        .deserialize_enum(name, variants, visitor)
+                }
+            }
+            crate::Item::Table(v) => v
+                .into_deserializer()
+                .deserialize_enum(name, variants, visitor),
+            e => Err(crate::de::Error::custom("wanted string or table", e.span())),
+        }
+        .map_err(|mut e: Self::Error| {
+            if e.span().is_none() {
+                e.set_span(span);
+            }
+            e
+        })
+    }
+
+    serde::forward_to_deserialize_any! {
+        bool u8 u16 u32 u64 i8 i16 i32 i64 f32 f64 char str string seq
+        bytes byte_buf map unit
+        ignored_any unit_struct tuple_struct tuple identifier
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for ValueDeserializer {
+    type Deserializer = Self;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        self
+    }
+}
+
+impl<'de> serde::de::IntoDeserializer<'de, crate::de::Error> for crate::Value {
+    type Deserializer = ValueDeserializer;
+
+    fn into_deserializer(self) -> Self::Deserializer {
+        ValueDeserializer::new(crate::Item::Value(self))
+    }
+}
+
+impl crate::Item {
+    pub(crate) fn into_deserializer(self) -> ValueDeserializer {
+        ValueDeserializer::new(self)
+    }
+}
+
+impl std::str::FromStr for ValueDeserializer {
+    type Err = Error;
+
+    /// Parses a value from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let v = crate::parser::parse_value(s).map_err(Error::from)?;
+        Ok(v.into_deserializer())
+    }
+}

third-party/vendor/toml_edit/src/document.rs

@@ -0,0 +1,113 @@
+use std::str::FromStr;
+
+use crate::parser;
+use crate::table::Iter;
+use crate::{Item, RawString, Table};
+
+/// Type representing a TOML document
+#[derive(Debug, Clone)]
+pub struct Document {
+    pub(crate) root: Item,
+    // Trailing comments and whitespaces
+    pub(crate) trailing: RawString,
+    pub(crate) original: Option<String>,
+    pub(crate) span: Option<std::ops::Range<usize>>,
+}
+
+impl Document {
+    /// Creates an empty document
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    /// Returns a reference to the root item.
+    pub fn as_item(&self) -> &Item {
+        &self.root
+    }
+
+    /// Returns a mutable reference to the root item.
+    pub fn as_item_mut(&mut self) -> &mut Item {
+        &mut self.root
+    }
+
+    /// Returns a reference to the root table.
+    pub fn as_table(&self) -> &Table {
+        self.root.as_table().expect("root should always be a table")
+    }
+
+    /// Returns a mutable reference to the root table.
+    pub fn as_table_mut(&mut self) -> &mut Table {
+        self.root
+            .as_table_mut()
+            .expect("root should always be a table")
+    }
+
+    /// Returns an iterator over the root table.
+    pub fn iter(&self) -> Iter<'_> {
+        self.as_table().iter()
+    }
+
+    /// Set whitespace after last element
+    pub fn set_trailing(&mut self, trailing: impl Into<RawString>) {
+        self.trailing = trailing.into();
+    }
+
+    /// Whitespace after last element
+    pub fn trailing(&self) -> &RawString {
+        &self.trailing
+    }
+
+    /// # Panics
+    ///
+    /// If run on on a `Document` not generated by the parser
+    pub(crate) fn despan(&mut self) {
+        self.span = None;
+        self.root.despan(self.original.as_deref().unwrap());
+        self.trailing.despan(self.original.as_deref().unwrap());
+    }
+}
+
+impl Default for Document {
+    fn default() -> Self {
+        Self {
+            root: Item::Table(Table::with_pos(Some(0))),
+            trailing: Default::default(),
+            original: Default::default(),
+            span: Default::default(),
+        }
+    }
+}
+
+impl FromStr for Document {
+    type Err = crate::TomlError;
+
+    /// Parses a document from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let mut d = parser::parse_document(s)?;
+        d.despan();
+        Ok(d)
+    }
+}
+
+impl std::ops::Deref for Document {
+    type Target = Table;
+
+    fn deref(&self) -> &Self::Target {
+        self.as_table()
+    }
+}
+
+impl std::ops::DerefMut for Document {
+    fn deref_mut(&mut self) -> &mut Self::Target {
+        self.as_table_mut()
+    }
+}
+
+impl From<Table> for Document {
+    fn from(root: Table) -> Self {
+        Self {
+            root: Item::Table(root),
+            ..Default::default()
+        }
+    }
+}

third-party/vendor/toml_edit/src/encode.rs

@@ -0,0 +1,569 @@
+use std::borrow::Cow;
+use std::fmt::{Display, Formatter, Result, Write};
+
+use toml_datetime::*;
+
+use crate::document::Document;
+use crate::inline_table::DEFAULT_INLINE_KEY_DECOR;
+use crate::key::Key;
+use crate::repr::{Formatted, Repr, ValueRepr};
+use crate::table::{DEFAULT_KEY_DECOR, DEFAULT_KEY_PATH_DECOR, DEFAULT_TABLE_DECOR};
+use crate::value::{
+    DEFAULT_LEADING_VALUE_DECOR, DEFAULT_TRAILING_VALUE_DECOR, DEFAULT_VALUE_DECOR,
+};
+use crate::{Array, InlineTable, Item, Table, Value};
+
+pub(crate) trait Encode {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result;
+}
+
+impl Encode for Key {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        let decor = self.decor();
+        decor.prefix_encode(buf, input, default_decor.0)?;
+
+        if let Some(input) = input {
+            let repr = self
+                .as_repr()
+                .map(Cow::Borrowed)
+                .unwrap_or_else(|| Cow::Owned(self.default_repr()));
+            repr.encode(buf, input)?;
+        } else {
+            let repr = self.display_repr();
+            write!(buf, "{}", repr)?;
+        };
+
+        decor.suffix_encode(buf, input, default_decor.1)?;
+        Ok(())
+    }
+}
+
+impl<'k> Encode for &'k [Key] {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        for (i, key) in self.iter().enumerate() {
+            let first = i == 0;
+            let last = i + 1 == self.len();
+
+            let prefix = if first {
+                default_decor.0
+            } else {
+                DEFAULT_KEY_PATH_DECOR.0
+            };
+            let suffix = if last {
+                default_decor.1
+            } else {
+                DEFAULT_KEY_PATH_DECOR.1
+            };
+
+            if !first {
+                write!(buf, ".")?;
+            }
+            key.encode(buf, input, (prefix, suffix))?;
+        }
+        Ok(())
+    }
+}
+
+impl<'k> Encode for &'k [&'k Key] {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        for (i, key) in self.iter().enumerate() {
+            let first = i == 0;
+            let last = i + 1 == self.len();
+
+            let prefix = if first {
+                default_decor.0
+            } else {
+                DEFAULT_KEY_PATH_DECOR.0
+            };
+            let suffix = if last {
+                default_decor.1
+            } else {
+                DEFAULT_KEY_PATH_DECOR.1
+            };
+
+            if !first {
+                write!(buf, ".")?;
+            }
+            key.encode(buf, input, (prefix, suffix))?;
+        }
+        Ok(())
+    }
+}
+
+impl<T> Encode for Formatted<T>
+where
+    T: ValueRepr,
+{
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        let decor = self.decor();
+        decor.prefix_encode(buf, input, default_decor.0)?;
+
+        if let Some(input) = input {
+            let repr = self
+                .as_repr()
+                .map(Cow::Borrowed)
+                .unwrap_or_else(|| Cow::Owned(self.default_repr()));
+            repr.encode(buf, input)?;
+        } else {
+            let repr = self.display_repr();
+            write!(buf, "{}", repr)?;
+        };
+
+        decor.suffix_encode(buf, input, default_decor.1)?;
+        Ok(())
+    }
+}
+
+impl Encode for Array {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        let decor = self.decor();
+        decor.prefix_encode(buf, input, default_decor.0)?;
+        write!(buf, "[")?;
+
+        for (i, elem) in self.iter().enumerate() {
+            let inner_decor;
+            if i == 0 {
+                inner_decor = DEFAULT_LEADING_VALUE_DECOR;
+            } else {
+                inner_decor = DEFAULT_VALUE_DECOR;
+                write!(buf, ",")?;
+            }
+            elem.encode(buf, input, inner_decor)?;
+        }
+        if self.trailing_comma() && !self.is_empty() {
+            write!(buf, ",")?;
+        }
+
+        self.trailing().encode_with_default(buf, input, "")?;
+        write!(buf, "]")?;
+        decor.suffix_encode(buf, input, default_decor.1)?;
+
+        Ok(())
+    }
+}
+
+impl Encode for InlineTable {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        let decor = self.decor();
+        decor.prefix_encode(buf, input, default_decor.0)?;
+        write!(buf, "{{")?;
+        self.preamble().encode_with_default(buf, input, "")?;
+
+        let children = self.get_values();
+        let len = children.len();
+        for (i, (key_path, value)) in children.into_iter().enumerate() {
+            if i != 0 {
+                write!(buf, ",")?;
+            }
+            let inner_decor = if i == len - 1 {
+                DEFAULT_TRAILING_VALUE_DECOR
+            } else {
+                DEFAULT_VALUE_DECOR
+            };
+            key_path
+                .as_slice()
+                .encode(buf, input, DEFAULT_INLINE_KEY_DECOR)?;
+            write!(buf, "=")?;
+            value.encode(buf, input, inner_decor)?;
+        }
+
+        write!(buf, "}}")?;
+        decor.suffix_encode(buf, input, default_decor.1)?;
+
+        Ok(())
+    }
+}
+
+impl Encode for Value {
+    fn encode(
+        &self,
+        buf: &mut dyn Write,
+        input: Option<&str>,
+        default_decor: (&str, &str),
+    ) -> Result {
+        match self {
+            Value::String(repr) => repr.encode(buf, input, default_decor),
+            Value::Integer(repr) => repr.encode(buf, input, default_decor),
+            Value::Float(repr) => repr.encode(buf, input, default_decor),
+            Value::Boolean(repr) => repr.encode(buf, input, default_decor),
+            Value::Datetime(repr) => repr.encode(buf, input, default_decor),
+            Value::Array(array) => array.encode(buf, input, default_decor),
+            Value::InlineTable(table) => table.encode(buf, input, default_decor),
+        }
+    }
+}
+
+impl Display for Document {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        let mut path = Vec::new();
+        let mut last_position = 0;
+        let mut tables = Vec::new();
+        visit_nested_tables(self.as_table(), &mut path, false, &mut |t, p, is_array| {
+            if let Some(pos) = t.position() {
+                last_position = pos;
+            }
+            tables.push((last_position, t, p.clone(), is_array));
+            Ok(())
+        })
+        .unwrap();
+
+        tables.sort_by_key(|&(id, _, _, _)| id);
+        let mut first_table = true;
+        for (_, table, path, is_array) in tables {
+            visit_table(
+                f,
+                self.original.as_deref(),
+                table,
+                &path,
+                is_array,
+                &mut first_table,
+            )?;
+        }
+        self.trailing()
+            .encode_with_default(f, self.original.as_deref(), "")
+    }
+}
+
+fn visit_nested_tables<'t, F>(
+    table: &'t Table,
+    path: &mut Vec<Key>,
+    is_array_of_tables: bool,
+    callback: &mut F,
+) -> Result
+where
+    F: FnMut(&'t Table, &Vec<Key>, bool) -> Result,
+{
+    if !table.is_dotted() {
+        callback(table, path, is_array_of_tables)?;
+    }
+
+    for kv in table.items.values() {
+        match kv.value {
+            Item::Table(ref t) => {
+                let mut key = kv.key.clone();
+                if t.is_dotted() {
+                    // May have newlines and generally isn't written for standard tables
+                    key.decor_mut().clear();
+                }
+                path.push(key);
+                visit_nested_tables(t, path, false, callback)?;
+                path.pop();
+            }
+            Item::ArrayOfTables(ref a) => {
+                for t in a.iter() {
+                    let key = kv.key.clone();
+                    path.push(key);
+                    visit_nested_tables(t, path, true, callback)?;
+                    path.pop();
+                }
+            }
+            _ => {}
+        }
+    }
+    Ok(())
+}
+
+fn visit_table(
+    buf: &mut dyn Write,
+    input: Option<&str>,
+    table: &Table,
+    path: &[Key],
+    is_array_of_tables: bool,
+    first_table: &mut bool,
+) -> Result {
+    let children = table.get_values();
+    // We are intentionally hiding implicit tables without any tables nested under them (ie
+    // `table.is_empty()` which is in contrast to `table.get_values().is_empty()`).  We are
+    // trusting the user that an empty implicit table is not semantically meaningful
+    //
+    // This allows a user to delete all tables under this implicit table and the implicit table
+    // will disappear.
+    //
+    // However, this means that users need to take care in deciding what tables get marked as
+    // implicit.
+    let is_visible_std_table = !(table.implicit && children.is_empty());
+
+    if path.is_empty() {
+        // don't print header for the root node
+        if !children.is_empty() {
+            *first_table = false;
+        }
+    } else if is_array_of_tables {
+        let default_decor = if *first_table {
+            *first_table = false;
+            ("", DEFAULT_TABLE_DECOR.1)
+        } else {
+            DEFAULT_TABLE_DECOR
+        };
+        table.decor.prefix_encode(buf, input, default_decor.0)?;
+        write!(buf, "[[")?;
+        path.encode(buf, input, DEFAULT_KEY_PATH_DECOR)?;
+        write!(buf, "]]")?;
+        table.decor.suffix_encode(buf, input, default_decor.1)?;
+        writeln!(buf)?;
+    } else if is_visible_std_table {
+        let default_decor = if *first_table {
+            *first_table = false;
+            ("", DEFAULT_TABLE_DECOR.1)
+        } else {
+            DEFAULT_TABLE_DECOR
+        };
+        table.decor.prefix_encode(buf, input, default_decor.0)?;
+        write!(buf, "[")?;
+        path.encode(buf, input, DEFAULT_KEY_PATH_DECOR)?;
+        write!(buf, "]")?;
+        table.decor.suffix_encode(buf, input, default_decor.1)?;
+        writeln!(buf)?;
+    }
+    // print table body
+    for (key_path, value) in children {
+        key_path.as_slice().encode(buf, input, DEFAULT_KEY_DECOR)?;
+        write!(buf, "=")?;
+        value.encode(buf, input, DEFAULT_VALUE_DECOR)?;
+        writeln!(buf)?;
+    }
+    Ok(())
+}
+
+impl ValueRepr for String {
+    fn to_repr(&self) -> Repr {
+        to_string_repr(self, None, None)
+    }
+}
+
+pub(crate) fn to_string_repr(
+    value: &str,
+    style: Option<StringStyle>,
+    literal: Option<bool>,
+) -> Repr {
+    let (style, literal) = match (style, literal) {
+        (Some(style), Some(literal)) => (style, literal),
+        (_, Some(literal)) => (infer_style(value).0, literal),
+        (Some(style), _) => (style, infer_style(value).1),
+        (_, _) => infer_style(value),
+    };
+
+    let mut output = String::with_capacity(value.len() * 2);
+    if literal {
+        output.push_str(style.literal_start());
+        output.push_str(value);
+        output.push_str(style.literal_end());
+    } else {
+        output.push_str(style.standard_start());
+        for ch in value.chars() {
+            match ch {
+                '\u{8}' => output.push_str("\\b"),
+                '\u{9}' => output.push_str("\\t"),
+                '\u{a}' => match style {
+                    StringStyle::NewlineTriple => output.push('\n'),
+                    StringStyle::OnelineSingle => output.push_str("\\n"),
+                    _ => unreachable!(),
+                },
+                '\u{c}' => output.push_str("\\f"),
+                '\u{d}' => output.push_str("\\r"),
+                '\u{22}' => output.push_str("\\\""),
+                '\u{5c}' => output.push_str("\\\\"),
+                c if c <= '\u{1f}' || c == '\u{7f}' => {
+                    write!(output, "\\u{:04X}", ch as u32).unwrap();
+                }
+                ch => output.push(ch),
+            }
+        }
+        output.push_str(style.standard_end());
+    }
+
+    Repr::new_unchecked(output)
+}
+
+#[derive(Copy, Clone, Debug, PartialEq, Eq)]
+pub(crate) enum StringStyle {
+    NewlineTriple,
+    OnelineTriple,
+    OnelineSingle,
+}
+
+impl StringStyle {
+    fn literal_start(self) -> &'static str {
+        match self {
+            Self::NewlineTriple => "'''\n",
+            Self::OnelineTriple => "'''",
+            Self::OnelineSingle => "'",
+        }
+    }
+    fn literal_end(self) -> &'static str {
+        match self {
+            Self::NewlineTriple => "'''",
+            Self::OnelineTriple => "'''",
+            Self::OnelineSingle => "'",
+        }
+    }
+
+    fn standard_start(self) -> &'static str {
+        match self {
+            Self::NewlineTriple => "\"\"\"\n",
+            // note: OnelineTriple can happen if do_pretty wants to do
+            // '''it's one line'''
+            // but literal == false
+            Self::OnelineTriple | Self::OnelineSingle => "\"",
+        }
+    }
+
+    fn standard_end(self) -> &'static str {
+        match self {
+            Self::NewlineTriple => "\"\"\"",
+            // note: OnelineTriple can happen if do_pretty wants to do
+            // '''it's one line'''
+            // but literal == false
+            Self::OnelineTriple | Self::OnelineSingle => "\"",
+        }
+    }
+}
+
+fn infer_style(value: &str) -> (StringStyle, bool) {
+    // For doing pretty prints we store in a new String
+    // because there are too many cases where pretty cannot
+    // work. We need to determine:
+    // - if we are a "multi-line" pretty (if there are \n)
+    // - if ['''] appears if multi or ['] if single
+    // - if there are any invalid control characters
+    //
+    // Doing it any other way would require multiple passes
+    // to determine if a pretty string works or not.
+    let mut out = String::with_capacity(value.len() * 2);
+    let mut ty = StringStyle::OnelineSingle;
+    // found consecutive single quotes
+    let mut max_found_singles = 0;
+    let mut found_singles = 0;
+    let mut prefer_literal = false;
+    let mut can_be_pretty = true;
+
+    for ch in value.chars() {
+        if can_be_pretty {
+            if ch == '\'' {
+                found_singles += 1;
+                if found_singles >= 3 {
+                    can_be_pretty = false;
+                }
+            } else {
+                if found_singles > max_found_singles {
+                    max_found_singles = found_singles;
+                }
+                found_singles = 0
+            }
+            match ch {
+                '\t' => {}
+                '\\' => {
+                    prefer_literal = true;
+                }
+                '\n' => ty = StringStyle::NewlineTriple,
+                // Escape codes are needed if any ascii control
+                // characters are present, including \b \f \r.
+                c if c <= '\u{1f}' || c == '\u{7f}' => can_be_pretty = false,
+                _ => {}
+            }
+            out.push(ch);
+        } else {
+            // the string cannot be represented as pretty,
+            // still check if it should be multiline
+            if ch == '\n' {
+                ty = StringStyle::NewlineTriple;
+            }
+        }
+    }
+    if found_singles > 0 && value.ends_with('\'') {
+        // We cannot escape the ending quote so we must use """
+        can_be_pretty = false;
+    }
+    if !prefer_literal {
+        can_be_pretty = false;
+    }
+    if !can_be_pretty {
+        debug_assert!(ty != StringStyle::OnelineTriple);
+        return (ty, false);
+    }
+    if found_singles > max_found_singles {
+        max_found_singles = found_singles;
+    }
+    debug_assert!(max_found_singles < 3);
+    if ty == StringStyle::OnelineSingle && max_found_singles >= 1 {
+        // no newlines, but must use ''' because it has ' in it
+        ty = StringStyle::OnelineTriple;
+    }
+    (ty, true)
+}
+
+impl ValueRepr for i64 {
+    fn to_repr(&self) -> Repr {
+        Repr::new_unchecked(self.to_string())
+    }
+}
+
+impl ValueRepr for f64 {
+    fn to_repr(&self) -> Repr {
+        to_f64_repr(*self)
+    }
+}
+
+fn to_f64_repr(f: f64) -> Repr {
+    let repr = match (f.is_sign_negative(), f.is_nan(), f == 0.0) {
+        (true, true, _) => "-nan".to_owned(),
+        (false, true, _) => "nan".to_owned(),
+        (true, false, true) => "-0.0".to_owned(),
+        (false, false, true) => "0.0".to_owned(),
+        (_, false, false) => {
+            if f % 1.0 == 0.0 {
+                format!("{}.0", f)
+            } else {
+                format!("{}", f)
+            }
+        }
+    };
+    Repr::new_unchecked(repr)
+}
+
+impl ValueRepr for bool {
+    fn to_repr(&self) -> Repr {
+        Repr::new_unchecked(self.to_string())
+    }
+}
+
+impl ValueRepr for Datetime {
+    fn to_repr(&self) -> Repr {
+        Repr::new_unchecked(self.to_string())
+    }
+}

third-party/vendor/toml_edit/src/index.rs

@@ -0,0 +1,156 @@
+use std::ops;
+
+use crate::document::Document;
+use crate::key::Key;
+use crate::table::TableKeyValue;
+use crate::{value, InlineTable, InternalString, Item, Table, Value};
+
+// copied from
+// https://github.com/serde-rs/json/blob/master/src/value/index.rs
+
+pub trait Index: crate::private::Sealed {
+    #[doc(hidden)]
+    fn index<'v>(&self, val: &'v Item) -> Option<&'v Item>;
+    #[doc(hidden)]
+    fn index_mut<'v>(&self, val: &'v mut Item) -> Option<&'v mut Item>;
+}
+
+impl Index for usize {
+    fn index<'v>(&self, v: &'v Item) -> Option<&'v Item> {
+        match *v {
+            Item::ArrayOfTables(ref aot) => aot.values.get(*self),
+            Item::Value(ref a) if a.is_array() => a.as_array().and_then(|a| a.values.get(*self)),
+            _ => None,
+        }
+    }
+    fn index_mut<'v>(&self, v: &'v mut Item) -> Option<&'v mut Item> {
+        match *v {
+            Item::ArrayOfTables(ref mut vec) => vec.values.get_mut(*self),
+            Item::Value(ref mut a) => a.as_array_mut().and_then(|a| a.values.get_mut(*self)),
+            _ => None,
+        }
+    }
+}
+
+impl Index for str {
+    fn index<'v>(&self, v: &'v Item) -> Option<&'v Item> {
+        match *v {
+            Item::Table(ref t) => t.get(self),
+            Item::Value(ref v) => v
+                .as_inline_table()
+                .and_then(|t| t.items.get(self))
+                .and_then(|kv| {
+                    if !kv.value.is_none() {
+                        Some(&kv.value)
+                    } else {
+                        None
+                    }
+                }),
+            _ => None,
+        }
+    }
+    fn index_mut<'v>(&self, v: &'v mut Item) -> Option<&'v mut Item> {
+        if let Item::None = *v {
+            let mut t = InlineTable::default();
+            t.items.insert(
+                InternalString::from(self),
+                TableKeyValue::new(Key::new(self), Item::None),
+            );
+            *v = value(Value::InlineTable(t));
+        }
+        match *v {
+            Item::Table(ref mut t) => Some(t.entry(self).or_insert(Item::None)),
+            Item::Value(ref mut v) => v.as_inline_table_mut().map(|t| {
+                &mut t
+                    .items
+                    .entry(InternalString::from(self))
+                    .or_insert_with(|| TableKeyValue::new(Key::new(self), Item::None))
+                    .value
+            }),
+            _ => None,
+        }
+    }
+}
+
+impl Index for String {
+    fn index<'v>(&self, v: &'v Item) -> Option<&'v Item> {
+        self[..].index(v)
+    }
+    fn index_mut<'v>(&self, v: &'v mut Item) -> Option<&'v mut Item> {
+        self[..].index_mut(v)
+    }
+}
+
+impl<'a, T: ?Sized> Index for &'a T
+where
+    T: Index,
+{
+    fn index<'v>(&self, v: &'v Item) -> Option<&'v Item> {
+        (**self).index(v)
+    }
+    fn index_mut<'v>(&self, v: &'v mut Item) -> Option<&'v mut Item> {
+        (**self).index_mut(v)
+    }
+}
+
+impl<I> ops::Index<I> for Item
+where
+    I: Index,
+{
+    type Output = Item;
+
+    fn index(&self, index: I) -> &Item {
+        index.index(self).expect("index not found")
+    }
+}
+
+impl<I> ops::IndexMut<I> for Item
+where
+    I: Index,
+{
+    fn index_mut(&mut self, index: I) -> &mut Item {
+        index.index_mut(self).expect("index not found")
+    }
+}
+
+impl<'s> ops::Index<&'s str> for Table {
+    type Output = Item;
+
+    fn index(&self, key: &'s str) -> &Item {
+        self.get(key).expect("index not found")
+    }
+}
+
+impl<'s> ops::IndexMut<&'s str> for Table {
+    fn index_mut(&mut self, key: &'s str) -> &mut Item {
+        self.entry(key).or_insert(Item::None)
+    }
+}
+
+impl<'s> ops::Index<&'s str> for InlineTable {
+    type Output = Value;
+
+    fn index(&self, key: &'s str) -> &Value {
+        self.get(key).expect("index not found")
+    }
+}
+
+impl<'s> ops::IndexMut<&'s str> for InlineTable {
+    fn index_mut(&mut self, key: &'s str) -> &mut Value {
+        self.get_mut(key).expect("index not found")
+    }
+}
+
+impl<'s> ops::Index<&'s str> for Document {
+    type Output = Item;
+
+    fn index(&self, key: &'s str) -> &Item {
+        self.root.index(key)
+    }
+}
+
+impl<'s> ops::IndexMut<&'s str> for Document {
+    fn index_mut(&mut self, key: &'s str) -> &mut Item {
+        self.root.index_mut(key)
+    }
+}

third-party/vendor/toml_edit/src/inline_table.rs

@@ -0,0 +1,679 @@
+use std::iter::FromIterator;
+
+use crate::key::Key;
+use crate::repr::Decor;
+use crate::table::{Iter, IterMut, KeyValuePairs, TableKeyValue, TableLike};
+use crate::{InternalString, Item, KeyMut, RawString, Table, Value};
+
+/// Type representing a TOML inline table,
+/// payload of the `Value::InlineTable` variant
+#[derive(Debug, Default, Clone)]
+pub struct InlineTable {
+    // `preamble` represents whitespaces in an empty table
+    preamble: RawString,
+    // prefix before `{` and suffix after `}`
+    decor: Decor,
+    pub(crate) span: Option<std::ops::Range<usize>>,
+    // whether this is a proxy for dotted keys
+    dotted: bool,
+    pub(crate) items: KeyValuePairs,
+}
+
+/// Constructors
+///
+/// See also `FromIterator`
+impl InlineTable {
+    /// Creates an empty table.
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    pub(crate) fn with_pairs(items: KeyValuePairs) -> Self {
+        Self {
+            items,
+            ..Default::default()
+        }
+    }
+
+    /// Convert to a table
+    pub fn into_table(self) -> Table {
+        let mut t = Table::with_pairs(self.items);
+        t.fmt();
+        t
+    }
+}
+
+/// Formatting
+impl InlineTable {
+    /// Get key/values for values that are visually children of this table
+    ///
+    /// For example, this will return dotted keys
+    pub fn get_values(&self) -> Vec<(Vec<&Key>, &Value)> {
+        let mut values = Vec::new();
+        let root = Vec::new();
+        self.append_values(&root, &mut values);
+        values
+    }
+
+    pub(crate) fn append_values<'s, 'c>(
+        &'s self,
+        parent: &[&'s Key],
+        values: &'c mut Vec<(Vec<&'s Key>, &'s Value)>,
+    ) {
+        for value in self.items.values() {
+            let mut path = parent.to_vec();
+            path.push(&value.key);
+            match &value.value {
+                Item::Value(Value::InlineTable(table)) if table.is_dotted() => {
+                    table.append_values(&path, values);
+                }
+                Item::Value(value) => {
+                    values.push((path, value));
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// Auto formats the table.
+    pub fn fmt(&mut self) {
+        decorate_inline_table(self);
+    }
+
+    /// Sorts the key/value pairs by key.
+    pub fn sort_values(&mut self) {
+        // Assuming standard tables have their position set and this won't negatively impact them
+        self.items.sort_keys();
+        for kv in self.items.values_mut() {
+            match &mut kv.value {
+                Item::Value(Value::InlineTable(table)) if table.is_dotted() => {
+                    table.sort_values();
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// Sort Key/Value Pairs of the table using the using the comparison function `compare`.
+    ///
+    /// The comparison function receives two key and value pairs to compare (you can sort by keys or
+    /// values or their combination as needed).
+    pub fn sort_values_by<F>(&mut self, mut compare: F)
+    where
+        F: FnMut(&Key, &Value, &Key, &Value) -> std::cmp::Ordering,
+    {
+        self.sort_values_by_internal(&mut compare);
+    }
+
+    fn sort_values_by_internal<F>(&mut self, compare: &mut F)
+    where
+        F: FnMut(&Key, &Value, &Key, &Value) -> std::cmp::Ordering,
+    {
+        let modified_cmp = |_: &InternalString,
+                            val1: &TableKeyValue,
+                            _: &InternalString,
+                            val2: &TableKeyValue|
+         -> std::cmp::Ordering {
+            match (val1.value.as_value(), val2.value.as_value()) {
+                (Some(v1), Some(v2)) => compare(&val1.key, v1, &val2.key, v2),
+                (Some(_), None) => std::cmp::Ordering::Greater,
+                (None, Some(_)) => std::cmp::Ordering::Less,
+                (None, None) => std::cmp::Ordering::Equal,
+            }
+        };
+
+        self.items.sort_by(modified_cmp);
+        for kv in self.items.values_mut() {
+            match &mut kv.value {
+                Item::Value(Value::InlineTable(table)) if table.is_dotted() => {
+                    table.sort_values_by_internal(compare);
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// Change this table's dotted status
+    pub fn set_dotted(&mut self, yes: bool) {
+        self.dotted = yes;
+    }
+
+    /// Check if this is a wrapper for dotted keys, rather than a standard table
+    pub fn is_dotted(&self) -> bool {
+        self.dotted
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        &mut self.decor
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor(&self) -> &Decor {
+        &self.decor
+    }
+
+    /// Returns the decor associated with a given key of the table.
+    pub fn key_decor_mut(&mut self, key: &str) -> Option<&mut Decor> {
+        self.items.get_mut(key).map(|kv| &mut kv.key.decor)
+    }
+
+    /// Returns the decor associated with a given key of the table.
+    pub fn key_decor(&self, key: &str) -> Option<&Decor> {
+        self.items.get(key).map(|kv| &kv.key.decor)
+    }
+
+    /// Set whitespace after before element
+    pub fn set_preamble(&mut self, preamble: impl Into<RawString>) {
+        self.preamble = preamble.into();
+    }
+
+    /// Whitespace after before element
+    pub fn preamble(&self) -> &RawString {
+        &self.preamble
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.span.clone()
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.span = None;
+        self.decor.despan(input);
+        self.preamble.despan(input);
+        for kv in self.items.values_mut() {
+            kv.key.despan(input);
+            kv.value.despan(input);
+        }
+    }
+}
+
+impl InlineTable {
+    /// Returns an iterator over key/value pairs.
+    pub fn iter(&self) -> InlineTableIter<'_> {
+        Box::new(
+            self.items
+                .iter()
+                .filter(|&(_, kv)| kv.value.is_value())
+                .map(|(k, kv)| (&k[..], kv.value.as_value().unwrap())),
+        )
+    }
+
+    /// Returns an iterator over key/value pairs.
+    pub fn iter_mut(&mut self) -> InlineTableIterMut<'_> {
+        Box::new(
+            self.items
+                .iter_mut()
+                .filter(|(_, kv)| kv.value.is_value())
+                .map(|(_, kv)| (kv.key.as_mut(), kv.value.as_value_mut().unwrap())),
+        )
+    }
+
+    /// Returns the number of key/value pairs.
+    pub fn len(&self) -> usize {
+        self.iter().count()
+    }
+
+    /// Returns true iff the table is empty.
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    /// Clears the table, removing all key-value pairs. Keeps the allocated memory for reuse.
+    pub fn clear(&mut self) {
+        self.items.clear()
+    }
+
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    pub fn entry(&'_ mut self, key: impl Into<InternalString>) -> InlineEntry<'_> {
+        match self.items.entry(key.into()) {
+            indexmap::map::Entry::Occupied(mut entry) => {
+                // Ensure it is a `Value` to simplify `InlineOccupiedEntry`'s code.
+                let scratch = std::mem::take(&mut entry.get_mut().value);
+                let scratch = Item::Value(
+                    scratch
+                        .into_value()
+                        // HACK: `Item::None` is a corner case of a corner case, let's just pick a
+                        // "safe" value
+                        .unwrap_or_else(|_| Value::InlineTable(Default::default())),
+                );
+                entry.get_mut().value = scratch;
+
+                InlineEntry::Occupied(InlineOccupiedEntry { entry })
+            }
+            indexmap::map::Entry::Vacant(entry) => {
+                InlineEntry::Vacant(InlineVacantEntry { entry, key: None })
+            }
+        }
+    }
+
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    pub fn entry_format<'a>(&'a mut self, key: &Key) -> InlineEntry<'a> {
+        // Accept a `&Key` to be consistent with `entry`
+        match self.items.entry(key.get().into()) {
+            indexmap::map::Entry::Occupied(mut entry) => {
+                // Ensure it is a `Value` to simplify `InlineOccupiedEntry`'s code.
+                let scratch = std::mem::take(&mut entry.get_mut().value);
+                let scratch = Item::Value(
+                    scratch
+                        .into_value()
+                        // HACK: `Item::None` is a corner case of a corner case, let's just pick a
+                        // "safe" value
+                        .unwrap_or_else(|_| Value::InlineTable(Default::default())),
+                );
+                entry.get_mut().value = scratch;
+
+                InlineEntry::Occupied(InlineOccupiedEntry { entry })
+            }
+            indexmap::map::Entry::Vacant(entry) => InlineEntry::Vacant(InlineVacantEntry {
+                entry,
+                key: Some(key.clone()),
+            }),
+        }
+    }
+    /// Return an optional reference to the value at the given the key.
+    pub fn get(&self, key: &str) -> Option<&Value> {
+        self.items.get(key).and_then(|kv| kv.value.as_value())
+    }
+
+    /// Return an optional mutable reference to the value at the given the key.
+    pub fn get_mut(&mut self, key: &str) -> Option<&mut Value> {
+        self.items
+            .get_mut(key)
+            .and_then(|kv| kv.value.as_value_mut())
+    }
+
+    /// Return references to the key-value pair stored for key, if it is present, else None.
+    pub fn get_key_value<'a>(&'a self, key: &str) -> Option<(&'a Key, &'a Item)> {
+        self.items.get(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some((&kv.key, &kv.value))
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Return mutable references to the key-value pair stored for key, if it is present, else None.
+    pub fn get_key_value_mut<'a>(&'a mut self, key: &str) -> Option<(KeyMut<'a>, &'a mut Item)> {
+        self.items.get_mut(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some((kv.key.as_mut(), &mut kv.value))
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Returns true iff the table contains given key.
+    pub fn contains_key(&self, key: &str) -> bool {
+        if let Some(kv) = self.items.get(key) {
+            kv.value.is_value()
+        } else {
+            false
+        }
+    }
+
+    /// Inserts a key/value pair if the table does not contain the key.
+    /// Returns a mutable reference to the corresponding value.
+    pub fn get_or_insert<V: Into<Value>>(
+        &mut self,
+        key: impl Into<InternalString>,
+        value: V,
+    ) -> &mut Value {
+        let key = key.into();
+        self.items
+            .entry(key.clone())
+            .or_insert(TableKeyValue::new(Key::new(key), Item::Value(value.into())))
+            .value
+            .as_value_mut()
+            .expect("non-value type in inline table")
+    }
+
+    /// Inserts a key-value pair into the map.
+    pub fn insert(&mut self, key: impl Into<InternalString>, value: Value) -> Option<Value> {
+        let key = key.into();
+        let kv = TableKeyValue::new(Key::new(key.clone()), Item::Value(value));
+        self.items
+            .insert(key, kv)
+            .and_then(|kv| kv.value.into_value().ok())
+    }
+
+    /// Inserts a key-value pair into the map.
+    pub fn insert_formatted(&mut self, key: &Key, value: Value) -> Option<Value> {
+        let kv = TableKeyValue::new(key.to_owned(), Item::Value(value));
+        self.items
+            .insert(InternalString::from(key.get()), kv)
+            .filter(|kv| kv.value.is_value())
+            .map(|kv| kv.value.into_value().unwrap())
+    }
+
+    /// Removes an item given the key.
+    pub fn remove(&mut self, key: &str) -> Option<Value> {
+        self.items
+            .shift_remove(key)
+            .and_then(|kv| kv.value.into_value().ok())
+    }
+
+    /// Removes a key from the map, returning the stored key and value if the key was previously in the map.
+    pub fn remove_entry(&mut self, key: &str) -> Option<(Key, Value)> {
+        self.items.shift_remove(key).and_then(|kv| {
+            let key = kv.key;
+            kv.value.into_value().ok().map(|value| (key, value))
+        })
+    }
+
+    /// Retains only the elements specified by the `keep` predicate.
+    ///
+    /// In other words, remove all pairs `(key, value)` for which
+    /// `keep(&key, &mut value)` returns `false`.
+    ///
+    /// The elements are visited in iteration order.
+    pub fn retain<F>(&mut self, mut keep: F)
+    where
+        F: FnMut(&str, &mut Value) -> bool,
+    {
+        self.items.retain(|key, item| {
+            item.value
+                .as_value_mut()
+                .map(|value| keep(key, value))
+                .unwrap_or(false)
+        });
+    }
+}
+
+impl std::fmt::Display for InlineTable {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        crate::encode::Encode::encode(self, f, None, ("", ""))
+    }
+}
+
+impl<K: Into<Key>, V: Into<Value>> Extend<(K, V)> for InlineTable {
+    fn extend<T: IntoIterator<Item = (K, V)>>(&mut self, iter: T) {
+        for (key, value) in iter {
+            let key = key.into();
+            let value = Item::Value(value.into());
+            let value = TableKeyValue::new(key, value);
+            self.items
+                .insert(InternalString::from(value.key.get()), value);
+        }
+    }
+}
+
+impl<K: Into<Key>, V: Into<Value>> FromIterator<(K, V)> for InlineTable {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = (K, V)>,
+    {
+        let mut table = InlineTable::new();
+        table.extend(iter);
+        table
+    }
+}
+
+impl IntoIterator for InlineTable {
+    type Item = (InternalString, Value);
+    type IntoIter = InlineTableIntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        Box::new(
+            self.items
+                .into_iter()
+                .filter(|(_, kv)| kv.value.is_value())
+                .map(|(k, kv)| (k, kv.value.into_value().unwrap())),
+        )
+    }
+}
+
+impl<'s> IntoIterator for &'s InlineTable {
+    type Item = (&'s str, &'s Value);
+    type IntoIter = InlineTableIter<'s>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+fn decorate_inline_table(table: &mut InlineTable) {
+    for (key_decor, value) in table
+        .items
+        .iter_mut()
+        .filter(|&(_, ref kv)| kv.value.is_value())
+        .map(|(_, kv)| (&mut kv.key.decor, kv.value.as_value_mut().unwrap()))
+    {
+        key_decor.clear();
+        value.decor_mut().clear();
+    }
+}
+
+/// An owned iterator type over key/value pairs of an inline table.
+pub type InlineTableIntoIter = Box<dyn Iterator<Item = (InternalString, Value)>>;
+/// An iterator type over key/value pairs of an inline table.
+pub type InlineTableIter<'a> = Box<dyn Iterator<Item = (&'a str, &'a Value)> + 'a>;
+/// A mutable iterator type over key/value pairs of an inline table.
+pub type InlineTableIterMut<'a> = Box<dyn Iterator<Item = (KeyMut<'a>, &'a mut Value)> + 'a>;
+
+impl TableLike for InlineTable {
+    fn iter(&self) -> Iter<'_> {
+        Box::new(self.items.iter().map(|(key, kv)| (&key[..], &kv.value)))
+    }
+    fn iter_mut(&mut self) -> IterMut<'_> {
+        Box::new(
+            self.items
+                .iter_mut()
+                .map(|(_, kv)| (kv.key.as_mut(), &mut kv.value)),
+        )
+    }
+    fn clear(&mut self) {
+        self.clear();
+    }
+    fn entry<'a>(&'a mut self, key: &str) -> crate::Entry<'a> {
+        // Accept a `&str` rather than an owned type to keep `InternalString`, well, internal
+        match self.items.entry(key.into()) {
+            indexmap::map::Entry::Occupied(entry) => {
+                crate::Entry::Occupied(crate::OccupiedEntry { entry })
+            }
+            indexmap::map::Entry::Vacant(entry) => {
+                crate::Entry::Vacant(crate::VacantEntry { entry, key: None })
+            }
+        }
+    }
+    fn entry_format<'a>(&'a mut self, key: &Key) -> crate::Entry<'a> {
+        // Accept a `&Key` to be consistent with `entry`
+        match self.items.entry(key.get().into()) {
+            indexmap::map::Entry::Occupied(entry) => {
+                crate::Entry::Occupied(crate::OccupiedEntry { entry })
+            }
+            indexmap::map::Entry::Vacant(entry) => crate::Entry::Vacant(crate::VacantEntry {
+                entry,
+                key: Some(key.to_owned()),
+            }),
+        }
+    }
+    fn get<'s>(&'s self, key: &str) -> Option<&'s Item> {
+        self.items.get(key).map(|kv| &kv.value)
+    }
+    fn get_mut<'s>(&'s mut self, key: &str) -> Option<&'s mut Item> {
+        self.items.get_mut(key).map(|kv| &mut kv.value)
+    }
+    fn get_key_value<'a>(&'a self, key: &str) -> Option<(&'a Key, &'a Item)> {
+        self.get_key_value(key)
+    }
+    fn get_key_value_mut<'a>(&'a mut self, key: &str) -> Option<(KeyMut<'a>, &'a mut Item)> {
+        self.get_key_value_mut(key)
+    }
+    fn contains_key(&self, key: &str) -> bool {
+        self.contains_key(key)
+    }
+    fn insert(&mut self, key: &str, value: Item) -> Option<Item> {
+        self.insert(key, value.into_value().unwrap())
+            .map(Item::Value)
+    }
+    fn remove(&mut self, key: &str) -> Option<Item> {
+        self.remove(key).map(Item::Value)
+    }
+
+    fn get_values(&self) -> Vec<(Vec<&Key>, &Value)> {
+        self.get_values()
+    }
+    fn fmt(&mut self) {
+        self.fmt()
+    }
+    fn sort_values(&mut self) {
+        self.sort_values()
+    }
+    fn set_dotted(&mut self, yes: bool) {
+        self.set_dotted(yes)
+    }
+    fn is_dotted(&self) -> bool {
+        self.is_dotted()
+    }
+
+    fn key_decor_mut(&mut self, key: &str) -> Option<&mut Decor> {
+        self.key_decor_mut(key)
+    }
+    fn key_decor(&self, key: &str) -> Option<&Decor> {
+        self.key_decor(key)
+    }
+}
+
+// `{ key1 = value1, ... }`
+pub(crate) const DEFAULT_INLINE_KEY_DECOR: (&str, &str) = (" ", " ");
+
+/// A view into a single location in a map, which may be vacant or occupied.
+pub enum InlineEntry<'a> {
+    /// An occupied Entry.
+    Occupied(InlineOccupiedEntry<'a>),
+    /// A vacant Entry.
+    Vacant(InlineVacantEntry<'a>),
+}
+
+impl<'a> InlineEntry<'a> {
+    /// Returns the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("hello", map.entry("hello").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        match self {
+            InlineEntry::Occupied(e) => e.key(),
+            InlineEntry::Vacant(e) => e.key(),
+        }
+    }
+
+    /// Ensures a value is in the entry by inserting the default if empty, and returns
+    /// a mutable reference to the value in the entry.
+    pub fn or_insert(self, default: Value) -> &'a mut Value {
+        match self {
+            InlineEntry::Occupied(entry) => entry.into_mut(),
+            InlineEntry::Vacant(entry) => entry.insert(default),
+        }
+    }
+
+    /// Ensures a value is in the entry by inserting the result of the default function if empty,
+    /// and returns a mutable reference to the value in the entry.
+    pub fn or_insert_with<F: FnOnce() -> Value>(self, default: F) -> &'a mut Value {
+        match self {
+            InlineEntry::Occupied(entry) => entry.into_mut(),
+            InlineEntry::Vacant(entry) => entry.insert(default()),
+        }
+    }
+}
+
+/// A view into a single occupied location in a `IndexMap`.
+pub struct InlineOccupiedEntry<'a> {
+    entry: indexmap::map::OccupiedEntry<'a, InternalString, TableKeyValue>,
+}
+
+impl<'a> InlineOccupiedEntry<'a> {
+    /// Gets a reference to the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("foo", map.entry("foo").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        self.entry.key().as_str()
+    }
+
+    /// Gets a mutable reference to the entry key
+    pub fn key_mut(&mut self) -> KeyMut<'_> {
+        self.entry.get_mut().key.as_mut()
+    }
+
+    /// Gets a reference to the value in the entry.
+    pub fn get(&self) -> &Value {
+        self.entry.get().value.as_value().unwrap()
+    }
+
+    /// Gets a mutable reference to the value in the entry.
+    pub fn get_mut(&mut self) -> &mut Value {
+        self.entry.get_mut().value.as_value_mut().unwrap()
+    }
+
+    /// Converts the OccupiedEntry into a mutable reference to the value in the entry
+    /// with a lifetime bound to the map itself
+    pub fn into_mut(self) -> &'a mut Value {
+        self.entry.into_mut().value.as_value_mut().unwrap()
+    }
+
+    /// Sets the value of the entry, and returns the entry's old value
+    pub fn insert(&mut self, value: Value) -> Value {
+        let mut value = Item::Value(value);
+        std::mem::swap(&mut value, &mut self.entry.get_mut().value);
+        value.into_value().unwrap()
+    }
+
+    /// Takes the value out of the entry, and returns it
+    pub fn remove(self) -> Value {
+        self.entry.shift_remove().value.into_value().unwrap()
+    }
+}
+
+/// A view into a single empty location in a `IndexMap`.
+pub struct InlineVacantEntry<'a> {
+    entry: indexmap::map::VacantEntry<'a, InternalString, TableKeyValue>,
+    key: Option<Key>,
+}
+
+impl<'a> InlineVacantEntry<'a> {
+    /// Gets a reference to the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("foo", map.entry("foo").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        self.entry.key().as_str()
+    }
+
+    /// Sets the value of the entry with the VacantEntry's key,
+    /// and returns a mutable reference to it
+    pub fn insert(self, value: Value) -> &'a mut Value {
+        let entry = self.entry;
+        let key = self.key.unwrap_or_else(|| Key::new(entry.key().as_str()));
+        let value = Item::Value(value);
+        entry
+            .insert(TableKeyValue::new(key, value))
+            .value
+            .as_value_mut()
+            .unwrap()
+    }
+}

third-party/vendor/toml_edit/src/internal_string.rs

@@ -0,0 +1,183 @@
+use std::borrow::Borrow;
+use std::str::FromStr;
+
+/// Opaque string storage internal to `toml_edit`
+#[derive(Default, Clone, PartialEq, Eq, PartialOrd, Ord, Hash)]
+pub struct InternalString(Inner);
+
+#[cfg(feature = "kstring")]
+type Inner = kstring::KString;
+#[cfg(not(feature = "kstring"))]
+type Inner = String;
+
+impl InternalString {
+    /// Create an empty string
+    pub fn new() -> Self {
+        InternalString(Inner::new())
+    }
+
+    /// Access the underlying string
+    #[inline]
+    pub fn as_str(&self) -> &str {
+        self.0.as_str()
+    }
+}
+
+impl std::fmt::Debug for InternalString {
+    #[inline]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        self.0.fmt(formatter)
+    }
+}
+
+impl std::ops::Deref for InternalString {
+    type Target = str;
+
+    #[inline]
+    fn deref(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl Borrow<str> for InternalString {
+    #[inline]
+    fn borrow(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl AsRef<str> for InternalString {
+    #[inline]
+    fn as_ref(&self) -> &str {
+        self.as_str()
+    }
+}
+
+impl From<&str> for InternalString {
+    #[inline]
+    fn from(s: &str) -> Self {
+        #[cfg(feature = "kstring")]
+        let inner = kstring::KString::from_ref(s);
+        #[cfg(not(feature = "kstring"))]
+        let inner = String::from(s);
+
+        InternalString(inner)
+    }
+}
+
+impl From<String> for InternalString {
+    #[inline]
+    fn from(s: String) -> Self {
+        #[allow(clippy::useless_conversion)] // handle any string type
+        InternalString(s.into())
+    }
+}
+
+impl From<&String> for InternalString {
+    #[inline]
+    fn from(s: &String) -> Self {
+        InternalString(s.into())
+    }
+}
+
+impl From<&InternalString> for InternalString {
+    #[inline]
+    fn from(s: &InternalString) -> Self {
+        s.clone()
+    }
+}
+
+impl From<Box<str>> for InternalString {
+    #[inline]
+    fn from(s: Box<str>) -> Self {
+        InternalString(s.into())
+    }
+}
+
+impl FromStr for InternalString {
+    type Err = core::convert::Infallible;
+    #[inline]
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Ok(Self::from(s))
+    }
+}
+
+impl std::fmt::Display for InternalString {
+    #[inline]
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        self.as_str().fmt(f)
+    }
+}
+
+#[cfg(feature = "serde")]
+impl serde::Serialize for InternalString {
+    #[inline]
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: serde::Serializer,
+    {
+        serializer.serialize_str(self.as_str())
+    }
+}
+
+#[cfg(feature = "serde")]
+impl<'de> serde::Deserialize<'de> for InternalString {
+    fn deserialize<D>(deserializer: D) -> Result<Self, D::Error>
+    where
+        D: serde::Deserializer<'de>,
+    {
+        deserializer.deserialize_string(StringVisitor)
+    }
+}
+
+#[cfg(feature = "serde")]
+struct StringVisitor;
+
+#[cfg(feature = "serde")]
+impl<'de> serde::de::Visitor<'de> for StringVisitor {
+    type Value = InternalString;
+
+    fn expecting(&self, formatter: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        formatter.write_str("a string")
+    }
+
+    fn visit_str<E>(self, v: &str) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(InternalString::from(v))
+    }
+
+    fn visit_string<E>(self, v: String) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        Ok(InternalString::from(v))
+    }
+
+    fn visit_bytes<E>(self, v: &[u8]) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        match std::str::from_utf8(v) {
+            Ok(s) => Ok(InternalString::from(s)),
+            Err(_) => Err(serde::de::Error::invalid_value(
+                serde::de::Unexpected::Bytes(v),
+                &self,
+            )),
+        }
+    }
+
+    fn visit_byte_buf<E>(self, v: Vec<u8>) -> Result<Self::Value, E>
+    where
+        E: serde::de::Error,
+    {
+        match String::from_utf8(v) {
+            Ok(s) => Ok(InternalString::from(s)),
+            Err(e) => Err(serde::de::Error::invalid_value(
+                serde::de::Unexpected::Bytes(&e.into_bytes()),
+                &self,
+            )),
+        }
+    }
+}

third-party/vendor/toml_edit/src/item.rs

@@ -0,0 +1,393 @@
+use std::str::FromStr;
+
+use toml_datetime::*;
+
+use crate::array_of_tables::ArrayOfTables;
+use crate::table::TableLike;
+use crate::{Array, InlineTable, Table, Value};
+
+/// Type representing either a value, a table, an array of tables, or none.
+#[derive(Debug)]
+pub enum Item {
+    /// Type representing none.
+    None,
+    /// Type representing value.
+    Value(Value),
+    /// Type representing table.
+    Table(Table),
+    /// Type representing array of tables.
+    ArrayOfTables(ArrayOfTables),
+}
+
+impl Item {
+    /// Sets `self` to the given item iff `self` is none and
+    /// returns a mutable reference to `self`.
+    pub fn or_insert(&mut self, item: Item) -> &mut Item {
+        if self.is_none() {
+            *self = item
+        }
+        self
+    }
+}
+
+// TODO: This should be generated by macro or derive
+/// Downcasting
+impl Item {
+    /// Text description of value type
+    pub fn type_name(&self) -> &'static str {
+        match self {
+            Item::None => "none",
+            Item::Value(v) => v.type_name(),
+            Item::Table(..) => "table",
+            Item::ArrayOfTables(..) => "array of tables",
+        }
+    }
+
+    /// Index into a TOML array or map. A string index can be used to access a
+    /// value in a map, and a usize index can be used to access an element of an
+    /// array.
+    ///
+    /// Returns `None` if:
+    /// - The type of `self` does not match the type of the
+    ///   index, for example if the index is a string and `self` is an array or a
+    ///   number.
+    /// - The given key does not exist in the map
+    ///   or the given index is not within the bounds of the array.
+    pub fn get<I: crate::index::Index>(&self, index: I) -> Option<&Item> {
+        index.index(self)
+    }
+
+    /// Mutably index into a TOML array or map. A string index can be used to
+    /// access a value in a map, and a usize index can be used to access an
+    /// element of an array.
+    ///
+    /// Returns `None` if:
+    /// - The type of `self` does not match the type of the
+    ///   index, for example if the index is a string and `self` is an array or a
+    ///   number.
+    /// - The given key does not exist in the map
+    ///   or the given index is not within the bounds of the array.
+    pub fn get_mut<I: crate::index::Index>(&mut self, index: I) -> Option<&mut Item> {
+        index.index_mut(self)
+    }
+
+    /// Casts `self` to value.
+    pub fn as_value(&self) -> Option<&Value> {
+        match *self {
+            Item::Value(ref v) => Some(v),
+            _ => None,
+        }
+    }
+    /// Casts `self` to table.
+    pub fn as_table(&self) -> Option<&Table> {
+        match *self {
+            Item::Table(ref t) => Some(t),
+            _ => None,
+        }
+    }
+    /// Casts `self` to array of tables.
+    pub fn as_array_of_tables(&self) -> Option<&ArrayOfTables> {
+        match *self {
+            Item::ArrayOfTables(ref a) => Some(a),
+            _ => None,
+        }
+    }
+    /// Casts `self` to mutable value.
+    pub fn as_value_mut(&mut self) -> Option<&mut Value> {
+        match *self {
+            Item::Value(ref mut v) => Some(v),
+            _ => None,
+        }
+    }
+    /// Casts `self` to mutable table.
+    pub fn as_table_mut(&mut self) -> Option<&mut Table> {
+        match *self {
+            Item::Table(ref mut t) => Some(t),
+            _ => None,
+        }
+    }
+    /// Casts `self` to mutable array of tables.
+    pub fn as_array_of_tables_mut(&mut self) -> Option<&mut ArrayOfTables> {
+        match *self {
+            Item::ArrayOfTables(ref mut a) => Some(a),
+            _ => None,
+        }
+    }
+    /// Casts `self` to value.
+    pub fn into_value(self) -> Result<Value, Self> {
+        match self {
+            Item::None => Err(self),
+            Item::Value(v) => Ok(v),
+            Item::Table(v) => {
+                let v = v.into_inline_table();
+                Ok(Value::InlineTable(v))
+            }
+            Item::ArrayOfTables(v) => {
+                let v = v.into_array();
+                Ok(Value::Array(v))
+            }
+        }
+    }
+    /// In-place convert to a value
+    pub fn make_value(&mut self) {
+        let other = std::mem::take(self);
+        let other = other.into_value().map(Item::Value).unwrap_or(Item::None);
+        *self = other;
+    }
+    /// Casts `self` to table.
+    pub fn into_table(self) -> Result<Table, Self> {
+        match self {
+            Item::Table(t) => Ok(t),
+            Item::Value(Value::InlineTable(t)) => Ok(t.into_table()),
+            _ => Err(self),
+        }
+    }
+    /// Casts `self` to array of tables.
+    pub fn into_array_of_tables(self) -> Result<ArrayOfTables, Self> {
+        match self {
+            Item::ArrayOfTables(a) => Ok(a),
+            Item::Value(Value::Array(a)) => {
+                if a.is_empty() {
+                    Err(Item::Value(Value::Array(a)))
+                } else if a.iter().all(|v| v.is_inline_table()) {
+                    let mut aot = ArrayOfTables::new();
+                    aot.values = a.values;
+                    for value in aot.values.iter_mut() {
+                        value.make_item();
+                    }
+                    Ok(aot)
+                } else {
+                    Err(Item::Value(Value::Array(a)))
+                }
+            }
+            _ => Err(self),
+        }
+    }
+    // Starting private because the name is unclear
+    pub(crate) fn make_item(&mut self) {
+        let other = std::mem::take(self);
+        let other = match other.into_table().map(crate::Item::Table) {
+            Ok(i) => i,
+            Err(i) => i,
+        };
+        let other = match other.into_array_of_tables().map(crate::Item::ArrayOfTables) {
+            Ok(i) => i,
+            Err(i) => i,
+        };
+        *self = other;
+    }
+    /// Returns true iff `self` is a value.
+    pub fn is_value(&self) -> bool {
+        self.as_value().is_some()
+    }
+    /// Returns true iff `self` is a table.
+    pub fn is_table(&self) -> bool {
+        self.as_table().is_some()
+    }
+    /// Returns true iff `self` is an array of tables.
+    pub fn is_array_of_tables(&self) -> bool {
+        self.as_array_of_tables().is_some()
+    }
+    /// Returns true iff `self` is `None`.
+    pub fn is_none(&self) -> bool {
+        matches!(*self, Item::None)
+    }
+
+    // Duplicate Value downcasting API
+
+    /// Casts `self` to integer.
+    pub fn as_integer(&self) -> Option<i64> {
+        self.as_value().and_then(Value::as_integer)
+    }
+
+    /// Returns true iff `self` is an integer.
+    pub fn is_integer(&self) -> bool {
+        self.as_integer().is_some()
+    }
+
+    /// Casts `self` to float.
+    pub fn as_float(&self) -> Option<f64> {
+        self.as_value().and_then(Value::as_float)
+    }
+
+    /// Returns true iff `self` is a float.
+    pub fn is_float(&self) -> bool {
+        self.as_float().is_some()
+    }
+
+    /// Casts `self` to boolean.
+    pub fn as_bool(&self) -> Option<bool> {
+        self.as_value().and_then(Value::as_bool)
+    }
+
+    /// Returns true iff `self` is a boolean.
+    pub fn is_bool(&self) -> bool {
+        self.as_bool().is_some()
+    }
+
+    /// Casts `self` to str.
+    pub fn as_str(&self) -> Option<&str> {
+        self.as_value().and_then(Value::as_str)
+    }
+
+    /// Returns true iff `self` is a string.
+    pub fn is_str(&self) -> bool {
+        self.as_str().is_some()
+    }
+
+    /// Casts `self` to date-time.
+    pub fn as_datetime(&self) -> Option<&Datetime> {
+        self.as_value().and_then(Value::as_datetime)
+    }
+
+    /// Returns true iff `self` is a date-time.
+    pub fn is_datetime(&self) -> bool {
+        self.as_datetime().is_some()
+    }
+
+    /// Casts `self` to array.
+    pub fn as_array(&self) -> Option<&Array> {
+        self.as_value().and_then(Value::as_array)
+    }
+
+    /// Casts `self` to mutable array.
+    pub fn as_array_mut(&mut self) -> Option<&mut Array> {
+        self.as_value_mut().and_then(Value::as_array_mut)
+    }
+
+    /// Returns true iff `self` is an array.
+    pub fn is_array(&self) -> bool {
+        self.as_array().is_some()
+    }
+
+    /// Casts `self` to inline table.
+    pub fn as_inline_table(&self) -> Option<&InlineTable> {
+        self.as_value().and_then(Value::as_inline_table)
+    }
+
+    /// Casts `self` to mutable inline table.
+    pub fn as_inline_table_mut(&mut self) -> Option<&mut InlineTable> {
+        self.as_value_mut().and_then(Value::as_inline_table_mut)
+    }
+
+    /// Returns true iff `self` is an inline table.
+    pub fn is_inline_table(&self) -> bool {
+        self.as_inline_table().is_some()
+    }
+
+    /// Casts `self` to either a table or an inline table.
+    pub fn as_table_like(&self) -> Option<&dyn TableLike> {
+        self.as_table()
+            .map(|t| t as &dyn TableLike)
+            .or_else(|| self.as_inline_table().map(|t| t as &dyn TableLike))
+    }
+
+    /// Casts `self` to either a table or an inline table.
+    pub fn as_table_like_mut(&mut self) -> Option<&mut dyn TableLike> {
+        match self {
+            Item::Table(t) => Some(t as &mut dyn TableLike),
+            Item::Value(Value::InlineTable(t)) => Some(t as &mut dyn TableLike),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is either a table, or an inline table.
+    pub fn is_table_like(&self) -> bool {
+        self.as_table_like().is_some()
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        match self {
+            Item::None => None,
+            Item::Value(v) => v.span(),
+            Item::Table(v) => v.span(),
+            Item::ArrayOfTables(v) => v.span(),
+        }
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        match self {
+            Item::None => {}
+            Item::Value(v) => v.despan(input),
+            Item::Table(v) => v.despan(input),
+            Item::ArrayOfTables(v) => v.despan(input),
+        }
+    }
+}
+
+impl Clone for Item {
+    #[inline(never)]
+    fn clone(&self) -> Self {
+        match self {
+            Item::None => Item::None,
+            Item::Value(v) => Item::Value(v.clone()),
+            Item::Table(v) => Item::Table(v.clone()),
+            Item::ArrayOfTables(v) => Item::ArrayOfTables(v.clone()),
+        }
+    }
+}
+
+impl Default for Item {
+    fn default() -> Self {
+        Item::None
+    }
+}
+
+impl FromStr for Item {
+    type Err = crate::TomlError;
+
+    /// Parses a value from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        let value = s.parse::<Value>()?;
+        Ok(Item::Value(value))
+    }
+}
+
+impl std::fmt::Display for Item {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        match &self {
+            Item::None => Ok(()),
+            Item::Value(v) => v.fmt(f),
+            Item::Table(v) => v.fmt(f),
+            Item::ArrayOfTables(v) => v.fmt(f),
+        }
+    }
+}
+
+/// Returns a formatted value.
+///
+/// Since formatting is part of a `Value`, the right hand side of the
+/// assignment needs to be decorated with a space before the value.
+/// The `value` function does just that.
+///
+/// # Examples
+/// ```rust
+/// # use snapbox::assert_eq;
+/// # use toml_edit::*;
+/// let mut table = Table::default();
+/// let mut array = Array::default();
+/// array.push("hello");
+/// array.push("\\, world"); // \ is only allowed in a literal string
+/// table["key1"] = value("value1");
+/// table["key2"] = value(42);
+/// table["key3"] = value(array);
+/// assert_eq(table.to_string(),
+/// r#"key1 = "value1"
+/// key2 = 42
+/// key3 = ["hello", '\, world']
+/// "#);
+/// ```
+pub fn value<V: Into<Value>>(v: V) -> Item {
+    Item::Value(v.into())
+}
+
+/// Returns an empty table.
+pub fn table() -> Item {
+    Item::Table(Table::new())
+}
+
+/// Returns an empty array of tables.
+pub fn array() -> Item {
+    Item::ArrayOfTables(ArrayOfTables::new())
+}

third-party/vendor/toml_edit/src/key.rs

@@ -0,0 +1,344 @@
+use std::borrow::Cow;
+use std::str::FromStr;
+
+use crate::encode::{to_string_repr, StringStyle};
+use crate::parser;
+use crate::parser::key::is_unquoted_char;
+use crate::repr::{Decor, Repr};
+use crate::InternalString;
+
+/// Key as part of a Key/Value Pair or a table header.
+///
+/// # Examples
+///
+/// ```notrust
+/// [dependencies."nom"]
+/// version = "5.0"
+/// 'literal key' = "nonsense"
+/// "basic string key" = 42
+/// ```
+///
+/// There are 3 types of keys:
+///
+/// 1. Bare keys (`version` and `dependencies`)
+///
+/// 2. Basic quoted keys (`"basic string key"` and `"nom"`)
+///
+/// 3. Literal quoted keys (`'literal key'`)
+///
+/// For details see [toml spec](https://github.com/toml-lang/toml/#keyvalue-pair).
+///
+/// To parse a key use `FromStr` trait implementation: `"string".parse::<Key>()`.
+#[derive(Debug)]
+pub struct Key {
+    key: InternalString,
+    pub(crate) repr: Option<Repr>,
+    pub(crate) decor: Decor,
+}
+
+impl Key {
+    /// Create a new table key
+    pub fn new(key: impl Into<InternalString>) -> Self {
+        Self {
+            key: key.into(),
+            repr: None,
+            decor: Default::default(),
+        }
+    }
+
+    /// Parse a TOML key expression
+    ///
+    /// Unlike `"".parse<Key>()`, this supports dotted keys.
+    pub fn parse(repr: &str) -> Result<Vec<Self>, crate::TomlError> {
+        Self::try_parse_path(repr)
+    }
+
+    pub(crate) fn with_repr_unchecked(mut self, repr: Repr) -> Self {
+        self.repr = Some(repr);
+        self
+    }
+
+    /// While creating the `Key`, add `Decor` to it
+    pub fn with_decor(mut self, decor: Decor) -> Self {
+        self.decor = decor;
+        self
+    }
+
+    /// Access a mutable proxy for the `Key`.
+    pub fn as_mut(&mut self) -> KeyMut<'_> {
+        KeyMut { key: self }
+    }
+
+    /// Returns the parsed key value.
+    pub fn get(&self) -> &str {
+        &self.key
+    }
+
+    pub(crate) fn get_internal(&self) -> &InternalString {
+        &self.key
+    }
+
+    /// Returns key raw representation, if available.
+    pub fn as_repr(&self) -> Option<&Repr> {
+        self.repr.as_ref()
+    }
+
+    /// Returns the default raw representation.
+    pub fn default_repr(&self) -> Repr {
+        to_key_repr(&self.key)
+    }
+
+    /// Returns a raw representation.
+    pub fn display_repr(&self) -> Cow<'_, str> {
+        self.as_repr()
+            .and_then(|r| r.as_raw().as_str())
+            .map(Cow::Borrowed)
+            .unwrap_or_else(|| {
+                Cow::Owned(self.default_repr().as_raw().as_str().unwrap().to_owned())
+            })
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        &mut self.decor
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor(&self) -> &Decor {
+        &self.decor
+    }
+
+    /// Returns the location within the original document
+    #[cfg(feature = "serde")]
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.repr.as_ref().and_then(|r| r.span())
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.decor.despan(input);
+        if let Some(repr) = &mut self.repr {
+            repr.despan(input)
+        }
+    }
+
+    /// Auto formats the key.
+    pub fn fmt(&mut self) {
+        self.repr = Some(to_key_repr(&self.key));
+        self.decor.clear();
+    }
+
+    fn try_parse_simple(s: &str) -> Result<Key, crate::TomlError> {
+        let mut key = parser::parse_key(s)?;
+        key.despan(s);
+        Ok(key)
+    }
+
+    fn try_parse_path(s: &str) -> Result<Vec<Key>, crate::TomlError> {
+        let mut keys = parser::parse_key_path(s)?;
+        for key in &mut keys {
+            key.despan(s);
+        }
+        Ok(keys)
+    }
+}
+
+impl Clone for Key {
+    #[inline(never)]
+    fn clone(&self) -> Self {
+        Self {
+            key: self.key.clone(),
+            repr: self.repr.clone(),
+            decor: self.decor.clone(),
+        }
+    }
+}
+
+impl std::ops::Deref for Key {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        self.get()
+    }
+}
+
+impl std::hash::Hash for Key {
+    fn hash<H: std::hash::Hasher>(&self, state: &mut H) {
+        self.get().hash(state);
+    }
+}
+
+impl Ord for Key {
+    fn cmp(&self, other: &Self) -> std::cmp::Ordering {
+        self.get().cmp(other.get())
+    }
+}
+
+impl PartialOrd for Key {
+    fn partial_cmp(&self, other: &Self) -> Option<std::cmp::Ordering> {
+        Some(self.cmp(other))
+    }
+}
+
+impl Eq for Key {}
+
+impl PartialEq for Key {
+    #[inline]
+    fn eq(&self, other: &Key) -> bool {
+        PartialEq::eq(self.get(), other.get())
+    }
+}
+
+impl PartialEq<str> for Key {
+    #[inline]
+    fn eq(&self, other: &str) -> bool {
+        PartialEq::eq(self.get(), other)
+    }
+}
+
+impl<'s> PartialEq<&'s str> for Key {
+    #[inline]
+    fn eq(&self, other: &&str) -> bool {
+        PartialEq::eq(self.get(), *other)
+    }
+}
+
+impl PartialEq<String> for Key {
+    #[inline]
+    fn eq(&self, other: &String) -> bool {
+        PartialEq::eq(self.get(), other.as_str())
+    }
+}
+
+impl std::fmt::Display for Key {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        crate::encode::Encode::encode(self, f, None, ("", ""))
+    }
+}
+
+impl FromStr for Key {
+    type Err = crate::TomlError;
+
+    /// Tries to parse a key from a &str,
+    /// if fails, tries as basic quoted key (surrounds with "")
+    /// and then literal quoted key (surrounds with '')
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        Key::try_parse_simple(s)
+    }
+}
+
+fn to_key_repr(key: &str) -> Repr {
+    if key.as_bytes().iter().copied().all(is_unquoted_char) && !key.is_empty() {
+        Repr::new_unchecked(key)
+    } else {
+        to_string_repr(key, Some(StringStyle::OnelineSingle), Some(false))
+    }
+}
+
+impl<'b> From<&'b str> for Key {
+    fn from(s: &'b str) -> Self {
+        Key::new(s)
+    }
+}
+
+impl<'b> From<&'b String> for Key {
+    fn from(s: &'b String) -> Self {
+        Key::new(s)
+    }
+}
+
+impl From<String> for Key {
+    fn from(s: String) -> Self {
+        Key::new(s)
+    }
+}
+
+impl From<InternalString> for Key {
+    fn from(s: InternalString) -> Self {
+        Key::new(s)
+    }
+}
+
+#[doc(hidden)]
+impl From<Key> for InternalString {
+    fn from(key: Key) -> InternalString {
+        key.key
+    }
+}
+
+/// A mutable reference to a `Key`
+#[derive(Debug, Eq, PartialEq, PartialOrd, Ord, Hash)]
+pub struct KeyMut<'k> {
+    key: &'k mut Key,
+}
+
+impl<'k> KeyMut<'k> {
+    /// Returns the parsed key value.
+    pub fn get(&self) -> &str {
+        self.key.get()
+    }
+
+    /// Returns the raw representation, if available.
+    pub fn as_repr(&self) -> Option<&Repr> {
+        self.key.as_repr()
+    }
+
+    /// Returns the default raw representation.
+    pub fn default_repr(&self) -> Repr {
+        self.key.default_repr()
+    }
+
+    /// Returns a raw representation.
+    pub fn display_repr(&self) -> Cow<str> {
+        self.key.display_repr()
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        self.key.decor_mut()
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor(&self) -> &Decor {
+        self.key.decor()
+    }
+
+    /// Auto formats the key.
+    pub fn fmt(&mut self) {
+        self.key.fmt()
+    }
+}
+
+impl<'k> std::ops::Deref for KeyMut<'k> {
+    type Target = str;
+
+    fn deref(&self) -> &Self::Target {
+        self.get()
+    }
+}
+
+impl<'s> PartialEq<str> for KeyMut<'s> {
+    #[inline]
+    fn eq(&self, other: &str) -> bool {
+        PartialEq::eq(self.get(), other)
+    }
+}
+
+impl<'s> PartialEq<&'s str> for KeyMut<'s> {
+    #[inline]
+    fn eq(&self, other: &&str) -> bool {
+        PartialEq::eq(self.get(), *other)
+    }
+}
+
+impl<'s> PartialEq<String> for KeyMut<'s> {
+    #[inline]
+    fn eq(&self, other: &String) -> bool {
+        PartialEq::eq(self.get(), other.as_str())
+    }
+}
+
+impl<'k> std::fmt::Display for KeyMut<'k> {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        std::fmt::Display::fmt(&self.key, f)
+    }
+}

third-party/vendor/toml_edit/src/lib.rs

@@ -0,0 +1,124 @@
+#![deny(missing_docs)]
+// https://github.com/Marwes/combine/issues/172
+#![recursion_limit = "256"]
+#![cfg_attr(docsrs, feature(doc_auto_cfg))]
+
+//! # `toml_edit`
+//!
+//! This crate allows you to parse and modify toml
+//! documents, while preserving comments, spaces *and
+//! relative order* or items.
+//!
+//! If you also need the ease of a more traditional API, see the [`toml`] crate.
+//!
+//! # Example
+//!
+//! ```rust
+//! use toml_edit::{Document, value};
+//!
+//! let toml = r#"
+//! "hello" = 'toml!' # comment
+//! ['a'.b]
+//! "#;
+//! let mut doc = toml.parse::<Document>().expect("invalid doc");
+//! assert_eq!(doc.to_string(), toml);
+//! // let's add a new key/value pair inside a.b: c = {d = "hello"}
+//! doc["a"]["b"]["c"]["d"] = value("hello");
+//! // autoformat inline table a.b.c: { d = "hello" }
+//! doc["a"]["b"]["c"].as_inline_table_mut().map(|t| t.fmt());
+//! let expected = r#"
+//! "hello" = 'toml!' # comment
+//! ['a'.b]
+//! c = { d = "hello" }
+//! "#;
+//! assert_eq!(doc.to_string(), expected);
+//! ```
+//!
+//! ## Controlling formatting
+//!
+//! By default, values are created with default formatting
+//! ```rust
+//! let mut doc = toml_edit::Document::new();
+//! doc["foo"] = toml_edit::value("bar");
+//! let expected = r#"foo = "bar"
+//! "#;
+//! assert_eq!(doc.to_string(), expected);
+//! ```
+//!
+//! You can choose a custom TOML representation by parsing the value.
+//! ```rust
+//! let mut doc = toml_edit::Document::new();
+//! doc["foo"] = "'bar'".parse::<toml_edit::Item>().unwrap();
+//! let expected = r#"foo = 'bar'
+//! "#;
+//! assert_eq!(doc.to_string(), expected);
+//! ```
+//!
+//! ## Limitations
+//!
+//! Things it does not preserve:
+//!
+//! * Scattered array of tables (tables are reordered by default, see [test]).
+//! * Order of dotted keys, see [issue](https://github.com/ordian/toml_edit/issues/163).
+//!
+//! [`toml`]: https://docs.rs/toml/latest/toml/
+//! [test]: https://github.com/ordian/toml_edit/blob/f09bd5d075fdb7d2ef8d9bb3270a34506c276753/tests/test_valid.rs#L84
+
+mod array;
+mod array_of_tables;
+mod document;
+mod encode;
+mod index;
+mod inline_table;
+mod internal_string;
+mod item;
+mod key;
+mod parser;
+mod raw_string;
+mod repr;
+mod table;
+mod value;
+
+#[cfg(feature = "serde")]
+pub mod de;
+#[cfg(feature = "serde")]
+pub mod ser;
+
+pub mod visit;
+pub mod visit_mut;
+
+pub use crate::array::{Array, ArrayIntoIter, ArrayIter, ArrayIterMut};
+pub use crate::array_of_tables::{
+    ArrayOfTables, ArrayOfTablesIntoIter, ArrayOfTablesIter, ArrayOfTablesIterMut,
+};
+pub use crate::document::Document;
+pub use crate::inline_table::{
+    InlineEntry, InlineOccupiedEntry, InlineTable, InlineTableIntoIter, InlineTableIter,
+    InlineTableIterMut, InlineVacantEntry,
+};
+pub use crate::internal_string::InternalString;
+pub use crate::item::{array, table, value, Item};
+pub use crate::key::{Key, KeyMut};
+pub use crate::parser::TomlError;
+pub use crate::raw_string::RawString;
+pub use crate::repr::{Decor, Formatted, Repr};
+pub use crate::table::{
+    Entry, IntoIter, Iter, IterMut, OccupiedEntry, Table, TableLike, VacantEntry,
+};
+pub use crate::value::Value;
+pub use toml_datetime::*;
+
+// Prevent users from some traits.
+pub(crate) mod private {
+    pub trait Sealed {}
+    impl Sealed for usize {}
+    impl Sealed for str {}
+    impl Sealed for String {}
+    impl Sealed for i64 {}
+    impl Sealed for f64 {}
+    impl Sealed for bool {}
+    impl Sealed for crate::Datetime {}
+    impl<'a, T: ?Sized> Sealed for &'a T where T: Sealed {}
+    impl Sealed for crate::Table {}
+    impl Sealed for crate::InlineTable {}
+}

third-party/vendor/toml_edit/src/parser/array.rs

@@ -0,0 +1,146 @@
+use winnow::combinator::cut_err;
+use winnow::combinator::delimited;
+use winnow::combinator::opt;
+use winnow::combinator::separated1;
+use winnow::trace::trace;
+
+use crate::parser::trivia::ws_comment_newline;
+use crate::parser::value::value;
+use crate::{Array, Item, RawString, Value};
+
+use crate::parser::prelude::*;
+
+// ;; Array
+
+// array = array-open array-values array-close
+pub(crate) fn array<'i>(check: RecursionCheck) -> impl Parser<Input<'i>, Array, ContextError> {
+    trace("array", move |input: &mut Input<'i>| {
+        delimited(
+            ARRAY_OPEN,
+            cut_err(array_values(check)),
+            cut_err(ARRAY_CLOSE)
+                .context(StrContext::Label("array"))
+                .context(StrContext::Expected(StrContextValue::CharLiteral(']'))),
+        )
+        .parse_next(input)
+    })
+}
+
+// note: we're omitting ws and newlines here, because
+// they should be part of the formatted values
+// array-open  = %x5B ws-newline  ; [
+pub(crate) const ARRAY_OPEN: u8 = b'[';
+// array-close = ws-newline %x5D  ; ]
+const ARRAY_CLOSE: u8 = b']';
+// array-sep = ws %x2C ws  ; , Comma
+const ARRAY_SEP: u8 = b',';
+
+// note: this rule is modified
+// array-values = [ ( array-value array-sep array-values ) /
+//                  array-value / ws-comment-newline ]
+pub(crate) fn array_values<'i>(
+    check: RecursionCheck,
+) -> impl Parser<Input<'i>, Array, ContextError> {
+    move |input: &mut Input<'i>| {
+        let check = check.recursing(input)?;
+        (
+            opt(
+                (separated1(array_value(check), ARRAY_SEP), opt(ARRAY_SEP)).map(
+                    |(v, trailing): (Vec<Value>, Option<u8>)| {
+                        (
+                            Array::with_vec(v.into_iter().map(Item::Value).collect()),
+                            trailing.is_some(),
+                        )
+                    },
+                ),
+            ),
+            ws_comment_newline.span(),
+        )
+            .try_map::<_, _, std::str::Utf8Error>(|(array, trailing)| {
+                let (mut array, comma) = array.unwrap_or_default();
+                array.set_trailing_comma(comma);
+                array.set_trailing(RawString::with_span(trailing));
+                Ok(array)
+            })
+            .parse_next(input)
+    }
+}
+
+pub(crate) fn array_value<'i>(
+    check: RecursionCheck,
+) -> impl Parser<Input<'i>, Value, ContextError> {
+    move |input: &mut Input<'i>| {
+        (
+            ws_comment_newline.span(),
+            value(check),
+            ws_comment_newline.span(),
+        )
+            .map(|(ws1, v, ws2)| v.decorated(RawString::with_span(ws1), RawString::with_span(ws2)))
+            .parse_next(input)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn arrays() {
+        let inputs = [
+            r#"[]"#,
+            r#"[   ]"#,
+            r#"[
+  1, 2, 3
+]"#,
+            r#"[
+  1,
+  2, # this is ok
+]"#,
+            r#"[# comment
+# comment2
+
+
+   ]"#,
+            r#"[# comment
+# comment2
+      1
+
+#sd
+,
+# comment3
+
+   ]"#,
+            r#"[1]"#,
+            r#"[1,]"#,
+            r#"[ "all", 'strings', """are the same""", '''type''']"#,
+            r#"[ 100, -2,]"#,
+            r#"[1, 2, 3]"#,
+            r#"[1.1, 2.1, 3.1]"#,
+            r#"["a", "b", "c"]"#,
+            r#"[ [ 1, 2 ], [3, 4, 5] ]"#,
+            r#"[ [ 1, 2 ], ["a", "b", "c"] ]"#,
+            r#"[ { x = 1, a = "2" }, {a = "a",b = "b",     c =    "c"} ]"#,
+        ];
+        for input in inputs {
+            dbg!(input);
+            let mut parsed = array(Default::default()).parse(new_input(input));
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan(input);
+            }
+            assert_eq!(parsed.map(|a| a.to_string()), Ok(input.to_owned()));
+        }
+    }
+
+    #[test]
+    fn invalid_arrays() {
+        let invalid_inputs = [r#"["#, r#"[,]"#, r#"[,2]"#, r#"[1e165,,]"#];
+        for input in invalid_inputs {
+            dbg!(input);
+            let mut parsed = array(Default::default()).parse(new_input(input));
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan(input);
+            }
+            assert!(parsed.is_err());
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/datetime.rs

@@ -0,0 +1,446 @@
+use std::ops::RangeInclusive;
+
+use crate::parser::errors::CustomError;
+use crate::parser::prelude::*;
+use crate::parser::trivia::from_utf8_unchecked;
+
+use toml_datetime::*;
+use winnow::combinator::alt;
+use winnow::combinator::cut_err;
+use winnow::combinator::opt;
+use winnow::combinator::preceded;
+use winnow::token::one_of;
+use winnow::token::take_while;
+use winnow::trace::trace;
+
+// ;; Date and Time (as defined in RFC 3339)
+
+// date-time = offset-date-time / local-date-time / local-date / local-time
+// offset-date-time = full-date time-delim full-time
+// local-date-time = full-date time-delim partial-time
+// local-date = full-date
+// local-time = partial-time
+// full-time = partial-time time-offset
+pub(crate) fn date_time(input: &mut Input<'_>) -> PResult<Datetime> {
+    trace(
+        "date-time",
+        alt((
+            (full_date, opt((time_delim, partial_time, opt(time_offset))))
+                .map(|(date, opt)| {
+                    match opt {
+                        // Offset Date-Time
+                        Some((_, time, offset)) => Datetime {
+                            date: Some(date),
+                            time: Some(time),
+                            offset,
+                        },
+                        // Local Date
+                        None => Datetime {
+                            date: Some(date),
+                            time: None,
+                            offset: None,
+                        },
+                    }
+                })
+                .context(StrContext::Label("date-time")),
+            partial_time
+                .map(|t| t.into())
+                .context(StrContext::Label("time")),
+        )),
+    )
+    .parse_next(input)
+}
+
+// full-date      = date-fullyear "-" date-month "-" date-mday
+pub(crate) fn full_date(input: &mut Input<'_>) -> PResult<Date> {
+    trace(
+        "full-date",
+        (date_fullyear, b'-', cut_err((date_month, b'-', date_mday)))
+            .map(|(year, _, (month, _, day))| Date { year, month, day }),
+    )
+    .parse_next(input)
+}
+
+// partial-time   = time-hour ":" time-minute ":" time-second [time-secfrac]
+pub(crate) fn partial_time(input: &mut Input<'_>) -> PResult<Time> {
+    trace(
+        "partial-time",
+        (
+            time_hour,
+            b':',
+            cut_err((time_minute, b':', time_second, opt(time_secfrac))),
+        )
+            .map(|(hour, _, (minute, _, second, nanosecond))| Time {
+                hour,
+                minute,
+                second,
+                nanosecond: nanosecond.unwrap_or_default(),
+            }),
+    )
+    .parse_next(input)
+}
+
+// time-offset    = "Z" / time-numoffset
+// time-numoffset = ( "+" / "-" ) time-hour ":" time-minute
+pub(crate) fn time_offset(input: &mut Input<'_>) -> PResult<Offset> {
+    trace(
+        "time-offset",
+        alt((
+            one_of((b'Z', b'z')).value(Offset::Z),
+            (
+                one_of((b'+', b'-')),
+                cut_err((time_hour, b':', time_minute)),
+            )
+                .map(|(sign, (hours, _, minutes))| {
+                    let sign = match sign {
+                        b'+' => 1,
+                        b'-' => -1,
+                        _ => unreachable!("Parser prevents this"),
+                    };
+                    sign * (hours as i16 * 60 + minutes as i16)
+                })
+                .verify(|minutes| ((-24 * 60)..=(24 * 60)).contains(minutes))
+                .map(|minutes| Offset::Custom { minutes }),
+        ))
+        .context(StrContext::Label("time offset")),
+    )
+    .parse_next(input)
+}
+
+// date-fullyear  = 4DIGIT
+pub(crate) fn date_fullyear(input: &mut Input<'_>) -> PResult<u16> {
+    unsigned_digits::<4, 4>
+        .map(|s: &str| s.parse::<u16>().expect("4DIGIT should match u8"))
+        .parse_next(input)
+}
+
+// date-month     = 2DIGIT  ; 01-12
+pub(crate) fn date_month(input: &mut Input<'_>) -> PResult<u8> {
+    unsigned_digits::<2, 2>
+        .try_map(|s: &str| {
+            let d = s.parse::<u8>().expect("2DIGIT should match u8");
+            if (1..=12).contains(&d) {
+                Ok(d)
+            } else {
+                Err(CustomError::OutOfRange)
+            }
+        })
+        .parse_next(input)
+}
+
+// date-mday      = 2DIGIT  ; 01-28, 01-29, 01-30, 01-31 based on month/year
+pub(crate) fn date_mday(input: &mut Input<'_>) -> PResult<u8> {
+    unsigned_digits::<2, 2>
+        .try_map(|s: &str| {
+            let d = s.parse::<u8>().expect("2DIGIT should match u8");
+            if (1..=31).contains(&d) {
+                Ok(d)
+            } else {
+                Err(CustomError::OutOfRange)
+            }
+        })
+        .parse_next(input)
+}
+
+// time-delim     = "T" / %x20 ; T, t, or space
+pub(crate) fn time_delim(input: &mut Input<'_>) -> PResult<u8> {
+    one_of(TIME_DELIM).parse_next(input)
+}
+
+const TIME_DELIM: (u8, u8, u8) = (b'T', b't', b' ');
+
+// time-hour      = 2DIGIT  ; 00-23
+pub(crate) fn time_hour(input: &mut Input<'_>) -> PResult<u8> {
+    unsigned_digits::<2, 2>
+        .try_map(|s: &str| {
+            let d = s.parse::<u8>().expect("2DIGIT should match u8");
+            if (0..=23).contains(&d) {
+                Ok(d)
+            } else {
+                Err(CustomError::OutOfRange)
+            }
+        })
+        .parse_next(input)
+}
+
+// time-minute    = 2DIGIT  ; 00-59
+pub(crate) fn time_minute(input: &mut Input<'_>) -> PResult<u8> {
+    unsigned_digits::<2, 2>
+        .try_map(|s: &str| {
+            let d = s.parse::<u8>().expect("2DIGIT should match u8");
+            if (0..=59).contains(&d) {
+                Ok(d)
+            } else {
+                Err(CustomError::OutOfRange)
+            }
+        })
+        .parse_next(input)
+}
+
+// time-second    = 2DIGIT  ; 00-58, 00-59, 00-60 based on leap second rules
+pub(crate) fn time_second(input: &mut Input<'_>) -> PResult<u8> {
+    unsigned_digits::<2, 2>
+        .try_map(|s: &str| {
+            let d = s.parse::<u8>().expect("2DIGIT should match u8");
+            if (0..=60).contains(&d) {
+                Ok(d)
+            } else {
+                Err(CustomError::OutOfRange)
+            }
+        })
+        .parse_next(input)
+}
+
+// time-secfrac   = "." 1*DIGIT
+pub(crate) fn time_secfrac(input: &mut Input<'_>) -> PResult<u32> {
+    static SCALE: [u32; 10] = [
+        0,
+        100_000_000,
+        10_000_000,
+        1_000_000,
+        100_000,
+        10_000,
+        1_000,
+        100,
+        10,
+        1,
+    ];
+    const INF: usize = usize::MAX;
+    preceded(b'.', unsigned_digits::<1, INF>)
+        .try_map(|mut repr: &str| -> Result<u32, CustomError> {
+            let max_digits = SCALE.len() - 1;
+            if max_digits < repr.len() {
+                // Millisecond precision is required. Further precision of fractional seconds is
+                // implementation-specific. If the value contains greater precision than the
+                // implementation can support, the additional precision must be truncated, not rounded.
+                repr = &repr[0..max_digits];
+            }
+
+            let v = repr.parse::<u32>().map_err(|_| CustomError::OutOfRange)?;
+            let num_digits = repr.len();
+
+            // scale the number accordingly.
+            let scale = SCALE.get(num_digits).ok_or(CustomError::OutOfRange)?;
+            let v = v.checked_mul(*scale).ok_or(CustomError::OutOfRange)?;
+            Ok(v)
+        })
+        .parse_next(input)
+}
+
+pub(crate) fn unsigned_digits<'i, const MIN: usize, const MAX: usize>(
+    input: &mut Input<'i>,
+) -> PResult<&'i str> {
+    take_while(MIN..=MAX, DIGIT)
+        .map(|b: &[u8]| unsafe { from_utf8_unchecked(b, "`is_ascii_digit` filters out on-ASCII") })
+        .parse_next(input)
+}
+
+// DIGIT = %x30-39 ; 0-9
+const DIGIT: RangeInclusive<u8> = b'0'..=b'9';
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn offset_date_time() {
+        let inputs = [
+            (
+                "1979-05-27T07:32:00Z",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 7,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 0,
+                    }),
+                    offset: Some(Offset::Z),
+                },
+            ),
+            (
+                "1979-05-27T00:32:00-07:00",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 0,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 0,
+                    }),
+                    offset: Some(Offset::Custom { minutes: -7 * 60 }),
+                },
+            ),
+            (
+                "1979-05-27T00:32:00-00:36",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 0,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 0,
+                    }),
+                    offset: Some(Offset::Custom { minutes: -36 }),
+                },
+            ),
+            (
+                "1979-05-27T00:32:00.999999",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 0,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 999999000,
+                    }),
+                    offset: None,
+                },
+            ),
+        ];
+        for (input, expected) in inputs {
+            dbg!(input);
+            let actual = date_time.parse(new_input(input)).unwrap();
+            assert_eq!(expected, actual);
+        }
+    }
+
+    #[test]
+    fn local_date_time() {
+        let inputs = [
+            (
+                "1979-05-27T07:32:00",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 7,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 0,
+                    }),
+                    offset: None,
+                },
+            ),
+            (
+                "1979-05-27T00:32:00.999999",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: Some(Time {
+                        hour: 0,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 999999000,
+                    }),
+                    offset: None,
+                },
+            ),
+        ];
+        for (input, expected) in inputs {
+            dbg!(input);
+            let actual = date_time.parse(new_input(input)).unwrap();
+            assert_eq!(expected, actual);
+        }
+    }
+
+    #[test]
+    fn local_date() {
+        let inputs = [
+            (
+                "1979-05-27",
+                Datetime {
+                    date: Some(Date {
+                        year: 1979,
+                        month: 5,
+                        day: 27,
+                    }),
+                    time: None,
+                    offset: None,
+                },
+            ),
+            (
+                "2017-07-20",
+                Datetime {
+                    date: Some(Date {
+                        year: 2017,
+                        month: 7,
+                        day: 20,
+                    }),
+                    time: None,
+                    offset: None,
+                },
+            ),
+        ];
+        for (input, expected) in inputs {
+            dbg!(input);
+            let actual = date_time.parse(new_input(input)).unwrap();
+            assert_eq!(expected, actual);
+        }
+    }
+
+    #[test]
+    fn local_time() {
+        let inputs = [
+            (
+                "07:32:00",
+                Datetime {
+                    date: None,
+                    time: Some(Time {
+                        hour: 7,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 0,
+                    }),
+                    offset: None,
+                },
+            ),
+            (
+                "00:32:00.999999",
+                Datetime {
+                    date: None,
+                    time: Some(Time {
+                        hour: 0,
+                        minute: 32,
+                        second: 0,
+                        nanosecond: 999999000,
+                    }),
+                    offset: None,
+                },
+            ),
+        ];
+        for (input, expected) in inputs {
+            dbg!(input);
+            let actual = date_time.parse(new_input(input)).unwrap();
+            assert_eq!(expected, actual);
+        }
+    }
+
+    #[test]
+    fn time_fraction_truncated() {
+        let input = "1987-07-05T17:45:00.123456789012345Z";
+        date_time.parse(new_input(input)).unwrap();
+    }
+}

third-party/vendor/toml_edit/src/parser/document.rs

@@ -0,0 +1,141 @@
+use std::cell::RefCell;
+
+use winnow::combinator::cut_err;
+use winnow::combinator::eof;
+use winnow::combinator::opt;
+use winnow::combinator::peek;
+use winnow::combinator::repeat;
+use winnow::token::any;
+use winnow::token::one_of;
+use winnow::trace::trace;
+
+use crate::document::Document;
+use crate::key::Key;
+use crate::parser::inline_table::KEYVAL_SEP;
+use crate::parser::key::key;
+use crate::parser::prelude::*;
+use crate::parser::state::ParseState;
+use crate::parser::table::table;
+use crate::parser::trivia::{comment, line_ending, line_trailing, newline, ws};
+use crate::parser::value::value;
+use crate::table::TableKeyValue;
+use crate::Item;
+use crate::RawString;
+
+// ;; TOML
+
+// toml = expression *( newline expression )
+
+// expression = ( ( ws comment ) /
+//                ( ws keyval ws [ comment ] ) /
+//                ( ws table ws [ comment ] ) /
+//                  ws )
+pub(crate) fn document(input: &mut Input<'_>) -> PResult<Document> {
+    let state = RefCell::new(ParseState::default());
+    let state_ref = &state;
+
+    let _o = (
+        // Remove BOM if present
+        opt(b"\xEF\xBB\xBF"),
+        parse_ws(state_ref),
+        repeat(0.., (
+            dispatch! {peek(any);
+                crate::parser::trivia::COMMENT_START_SYMBOL => cut_err(parse_comment(state_ref)),
+                crate::parser::table::STD_TABLE_OPEN => cut_err(table(state_ref)),
+                crate::parser::trivia::LF |
+                crate::parser::trivia::CR => parse_newline(state_ref),
+                _ => cut_err(keyval(state_ref)),
+            },
+            parse_ws(state_ref),
+        ))
+        .map(|()| ()),
+        eof,
+    )
+        .parse_next(input)?;
+    state.into_inner().into_document().map_err(|err| {
+        winnow::error::ErrMode::from_external_error(input, winnow::error::ErrorKind::Verify, err)
+    })
+}
+
+pub(crate) fn parse_comment<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        (comment, line_ending)
+            .span()
+            .map(|span| {
+                state.borrow_mut().on_comment(span);
+            })
+            .parse_next(i)
+    }
+}
+
+pub(crate) fn parse_ws<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        ws.span()
+            .map(|span| state.borrow_mut().on_ws(span))
+            .parse_next(i)
+    }
+}
+
+pub(crate) fn parse_newline<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        newline
+            .span()
+            .map(|span| state.borrow_mut().on_ws(span))
+            .parse_next(i)
+    }
+}
+
+pub(crate) fn keyval<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        parse_keyval
+            .try_map(|(p, kv)| state.borrow_mut().on_keyval(p, kv))
+            .parse_next(i)
+    }
+}
+
+// keyval = key keyval-sep val
+pub(crate) fn parse_keyval(input: &mut Input<'_>) -> PResult<(Vec<Key>, TableKeyValue)> {
+    trace(
+        "keyval",
+        (
+            key,
+            cut_err((
+                one_of(KEYVAL_SEP)
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('.')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('='))),
+                (
+                    ws.span(),
+                    value(RecursionCheck::default()),
+                    line_trailing
+                        .context(StrContext::Expected(StrContextValue::CharLiteral('\n')))
+                        .context(StrContext::Expected(StrContextValue::CharLiteral('#'))),
+                ),
+            )),
+        )
+            .try_map::<_, _, std::str::Utf8Error>(|(key, (_, v))| {
+                let mut path = key;
+                let key = path.pop().expect("grammar ensures at least 1");
+
+                let (pre, v, suf) = v;
+                let pre = RawString::with_span(pre);
+                let suf = RawString::with_span(suf);
+                let v = v.decorated(pre, suf);
+                Ok((
+                    path,
+                    TableKeyValue {
+                        key,
+                        value: Item::Value(v),
+                    },
+                ))
+            }),
+    )
+    .parse_next(input)
+}

third-party/vendor/toml_edit/src/parser/errors.rs

@@ -0,0 +1,316 @@
+use std::error::Error as StdError;
+use std::fmt::{Display, Formatter, Result};
+
+use crate::parser::prelude::*;
+use crate::Key;
+
+use winnow::error::ContextError;
+use winnow::error::ParseError;
+
+/// Type representing a TOML parse error
+#[derive(Debug, Clone, Eq, PartialEq, Hash)]
+pub struct TomlError {
+    message: String,
+    original: Option<String>,
+    keys: Vec<String>,
+    span: Option<std::ops::Range<usize>>,
+}
+
+impl TomlError {
+    pub(crate) fn new(error: ParseError<Input<'_>, ContextError>, mut original: Input<'_>) -> Self {
+        use winnow::stream::Stream;
+
+        let offset = error.offset();
+        let span = if offset == original.len() {
+            offset..offset
+        } else {
+            offset..(offset + 1)
+        };
+
+        let message = error.inner().to_string();
+        let original = original.finish();
+
+        Self {
+            message,
+            original: Some(
+                String::from_utf8(original.to_owned()).expect("original document was utf8"),
+            ),
+            keys: Vec::new(),
+            span: Some(span),
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    pub(crate) fn custom(message: String, span: Option<std::ops::Range<usize>>) -> Self {
+        Self {
+            message,
+            original: None,
+            keys: Vec::new(),
+            span,
+        }
+    }
+
+    #[cfg(feature = "serde")]
+    pub(crate) fn add_key(&mut self, key: String) {
+        self.keys.insert(0, key);
+    }
+
+    /// What went wrong
+    pub fn message(&self) -> &str {
+        &self.message
+    }
+
+    /// The start/end index into the original document where the error occurred
+    pub fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.span.clone()
+    }
+
+    #[cfg(feature = "serde")]
+    pub(crate) fn set_span(&mut self, span: Option<std::ops::Range<usize>>) {
+        self.span = span;
+    }
+
+    #[cfg(feature = "serde")]
+    pub(crate) fn set_original(&mut self, original: Option<String>) {
+        self.original = original;
+    }
+}
+
+/// Displays a TOML parse error
+///
+/// # Example
+///
+/// TOML parse error at line 1, column 10
+///   |
+/// 1 | 00:32:00.a999999
+///   |          ^
+/// Unexpected `a`
+/// Expected `digit`
+/// While parsing a Time
+/// While parsing a Date-Time
+impl Display for TomlError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        let mut context = false;
+        if let (Some(original), Some(span)) = (&self.original, self.span()) {
+            context = true;
+
+            let (line, column) = translate_position(original.as_bytes(), span.start);
+            let line_num = line + 1;
+            let col_num = column + 1;
+            let gutter = line_num.to_string().len();
+            let content = original.split('\n').nth(line).expect("valid line number");
+
+            writeln!(
+                f,
+                "TOML parse error at line {}, column {}",
+                line_num, col_num
+            )?;
+            //   |
+            for _ in 0..=gutter {
+                write!(f, " ")?;
+            }
+            writeln!(f, "|")?;
+
+            // 1 | 00:32:00.a999999
+            write!(f, "{} | ", line_num)?;
+            writeln!(f, "{}", content)?;
+
+            //   |          ^
+            for _ in 0..=gutter {
+                write!(f, " ")?;
+            }
+            write!(f, "|")?;
+            for _ in 0..=column {
+                write!(f, " ")?;
+            }
+            // The span will be empty at eof, so we need to make sure we always print at least
+            // one `^`
+            write!(f, "^")?;
+            for _ in (span.start + 1)..(span.end.min(span.start + content.len())) {
+                write!(f, "^")?;
+            }
+            writeln!(f)?;
+        }
+        writeln!(f, "{}", self.message)?;
+        if !context && !self.keys.is_empty() {
+            writeln!(f, "in `{}`", self.keys.join("."))?;
+        }
+
+        Ok(())
+    }
+}
+
+impl StdError for TomlError {
+    fn description(&self) -> &'static str {
+        "TOML parse error"
+    }
+}
+
+fn translate_position(input: &[u8], index: usize) -> (usize, usize) {
+    if input.is_empty() {
+        return (0, index);
+    }
+
+    let safe_index = index.min(input.len() - 1);
+    let column_offset = index - safe_index;
+    let index = safe_index;
+
+    let nl = input[0..index]
+        .iter()
+        .rev()
+        .enumerate()
+        .find(|(_, b)| **b == b'\n')
+        .map(|(nl, _)| index - nl - 1);
+    let line_start = match nl {
+        Some(nl) => nl + 1,
+        None => 0,
+    };
+    let line = input[0..line_start].iter().filter(|b| **b == b'\n').count();
+    let line = line;
+
+    let column = std::str::from_utf8(&input[line_start..=index])
+        .map(|s| s.chars().count() - 1)
+        .unwrap_or_else(|_| index - line_start);
+    let column = column + column_offset;
+
+    (line, column)
+}
+
+#[cfg(test)]
+mod test_translate_position {
+    use super::*;
+
+    #[test]
+    fn empty() {
+        let input = b"";
+        let index = 0;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, 0));
+    }
+
+    #[test]
+    fn start() {
+        let input = b"Hello";
+        let index = 0;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, 0));
+    }
+
+    #[test]
+    fn end() {
+        let input = b"Hello";
+        let index = input.len() - 1;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, input.len() - 1));
+    }
+
+    #[test]
+    fn after() {
+        let input = b"Hello";
+        let index = input.len();
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, input.len()));
+    }
+
+    #[test]
+    fn first_line() {
+        let input = b"Hello\nWorld\n";
+        let index = 2;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, 2));
+    }
+
+    #[test]
+    fn end_of_line() {
+        let input = b"Hello\nWorld\n";
+        let index = 5;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (0, 5));
+    }
+
+    #[test]
+    fn start_of_second_line() {
+        let input = b"Hello\nWorld\n";
+        let index = 6;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (1, 0));
+    }
+
+    #[test]
+    fn second_line() {
+        let input = b"Hello\nWorld\n";
+        let index = 8;
+        let position = translate_position(&input[..], index);
+        assert_eq!(position, (1, 2));
+    }
+}
+
+#[derive(Debug, Clone)]
+pub(crate) enum CustomError {
+    DuplicateKey {
+        key: String,
+        table: Option<Vec<Key>>,
+    },
+    DottedKeyExtendWrongType {
+        key: Vec<Key>,
+        actual: &'static str,
+    },
+    OutOfRange,
+    #[cfg_attr(feature = "unbounded", allow(dead_code))]
+    RecursionLimitExceeded,
+}
+
+impl CustomError {
+    pub(crate) fn duplicate_key(path: &[Key], i: usize) -> Self {
+        assert!(i < path.len());
+        let key = &path[i];
+        let repr = key.display_repr();
+        Self::DuplicateKey {
+            key: repr.into(),
+            table: Some(path[..i].to_vec()),
+        }
+    }
+
+    pub(crate) fn extend_wrong_type(path: &[Key], i: usize, actual: &'static str) -> Self {
+        assert!(i < path.len());
+        Self::DottedKeyExtendWrongType {
+            key: path[..=i].to_vec(),
+            actual,
+        }
+    }
+}
+
+impl StdError for CustomError {
+    fn description(&self) -> &'static str {
+        "TOML parse error"
+    }
+}
+
+impl Display for CustomError {
+    fn fmt(&self, f: &mut Formatter<'_>) -> Result {
+        match self {
+            CustomError::DuplicateKey { key, table } => {
+                if let Some(table) = table {
+                    if table.is_empty() {
+                        write!(f, "duplicate key `{}` in document root", key)
+                    } else {
+                        let path = table.iter().map(|k| k.get()).collect::<Vec<_>>().join(".");
+                        write!(f, "duplicate key `{}` in table `{}`", key, path)
+                    }
+                } else {
+                    write!(f, "duplicate key `{}`", key)
+                }
+            }
+            CustomError::DottedKeyExtendWrongType { key, actual } => {
+                let path = key.iter().map(|k| k.get()).collect::<Vec<_>>().join(".");
+                write!(
+                    f,
+                    "dotted key `{}` attempted to extend non-table type ({})",
+                    path, actual
+                )
+            }
+            CustomError::OutOfRange => write!(f, "value is out of range"),
+            CustomError::RecursionLimitExceeded => write!(f, "recursion limit exceeded"),
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/inline_table.rs

@@ -0,0 +1,181 @@
+use winnow::combinator::cut_err;
+use winnow::combinator::delimited;
+use winnow::combinator::separated0;
+use winnow::token::one_of;
+use winnow::trace::trace;
+
+use crate::key::Key;
+use crate::parser::errors::CustomError;
+use crate::parser::key::key;
+use crate::parser::prelude::*;
+use crate::parser::trivia::ws;
+use crate::parser::value::value;
+use crate::table::TableKeyValue;
+use crate::{InlineTable, InternalString, Item, RawString, Value};
+
+use indexmap::map::Entry;
+
+// ;; Inline Table
+
+// inline-table = inline-table-open inline-table-keyvals inline-table-close
+pub(crate) fn inline_table<'i>(
+    check: RecursionCheck,
+) -> impl Parser<Input<'i>, InlineTable, ContextError> {
+    trace("inline-table", move |input: &mut Input<'i>| {
+        delimited(
+            INLINE_TABLE_OPEN,
+            cut_err(inline_table_keyvals(check).try_map(|(kv, p)| table_from_pairs(kv, p))),
+            cut_err(INLINE_TABLE_CLOSE)
+                .context(StrContext::Label("inline table"))
+                .context(StrContext::Expected(StrContextValue::CharLiteral('}'))),
+        )
+        .parse_next(input)
+    })
+}
+
+fn table_from_pairs(
+    v: Vec<(Vec<Key>, TableKeyValue)>,
+    preamble: RawString,
+) -> Result<InlineTable, CustomError> {
+    let mut root = InlineTable::new();
+    root.set_preamble(preamble);
+    // Assuming almost all pairs will be directly in `root`
+    root.items.reserve(v.len());
+
+    for (path, kv) in v {
+        let table = descend_path(&mut root, &path)?;
+        let key: InternalString = kv.key.get_internal().into();
+        match table.items.entry(key) {
+            Entry::Vacant(o) => {
+                o.insert(kv);
+            }
+            Entry::Occupied(o) => {
+                return Err(CustomError::DuplicateKey {
+                    key: o.key().as_str().into(),
+                    table: None,
+                });
+            }
+        }
+    }
+    Ok(root)
+}
+
+fn descend_path<'a>(
+    mut table: &'a mut InlineTable,
+    path: &'a [Key],
+) -> Result<&'a mut InlineTable, CustomError> {
+    for (i, key) in path.iter().enumerate() {
+        let entry = table.entry_format(key).or_insert_with(|| {
+            let mut new_table = InlineTable::new();
+            new_table.set_dotted(true);
+
+            Value::InlineTable(new_table)
+        });
+        match *entry {
+            Value::InlineTable(ref mut sweet_child_of_mine) => {
+                table = sweet_child_of_mine;
+            }
+            ref v => {
+                return Err(CustomError::extend_wrong_type(path, i, v.type_name()));
+            }
+        }
+    }
+    Ok(table)
+}
+
+// inline-table-open  = %x7B ws     ; {
+pub(crate) const INLINE_TABLE_OPEN: u8 = b'{';
+// inline-table-close = ws %x7D     ; }
+const INLINE_TABLE_CLOSE: u8 = b'}';
+// inline-table-sep   = ws %x2C ws  ; , Comma
+const INLINE_TABLE_SEP: u8 = b',';
+// keyval-sep = ws %x3D ws ; =
+pub(crate) const KEYVAL_SEP: u8 = b'=';
+
+// inline-table-keyvals = [ inline-table-keyvals-non-empty ]
+// inline-table-keyvals-non-empty =
+// ( key keyval-sep val inline-table-sep inline-table-keyvals-non-empty ) /
+// ( key keyval-sep val )
+
+fn inline_table_keyvals<'i>(
+    check: RecursionCheck,
+) -> impl Parser<Input<'i>, (Vec<(Vec<Key>, TableKeyValue)>, RawString), ContextError> {
+    move |input: &mut Input<'i>| {
+        let check = check.recursing(input)?;
+        (
+            separated0(keyval(check), INLINE_TABLE_SEP),
+            ws.span().map(RawString::with_span),
+        )
+            .parse_next(input)
+    }
+}
+
+fn keyval<'i>(
+    check: RecursionCheck,
+) -> impl Parser<Input<'i>, (Vec<Key>, TableKeyValue), ContextError> {
+    move |input: &mut Input<'i>| {
+        (
+            key,
+            cut_err((
+                one_of(KEYVAL_SEP)
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('.')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('='))),
+                (ws.span(), value(check), ws.span()),
+            )),
+        )
+            .map(|(key, (_, v))| {
+                let mut path = key;
+                let key = path.pop().expect("grammar ensures at least 1");
+
+                let (pre, v, suf) = v;
+                let pre = RawString::with_span(pre);
+                let suf = RawString::with_span(suf);
+                let v = v.decorated(pre, suf);
+                (
+                    path,
+                    TableKeyValue {
+                        key,
+                        value: Item::Value(v),
+                    },
+                )
+            })
+            .parse_next(input)
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn inline_tables() {
+        let inputs = [
+            r#"{}"#,
+            r#"{   }"#,
+            r#"{a = 1e165}"#,
+            r#"{ hello = "world", a = 1}"#,
+            r#"{ hello.world = "a" }"#,
+        ];
+        for input in inputs {
+            dbg!(input);
+            let mut parsed = inline_table(Default::default()).parse(new_input(input));
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan(input);
+            }
+            assert_eq!(parsed.map(|a| a.to_string()), Ok(input.to_owned()));
+        }
+    }
+
+    #[test]
+    fn invalid_inline_tables() {
+        let invalid_inputs = [r#"{a = 1e165"#, r#"{ hello = "world", a = 2, hello = 1}"#];
+        for input in invalid_inputs {
+            dbg!(input);
+            let mut parsed = inline_table(Default::default()).parse(new_input(input));
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan(input);
+            }
+            assert!(parsed.is_err());
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/key.rs

@@ -0,0 +1,112 @@
+use std::ops::RangeInclusive;
+
+use winnow::combinator::peek;
+use winnow::combinator::separated1;
+use winnow::token::any;
+use winnow::token::take_while;
+use winnow::trace::trace;
+
+use crate::key::Key;
+use crate::parser::errors::CustomError;
+use crate::parser::prelude::*;
+use crate::parser::strings::{basic_string, literal_string};
+use crate::parser::trivia::{from_utf8_unchecked, ws};
+use crate::repr::{Decor, Repr};
+use crate::InternalString;
+use crate::RawString;
+
+// key = simple-key / dotted-key
+// dotted-key = simple-key 1*( dot-sep simple-key )
+pub(crate) fn key(input: &mut Input<'_>) -> PResult<Vec<Key>> {
+    trace(
+        "dotted-key",
+        separated1(
+            (ws.span(), simple_key, ws.span()).map(|(pre, (raw, key), suffix)| {
+                Key::new(key)
+                    .with_repr_unchecked(Repr::new_unchecked(raw))
+                    .with_decor(Decor::new(
+                        RawString::with_span(pre),
+                        RawString::with_span(suffix),
+                    ))
+            }),
+            DOT_SEP,
+        )
+        .context(StrContext::Label("key"))
+        .try_map(|k: Vec<_>| {
+            // Inserting the key will require recursion down the line
+            RecursionCheck::check_depth(k.len())?;
+            Ok::<_, CustomError>(k)
+        }),
+    )
+    .parse_next(input)
+}
+
+// simple-key = quoted-key / unquoted-key
+// quoted-key = basic-string / literal-string
+pub(crate) fn simple_key(input: &mut Input<'_>) -> PResult<(RawString, InternalString)> {
+    trace(
+        "simple-key",
+        dispatch! {peek(any);
+            crate::parser::strings::QUOTATION_MARK => basic_string
+                .map(|s: std::borrow::Cow<'_, str>| s.as_ref().into()),
+            crate::parser::strings::APOSTROPHE => literal_string.map(|s: &str| s.into()),
+            _ => unquoted_key.map(|s: &str| s.into()),
+        }
+        .with_span()
+        .map(|(k, span)| {
+            let raw = RawString::with_span(span);
+            (raw, k)
+        }),
+    )
+    .parse_next(input)
+}
+
+// unquoted-key = 1*( ALPHA / DIGIT / %x2D / %x5F ) ; A-Z / a-z / 0-9 / - / _
+fn unquoted_key<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "unquoted-key",
+        take_while(1.., UNQUOTED_CHAR)
+            .map(|b| unsafe { from_utf8_unchecked(b, "`is_unquoted_char` filters out on-ASCII") }),
+    )
+    .parse_next(input)
+}
+
+pub(crate) fn is_unquoted_char(c: u8) -> bool {
+    use winnow::stream::ContainsToken;
+    UNQUOTED_CHAR.contains_token(c)
+}
+
+const UNQUOTED_CHAR: (
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    u8,
+    u8,
+) = (b'A'..=b'Z', b'a'..=b'z', b'0'..=b'9', b'-', b'_');
+
+// dot-sep   = ws %x2E ws  ; . Period
+const DOT_SEP: u8 = b'.';
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn keys() {
+        let cases = [
+            ("a", "a"),
+            (r#""hello\n ""#, "hello\n "),
+            (r#"'hello\n '"#, "hello\\n "),
+        ];
+
+        for (input, expected) in cases {
+            dbg!(input);
+            let parsed = simple_key.parse(new_input(input));
+            assert_eq!(
+                parsed,
+                Ok((RawString::with_span(0..(input.len())), expected.into())),
+                "Parsing {input:?}"
+            );
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/mod.rs

@@ -0,0 +1,265 @@
+#![allow(clippy::type_complexity)]
+
+pub(crate) mod array;
+pub(crate) mod datetime;
+pub(crate) mod document;
+pub(crate) mod errors;
+pub(crate) mod inline_table;
+pub(crate) mod key;
+pub(crate) mod numbers;
+pub(crate) mod state;
+pub(crate) mod strings;
+pub(crate) mod table;
+pub(crate) mod trivia;
+pub(crate) mod value;
+
+pub use errors::TomlError;
+
+pub(crate) fn parse_document(raw: &str) -> Result<crate::Document, TomlError> {
+    use prelude::*;
+
+    let b = new_input(raw);
+    let mut doc = document::document
+        .parse(b)
+        .map_err(|e| TomlError::new(e, b))?;
+    doc.span = Some(0..(raw.len()));
+    doc.original = Some(raw.to_owned());
+    Ok(doc)
+}
+
+pub(crate) fn parse_key(raw: &str) -> Result<crate::Key, TomlError> {
+    use prelude::*;
+
+    let b = new_input(raw);
+    let result = key::simple_key.parse(b);
+    match result {
+        Ok((raw, key)) => {
+            Ok(crate::Key::new(key).with_repr_unchecked(crate::Repr::new_unchecked(raw)))
+        }
+        Err(e) => Err(TomlError::new(e, b)),
+    }
+}
+
+pub(crate) fn parse_key_path(raw: &str) -> Result<Vec<crate::Key>, TomlError> {
+    use prelude::*;
+
+    let b = new_input(raw);
+    let result = key::key.parse(b);
+    match result {
+        Ok(mut keys) => {
+            for key in &mut keys {
+                key.despan(raw);
+            }
+            Ok(keys)
+        }
+        Err(e) => Err(TomlError::new(e, b)),
+    }
+}
+
+pub(crate) fn parse_value(raw: &str) -> Result<crate::Value, TomlError> {
+    use prelude::*;
+
+    let b = new_input(raw);
+    let parsed = value::value(RecursionCheck::default()).parse(b);
+    match parsed {
+        Ok(mut value) => {
+            // Only take the repr and not decor, as its probably not intended
+            value.decor_mut().clear();
+            value.despan(raw);
+            Ok(value)
+        }
+        Err(e) => Err(TomlError::new(e, b)),
+    }
+}
+
+pub(crate) mod prelude {
+    pub(crate) use winnow::combinator::dispatch;
+    pub(crate) use winnow::error::ContextError;
+    pub(crate) use winnow::error::FromExternalError;
+    pub(crate) use winnow::error::StrContext;
+    pub(crate) use winnow::error::StrContextValue;
+    pub(crate) use winnow::PResult;
+    pub(crate) use winnow::Parser;
+
+    pub(crate) type Input<'b> = winnow::Located<&'b winnow::BStr>;
+
+    pub(crate) fn new_input(s: &str) -> Input<'_> {
+        winnow::Located::new(winnow::BStr::new(s))
+    }
+
+    #[cfg(not(feature = "unbounded"))]
+    #[derive(Copy, Clone, Debug, Default)]
+    pub(crate) struct RecursionCheck {
+        current: usize,
+    }
+
+    #[cfg(not(feature = "unbounded"))]
+    impl RecursionCheck {
+        pub(crate) fn check_depth(depth: usize) -> Result<(), super::errors::CustomError> {
+            if depth < 128 {
+                Ok(())
+            } else {
+                Err(super::errors::CustomError::RecursionLimitExceeded)
+            }
+        }
+
+        pub(crate) fn recursing(
+            mut self,
+            input: &mut Input<'_>,
+        ) -> Result<Self, winnow::error::ErrMode<ContextError>> {
+            self.current += 1;
+            if self.current < 128 {
+                Ok(self)
+            } else {
+                Err(winnow::error::ErrMode::from_external_error(
+                    input,
+                    winnow::error::ErrorKind::Eof,
+                    super::errors::CustomError::RecursionLimitExceeded,
+                ))
+            }
+        }
+    }
+
+    #[cfg(feature = "unbounded")]
+    #[derive(Copy, Clone, Debug, Default)]
+    pub(crate) struct RecursionCheck {}
+
+    #[cfg(feature = "unbounded")]
+    impl RecursionCheck {
+        pub(crate) fn check_depth(_depth: usize) -> Result<(), super::errors::CustomError> {
+            Ok(())
+        }
+
+        pub(crate) fn recursing(
+            self,
+            _input: &mut Input<'_>,
+        ) -> Result<Self, winnow::error::ErrMode<ContextError>> {
+            Ok(self)
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn documents() {
+        let documents = [
+            "",
+            r#"
+# This is a TOML document.
+
+title = "TOML Example"
+
+    [owner]
+    name = "Tom Preston-Werner"
+    dob = 1979-05-27T07:32:00-08:00 # First class dates
+
+    [database]
+    server = "192.168.1.1"
+    ports = [ 8001, 8001, 8002 ]
+    connection_max = 5000
+    enabled = true
+
+    [servers]
+
+    # Indentation (tabs and/or spaces) is allowed but not required
+[servers.alpha]
+    ip = "10.0.0.1"
+    dc = "eqdc10"
+
+    [servers.beta]
+    ip = "10.0.0.2"
+    dc = "eqdc10"
+
+    [clients]
+    data = [ ["gamma", "delta"], [1, 2] ]
+
+    # Line breaks are OK when inside arrays
+hosts = [
+    "alpha",
+    "omega"
+]
+
+   'some.weird .stuff'   =  """
+                         like
+                         that
+                      #   """ # this broke my syntax highlighting
+   " also. like " = '''
+that
+'''
+   double = 2e39 # this number looks familiar
+# trailing comment"#,
+            r#""#,
+            r#"  "#,
+            r#" hello = 'darkness' # my old friend
+"#,
+            r#"[parent . child]
+key = "value"
+"#,
+            r#"hello.world = "a"
+"#,
+            r#"foo = 1979-05-27 # Comment
+"#,
+        ];
+        for input in documents {
+            dbg!(input);
+            let mut parsed = parse_document(input);
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan();
+            }
+            let doc = match parsed {
+                Ok(doc) => doc,
+                Err(err) => {
+                    panic!(
+                        "Parse error: {:?}\nFailed to parse:\n```\n{}\n```",
+                        err, input
+                    )
+                }
+            };
+
+            snapbox::assert_eq(input, doc.to_string());
+        }
+    }
+
+    #[test]
+    fn documents_parse_only() {
+        let parse_only = ["\u{FEFF}
+[package]
+name = \"foo\"
+version = \"0.0.1\"
+authors = []
+"];
+        for input in parse_only {
+            dbg!(input);
+            let mut parsed = parse_document(input);
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan();
+            }
+            match parsed {
+                Ok(_) => (),
+                Err(err) => {
+                    panic!(
+                        "Parse error: {:?}\nFailed to parse:\n```\n{}\n```",
+                        err, input
+                    )
+                }
+            }
+        }
+    }
+
+    #[test]
+    fn invalid_documents() {
+        let invalid_inputs = [r#" hello = 'darkness' # my old friend
+$"#];
+        for input in invalid_inputs {
+            dbg!(input);
+            let mut parsed = parse_document(input);
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan();
+            }
+            assert!(parsed.is_err(), "Input: {:?}", input);
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/numbers.rs

@@ -0,0 +1,397 @@
+use std::ops::RangeInclusive;
+
+use winnow::combinator::alt;
+use winnow::combinator::cut_err;
+use winnow::combinator::opt;
+use winnow::combinator::peek;
+use winnow::combinator::preceded;
+use winnow::combinator::repeat;
+use winnow::combinator::rest;
+use winnow::token::one_of;
+use winnow::token::tag;
+use winnow::token::take;
+use winnow::trace::trace;
+
+use crate::parser::prelude::*;
+use crate::parser::trivia::from_utf8_unchecked;
+
+// ;; Boolean
+
+// boolean = true / false
+#[allow(dead_code)] // directly define in `fn value`
+pub(crate) fn boolean(input: &mut Input<'_>) -> PResult<bool> {
+    trace("boolean", alt((true_, false_))).parse_next(input)
+}
+
+pub(crate) fn true_(input: &mut Input<'_>) -> PResult<bool> {
+    (peek(TRUE[0]), cut_err(TRUE)).value(true).parse_next(input)
+}
+const TRUE: &[u8] = b"true";
+
+pub(crate) fn false_(input: &mut Input<'_>) -> PResult<bool> {
+    (peek(FALSE[0]), cut_err(FALSE))
+        .value(false)
+        .parse_next(input)
+}
+const FALSE: &[u8] = b"false";
+
+// ;; Integer
+
+// integer = dec-int / hex-int / oct-int / bin-int
+pub(crate) fn integer(input: &mut Input<'_>) -> PResult<i64> {
+    trace("integer",
+    dispatch! {peek(opt::<_, &[u8], _, _>(take(2usize)));
+        Some(b"0x") => cut_err(hex_int.try_map(|s| i64::from_str_radix(&s.replace('_', ""), 16))),
+        Some(b"0o") => cut_err(oct_int.try_map(|s| i64::from_str_radix(&s.replace('_', ""), 8))),
+        Some(b"0b") => cut_err(bin_int.try_map(|s| i64::from_str_radix(&s.replace('_', ""), 2))),
+        _ => dec_int.and_then(cut_err(rest
+            .try_map(|s: &str| s.replace('_', "").parse())))
+    })
+    .parse_next(input)
+}
+
+// dec-int = [ minus / plus ] unsigned-dec-int
+// unsigned-dec-int = DIGIT / digit1-9 1*( DIGIT / underscore DIGIT )
+pub(crate) fn dec_int<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "dec-int",
+        (
+            opt(one_of((b'+', b'-'))),
+            alt((
+                (
+                    one_of(DIGIT1_9),
+                    repeat(
+                        0..,
+                        alt((
+                            digit.value(()),
+                            (
+                                one_of(b'_'),
+                                cut_err(digit).context(StrContext::Expected(
+                                    StrContextValue::Description("digit"),
+                                )),
+                            )
+                                .value(()),
+                        )),
+                    )
+                    .map(|()| ()),
+                )
+                    .value(()),
+                digit.value(()),
+            )),
+        )
+            .recognize()
+            .map(|b: &[u8]| unsafe {
+                from_utf8_unchecked(b, "`digit` and `_` filter out non-ASCII")
+            })
+            .context(StrContext::Label("integer")),
+    )
+    .parse_next(input)
+}
+const DIGIT1_9: RangeInclusive<u8> = b'1'..=b'9';
+
+// hex-prefix = %x30.78               ; 0x
+// hex-int = hex-prefix HEXDIG *( HEXDIG / underscore HEXDIG )
+pub(crate) fn hex_int<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "hex-int",
+        preceded(
+            HEX_PREFIX,
+            cut_err((
+                hexdig,
+                repeat(
+                    0..,
+                    alt((
+                        hexdig.value(()),
+                        (
+                            one_of(b'_'),
+                            cut_err(hexdig).context(StrContext::Expected(
+                                StrContextValue::Description("digit"),
+                            )),
+                        )
+                            .value(()),
+                    )),
+                )
+                .map(|()| ()),
+            ))
+            .recognize(),
+        )
+        .map(|b| unsafe { from_utf8_unchecked(b, "`hexdig` and `_` filter out non-ASCII") })
+        .context(StrContext::Label("hexadecimal integer")),
+    )
+    .parse_next(input)
+}
+const HEX_PREFIX: &[u8] = b"0x";
+
+// oct-prefix = %x30.6F               ; 0o
+// oct-int = oct-prefix digit0-7 *( digit0-7 / underscore digit0-7 )
+pub(crate) fn oct_int<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "oct-int",
+        preceded(
+            OCT_PREFIX,
+            cut_err((
+                one_of(DIGIT0_7),
+                repeat(
+                    0..,
+                    alt((
+                        one_of(DIGIT0_7).value(()),
+                        (
+                            one_of(b'_'),
+                            cut_err(one_of(DIGIT0_7)).context(StrContext::Expected(
+                                StrContextValue::Description("digit"),
+                            )),
+                        )
+                            .value(()),
+                    )),
+                )
+                .map(|()| ()),
+            ))
+            .recognize(),
+        )
+        .map(|b| unsafe { from_utf8_unchecked(b, "`DIGIT0_7` and `_` filter out non-ASCII") })
+        .context(StrContext::Label("octal integer")),
+    )
+    .parse_next(input)
+}
+const OCT_PREFIX: &[u8] = b"0o";
+const DIGIT0_7: RangeInclusive<u8> = b'0'..=b'7';
+
+// bin-prefix = %x30.62               ; 0b
+// bin-int = bin-prefix digit0-1 *( digit0-1 / underscore digit0-1 )
+pub(crate) fn bin_int<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "bin-int",
+        preceded(
+            BIN_PREFIX,
+            cut_err((
+                one_of(DIGIT0_1),
+                repeat(
+                    0..,
+                    alt((
+                        one_of(DIGIT0_1).value(()),
+                        (
+                            one_of(b'_'),
+                            cut_err(one_of(DIGIT0_1)).context(StrContext::Expected(
+                                StrContextValue::Description("digit"),
+                            )),
+                        )
+                            .value(()),
+                    )),
+                )
+                .map(|()| ()),
+            ))
+            .recognize(),
+        )
+        .map(|b| unsafe { from_utf8_unchecked(b, "`DIGIT0_1` and `_` filter out non-ASCII") })
+        .context(StrContext::Label("binary integer")),
+    )
+    .parse_next(input)
+}
+const BIN_PREFIX: &[u8] = b"0b";
+const DIGIT0_1: RangeInclusive<u8> = b'0'..=b'1';
+
+// ;; Float
+
+// float = float-int-part ( exp / frac [ exp ] )
+// float =/ special-float
+// float-int-part = dec-int
+pub(crate) fn float(input: &mut Input<'_>) -> PResult<f64> {
+    trace(
+        "float",
+        alt((
+            float_.and_then(cut_err(
+                rest.try_map(|s: &str| s.replace('_', "").parse())
+                    .verify(|f: &f64| *f != f64::INFINITY),
+            )),
+            special_float,
+        ))
+        .context(StrContext::Label("floating-point number")),
+    )
+    .parse_next(input)
+}
+
+pub(crate) fn float_<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (
+        dec_int,
+        alt((exp.void(), (frac.void(), opt(exp.void())).void())),
+    )
+        .recognize()
+        .map(|b: &[u8]| unsafe {
+            from_utf8_unchecked(
+                b,
+                "`dec_int`, `one_of`, `exp`, and `frac` filter out non-ASCII",
+            )
+        })
+        .parse_next(input)
+}
+
+// frac = decimal-point zero-prefixable-int
+// decimal-point = %x2E               ; .
+pub(crate) fn frac<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (
+        b'.',
+        cut_err(zero_prefixable_int)
+            .context(StrContext::Expected(StrContextValue::Description("digit"))),
+    )
+        .recognize()
+        .map(|b: &[u8]| unsafe {
+            from_utf8_unchecked(
+                b,
+                "`.` and `parse_zero_prefixable_int` filter out non-ASCII",
+            )
+        })
+        .parse_next(input)
+}
+
+// zero-prefixable-int = DIGIT *( DIGIT / underscore DIGIT )
+pub(crate) fn zero_prefixable_int<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (
+        digit,
+        repeat(
+            0..,
+            alt((
+                digit.value(()),
+                (
+                    one_of(b'_'),
+                    cut_err(digit)
+                        .context(StrContext::Expected(StrContextValue::Description("digit"))),
+                )
+                    .value(()),
+            )),
+        )
+        .map(|()| ()),
+    )
+        .recognize()
+        .map(|b: &[u8]| unsafe { from_utf8_unchecked(b, "`digit` and `_` filter out non-ASCII") })
+        .parse_next(input)
+}
+
+// exp = "e" float-exp-part
+// float-exp-part = [ minus / plus ] zero-prefixable-int
+pub(crate) fn exp<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (
+        one_of((b'e', b'E')),
+        opt(one_of([b'+', b'-'])),
+        cut_err(zero_prefixable_int),
+    )
+        .recognize()
+        .map(|b: &[u8]| unsafe {
+            from_utf8_unchecked(
+                b,
+                "`one_of` and `parse_zero_prefixable_int` filter out non-ASCII",
+            )
+        })
+        .parse_next(input)
+}
+
+// special-float = [ minus / plus ] ( inf / nan )
+pub(crate) fn special_float(input: &mut Input<'_>) -> PResult<f64> {
+    (opt(one_of((b'+', b'-'))), alt((inf, nan)))
+        .map(|(s, f)| match s {
+            Some(b'+') | None => f,
+            Some(b'-') => -f,
+            _ => unreachable!("one_of should prevent this"),
+        })
+        .parse_next(input)
+}
+// inf = %x69.6e.66  ; inf
+pub(crate) fn inf(input: &mut Input<'_>) -> PResult<f64> {
+    tag(INF).value(f64::INFINITY).parse_next(input)
+}
+const INF: &[u8] = b"inf";
+// nan = %x6e.61.6e  ; nan
+pub(crate) fn nan(input: &mut Input<'_>) -> PResult<f64> {
+    tag(NAN).value(f64::NAN).parse_next(input)
+}
+const NAN: &[u8] = b"nan";
+
+// DIGIT = %x30-39 ; 0-9
+pub(crate) fn digit(input: &mut Input<'_>) -> PResult<u8> {
+    one_of(DIGIT).parse_next(input)
+}
+const DIGIT: RangeInclusive<u8> = b'0'..=b'9';
+
+// HEXDIG = DIGIT / "A" / "B" / "C" / "D" / "E" / "F"
+pub(crate) fn hexdig(input: &mut Input<'_>) -> PResult<u8> {
+    one_of(HEXDIG).parse_next(input)
+}
+pub(crate) const HEXDIG: (RangeInclusive<u8>, RangeInclusive<u8>, RangeInclusive<u8>) =
+    (DIGIT, b'A'..=b'F', b'a'..=b'f');
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn integers() {
+        let cases = [
+            ("+99", 99),
+            ("42", 42),
+            ("0", 0),
+            ("-17", -17),
+            ("1_000", 1_000),
+            ("5_349_221", 5_349_221),
+            ("1_2_3_4_5", 1_2_3_4_5),
+            ("0xF", 15),
+            ("0o0_755", 493),
+            ("0b1_0_1", 5),
+            (&std::i64::MIN.to_string()[..], std::i64::MIN),
+            (&std::i64::MAX.to_string()[..], std::i64::MAX),
+        ];
+        for &(input, expected) in &cases {
+            dbg!(input);
+            let parsed = integer.parse(new_input(input));
+            assert_eq!(parsed, Ok(expected), "Parsing {input:?}");
+        }
+
+        let overflow = "1000000000000000000000000000000000";
+        let parsed = integer.parse(new_input(overflow));
+        assert!(parsed.is_err());
+    }
+
+    #[track_caller]
+    fn assert_float_eq(actual: f64, expected: f64) {
+        if expected.is_nan() {
+            assert!(actual.is_nan());
+        } else if expected.is_infinite() {
+            assert!(actual.is_infinite());
+            assert_eq!(expected.is_sign_positive(), actual.is_sign_positive());
+        } else {
+            dbg!(expected);
+            dbg!(actual);
+            assert!((expected - actual).abs() < std::f64::EPSILON);
+        }
+    }
+
+    #[test]
+    fn floats() {
+        let cases = [
+            ("+1.0", 1.0),
+            ("3.1419", 3.1419),
+            ("-0.01", -0.01),
+            ("5e+22", 5e+22),
+            ("1e6", 1e6),
+            ("-2E-2", -2E-2),
+            ("6.626e-34", 6.626e-34),
+            ("9_224_617.445_991_228_313", 9_224_617.445_991_227),
+            ("-1.7976931348623157e+308", std::f64::MIN),
+            ("1.7976931348623157e+308", std::f64::MAX),
+            ("nan", f64::NAN),
+            ("+nan", f64::NAN),
+            ("-nan", f64::NAN),
+            ("inf", f64::INFINITY),
+            ("+inf", f64::INFINITY),
+            ("-inf", f64::NEG_INFINITY),
+            // ("1e+400", std::f64::INFINITY),
+        ];
+        for &(input, expected) in &cases {
+            dbg!(input);
+            let parsed = float.parse(new_input(input)).unwrap();
+            assert_float_eq(parsed, expected);
+
+            let overflow = "9e99999";
+            let parsed = float.parse(new_input(overflow));
+            assert!(parsed.is_err(), "{:?}", parsed);
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/state.rs

@@ -0,0 +1,323 @@
+use crate::key::Key;
+use crate::parser::errors::CustomError;
+use crate::repr::Decor;
+use crate::table::TableKeyValue;
+use crate::{ArrayOfTables, Document, InternalString, Item, RawString, Table};
+
+pub(crate) struct ParseState {
+    document: Document,
+    trailing: Option<std::ops::Range<usize>>,
+    current_table_position: usize,
+    current_table: Table,
+    current_is_array: bool,
+    current_table_path: Vec<Key>,
+}
+
+impl ParseState {
+    pub(crate) fn into_document(mut self) -> Result<Document, CustomError> {
+        self.finalize_table()?;
+        let trailing = self.trailing.map(RawString::with_span);
+        self.document.trailing = trailing.unwrap_or_default();
+        Ok(self.document)
+    }
+
+    pub(crate) fn on_ws(&mut self, span: std::ops::Range<usize>) {
+        if let Some(old) = self.trailing.take() {
+            self.trailing = Some(old.start..span.end);
+        } else {
+            self.trailing = Some(span);
+        }
+    }
+
+    pub(crate) fn on_comment(&mut self, span: std::ops::Range<usize>) {
+        if let Some(old) = self.trailing.take() {
+            self.trailing = Some(old.start..span.end);
+        } else {
+            self.trailing = Some(span);
+        }
+    }
+
+    pub(crate) fn on_keyval(
+        &mut self,
+        mut path: Vec<Key>,
+        mut kv: TableKeyValue,
+    ) -> Result<(), CustomError> {
+        {
+            let mut prefix = self.trailing.take();
+            let first_key = if path.is_empty() {
+                &mut kv.key
+            } else {
+                &mut path[0]
+            };
+            let prefix = match (
+                prefix.take(),
+                first_key.decor.prefix().and_then(|d| d.span()),
+            ) {
+                (Some(p), Some(k)) => Some(p.start..k.end),
+                (Some(p), None) | (None, Some(p)) => Some(p),
+                (None, None) => None,
+            };
+            first_key
+                .decor
+                .set_prefix(prefix.map(RawString::with_span).unwrap_or_default());
+        }
+
+        if let (Some(existing), Some(value)) = (self.current_table.span(), kv.value.span()) {
+            self.current_table.span = Some((existing.start)..(value.end));
+        }
+        let table = &mut self.current_table;
+        let table = Self::descend_path(table, &path, true)?;
+
+        // "Likewise, using dotted keys to redefine tables already defined in [table] form is not allowed"
+        let mixed_table_types = table.is_dotted() == path.is_empty();
+        if mixed_table_types {
+            return Err(CustomError::DuplicateKey {
+                key: kv.key.get().into(),
+                table: None,
+            });
+        }
+
+        let key: InternalString = kv.key.get_internal().into();
+        match table.items.entry(key) {
+            indexmap::map::Entry::Vacant(o) => {
+                o.insert(kv);
+            }
+            indexmap::map::Entry::Occupied(o) => {
+                // "Since tables cannot be defined more than once, redefining such tables using a [table] header is not allowed"
+                return Err(CustomError::DuplicateKey {
+                    key: o.key().as_str().into(),
+                    table: Some(self.current_table_path.clone()),
+                });
+            }
+        }
+
+        Ok(())
+    }
+
+    pub(crate) fn start_array_table(
+        &mut self,
+        path: Vec<Key>,
+        decor: Decor,
+        span: std::ops::Range<usize>,
+    ) -> Result<(), CustomError> {
+        debug_assert!(!path.is_empty());
+        debug_assert!(self.current_table.is_empty());
+        debug_assert!(self.current_table_path.is_empty());
+
+        // Look up the table on start to ensure the duplicate_key error points to the right line
+        let root = self.document.as_table_mut();
+        let parent_table = Self::descend_path(root, &path[..path.len() - 1], false)?;
+        let key = &path[path.len() - 1];
+        let entry = parent_table
+            .entry_format(key)
+            .or_insert(Item::ArrayOfTables(ArrayOfTables::new()));
+        entry
+            .as_array_of_tables()
+            .ok_or_else(|| CustomError::duplicate_key(&path, path.len() - 1))?;
+
+        self.current_table_position += 1;
+        self.current_table.decor = decor;
+        self.current_table.set_implicit(false);
+        self.current_table.set_dotted(false);
+        self.current_table.set_position(self.current_table_position);
+        self.current_table.span = Some(span);
+        self.current_is_array = true;
+        self.current_table_path = path;
+
+        Ok(())
+    }
+
+    pub(crate) fn start_table(
+        &mut self,
+        path: Vec<Key>,
+        decor: Decor,
+        span: std::ops::Range<usize>,
+    ) -> Result<(), CustomError> {
+        debug_assert!(!path.is_empty());
+        debug_assert!(self.current_table.is_empty());
+        debug_assert!(self.current_table_path.is_empty());
+
+        // 1. Look up the table on start to ensure the duplicate_key error points to the right line
+        // 2. Ensure any child tables from an implicit table are preserved
+        let root = self.document.as_table_mut();
+        let parent_table = Self::descend_path(root, &path[..path.len() - 1], false)?;
+        let key = &path[path.len() - 1];
+        if let Some(entry) = parent_table.remove(key.get()) {
+            match entry {
+                Item::Table(t) if t.implicit && !t.is_dotted() => {
+                    self.current_table = t;
+                }
+                // Since tables cannot be defined more than once, redefining such tables using a [table] header is not allowed. Likewise, using dotted keys to redefine tables already defined in [table] form is not allowed.
+                _ => return Err(CustomError::duplicate_key(&path, path.len() - 1)),
+            }
+        }
+
+        self.current_table_position += 1;
+        self.current_table.decor = decor;
+        self.current_table.set_implicit(false);
+        self.current_table.set_dotted(false);
+        self.current_table.set_position(self.current_table_position);
+        self.current_table.span = Some(span);
+        self.current_is_array = false;
+        self.current_table_path = path;
+
+        Ok(())
+    }
+
+    pub(crate) fn finalize_table(&mut self) -> Result<(), CustomError> {
+        let mut table = std::mem::take(&mut self.current_table);
+        let path = std::mem::take(&mut self.current_table_path);
+
+        let root = self.document.as_table_mut();
+        if path.is_empty() {
+            assert!(root.is_empty());
+            std::mem::swap(&mut table, root);
+        } else if self.current_is_array {
+            let parent_table = Self::descend_path(root, &path[..path.len() - 1], false)?;
+            let key = &path[path.len() - 1];
+
+            let entry = parent_table
+                .entry_format(key)
+                .or_insert(Item::ArrayOfTables(ArrayOfTables::new()));
+            let array = entry
+                .as_array_of_tables_mut()
+                .ok_or_else(|| CustomError::duplicate_key(&path, path.len() - 1))?;
+            array.push(table);
+            let span = if let (Some(first), Some(last)) = (
+                array.values.first().and_then(|t| t.span()),
+                array.values.last().and_then(|t| t.span()),
+            ) {
+                Some((first.start)..(last.end))
+            } else {
+                None
+            };
+            array.span = span;
+        } else {
+            let parent_table = Self::descend_path(root, &path[..path.len() - 1], false)?;
+            let key = &path[path.len() - 1];
+
+            let entry = parent_table.entry_format(key);
+            match entry {
+                crate::Entry::Occupied(entry) => {
+                    match entry.into_mut() {
+                        // if [a.b.c] header preceded [a.b]
+                        Item::Table(ref mut t) if t.implicit => {
+                            std::mem::swap(t, &mut table);
+                        }
+                        _ => return Err(CustomError::duplicate_key(&path, path.len() - 1)),
+                    }
+                }
+                crate::Entry::Vacant(entry) => {
+                    let item = Item::Table(table);
+                    entry.insert(item);
+                }
+            }
+        }
+
+        Ok(())
+    }
+
+    pub(crate) fn descend_path<'t, 'k>(
+        mut table: &'t mut Table,
+        path: &'k [Key],
+        dotted: bool,
+    ) -> Result<&'t mut Table, CustomError> {
+        for (i, key) in path.iter().enumerate() {
+            let entry = table.entry_format(key).or_insert_with(|| {
+                let mut new_table = Table::new();
+                new_table.set_implicit(true);
+                new_table.set_dotted(dotted);
+
+                Item::Table(new_table)
+            });
+            match *entry {
+                Item::Value(ref v) => {
+                    return Err(CustomError::extend_wrong_type(path, i, v.type_name()));
+                }
+                Item::ArrayOfTables(ref mut array) => {
+                    debug_assert!(!array.is_empty());
+
+                    let index = array.len() - 1;
+                    let last_child = array.get_mut(index).unwrap();
+
+                    table = last_child;
+                }
+                Item::Table(ref mut sweet_child_of_mine) => {
+                    // Since tables cannot be defined more than once, redefining such tables using a
+                    // [table] header is not allowed. Likewise, using dotted keys to redefine tables
+                    // already defined in [table] form is not allowed.
+                    if dotted && !sweet_child_of_mine.is_implicit() {
+                        return Err(CustomError::DuplicateKey {
+                            key: key.get().into(),
+                            table: None,
+                        });
+                    }
+                    table = sweet_child_of_mine;
+                }
+                _ => unreachable!(),
+            }
+        }
+        Ok(table)
+    }
+
+    pub(crate) fn on_std_header(
+        &mut self,
+        path: Vec<Key>,
+        trailing: std::ops::Range<usize>,
+        span: std::ops::Range<usize>,
+    ) -> Result<(), CustomError> {
+        debug_assert!(!path.is_empty());
+
+        self.finalize_table()?;
+        let leading = self
+            .trailing
+            .take()
+            .map(RawString::with_span)
+            .unwrap_or_default();
+        self.start_table(
+            path,
+            Decor::new(leading, RawString::with_span(trailing)),
+            span,
+        )?;
+
+        Ok(())
+    }
+
+    pub(crate) fn on_array_header(
+        &mut self,
+        path: Vec<Key>,
+        trailing: std::ops::Range<usize>,
+        span: std::ops::Range<usize>,
+    ) -> Result<(), CustomError> {
+        debug_assert!(!path.is_empty());
+
+        self.finalize_table()?;
+        let leading = self
+            .trailing
+            .take()
+            .map(RawString::with_span)
+            .unwrap_or_default();
+        self.start_array_table(
+            path,
+            Decor::new(leading, RawString::with_span(trailing)),
+            span,
+        )?;
+
+        Ok(())
+    }
+}
+
+impl Default for ParseState {
+    fn default() -> Self {
+        let mut root = Table::new();
+        root.span = Some(0..0);
+        Self {
+            document: Document::new(),
+            trailing: None,
+            current_table_position: 0,
+            current_table: root,
+            current_is_array: false,
+            current_table_path: Vec::new(),
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/strings.rs

@@ -0,0 +1,478 @@
+use std::borrow::Cow;
+use std::char;
+use std::ops::RangeInclusive;
+
+use winnow::combinator::alt;
+use winnow::combinator::cut_err;
+use winnow::combinator::delimited;
+use winnow::combinator::fail;
+use winnow::combinator::opt;
+use winnow::combinator::peek;
+use winnow::combinator::preceded;
+use winnow::combinator::repeat;
+use winnow::combinator::success;
+use winnow::combinator::terminated;
+use winnow::prelude::*;
+use winnow::stream::Stream;
+use winnow::token::any;
+use winnow::token::none_of;
+use winnow::token::one_of;
+use winnow::token::tag;
+use winnow::token::take_while;
+use winnow::trace::trace;
+
+use crate::parser::errors::CustomError;
+use crate::parser::numbers::HEXDIG;
+use crate::parser::prelude::*;
+use crate::parser::trivia::{from_utf8_unchecked, newline, ws, ws_newlines, NON_ASCII, WSCHAR};
+
+// ;; String
+
+// string = ml-basic-string / basic-string / ml-literal-string / literal-string
+pub(crate) fn string<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    trace(
+        "string",
+        alt((
+            ml_basic_string,
+            basic_string,
+            ml_literal_string,
+            literal_string.map(Cow::Borrowed),
+        )),
+    )
+    .parse_next(input)
+}
+
+// ;; Basic String
+
+// basic-string = quotation-mark *basic-char quotation-mark
+pub(crate) fn basic_string<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    trace("basic-string", |input: &mut Input<'i>| {
+        let _ = one_of(QUOTATION_MARK).parse_next(input)?;
+
+        let mut c = Cow::Borrowed("");
+        if let Some(ci) = opt(basic_chars).parse_next(input)? {
+            c = ci;
+        }
+        while let Some(ci) = opt(basic_chars).parse_next(input)? {
+            c.to_mut().push_str(&ci);
+        }
+
+        let _ = cut_err(one_of(QUOTATION_MARK))
+            .context(StrContext::Label("basic string"))
+            .parse_next(input)?;
+
+        Ok(c)
+    })
+    .parse_next(input)
+}
+
+// quotation-mark = %x22            ; "
+pub(crate) const QUOTATION_MARK: u8 = b'"';
+
+// basic-char = basic-unescaped / escaped
+fn basic_chars<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    alt((
+        // Deviate from the official grammar by batching the unescaped chars so we build a string a
+        // chunk at a time, rather than a `char` at a time.
+        take_while(1.., BASIC_UNESCAPED)
+            .try_map(std::str::from_utf8)
+            .map(Cow::Borrowed),
+        escaped.map(|c| Cow::Owned(String::from(c))),
+    ))
+    .parse_next(input)
+}
+
+// basic-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
+pub(crate) const BASIC_UNESCAPED: (
+    (u8, u8),
+    u8,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+) = (WSCHAR, 0x21, 0x23..=0x5B, 0x5D..=0x7E, NON_ASCII);
+
+// escaped = escape escape-seq-char
+fn escaped(input: &mut Input<'_>) -> PResult<char> {
+    preceded(ESCAPE, escape_seq_char).parse_next(input)
+}
+
+// escape = %x5C                    ; \
+pub(crate) const ESCAPE: u8 = b'\\';
+
+// escape-seq-char =  %x22         ; "    quotation mark  U+0022
+// escape-seq-char =/ %x5C         ; \    reverse solidus U+005C
+// escape-seq-char =/ %x62         ; b    backspace       U+0008
+// escape-seq-char =/ %x66         ; f    form feed       U+000C
+// escape-seq-char =/ %x6E         ; n    line feed       U+000A
+// escape-seq-char =/ %x72         ; r    carriage return U+000D
+// escape-seq-char =/ %x74         ; t    tab             U+0009
+// escape-seq-char =/ %x75 4HEXDIG ; uXXXX                U+XXXX
+// escape-seq-char =/ %x55 8HEXDIG ; UXXXXXXXX            U+XXXXXXXX
+fn escape_seq_char(input: &mut Input<'_>) -> PResult<char> {
+    dispatch! {any;
+        b'b' => success('\u{8}'),
+        b'f' => success('\u{c}'),
+        b'n' => success('\n'),
+        b'r' => success('\r'),
+        b't' => success('\t'),
+        b'u' => cut_err(hexescape::<4>).context(StrContext::Label("unicode 4-digit hex code")),
+        b'U' => cut_err(hexescape::<8>).context(StrContext::Label("unicode 8-digit hex code")),
+        b'\\' => success('\\'),
+        b'"' => success('"'),
+        _ => {
+            cut_err(fail::<_, char, _>)
+            .context(StrContext::Label("escape sequence"))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('b')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('f')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('n')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('r')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('t')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('u')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('U')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('\\')))
+            .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+        }
+    }
+    .parse_next(input)
+}
+
+pub(crate) fn hexescape<const N: usize>(input: &mut Input<'_>) -> PResult<char> {
+    take_while(0..=N, HEXDIG)
+        .verify(|b: &[u8]| b.len() == N)
+        .map(|b: &[u8]| unsafe { from_utf8_unchecked(b, "`is_ascii_digit` filters out on-ASCII") })
+        .verify_map(|s| u32::from_str_radix(s, 16).ok())
+        .try_map(|h| char::from_u32(h).ok_or(CustomError::OutOfRange))
+        .parse_next(input)
+}
+
+// ;; Multiline Basic String
+
+// ml-basic-string = ml-basic-string-delim [ newline ] ml-basic-body
+//                   ml-basic-string-delim
+fn ml_basic_string<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    trace(
+        "ml-basic-string",
+        delimited(
+            ML_BASIC_STRING_DELIM,
+            preceded(opt(newline), cut_err(ml_basic_body)),
+            cut_err(ML_BASIC_STRING_DELIM),
+        )
+        .context(StrContext::Label("multiline basic string")),
+    )
+    .parse_next(input)
+}
+
+// ml-basic-string-delim = 3quotation-mark
+pub(crate) const ML_BASIC_STRING_DELIM: &[u8] = b"\"\"\"";
+
+// ml-basic-body = *mlb-content *( mlb-quotes 1*mlb-content ) [ mlb-quotes ]
+fn ml_basic_body<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    let mut c = Cow::Borrowed("");
+    if let Some(ci) = opt(mlb_content).parse_next(input)? {
+        c = ci;
+    }
+    while let Some(ci) = opt(mlb_content).parse_next(input)? {
+        c.to_mut().push_str(&ci);
+    }
+
+    while let Some(qi) = opt(mlb_quotes(none_of(b'\"').value(()))).parse_next(input)? {
+        if let Some(ci) = opt(mlb_content).parse_next(input)? {
+            c.to_mut().push_str(qi);
+            c.to_mut().push_str(&ci);
+            while let Some(ci) = opt(mlb_content).parse_next(input)? {
+                c.to_mut().push_str(&ci);
+            }
+        } else {
+            break;
+        }
+    }
+
+    if let Some(qi) = opt(mlb_quotes(tag(ML_BASIC_STRING_DELIM).value(()))).parse_next(input)? {
+        c.to_mut().push_str(qi);
+    }
+
+    Ok(c)
+}
+
+// mlb-content = mlb-char / newline / mlb-escaped-nl
+// mlb-char = mlb-unescaped / escaped
+fn mlb_content<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    alt((
+        // Deviate from the official grammar by batching the unescaped chars so we build a string a
+        // chunk at a time, rather than a `char` at a time.
+        take_while(1.., MLB_UNESCAPED)
+            .try_map(std::str::from_utf8)
+            .map(Cow::Borrowed),
+        // Order changed fromg grammar so `escaped` can more easily `cut_err` on bad escape sequences
+        mlb_escaped_nl.map(|_| Cow::Borrowed("")),
+        escaped.map(|c| Cow::Owned(String::from(c))),
+        newline.map(|_| Cow::Borrowed("\n")),
+    ))
+    .parse_next(input)
+}
+
+// mlb-quotes = 1*2quotation-mark
+fn mlb_quotes<'i>(
+    mut term: impl winnow::Parser<Input<'i>, (), ContextError>,
+) -> impl Parser<Input<'i>, &'i str, ContextError> {
+    move |input: &mut Input<'i>| {
+        let start = input.checkpoint();
+        let res = terminated(b"\"\"", peek(term.by_ref()))
+            .map(|b| unsafe { from_utf8_unchecked(b, "`bytes` out non-ASCII") })
+            .parse_next(input);
+
+        match res {
+            Err(winnow::error::ErrMode::Backtrack(_)) => {
+                input.reset(start);
+                terminated(b"\"", peek(term.by_ref()))
+                    .map(|b| unsafe { from_utf8_unchecked(b, "`bytes` out non-ASCII") })
+                    .parse_next(input)
+            }
+            res => res,
+        }
+    }
+}
+
+// mlb-unescaped = wschar / %x21 / %x23-5B / %x5D-7E / non-ascii
+pub(crate) const MLB_UNESCAPED: (
+    (u8, u8),
+    u8,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+) = (WSCHAR, 0x21, 0x23..=0x5B, 0x5D..=0x7E, NON_ASCII);
+
+// mlb-escaped-nl = escape ws newline *( wschar / newline
+// When the last non-whitespace character on a line is a \,
+// it will be trimmed along with all whitespace
+// (including newlines) up to the next non-whitespace
+// character or closing delimiter.
+fn mlb_escaped_nl(input: &mut Input<'_>) -> PResult<()> {
+    repeat(1.., (ESCAPE, ws, ws_newlines))
+        .map(|()| ())
+        .value(())
+        .parse_next(input)
+}
+
+// ;; Literal String
+
+// literal-string = apostrophe *literal-char apostrophe
+pub(crate) fn literal_string<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    trace(
+        "literal-string",
+        delimited(
+            APOSTROPHE,
+            cut_err(take_while(0.., LITERAL_CHAR)),
+            cut_err(APOSTROPHE),
+        )
+        .try_map(std::str::from_utf8)
+        .context(StrContext::Label("literal string")),
+    )
+    .parse_next(input)
+}
+
+// apostrophe = %x27 ; ' apostrophe
+pub(crate) const APOSTROPHE: u8 = b'\'';
+
+// literal-char = %x09 / %x20-26 / %x28-7E / non-ascii
+pub(crate) const LITERAL_CHAR: (
+    u8,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+) = (0x9, 0x20..=0x26, 0x28..=0x7E, NON_ASCII);
+
+// ;; Multiline Literal String
+
+// ml-literal-string = ml-literal-string-delim [ newline ] ml-literal-body
+//                     ml-literal-string-delim
+fn ml_literal_string<'i>(input: &mut Input<'i>) -> PResult<Cow<'i, str>> {
+    trace(
+        "ml-literal-string",
+        delimited(
+            (ML_LITERAL_STRING_DELIM, opt(newline)),
+            cut_err(ml_literal_body.map(|t| {
+                if t.contains("\r\n") {
+                    Cow::Owned(t.replace("\r\n", "\n"))
+                } else {
+                    Cow::Borrowed(t)
+                }
+            })),
+            cut_err(ML_LITERAL_STRING_DELIM),
+        )
+        .context(StrContext::Label("multiline literal string")),
+    )
+    .parse_next(input)
+}
+
+// ml-literal-string-delim = 3apostrophe
+pub(crate) const ML_LITERAL_STRING_DELIM: &[u8] = b"'''";
+
+// ml-literal-body = *mll-content *( mll-quotes 1*mll-content ) [ mll-quotes ]
+fn ml_literal_body<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (
+        repeat(0.., mll_content).map(|()| ()),
+        repeat(
+            0..,
+            (
+                mll_quotes(none_of(APOSTROPHE).value(())),
+                repeat(1.., mll_content).map(|()| ()),
+            ),
+        )
+        .map(|()| ()),
+        opt(mll_quotes(tag(ML_LITERAL_STRING_DELIM).value(()))),
+    )
+        .recognize()
+        .try_map(std::str::from_utf8)
+        .parse_next(input)
+}
+
+// mll-content = mll-char / newline
+fn mll_content(input: &mut Input<'_>) -> PResult<u8> {
+    alt((one_of(MLL_CHAR), newline)).parse_next(input)
+}
+
+// mll-char = %x09 / %x20-26 / %x28-7E / non-ascii
+const MLL_CHAR: (
+    u8,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+    RangeInclusive<u8>,
+) = (0x9, 0x20..=0x26, 0x28..=0x7E, NON_ASCII);
+
+// mll-quotes = 1*2apostrophe
+fn mll_quotes<'i>(
+    mut term: impl winnow::Parser<Input<'i>, (), ContextError>,
+) -> impl Parser<Input<'i>, &'i str, ContextError> {
+    move |input: &mut Input<'i>| {
+        let start = input.checkpoint();
+        let res = terminated(b"''", peek(term.by_ref()))
+            .map(|b| unsafe { from_utf8_unchecked(b, "`bytes` out non-ASCII") })
+            .parse_next(input);
+
+        match res {
+            Err(winnow::error::ErrMode::Backtrack(_)) => {
+                input.reset(start);
+                terminated(b"'", peek(term.by_ref()))
+                    .map(|b| unsafe { from_utf8_unchecked(b, "`bytes` out non-ASCII") })
+                    .parse_next(input)
+            }
+            res => res,
+        }
+    }
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn basic_string() {
+        let input =
+            r#""I'm a string. \"You can quote me\". Name\tJos\u00E9\nLocation\tSF. \U0002070E""#;
+        let expected = "I\'m a string. \"You can quote me\". Name\tJosé\nLocation\tSF. \u{2070E}";
+        let parsed = string.parse(new_input(input));
+        assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+    }
+
+    #[test]
+    fn ml_basic_string() {
+        let cases = [
+            (
+                r#""""
+Roses are red
+Violets are blue""""#,
+                r#"Roses are red
+Violets are blue"#,
+            ),
+            (r#"""" \""" """"#, " \"\"\" "),
+            (r#"""" \\""""#, " \\"),
+        ];
+
+        for &(input, expected) in &cases {
+            let parsed = string.parse(new_input(input));
+            assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+        }
+
+        let invalid_cases = [r#""""  """#, r#""""  \""""#];
+
+        for input in &invalid_cases {
+            let parsed = string.parse(new_input(input));
+            assert!(parsed.is_err());
+        }
+    }
+
+    #[test]
+    fn ml_basic_string_escape_ws() {
+        let inputs = [
+            r#""""
+The quick brown \
+
+
+  fox jumps over \
+    the lazy dog.""""#,
+            r#""""\
+       The quick brown \
+       fox jumps over \
+       the lazy dog.\
+       """"#,
+        ];
+        for input in &inputs {
+            let expected = "The quick brown fox jumps over the lazy dog.";
+            let parsed = string.parse(new_input(input));
+            assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+        }
+        let empties = [
+            r#""""\
+       """"#,
+            r#""""
+\
+  \
+""""#,
+        ];
+        for input in &empties {
+            let expected = "";
+            let parsed = string.parse(new_input(input));
+            assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+        }
+    }
+
+    #[test]
+    fn literal_string() {
+        let inputs = [
+            r#"'C:\Users\nodejs\templates'"#,
+            r#"'\\ServerX\admin$\system32\'"#,
+            r#"'Tom "Dubs" Preston-Werner'"#,
+            r#"'<\i\c*\s*>'"#,
+        ];
+
+        for input in &inputs {
+            let expected = &input[1..input.len() - 1];
+            let parsed = string.parse(new_input(input));
+            assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+        }
+    }
+
+    #[test]
+    fn ml_literal_string() {
+        let inputs = [
+            r#"'''I [dw]on't need \d{2} apples'''"#,
+            r#"''''one_quote''''"#,
+        ];
+        for input in &inputs {
+            let expected = &input[3..input.len() - 3];
+            let parsed = string.parse(new_input(input));
+            assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+        }
+
+        let input = r#"'''
+The first newline is
+trimmed in raw strings.
+   All other whitespace
+   is preserved.
+'''"#;
+        let expected = &input[4..input.len() - 3];
+        let parsed = string.parse(new_input(input));
+        assert_eq!(parsed.as_deref(), Ok(expected), "Parsing {input:?}");
+    }
+}

third-party/vendor/toml_edit/src/parser/table.rs

@@ -0,0 +1,89 @@
+use std::cell::RefCell;
+#[allow(unused_imports)]
+use std::ops::DerefMut;
+
+use winnow::combinator::cut_err;
+use winnow::combinator::delimited;
+use winnow::combinator::peek;
+use winnow::token::take;
+
+// https://github.com/rust-lang/rust/issues/41358
+use crate::parser::key::key;
+use crate::parser::prelude::*;
+use crate::parser::state::ParseState;
+use crate::parser::trivia::line_trailing;
+
+// std-table-open  = %x5B ws     ; [ Left square bracket
+pub(crate) const STD_TABLE_OPEN: u8 = b'[';
+// std-table-close = ws %x5D     ; ] Right square bracket
+const STD_TABLE_CLOSE: u8 = b']';
+// array-table-open  = %x5B.5B ws  ; [[ Double left square bracket
+const ARRAY_TABLE_OPEN: &[u8] = b"[[";
+// array-table-close = ws %x5D.5D  ; ]] Double right quare bracket
+const ARRAY_TABLE_CLOSE: &[u8] = b"]]";
+
+// ;; Standard Table
+
+// std-table = std-table-open key *( table-key-sep key) std-table-close
+pub(crate) fn std_table<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        (
+            delimited(
+                STD_TABLE_OPEN,
+                cut_err(key),
+                cut_err(STD_TABLE_CLOSE)
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('.')))
+                    .context(StrContext::Expected(StrContextValue::StringLiteral("]"))),
+            )
+            .with_span(),
+            cut_err(line_trailing)
+                .context(StrContext::Expected(StrContextValue::CharLiteral('\n')))
+                .context(StrContext::Expected(StrContextValue::CharLiteral('#'))),
+        )
+            .try_map(|((h, span), t)| state.borrow_mut().deref_mut().on_std_header(h, t, span))
+            .parse_next(i)
+    }
+}
+
+// ;; Array Table
+
+// array-table = array-table-open key *( table-key-sep key) array-table-close
+pub(crate) fn array_table<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        (
+            delimited(
+                ARRAY_TABLE_OPEN,
+                cut_err(key),
+                cut_err(ARRAY_TABLE_CLOSE)
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('.')))
+                    .context(StrContext::Expected(StrContextValue::StringLiteral("]]"))),
+            )
+            .with_span(),
+            cut_err(line_trailing)
+                .context(StrContext::Expected(StrContextValue::CharLiteral('\n')))
+                .context(StrContext::Expected(StrContextValue::CharLiteral('#'))),
+        )
+            .try_map(|((h, span), t)| state.borrow_mut().deref_mut().on_array_header(h, t, span))
+            .parse_next(i)
+    }
+}
+
+// ;; Table
+
+// table = std-table / array-table
+pub(crate) fn table<'s, 'i>(
+    state: &'s RefCell<ParseState>,
+) -> impl Parser<Input<'i>, (), ContextError> + 's {
+    move |i: &mut Input<'i>| {
+        dispatch!(peek::<_, &[u8],_,_>(take(2usize));
+            b"[[" => array_table(state),
+            _ => std_table(state),
+        )
+        .context(StrContext::Label("table header"))
+        .parse_next(i)
+    }
+}

third-party/vendor/toml_edit/src/parser/trivia.rs

@@ -0,0 +1,156 @@
+use std::ops::RangeInclusive;
+
+use winnow::combinator::alt;
+use winnow::combinator::eof;
+use winnow::combinator::opt;
+use winnow::combinator::repeat;
+use winnow::combinator::terminated;
+use winnow::prelude::*;
+use winnow::token::one_of;
+use winnow::token::take_while;
+
+use crate::parser::prelude::*;
+
+pub(crate) unsafe fn from_utf8_unchecked<'b>(
+    bytes: &'b [u8],
+    safety_justification: &'static str,
+) -> &'b str {
+    if cfg!(debug_assertions) {
+        // Catch problems more quickly when testing
+        std::str::from_utf8(bytes).expect(safety_justification)
+    } else {
+        std::str::from_utf8_unchecked(bytes)
+    }
+}
+
+// wschar = ( %x20 /              ; Space
+//            %x09 )              ; Horizontal tab
+pub(crate) const WSCHAR: (u8, u8) = (b' ', b'\t');
+
+// ws = *wschar
+pub(crate) fn ws<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    take_while(0.., WSCHAR)
+        .map(|b| unsafe { from_utf8_unchecked(b, "`is_wschar` filters out on-ASCII") })
+        .parse_next(input)
+}
+
+// non-ascii = %x80-D7FF / %xE000-10FFFF
+// - ASCII is 0xxxxxxx
+// - First byte for UTF-8 is 11xxxxxx
+// - Subsequent UTF-8 bytes are 10xxxxxx
+pub(crate) const NON_ASCII: RangeInclusive<u8> = 0x80..=0xff;
+
+// non-eol = %x09 / %x20-7E / non-ascii
+pub(crate) const NON_EOL: (u8, RangeInclusive<u8>, RangeInclusive<u8>) =
+    (0x09, 0x20..=0x7E, NON_ASCII);
+
+// comment-start-symbol = %x23 ; #
+pub(crate) const COMMENT_START_SYMBOL: u8 = b'#';
+
+// comment = comment-start-symbol *non-eol
+pub(crate) fn comment<'i>(input: &mut Input<'i>) -> PResult<&'i [u8]> {
+    (COMMENT_START_SYMBOL, take_while(0.., NON_EOL))
+        .recognize()
+        .parse_next(input)
+}
+
+// newline = ( %x0A /              ; LF
+//             %x0D.0A )           ; CRLF
+pub(crate) fn newline(input: &mut Input<'_>) -> PResult<u8> {
+    alt((
+        one_of(LF).value(b'\n'),
+        (one_of(CR), one_of(LF)).value(b'\n'),
+    ))
+    .parse_next(input)
+}
+pub(crate) const LF: u8 = b'\n';
+pub(crate) const CR: u8 = b'\r';
+
+// ws-newline       = *( wschar / newline )
+pub(crate) fn ws_newline<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    repeat(
+        0..,
+        alt((newline.value(&b"\n"[..]), take_while(1.., WSCHAR))),
+    )
+    .map(|()| ())
+    .recognize()
+    .map(|b| unsafe { from_utf8_unchecked(b, "`is_wschar` and `newline` filters out on-ASCII") })
+    .parse_next(input)
+}
+
+// ws-newlines      = newline *( wschar / newline )
+pub(crate) fn ws_newlines<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    (newline, ws_newline)
+        .recognize()
+        .map(|b| unsafe {
+            from_utf8_unchecked(b, "`is_wschar` and `newline` filters out on-ASCII")
+        })
+        .parse_next(input)
+}
+
+// note: this rule is not present in the original grammar
+// ws-comment-newline = *( ws-newline-nonempty / comment )
+pub(crate) fn ws_comment_newline<'i>(input: &mut Input<'i>) -> PResult<&'i [u8]> {
+    repeat(
+        0..,
+        alt((
+            repeat(
+                1..,
+                alt((take_while(1.., WSCHAR), newline.value(&b"\n"[..]))),
+            )
+            .map(|()| ()),
+            comment.value(()),
+        )),
+    )
+    .map(|()| ())
+    .recognize()
+    .parse_next(input)
+}
+
+// note: this rule is not present in the original grammar
+// line-ending = newline / eof
+pub(crate) fn line_ending<'i>(input: &mut Input<'i>) -> PResult<&'i str> {
+    alt((newline.value("\n"), eof.value(""))).parse_next(input)
+}
+
+// note: this rule is not present in the original grammar
+// line-trailing = ws [comment] skip-line-ending
+pub(crate) fn line_trailing(input: &mut Input<'_>) -> PResult<std::ops::Range<usize>> {
+    terminated((ws, opt(comment)).span(), line_ending).parse_next(input)
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn trivia() {
+        let inputs = [
+            "",
+            r#" "#,
+            r#"
+"#,
+            r#"
+# comment
+
+# comment2
+
+
+"#,
+            r#"
+        "#,
+            r#"# comment
+# comment2
+
+
+   "#,
+        ];
+        for input in inputs {
+            dbg!(input);
+            let parsed = ws_comment_newline.parse(new_input(input));
+            assert!(parsed.is_ok(), "{:?}", parsed);
+            let parsed = parsed.unwrap();
+            assert_eq!(parsed, input.as_bytes());
+        }
+    }
+}

third-party/vendor/toml_edit/src/parser/value.rs

@@ -0,0 +1,155 @@
+use winnow::combinator::alt;
+use winnow::combinator::fail;
+use winnow::combinator::peek;
+use winnow::token::any;
+
+use crate::parser::array::array;
+use crate::parser::datetime::date_time;
+use crate::parser::inline_table::inline_table;
+use crate::parser::numbers::{float, integer};
+use crate::parser::prelude::*;
+use crate::parser::strings::string;
+use crate::repr::{Formatted, Repr};
+use crate::value as v;
+use crate::RawString;
+use crate::Value;
+
+// val = string / boolean / array / inline-table / date-time / float / integer
+pub(crate) fn value<'i>(check: RecursionCheck) -> impl Parser<Input<'i>, v::Value, ContextError> {
+    move |input: &mut Input<'i>| {
+        dispatch!{peek(any);
+            crate::parser::strings::QUOTATION_MARK |
+            crate::parser::strings::APOSTROPHE => string.map(|s| {
+                v::Value::String(Formatted::new(
+                    s.into_owned()
+                ))
+            }),
+            crate::parser::array::ARRAY_OPEN => array(check).map(v::Value::Array),
+            crate::parser::inline_table::INLINE_TABLE_OPEN => inline_table(check).map(v::Value::InlineTable),
+            // Date/number starts
+            b'+' | b'-' | b'0'..=b'9' => {
+                // Uncommon enough not to be worth optimizing at this time
+                alt((
+                    date_time
+                        .map(v::Value::from),
+                    float
+                        .map(v::Value::from),
+                    integer
+                        .map(v::Value::from),
+                ))
+            },
+            // Report as if they were numbers because its most likely a typo
+            b'_' => {
+                    integer
+                        .map(v::Value::from)
+                .context(StrContext::Expected(StrContextValue::Description("leading digit")))
+            },
+            // Report as if they were numbers because its most likely a typo
+            b'.' =>  {
+                    float
+                        .map(v::Value::from)
+                .context(StrContext::Expected(StrContextValue::Description("leading digit")))
+            },
+            b't' => {
+                crate::parser::numbers::true_.map(v::Value::from)
+                    .context(StrContext::Label("string"))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('\'')))
+            },
+            b'f' => {
+                crate::parser::numbers::false_.map(v::Value::from)
+                    .context(StrContext::Label("string"))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('\'')))
+            },
+            b'i' => {
+                crate::parser::numbers::inf.map(v::Value::from)
+                    .context(StrContext::Label("string"))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('\'')))
+            },
+            b'n' => {
+                crate::parser::numbers::nan.map(v::Value::from)
+                    .context(StrContext::Label("string"))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('\'')))
+            },
+            _ => {
+                fail
+                    .context(StrContext::Label("string"))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('"')))
+                    .context(StrContext::Expected(StrContextValue::CharLiteral('\'')))
+            },
+    }
+        .with_span()
+        .try_map(|(value, span)| apply_raw(value, span))
+        .parse_next(input)
+    }
+}
+
+fn apply_raw(mut val: Value, span: std::ops::Range<usize>) -> Result<Value, std::str::Utf8Error> {
+    match val {
+        Value::String(ref mut f) => {
+            let raw = RawString::with_span(span);
+            f.set_repr_unchecked(Repr::new_unchecked(raw));
+        }
+        Value::Integer(ref mut f) => {
+            let raw = RawString::with_span(span);
+            f.set_repr_unchecked(Repr::new_unchecked(raw));
+        }
+        Value::Float(ref mut f) => {
+            let raw = RawString::with_span(span);
+            f.set_repr_unchecked(Repr::new_unchecked(raw));
+        }
+        Value::Boolean(ref mut f) => {
+            let raw = RawString::with_span(span);
+            f.set_repr_unchecked(Repr::new_unchecked(raw));
+        }
+        Value::Datetime(ref mut f) => {
+            let raw = RawString::with_span(span);
+            f.set_repr_unchecked(Repr::new_unchecked(raw));
+        }
+        Value::Array(ref mut arr) => {
+            arr.span = Some(span);
+        }
+        Value::InlineTable(ref mut table) => {
+            table.span = Some(span);
+        }
+    };
+    val.decorate("", "");
+    Ok(val)
+}
+
+#[cfg(test)]
+mod test {
+    use super::*;
+
+    #[test]
+    fn values() {
+        let inputs = [
+            "1979-05-27T00:32:00.999999",
+            "-239",
+            "1e200",
+            "9_224_617.445_991_228_313",
+            r#"'''I [dw]on't need \d{2} apples'''"#,
+            r#"'''
+The first newline is
+trimmed in raw strings.
+   All other whitespace
+   is preserved.
+'''"#,
+            r#""Jos\u00E9\n""#,
+            r#""\\\"\b/\f\n\r\t\u00E9\U000A0000""#,
+            r#"{ hello = "world", a = 1}"#,
+            r#"[ { x = 1, a = "2" }, {a = "a",b = "b",     c =    "c"} ]"#,
+        ];
+        for input in inputs {
+            dbg!(input);
+            let mut parsed = value(Default::default()).parse(new_input(input));
+            if let Ok(parsed) = &mut parsed {
+                parsed.despan(input);
+            }
+            assert_eq!(parsed.map(|a| a.to_string()), Ok(input.to_owned()));
+        }
+    }
+}

third-party/vendor/toml_edit/src/raw_string.rs

@@ -0,0 +1,182 @@
+use crate::InternalString;
+
+/// Opaque string storage for raw TOML; internal to `toml_edit`
+#[derive(PartialEq, Eq, Clone, Hash)]
+pub struct RawString(RawStringInner);
+
+#[derive(PartialEq, Eq, Clone, Hash)]
+enum RawStringInner {
+    Empty,
+    Explicit(InternalString),
+    Spanned(std::ops::Range<usize>),
+}
+
+impl RawString {
+    pub(crate) fn with_span(span: std::ops::Range<usize>) -> Self {
+        if span.start == span.end {
+            RawString(RawStringInner::Empty)
+        } else {
+            RawString(RawStringInner::Spanned(span))
+        }
+    }
+
+    /// Access the underlying string
+    pub fn as_str(&self) -> Option<&str> {
+        match &self.0 {
+            RawStringInner::Empty => Some(""),
+            RawStringInner::Explicit(s) => Some(s.as_str()),
+            RawStringInner::Spanned(_) => None,
+        }
+    }
+
+    pub(crate) fn to_str<'s>(&'s self, input: &'s str) -> &'s str {
+        match &self.0 {
+            RawStringInner::Empty => "",
+            RawStringInner::Explicit(s) => s.as_str(),
+            RawStringInner::Spanned(span) => input.get(span.clone()).unwrap_or_else(|| {
+                panic!("span {:?} should be in input:\n```\n{}\n```", span, input)
+            }),
+        }
+    }
+
+    pub(crate) fn to_str_with_default<'s>(
+        &'s self,
+        input: Option<&'s str>,
+        default: &'s str,
+    ) -> &'s str {
+        match &self.0 {
+            RawStringInner::Empty => "",
+            RawStringInner::Explicit(s) => s.as_str(),
+            RawStringInner::Spanned(span) => {
+                if let Some(input) = input {
+                    input.get(span.clone()).unwrap_or_else(|| {
+                        panic!("span {:?} should be in input:\n```\n{}\n```", span, input)
+                    })
+                } else {
+                    default
+                }
+            }
+        }
+    }
+
+    /// Access the underlying span
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        match &self.0 {
+            RawStringInner::Empty => None,
+            RawStringInner::Explicit(_) => None,
+            RawStringInner::Spanned(span) => Some(span.clone()),
+        }
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        match &self.0 {
+            RawStringInner::Empty => {}
+            RawStringInner::Explicit(_) => {}
+            RawStringInner::Spanned(span) => {
+                *self = Self::from(input.get(span.clone()).unwrap_or_else(|| {
+                    panic!("span {:?} should be in input:\n```\n{}\n```", span, input)
+                }))
+            }
+        }
+    }
+
+    pub(crate) fn encode(&self, buf: &mut dyn std::fmt::Write, input: &str) -> std::fmt::Result {
+        let raw = self.to_str(input);
+        for part in raw.split('\r') {
+            write!(buf, "{}", part)?;
+        }
+        Ok(())
+    }
+
+    pub(crate) fn encode_with_default(
+        &self,
+        buf: &mut dyn std::fmt::Write,
+        input: Option<&str>,
+        default: &str,
+    ) -> std::fmt::Result {
+        let raw = self.to_str_with_default(input, default);
+        for part in raw.split('\r') {
+            write!(buf, "{}", part)?;
+        }
+        Ok(())
+    }
+}
+
+impl Default for RawString {
+    fn default() -> Self {
+        Self(RawStringInner::Empty)
+    }
+}
+
+impl std::fmt::Debug for RawString {
+    #[inline]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        match &self.0 {
+            RawStringInner::Empty => write!(formatter, "empty"),
+            RawStringInner::Explicit(s) => write!(formatter, "{:?}", s),
+            RawStringInner::Spanned(s) => write!(formatter, "{:?}", s),
+        }
+    }
+}
+
+impl From<&str> for RawString {
+    #[inline]
+    fn from(s: &str) -> Self {
+        if s.is_empty() {
+            Self(RawStringInner::Empty)
+        } else {
+            InternalString::from(s).into()
+        }
+    }
+}
+
+impl From<String> for RawString {
+    #[inline]
+    fn from(s: String) -> Self {
+        if s.is_empty() {
+            Self(RawStringInner::Empty)
+        } else {
+            InternalString::from(s).into()
+        }
+    }
+}
+
+impl From<&String> for RawString {
+    #[inline]
+    fn from(s: &String) -> Self {
+        if s.is_empty() {
+            Self(RawStringInner::Empty)
+        } else {
+            InternalString::from(s).into()
+        }
+    }
+}
+
+impl From<InternalString> for RawString {
+    #[inline]
+    fn from(inner: InternalString) -> Self {
+        Self(RawStringInner::Explicit(inner))
+    }
+}
+
+impl From<&InternalString> for RawString {
+    #[inline]
+    fn from(s: &InternalString) -> Self {
+        if s.is_empty() {
+            Self(RawStringInner::Empty)
+        } else {
+            InternalString::from(s).into()
+        }
+    }
+}
+
+impl From<Box<str>> for RawString {
+    #[inline]
+    fn from(s: Box<str>) -> Self {
+        if s.is_empty() {
+            Self(RawStringInner::Empty)
+        } else {
+            InternalString::from(s).into()
+        }
+    }
+}

third-party/vendor/toml_edit/src/repr.rs

@@ -0,0 +1,253 @@
+use std::borrow::Cow;
+
+use crate::RawString;
+
+/// A value together with its `to_string` representation,
+/// including surrounding it whitespaces and comments.
+#[derive(Eq, PartialEq, Clone, Hash)]
+pub struct Formatted<T> {
+    value: T,
+    repr: Option<Repr>,
+    decor: Decor,
+}
+
+impl<T> Formatted<T>
+where
+    T: ValueRepr,
+{
+    /// Default-formatted value
+    pub fn new(value: T) -> Self {
+        Self {
+            value,
+            repr: None,
+            decor: Default::default(),
+        }
+    }
+
+    pub(crate) fn set_repr_unchecked(&mut self, repr: Repr) {
+        self.repr = Some(repr);
+    }
+
+    /// The wrapped value
+    pub fn value(&self) -> &T {
+        &self.value
+    }
+
+    /// The wrapped value
+    pub fn into_value(self) -> T {
+        self.value
+    }
+
+    /// Returns the raw representation, if available.
+    pub fn as_repr(&self) -> Option<&Repr> {
+        self.repr.as_ref()
+    }
+
+    /// Returns the default raw representation.
+    pub fn default_repr(&self) -> Repr {
+        self.value.to_repr()
+    }
+
+    /// Returns a raw representation.
+    pub fn display_repr(&self) -> Cow<str> {
+        self.as_repr()
+            .and_then(|r| r.as_raw().as_str())
+            .map(Cow::Borrowed)
+            .unwrap_or_else(|| {
+                Cow::Owned(self.default_repr().as_raw().as_str().unwrap().to_owned())
+            })
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.repr.as_ref().and_then(|r| r.span())
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.decor.despan(input);
+        if let Some(repr) = &mut self.repr {
+            repr.despan(input);
+        }
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        &mut self.decor
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor(&self) -> &Decor {
+        &self.decor
+    }
+
+    /// Auto formats the value.
+    pub fn fmt(&mut self) {
+        self.repr = Some(self.value.to_repr());
+    }
+}
+
+impl<T> std::fmt::Debug for Formatted<T>
+where
+    T: std::fmt::Debug,
+{
+    #[inline]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        let mut d = formatter.debug_struct("Formatted");
+        d.field("value", &self.value);
+        match &self.repr {
+            Some(r) => d.field("repr", r),
+            None => d.field("repr", &"default"),
+        };
+        d.field("decor", &self.decor);
+        d.finish()
+    }
+}
+
+impl<T> std::fmt::Display for Formatted<T>
+where
+    T: ValueRepr,
+{
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        crate::encode::Encode::encode(self, f, None, ("", ""))
+    }
+}
+
+pub trait ValueRepr: crate::private::Sealed {
+    /// The TOML representation of the value
+    fn to_repr(&self) -> Repr;
+}
+
+/// TOML-encoded value
+#[derive(Eq, PartialEq, Clone, Hash)]
+pub struct Repr {
+    raw_value: RawString,
+}
+
+impl Repr {
+    pub(crate) fn new_unchecked(raw: impl Into<RawString>) -> Self {
+        Repr {
+            raw_value: raw.into(),
+        }
+    }
+
+    /// Access the underlying value
+    pub fn as_raw(&self) -> &RawString {
+        &self.raw_value
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.raw_value.span()
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.raw_value.despan(input)
+    }
+
+    pub(crate) fn encode(&self, buf: &mut dyn std::fmt::Write, input: &str) -> std::fmt::Result {
+        self.as_raw().encode(buf, input)
+    }
+}
+
+impl std::fmt::Debug for Repr {
+    #[inline]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        self.raw_value.fmt(formatter)
+    }
+}
+
+/// A prefix and suffix,
+///
+/// Including comments, whitespaces and newlines.
+#[derive(Eq, PartialEq, Clone, Default, Hash)]
+pub struct Decor {
+    prefix: Option<RawString>,
+    suffix: Option<RawString>,
+}
+
+impl Decor {
+    /// Creates a new decor from the given prefix and suffix.
+    pub fn new(prefix: impl Into<RawString>, suffix: impl Into<RawString>) -> Self {
+        Self {
+            prefix: Some(prefix.into()),
+            suffix: Some(suffix.into()),
+        }
+    }
+
+    /// Go back to default decor
+    pub fn clear(&mut self) {
+        self.prefix = None;
+        self.suffix = None;
+    }
+
+    /// Get the prefix.
+    pub fn prefix(&self) -> Option<&RawString> {
+        self.prefix.as_ref()
+    }
+
+    pub(crate) fn prefix_encode(
+        &self,
+        buf: &mut dyn std::fmt::Write,
+        input: Option<&str>,
+        default: &str,
+    ) -> std::fmt::Result {
+        if let Some(prefix) = self.prefix() {
+            prefix.encode_with_default(buf, input, default)
+        } else {
+            write!(buf, "{}", default)
+        }
+    }
+
+    /// Set the prefix.
+    pub fn set_prefix(&mut self, prefix: impl Into<RawString>) {
+        self.prefix = Some(prefix.into());
+    }
+
+    /// Get the suffix.
+    pub fn suffix(&self) -> Option<&RawString> {
+        self.suffix.as_ref()
+    }
+
+    pub(crate) fn suffix_encode(
+        &self,
+        buf: &mut dyn std::fmt::Write,
+        input: Option<&str>,
+        default: &str,
+    ) -> std::fmt::Result {
+        if let Some(suffix) = self.suffix() {
+            suffix.encode_with_default(buf, input, default)
+        } else {
+            write!(buf, "{}", default)
+        }
+    }
+
+    /// Set the suffix.
+    pub fn set_suffix(&mut self, suffix: impl Into<RawString>) {
+        self.suffix = Some(suffix.into());
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        if let Some(prefix) = &mut self.prefix {
+            prefix.despan(input);
+        }
+        if let Some(suffix) = &mut self.suffix {
+            suffix.despan(input);
+        }
+    }
+}
+
+impl std::fmt::Debug for Decor {
+    #[inline]
+    fn fmt(&self, formatter: &mut std::fmt::Formatter<'_>) -> Result<(), std::fmt::Error> {
+        let mut d = formatter.debug_struct("Decor");
+        match &self.prefix {
+            Some(r) => d.field("prefix", r),
+            None => d.field("prefix", &"default"),
+        };
+        match &self.suffix {
+            Some(r) => d.field("suffix", r),
+            None => d.field("suffix", &"default"),
+        };
+        d.finish()
+    }
+}

third-party/vendor/toml_edit/src/ser/array.rs

@@ -0,0 +1,84 @@
+use super::Error;
+
+#[doc(hidden)]
+pub struct SerializeValueArray {
+    values: Vec<crate::Item>,
+}
+
+impl SerializeValueArray {
+    pub(crate) fn new() -> Self {
+        Self { values: Vec::new() }
+    }
+
+    pub(crate) fn with_capacity(len: usize) -> Self {
+        Self {
+            values: Vec::with_capacity(len),
+        }
+    }
+}
+
+impl serde::ser::SerializeSeq for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        let value = value.serialize(super::ValueSerializer {})?;
+        self.values.push(crate::Item::Value(value));
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::Value::Array(crate::Array::with_vec(self.values)))
+    }
+}
+
+impl serde::ser::SerializeTuple for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_element<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleVariant for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}
+
+impl serde::ser::SerializeTupleStruct for SerializeValueArray {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(&mut self, value: &T) -> Result<(), Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        serde::ser::SerializeSeq::serialize_element(self, value)
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        serde::ser::SerializeSeq::end(self)
+    }
+}

third-party/vendor/toml_edit/src/ser/key.rs

@@ -0,0 +1,173 @@
+use crate::InternalString;
+
+use super::Error;
+
+pub(crate) struct KeySerializer;
+
+impl serde::ser::Serializer for KeySerializer {
+    type Ok = InternalString;
+    type Error = Error;
+    type SerializeSeq = serde::ser::Impossible<InternalString, Error>;
+    type SerializeTuple = serde::ser::Impossible<InternalString, Error>;
+    type SerializeTupleStruct = serde::ser::Impossible<InternalString, Error>;
+    type SerializeTupleVariant = serde::ser::Impossible<InternalString, Error>;
+    type SerializeMap = serde::ser::Impossible<InternalString, Error>;
+    type SerializeStruct = serde::ser::Impossible<InternalString, Error>;
+    type SerializeStructVariant = serde::ser::Impossible<InternalString, Error>;
+
+    fn serialize_bool(self, _v: bool) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_i8(self, _v: i8) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_i16(self, _v: i16) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_i32(self, _v: i32) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_i64(self, _v: i64) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_u8(self, _v: u8) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_u16(self, _v: u16) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_u32(self, _v: u32) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_u64(self, _v: u64) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_f32(self, _v: f32) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_f64(self, _v: f64) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_char(self, _v: char) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_str(self, value: &str) -> Result<InternalString, Self::Error> {
+        Ok(InternalString::from(value))
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_none(self) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<InternalString, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_unit(self) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<InternalString, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<InternalString, Self::Error> {
+        Ok(variant.into())
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<InternalString, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<InternalString, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(Error::KeyNotString)
+    }
+}

third-party/vendor/toml_edit/src/ser/map.rs

@@ -0,0 +1,587 @@
+use super::{Error, KeySerializer, ValueSerializer};
+
+#[doc(hidden)]
+pub enum SerializeMap {
+    Datetime(SerializeDatetime),
+    Table(SerializeInlineTable),
+}
+
+impl SerializeMap {
+    pub(crate) fn table() -> Self {
+        Self::Table(SerializeInlineTable::new())
+    }
+
+    pub(crate) fn table_with_capacity(len: usize) -> Self {
+        Self::Table(SerializeInlineTable::with_capacity(len))
+    }
+
+    pub(crate) fn datetime() -> Self {
+        Self::Datetime(SerializeDatetime::new())
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeMap {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_key<T: ?Sized>(&mut self, input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_key(input),
+            Self::Table(s) => s.serialize_key(input),
+        }
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_value(value),
+            Self::Table(s) => s.serialize_value(value),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        match self {
+            Self::Datetime(s) => s.end().map(|items| items.into()),
+            Self::Table(s) => s.end().map(|items| items.into()),
+        }
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeMap {
+    type Ok = crate::Value;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        match self {
+            Self::Datetime(s) => s.serialize_field(key, value),
+            Self::Table(s) => s.serialize_field(key, value),
+        }
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        match self {
+            Self::Datetime(s) => s.end().map(|items| items.into()),
+            Self::Table(s) => s.end().map(|items| items.into()),
+        }
+    }
+}
+
+#[doc(hidden)]
+pub struct SerializeDatetime {
+    value: Option<crate::Datetime>,
+}
+
+impl SerializeDatetime {
+    pub(crate) fn new() -> Self {
+        Self { value: None }
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeDatetime {
+    type Ok = crate::Datetime;
+    type Error = Error;
+
+    fn serialize_key<T: ?Sized>(&mut self, _input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, _value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        unreachable!("datetimes should only be serialized as structs, not maps")
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeDatetime {
+    type Ok = crate::Datetime;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        if key == toml_datetime::__unstable::FIELD {
+            self.value = Some(value.serialize(DatetimeFieldSerializer::default())?);
+        }
+
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        self.value.ok_or(Error::UnsupportedNone)
+    }
+}
+
+#[doc(hidden)]
+pub struct SerializeInlineTable {
+    items: crate::table::KeyValuePairs,
+    key: Option<crate::InternalString>,
+}
+
+impl SerializeInlineTable {
+    pub(crate) fn new() -> Self {
+        Self {
+            items: Default::default(),
+            key: Default::default(),
+        }
+    }
+
+    pub(crate) fn with_capacity(len: usize) -> Self {
+        let mut s = Self::new();
+        s.items.reserve(len);
+        s
+    }
+}
+
+impl serde::ser::SerializeMap for SerializeInlineTable {
+    type Ok = crate::InlineTable;
+    type Error = Error;
+
+    fn serialize_key<T: ?Sized>(&mut self, input: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        self.key = None;
+        self.key = Some(input.serialize(KeySerializer)?);
+        Ok(())
+    }
+
+    fn serialize_value<T: ?Sized>(&mut self, value: &T) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        let mut value_serializer = MapValueSerializer::new();
+        let res = value.serialize(&mut value_serializer);
+        match res {
+            Ok(item) => {
+                let key = self.key.take().unwrap();
+                let kv = crate::table::TableKeyValue::new(
+                    crate::Key::new(&key),
+                    crate::Item::Value(item),
+                );
+                self.items.insert(key, kv);
+            }
+            Err(e) => {
+                if !(e == Error::UnsupportedNone && value_serializer.is_none) {
+                    return Err(e);
+                }
+            }
+        }
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::InlineTable::with_pairs(self.items))
+    }
+}
+
+impl serde::ser::SerializeStruct for SerializeInlineTable {
+    type Ok = crate::InlineTable;
+    type Error = Error;
+
+    fn serialize_field<T: ?Sized>(
+        &mut self,
+        key: &'static str,
+        value: &T,
+    ) -> Result<(), Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        let mut value_serializer = MapValueSerializer::new();
+        let res = value.serialize(&mut value_serializer);
+        match res {
+            Ok(item) => {
+                let kv = crate::table::TableKeyValue::new(
+                    crate::Key::new(key),
+                    crate::Item::Value(item),
+                );
+                self.items.insert(crate::InternalString::from(key), kv);
+            }
+            Err(e) => {
+                if !(e == Error::UnsupportedNone && value_serializer.is_none) {
+                    return Err(e);
+                }
+            }
+        };
+        Ok(())
+    }
+
+    fn end(self) -> Result<Self::Ok, Self::Error> {
+        Ok(crate::InlineTable::with_pairs(self.items))
+    }
+}
+
+#[derive(Default)]
+struct DatetimeFieldSerializer {}
+
+impl serde::ser::Serializer for DatetimeFieldSerializer {
+    type Ok = toml_datetime::Datetime;
+    type Error = Error;
+    type SerializeSeq = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTuple = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleStruct = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeTupleVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeMap = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStruct = serde::ser::Impossible<Self::Ok, Self::Error>;
+    type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, _value: bool) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_i8(self, _value: i8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_i16(self, _value: i16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_i32(self, _value: i32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_i64(self, _value: i64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_u8(self, _value: u8) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_u16(self, _value: u16) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_u32(self, _value: u32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_u64(self, _value: u64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_f32(self, _value: f32) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_f64(self, _value: f64) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_char(self, _value: char) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        v.parse::<toml_datetime::Datetime>().map_err(Error::custom)
+    }
+
+    fn serialize_bytes(self, _value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_some<T: ?Sized>(self, _value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_unit_struct(self, _name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_seq(self, _len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_tuple(self, _len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_map(self, _len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_struct(
+        self,
+        _name: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(Error::DateInvalid)
+    }
+}
+
+#[derive(Default)]
+struct MapValueSerializer {
+    is_none: bool,
+}
+
+impl MapValueSerializer {
+    fn new() -> Self {
+        Self { is_none: false }
+    }
+}
+
+impl serde::ser::Serializer for &mut MapValueSerializer {
+    type Ok = crate::Value;
+    type Error = Error;
+    type SerializeSeq = super::SerializeValueArray;
+    type SerializeTuple = super::SerializeValueArray;
+    type SerializeTupleStruct = super::SerializeValueArray;
+    type SerializeTupleVariant = super::SerializeValueArray;
+    type SerializeMap = super::SerializeMap;
+    type SerializeStruct = super::SerializeMap;
+    type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_bool(v)
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i8(v)
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i16(v)
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i32(v)
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_i64(v)
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u8(v)
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u16(v)
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u32(v)
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_u64(v)
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_f32(v)
+    }
+
+    fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_f64(v)
+    }
+
+    fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_char(v)
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_str(v)
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_bytes(value)
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        self.is_none = true;
+        Err(Error::UnsupportedNone)
+    }
+
+    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        ValueSerializer::new().serialize_some(value)
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit()
+    }
+
+    fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit_struct(name)
+    }
+
+    fn serialize_unit_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        ValueSerializer::new().serialize_unit_variant(name, variant_index, variant)
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        ValueSerializer::new().serialize_newtype_struct(name, value)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        ValueSerializer::new().serialize_newtype_variant(name, variant_index, variant, value)
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        ValueSerializer::new().serialize_seq(len)
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        ValueSerializer::new().serialize_tuple(len)
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        ValueSerializer::new().serialize_tuple_struct(name, len)
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        ValueSerializer::new().serialize_tuple_variant(name, variant_index, variant, len)
+    }
+
+    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        ValueSerializer::new().serialize_map(len)
+    }
+
+    fn serialize_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        ValueSerializer::new().serialize_struct(name, len)
+    }
+
+    fn serialize_struct_variant(
+        self,
+        name: &'static str,
+        variant_index: u32,
+        variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        ValueSerializer::new().serialize_struct_variant(name, variant_index, variant, len)
+    }
+}

third-party/vendor/toml_edit/src/ser/mod.rs

@@ -0,0 +1,165 @@
+//! Serializing Rust structures into TOML.
+//!
+//! This module contains all the Serde support for serializing Rust structures into TOML.
+
+mod array;
+mod key;
+mod map;
+mod pretty;
+mod value;
+
+pub(crate) use array::*;
+pub(crate) use key::*;
+pub(crate) use map::*;
+
+use crate::visit_mut::VisitMut;
+
+/// Errors that can occur when deserializing a type.
+#[derive(Debug, Clone, PartialEq, Eq)]
+#[non_exhaustive]
+pub enum Error {
+    /// Type could not be serialized to TOML
+    UnsupportedType(Option<&'static str>),
+    /// Value was out of range for the given type
+    OutOfRange(Option<&'static str>),
+    /// `None` could not be serialized to TOML
+    UnsupportedNone,
+    /// Key was not convertible to `String` for serializing to TOML
+    KeyNotString,
+    /// A serialized date was invalid
+    DateInvalid,
+    /// Other serialization error
+    Custom(String),
+}
+
+impl Error {
+    pub(crate) fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Error::Custom(msg.to_string())
+    }
+}
+
+impl serde::ser::Error for Error {
+    fn custom<T>(msg: T) -> Self
+    where
+        T: std::fmt::Display,
+    {
+        Self::custom(msg)
+    }
+}
+
+impl std::fmt::Display for Error {
+    fn fmt(&self, formatter: &mut std::fmt::Formatter) -> std::fmt::Result {
+        match self {
+            Self::UnsupportedType(Some(t)) => write!(formatter, "unsupported {t} type"),
+            Self::UnsupportedType(None) => write!(formatter, "unsupported rust type"),
+            Self::OutOfRange(Some(t)) => write!(formatter, "out-of-range value for {t} type"),
+            Self::OutOfRange(None) => write!(formatter, "out-of-range value"),
+            Self::UnsupportedNone => "unsupported None value".fmt(formatter),
+            Self::KeyNotString => "map key was not a string".fmt(formatter),
+            Self::DateInvalid => "a serialized date was invalid".fmt(formatter),
+            Self::Custom(s) => s.fmt(formatter),
+        }
+    }
+}
+
+impl From<crate::TomlError> for Error {
+    fn from(e: crate::TomlError) -> Error {
+        Self::custom(e)
+    }
+}
+
+impl From<Error> for crate::TomlError {
+    fn from(e: Error) -> crate::TomlError {
+        Self::custom(e.to_string(), None)
+    }
+}
+
+impl std::error::Error for Error {}
+
+/// Serialize the given data structure as a TOML byte vector.
+///
+/// Serialization can fail if `T`'s implementation of `Serialize` decides to
+/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
+/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
+pub fn to_vec<T: ?Sized>(value: &T) -> Result<Vec<u8>, Error>
+where
+    T: serde::ser::Serialize,
+{
+    to_string(value).map(|e| e.into_bytes())
+}
+
+/// Serialize the given data structure as a String of TOML.
+///
+/// Serialization can fail if `T`'s implementation of `Serialize` decides to
+/// fail, if `T` contains a map with non-string keys, or if `T` attempts to
+/// serialize an unsupported datatype such as an enum, tuple, or tuple struct.
+///
+/// # Examples
+///
+/// ```
+/// use serde::Serialize;
+///
+/// #[derive(Serialize)]
+/// struct Config {
+///     database: Database,
+/// }
+///
+/// #[derive(Serialize)]
+/// struct Database {
+///     ip: String,
+///     port: Vec<u16>,
+///     connection_max: u32,
+///     enabled: bool,
+/// }
+///
+/// let config = Config {
+///     database: Database {
+///         ip: "192.168.1.1".to_string(),
+///         port: vec![8001, 8002, 8003],
+///         connection_max: 5000,
+///         enabled: false,
+///     },
+/// };
+///
+/// let toml = toml_edit::ser::to_string(&config).unwrap();
+/// println!("{}", toml)
+/// ```
+pub fn to_string<T: ?Sized>(value: &T) -> Result<String, Error>
+where
+    T: serde::ser::Serialize,
+{
+    to_document(value).map(|e| e.to_string())
+}
+
+/// Serialize the given data structure as a "pretty" String of TOML.
+///
+/// This is identical to `to_string` except the output string has a more
+/// "pretty" output. See `ValueSerializer::pretty` for more details.
+pub fn to_string_pretty<T: ?Sized>(value: &T) -> Result<String, Error>
+where
+    T: serde::ser::Serialize,
+{
+    let mut document = to_document(value)?;
+    pretty::Pretty.visit_document_mut(&mut document);
+    Ok(document.to_string())
+}
+
+/// Serialize the given data structure into a TOML document.
+///
+/// This would allow custom formatting to be applied, mixing with format preserving edits, etc.
+pub fn to_document<T: ?Sized>(value: &T) -> Result<crate::Document, Error>
+where
+    T: serde::ser::Serialize,
+{
+    let value = value.serialize(ValueSerializer::new())?;
+    let item = crate::Item::Value(value);
+    let root = item
+        .into_table()
+        .map_err(|_| Error::UnsupportedType(None))?;
+    Ok(root.into())
+}
+
+pub use value::ValueSerializer;

third-party/vendor/toml_edit/src/ser/pretty.rs

@@ -0,0 +1,45 @@
+pub(crate) struct Pretty;
+
+impl crate::visit_mut::VisitMut for Pretty {
+    fn visit_document_mut(&mut self, node: &mut crate::Document) {
+        crate::visit_mut::visit_document_mut(self, node);
+    }
+
+    fn visit_item_mut(&mut self, node: &mut crate::Item) {
+        node.make_item();
+
+        crate::visit_mut::visit_item_mut(self, node);
+    }
+
+    fn visit_table_mut(&mut self, node: &mut crate::Table) {
+        node.decor_mut().clear();
+
+        // Empty tables could be semantically meaningful, so make sure they are not implicit
+        if !node.is_empty() {
+            node.set_implicit(true);
+        }
+
+        crate::visit_mut::visit_table_mut(self, node);
+    }
+
+    fn visit_value_mut(&mut self, node: &mut crate::Value) {
+        node.decor_mut().clear();
+
+        crate::visit_mut::visit_value_mut(self, node);
+    }
+
+    fn visit_array_mut(&mut self, node: &mut crate::Array) {
+        crate::visit_mut::visit_array_mut(self, node);
+
+        if (0..=1).contains(&node.len()) {
+            node.set_trailing("");
+            node.set_trailing_comma(false);
+        } else {
+            for item in node.iter_mut() {
+                item.decor_mut().set_prefix("\n    ");
+            }
+            node.set_trailing("\n");
+            node.set_trailing_comma(true);
+        }
+    }
+}

third-party/vendor/toml_edit/src/ser/value.rs

@@ -0,0 +1,243 @@
+use super::Error;
+
+/// Serialization for TOML [values][crate::Value].
+///
+/// This structure implements serialization support for TOML to serialize an
+/// arbitrary type to TOML. Note that the TOML format does not support all
+/// datatypes in Rust, such as enums, tuples, and tuple structs. These types
+/// will generate an error when serialized.
+///
+/// Currently a serializer always writes its output to an in-memory `String`,
+/// which is passed in when creating the serializer itself.
+///
+/// # Examples
+///
+/// ```
+/// use serde::Serialize;
+///
+/// #[derive(Serialize)]
+/// struct Config {
+///     database: Database,
+/// }
+///
+/// #[derive(Serialize)]
+/// struct Database {
+///     ip: String,
+///     port: Vec<u16>,
+///     connection_max: u32,
+///     enabled: bool,
+/// }
+///
+/// let config = Config {
+///     database: Database {
+///         ip: "192.168.1.1".to_string(),
+///         port: vec![8001, 8002, 8003],
+///         connection_max: 5000,
+///         enabled: false,
+///     },
+/// };
+///
+/// let value = serde::Serialize::serialize(
+///     &config,
+///     toml_edit::ser::ValueSerializer::new()
+/// ).unwrap();
+/// println!("{}", value)
+/// ```
+#[derive(Default)]
+#[non_exhaustive]
+pub struct ValueSerializer {}
+
+impl ValueSerializer {
+    /// Creates a new serializer generate a TOML document.
+    pub fn new() -> Self {
+        Self {}
+    }
+}
+
+impl serde::ser::Serializer for ValueSerializer {
+    type Ok = crate::Value;
+    type Error = Error;
+    type SerializeSeq = super::SerializeValueArray;
+    type SerializeTuple = super::SerializeValueArray;
+    type SerializeTupleStruct = super::SerializeValueArray;
+    type SerializeTupleVariant = super::SerializeValueArray;
+    type SerializeMap = super::SerializeMap;
+    type SerializeStruct = super::SerializeMap;
+    type SerializeStructVariant = serde::ser::Impossible<Self::Ok, Self::Error>;
+
+    fn serialize_bool(self, v: bool) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_i8(self, v: i8) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i16(self, v: i16) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i32(self, v: i32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_i64(self, v: i64) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_u8(self, v: u8) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u16(self, v: u16) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u32(self, v: u32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_i64(v as i64)
+    }
+
+    fn serialize_u64(self, v: u64) -> Result<Self::Ok, Self::Error> {
+        let v: i64 = v
+            .try_into()
+            .map_err(|_err| Error::OutOfRange(Some("u64")))?;
+        self.serialize_i64(v)
+    }
+
+    fn serialize_f32(self, v: f32) -> Result<Self::Ok, Self::Error> {
+        self.serialize_f64(v as f64)
+    }
+
+    fn serialize_f64(self, v: f64) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_char(self, v: char) -> Result<Self::Ok, Self::Error> {
+        let mut buf = [0; 4];
+        self.serialize_str(v.encode_utf8(&mut buf))
+    }
+
+    fn serialize_str(self, v: &str) -> Result<Self::Ok, Self::Error> {
+        Ok(v.into())
+    }
+
+    fn serialize_bytes(self, value: &[u8]) -> Result<Self::Ok, Self::Error> {
+        use serde::ser::Serialize;
+        value.serialize(self)
+    }
+
+    fn serialize_none(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::UnsupportedNone)
+    }
+
+    fn serialize_some<T: ?Sized>(self, value: &T) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_unit(self) -> Result<Self::Ok, Self::Error> {
+        Err(Error::UnsupportedType(Some("unit")))
+    }
+
+    fn serialize_unit_struct(self, name: &'static str) -> Result<Self::Ok, Self::Error> {
+        Err(Error::UnsupportedType(Some(name)))
+    }
+
+    fn serialize_unit_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+    ) -> Result<Self::Ok, Self::Error> {
+        self.serialize_str(variant)
+    }
+
+    fn serialize_newtype_struct<T: ?Sized>(
+        self,
+        _name: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        value.serialize(self)
+    }
+
+    fn serialize_newtype_variant<T: ?Sized>(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        variant: &'static str,
+        value: &T,
+    ) -> Result<Self::Ok, Self::Error>
+    where
+        T: serde::ser::Serialize,
+    {
+        let value = value.serialize(self)?;
+        let mut table = crate::InlineTable::new();
+        table.insert(variant, value);
+        Ok(table.into())
+    }
+
+    fn serialize_seq(self, len: Option<usize>) -> Result<Self::SerializeSeq, Self::Error> {
+        let serializer = match len {
+            Some(len) => super::SerializeValueArray::with_capacity(len),
+            None => super::SerializeValueArray::new(),
+        };
+        Ok(serializer)
+    }
+
+    fn serialize_tuple(self, len: usize) -> Result<Self::SerializeTuple, Self::Error> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_struct(
+        self,
+        _name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleStruct, Self::Error> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_tuple_variant(
+        self,
+        _name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeTupleVariant, Self::Error> {
+        self.serialize_seq(Some(len))
+    }
+
+    fn serialize_map(self, len: Option<usize>) -> Result<Self::SerializeMap, Self::Error> {
+        let serializer = match len {
+            Some(len) => super::SerializeMap::table_with_capacity(len),
+            None => super::SerializeMap::table(),
+        };
+        Ok(serializer)
+    }
+
+    fn serialize_struct(
+        self,
+        name: &'static str,
+        len: usize,
+    ) -> Result<Self::SerializeStruct, Self::Error> {
+        if name == toml_datetime::__unstable::NAME {
+            Ok(super::SerializeMap::datetime())
+        } else {
+            self.serialize_map(Some(len))
+        }
+    }
+
+    fn serialize_struct_variant(
+        self,
+        name: &'static str,
+        _variant_index: u32,
+        _variant: &'static str,
+        _len: usize,
+    ) -> Result<Self::SerializeStructVariant, Self::Error> {
+        Err(Error::UnsupportedType(Some(name)))
+    }
+}

third-party/vendor/toml_edit/src/table.rs

@@ -0,0 +1,757 @@
+use std::iter::FromIterator;
+
+use indexmap::map::IndexMap;
+
+use crate::key::Key;
+use crate::repr::Decor;
+use crate::value::DEFAULT_VALUE_DECOR;
+use crate::{InlineTable, InternalString, Item, KeyMut, Value};
+
+/// Type representing a TOML non-inline table
+#[derive(Clone, Debug, Default)]
+pub struct Table {
+    // Comments/spaces before and after the header
+    pub(crate) decor: Decor,
+    // Whether to hide an empty table
+    pub(crate) implicit: bool,
+    // Whether this is a proxy for dotted keys
+    pub(crate) dotted: bool,
+    // Used for putting tables back in their original order when serialising.
+    //
+    // `None` for user created tables (can be overridden with `set_position`)
+    doc_position: Option<usize>,
+    pub(crate) span: Option<std::ops::Range<usize>>,
+    pub(crate) items: KeyValuePairs,
+}
+
+/// Constructors
+///
+/// See also `FromIterator`
+impl Table {
+    /// Creates an empty table.
+    pub fn new() -> Self {
+        Default::default()
+    }
+
+    pub(crate) fn with_pos(doc_position: Option<usize>) -> Self {
+        Self {
+            doc_position,
+            ..Default::default()
+        }
+    }
+
+    pub(crate) fn with_pairs(items: KeyValuePairs) -> Self {
+        Self {
+            items,
+            ..Default::default()
+        }
+    }
+
+    /// Convert to an inline table
+    pub fn into_inline_table(mut self) -> InlineTable {
+        for (_, kv) in self.items.iter_mut() {
+            kv.value.make_value();
+        }
+        let mut t = InlineTable::with_pairs(self.items);
+        t.fmt();
+        t
+    }
+}
+
+/// Formatting
+impl Table {
+    /// Get key/values for values that are visually children of this table
+    ///
+    /// For example, this will return dotted keys
+    pub fn get_values(&self) -> Vec<(Vec<&Key>, &Value)> {
+        let mut values = Vec::new();
+        let root = Vec::new();
+        self.append_values(&root, &mut values);
+        values
+    }
+
+    fn append_values<'s, 'c>(
+        &'s self,
+        parent: &[&'s Key],
+        values: &'c mut Vec<(Vec<&'s Key>, &'s Value)>,
+    ) {
+        for value in self.items.values() {
+            let mut path = parent.to_vec();
+            path.push(&value.key);
+            match &value.value {
+                Item::Table(table) if table.is_dotted() => {
+                    table.append_values(&path, values);
+                }
+                Item::Value(value) => {
+                    if let Some(table) = value.as_inline_table() {
+                        if table.is_dotted() {
+                            table.append_values(&path, values);
+                        } else {
+                            values.push((path, value));
+                        }
+                    } else {
+                        values.push((path, value));
+                    }
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// Auto formats the table.
+    pub fn fmt(&mut self) {
+        decorate_table(self);
+    }
+
+    /// Sorts Key/Value Pairs of the table.
+    ///
+    /// Doesn't affect subtables or subarrays.
+    pub fn sort_values(&mut self) {
+        // Assuming standard tables have their doc_position set and this won't negatively impact them
+        self.items.sort_keys();
+        for kv in self.items.values_mut() {
+            match &mut kv.value {
+                Item::Table(table) if table.is_dotted() => {
+                    table.sort_values();
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// Sort Key/Value Pairs of the table using the using the comparison function `compare`.
+    ///
+    /// The comparison function receives two key and value pairs to compare (you can sort by keys or
+    /// values or their combination as needed).
+    pub fn sort_values_by<F>(&mut self, mut compare: F)
+    where
+        F: FnMut(&Key, &Item, &Key, &Item) -> std::cmp::Ordering,
+    {
+        self.sort_values_by_internal(&mut compare);
+    }
+
+    fn sort_values_by_internal<F>(&mut self, compare: &mut F)
+    where
+        F: FnMut(&Key, &Item, &Key, &Item) -> std::cmp::Ordering,
+    {
+        let modified_cmp = |_: &InternalString,
+                            val1: &TableKeyValue,
+                            _: &InternalString,
+                            val2: &TableKeyValue|
+         -> std::cmp::Ordering {
+            compare(&val1.key, &val1.value, &val2.key, &val2.value)
+        };
+
+        self.items.sort_by(modified_cmp);
+
+        for kv in self.items.values_mut() {
+            match &mut kv.value {
+                Item::Table(table) if table.is_dotted() => {
+                    table.sort_values_by_internal(compare);
+                }
+                _ => {}
+            }
+        }
+    }
+
+    /// If a table has no key/value pairs and implicit, it will not be displayed.
+    ///
+    /// # Examples
+    ///
+    /// ```notrust
+    /// [target."x86_64/windows.json".dependencies]
+    /// ```
+    ///
+    /// In the document above, tables `target` and `target."x86_64/windows.json"` are implicit.
+    ///
+    /// ```
+    /// use toml_edit::Document;
+    /// let mut doc = "[a]\n[a.b]\n".parse::<Document>().expect("invalid toml");
+    ///
+    /// doc["a"].as_table_mut().unwrap().set_implicit(true);
+    /// assert_eq!(doc.to_string(), "[a.b]\n");
+    /// ```
+    pub fn set_implicit(&mut self, implicit: bool) {
+        self.implicit = implicit;
+    }
+
+    /// If a table has no key/value pairs and implicit, it will not be displayed.
+    pub fn is_implicit(&self) -> bool {
+        self.implicit
+    }
+
+    /// Change this table's dotted status
+    pub fn set_dotted(&mut self, yes: bool) {
+        self.dotted = yes;
+    }
+
+    /// Check if this is a wrapper for dotted keys, rather than a standard table
+    pub fn is_dotted(&self) -> bool {
+        self.dotted
+    }
+
+    /// Sets the position of the `Table` within the `Document`.
+    pub fn set_position(&mut self, doc_position: usize) {
+        self.doc_position = Some(doc_position);
+    }
+
+    /// The position of the `Table` within the `Document`.
+    ///
+    /// Returns `None` if the `Table` was created manually (i.e. not via parsing)
+    /// in which case its position is set automatically.  This can be overridden with
+    /// [`Table::set_position`].
+    pub fn position(&self) -> Option<usize> {
+        self.doc_position
+    }
+
+    /// Returns the surrounding whitespace
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        &mut self.decor
+    }
+
+    /// Returns the decor associated with a given key of the table.
+    pub fn decor(&self) -> &Decor {
+        &self.decor
+    }
+
+    /// Returns the decor associated with a given key of the table.
+    pub fn key_decor_mut(&mut self, key: &str) -> Option<&mut Decor> {
+        self.items.get_mut(key).map(|kv| &mut kv.key.decor)
+    }
+
+    /// Returns the decor associated with a given key of the table.
+    pub fn key_decor(&self, key: &str) -> Option<&Decor> {
+        self.items.get(key).map(|kv| &kv.key.decor)
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        self.span.clone()
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        self.span = None;
+        self.decor.despan(input);
+        for kv in self.items.values_mut() {
+            kv.key.despan(input);
+            kv.value.despan(input);
+        }
+    }
+}
+
+impl Table {
+    /// Returns an iterator over all key/value pairs, including empty.
+    pub fn iter(&self) -> Iter<'_> {
+        Box::new(
+            self.items
+                .iter()
+                .filter(|(_, kv)| !kv.value.is_none())
+                .map(|(key, kv)| (&key[..], &kv.value)),
+        )
+    }
+
+    /// Returns an mutable iterator over all key/value pairs, including empty.
+    pub fn iter_mut(&mut self) -> IterMut<'_> {
+        Box::new(
+            self.items
+                .iter_mut()
+                .filter(|(_, kv)| !kv.value.is_none())
+                .map(|(_, kv)| (kv.key.as_mut(), &mut kv.value)),
+        )
+    }
+
+    /// Returns the number of non-empty items in the table.
+    pub fn len(&self) -> usize {
+        self.items.iter().filter(|i| !(i.1).value.is_none()).count()
+    }
+
+    /// Returns true if the table is empty.
+    pub fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+
+    /// Clears the table, removing all key-value pairs. Keeps the allocated memory for reuse.
+    pub fn clear(&mut self) {
+        self.items.clear()
+    }
+
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    pub fn entry<'a>(&'a mut self, key: &str) -> Entry<'a> {
+        // Accept a `&str` rather than an owned type to keep `InternalString`, well, internal
+        match self.items.entry(key.into()) {
+            indexmap::map::Entry::Occupied(entry) => Entry::Occupied(OccupiedEntry { entry }),
+            indexmap::map::Entry::Vacant(entry) => Entry::Vacant(VacantEntry { entry, key: None }),
+        }
+    }
+
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    pub fn entry_format<'a>(&'a mut self, key: &Key) -> Entry<'a> {
+        // Accept a `&Key` to be consistent with `entry`
+        match self.items.entry(key.get().into()) {
+            indexmap::map::Entry::Occupied(entry) => Entry::Occupied(OccupiedEntry { entry }),
+            indexmap::map::Entry::Vacant(entry) => Entry::Vacant(VacantEntry {
+                entry,
+                key: Some(key.to_owned()),
+            }),
+        }
+    }
+
+    /// Returns an optional reference to an item given the key.
+    pub fn get<'a>(&'a self, key: &str) -> Option<&'a Item> {
+        self.items.get(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some(&kv.value)
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Returns an optional mutable reference to an item given the key.
+    pub fn get_mut<'a>(&'a mut self, key: &str) -> Option<&'a mut Item> {
+        self.items.get_mut(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some(&mut kv.value)
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Return references to the key-value pair stored for key, if it is present, else None.
+    pub fn get_key_value<'a>(&'a self, key: &str) -> Option<(&'a Key, &'a Item)> {
+        self.items.get(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some((&kv.key, &kv.value))
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Return mutable references to the key-value pair stored for key, if it is present, else None.
+    pub fn get_key_value_mut<'a>(&'a mut self, key: &str) -> Option<(KeyMut<'a>, &'a mut Item)> {
+        self.items.get_mut(key).and_then(|kv| {
+            if !kv.value.is_none() {
+                Some((kv.key.as_mut(), &mut kv.value))
+            } else {
+                None
+            }
+        })
+    }
+
+    /// Returns true if the table contains an item with the given key.
+    pub fn contains_key(&self, key: &str) -> bool {
+        if let Some(kv) = self.items.get(key) {
+            !kv.value.is_none()
+        } else {
+            false
+        }
+    }
+
+    /// Returns true if the table contains a table with the given key.
+    pub fn contains_table(&self, key: &str) -> bool {
+        if let Some(kv) = self.items.get(key) {
+            kv.value.is_table()
+        } else {
+            false
+        }
+    }
+
+    /// Returns true if the table contains a value with the given key.
+    pub fn contains_value(&self, key: &str) -> bool {
+        if let Some(kv) = self.items.get(key) {
+            kv.value.is_value()
+        } else {
+            false
+        }
+    }
+
+    /// Returns true if the table contains an array of tables with the given key.
+    pub fn contains_array_of_tables(&self, key: &str) -> bool {
+        if let Some(kv) = self.items.get(key) {
+            kv.value.is_array_of_tables()
+        } else {
+            false
+        }
+    }
+
+    /// Inserts a key-value pair into the map.
+    pub fn insert(&mut self, key: &str, item: Item) -> Option<Item> {
+        let kv = TableKeyValue::new(Key::new(key), item);
+        self.items.insert(key.into(), kv).map(|kv| kv.value)
+    }
+
+    /// Inserts a key-value pair into the map.
+    pub fn insert_formatted(&mut self, key: &Key, item: Item) -> Option<Item> {
+        let kv = TableKeyValue::new(key.to_owned(), item);
+        self.items.insert(key.get().into(), kv).map(|kv| kv.value)
+    }
+
+    /// Removes an item given the key.
+    pub fn remove(&mut self, key: &str) -> Option<Item> {
+        self.items.shift_remove(key).map(|kv| kv.value)
+    }
+
+    /// Removes a key from the map, returning the stored key and value if the key was previously in the map.
+    pub fn remove_entry(&mut self, key: &str) -> Option<(Key, Item)> {
+        self.items.shift_remove(key).map(|kv| (kv.key, kv.value))
+    }
+
+    /// Retains only the elements specified by the `keep` predicate.
+    ///
+    /// In other words, remove all pairs `(key, item)` for which
+    /// `keep(&key, &mut item)` returns `false`.
+    ///
+    /// The elements are visited in iteration order.
+    pub fn retain<F>(&mut self, mut keep: F)
+    where
+        F: FnMut(&str, &mut Item) -> bool,
+    {
+        self.items
+            .retain(|key, key_value| keep(key, &mut key_value.value));
+    }
+}
+
+impl std::fmt::Display for Table {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        use crate::encode::Encode;
+        let children = self.get_values();
+        // print table body
+        for (key_path, value) in children {
+            key_path.as_slice().encode(f, None, DEFAULT_KEY_DECOR)?;
+            write!(f, "=")?;
+            value.encode(f, None, DEFAULT_VALUE_DECOR)?;
+            writeln!(f)?;
+        }
+        Ok(())
+    }
+}
+
+impl<K: Into<Key>, V: Into<Value>> Extend<(K, V)> for Table {
+    fn extend<T: IntoIterator<Item = (K, V)>>(&mut self, iter: T) {
+        for (key, value) in iter {
+            let key = key.into();
+            let value = Item::Value(value.into());
+            let value = TableKeyValue::new(key, value);
+            self.items.insert(value.key.get().into(), value);
+        }
+    }
+}
+
+impl<K: Into<Key>, V: Into<Value>> FromIterator<(K, V)> for Table {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = (K, V)>,
+    {
+        let mut table = Table::new();
+        table.extend(iter);
+        table
+    }
+}
+
+impl IntoIterator for Table {
+    type Item = (InternalString, Item);
+    type IntoIter = IntoIter;
+
+    fn into_iter(self) -> Self::IntoIter {
+        Box::new(self.items.into_iter().map(|(k, kv)| (k, kv.value)))
+    }
+}
+
+impl<'s> IntoIterator for &'s Table {
+    type Item = (&'s str, &'s Item);
+    type IntoIter = Iter<'s>;
+
+    fn into_iter(self) -> Self::IntoIter {
+        self.iter()
+    }
+}
+
+pub(crate) type KeyValuePairs = IndexMap<InternalString, TableKeyValue>;
+
+fn decorate_table(table: &mut Table) {
+    for (key_decor, value) in table
+        .items
+        .iter_mut()
+        .filter(|&(_, ref kv)| kv.value.is_value())
+        .map(|(_, kv)| (&mut kv.key.decor, kv.value.as_value_mut().unwrap()))
+    {
+        key_decor.clear();
+        value.decor_mut().clear();
+    }
+}
+
+// `key1 = value1`
+pub(crate) const DEFAULT_KEY_DECOR: (&str, &str) = ("", " ");
+pub(crate) const DEFAULT_TABLE_DECOR: (&str, &str) = ("\n", "");
+pub(crate) const DEFAULT_KEY_PATH_DECOR: (&str, &str) = ("", "");
+
+#[derive(Debug, Clone)]
+pub(crate) struct TableKeyValue {
+    pub(crate) key: Key,
+    pub(crate) value: Item,
+}
+
+impl TableKeyValue {
+    pub(crate) fn new(key: Key, value: Item) -> Self {
+        TableKeyValue { key, value }
+    }
+}
+
+/// An owned iterator type over `Table`'s key/value pairs.
+pub type IntoIter = Box<dyn Iterator<Item = (InternalString, Item)>>;
+/// An iterator type over `Table`'s key/value pairs.
+pub type Iter<'a> = Box<dyn Iterator<Item = (&'a str, &'a Item)> + 'a>;
+/// A mutable iterator type over `Table`'s key/value pairs.
+pub type IterMut<'a> = Box<dyn Iterator<Item = (KeyMut<'a>, &'a mut Item)> + 'a>;
+
+/// This trait represents either a `Table`, or an `InlineTable`.
+pub trait TableLike: crate::private::Sealed {
+    /// Returns an iterator over key/value pairs.
+    fn iter(&self) -> Iter<'_>;
+    /// Returns an mutable iterator over all key/value pairs, including empty.
+    fn iter_mut(&mut self) -> IterMut<'_>;
+    /// Returns the number of nonempty items.
+    fn len(&self) -> usize {
+        self.iter().filter(|&(_, v)| !v.is_none()).count()
+    }
+    /// Returns true if the table is empty.
+    fn is_empty(&self) -> bool {
+        self.len() == 0
+    }
+    /// Clears the table, removing all key-value pairs. Keeps the allocated memory for reuse.
+    fn clear(&mut self);
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    fn entry<'a>(&'a mut self, key: &str) -> Entry<'a>;
+    /// Gets the given key's corresponding entry in the Table for in-place manipulation.
+    fn entry_format<'a>(&'a mut self, key: &Key) -> Entry<'a>;
+    /// Returns an optional reference to an item given the key.
+    fn get<'s>(&'s self, key: &str) -> Option<&'s Item>;
+    /// Returns an optional mutable reference to an item given the key.
+    fn get_mut<'s>(&'s mut self, key: &str) -> Option<&'s mut Item>;
+    /// Return references to the key-value pair stored for key, if it is present, else None.
+    fn get_key_value<'a>(&'a self, key: &str) -> Option<(&'a Key, &'a Item)>;
+    /// Return mutable references to the key-value pair stored for key, if it is present, else None.
+    fn get_key_value_mut<'a>(&'a mut self, key: &str) -> Option<(KeyMut<'a>, &'a mut Item)>;
+    /// Returns true if the table contains an item with the given key.
+    fn contains_key(&self, key: &str) -> bool;
+    /// Inserts a key-value pair into the map.
+    fn insert(&mut self, key: &str, value: Item) -> Option<Item>;
+    /// Removes an item given the key.
+    fn remove(&mut self, key: &str) -> Option<Item>;
+
+    /// Get key/values for values that are visually children of this table
+    ///
+    /// For example, this will return dotted keys
+    fn get_values(&self) -> Vec<(Vec<&Key>, &Value)>;
+
+    /// Auto formats the table.
+    fn fmt(&mut self);
+    /// Sorts Key/Value Pairs of the table.
+    ///
+    /// Doesn't affect subtables or subarrays.
+    fn sort_values(&mut self);
+    /// Change this table's dotted status
+    fn set_dotted(&mut self, yes: bool);
+    /// Check if this is a wrapper for dotted keys, rather than a standard table
+    fn is_dotted(&self) -> bool;
+
+    /// Returns the decor associated with a given key of the table.
+    fn key_decor_mut(&mut self, key: &str) -> Option<&mut Decor>;
+    /// Returns the decor associated with a given key of the table.
+    fn key_decor(&self, key: &str) -> Option<&Decor>;
+}
+
+impl TableLike for Table {
+    fn iter(&self) -> Iter<'_> {
+        self.iter()
+    }
+    fn iter_mut(&mut self) -> IterMut<'_> {
+        self.iter_mut()
+    }
+    fn clear(&mut self) {
+        self.clear();
+    }
+    fn entry<'a>(&'a mut self, key: &str) -> Entry<'a> {
+        self.entry(key)
+    }
+    fn entry_format<'a>(&'a mut self, key: &Key) -> Entry<'a> {
+        self.entry_format(key)
+    }
+    fn get<'s>(&'s self, key: &str) -> Option<&'s Item> {
+        self.get(key)
+    }
+    fn get_mut<'s>(&'s mut self, key: &str) -> Option<&'s mut Item> {
+        self.get_mut(key)
+    }
+    fn get_key_value<'a>(&'a self, key: &str) -> Option<(&'a Key, &'a Item)> {
+        self.get_key_value(key)
+    }
+    fn get_key_value_mut<'a>(&'a mut self, key: &str) -> Option<(KeyMut<'a>, &'a mut Item)> {
+        self.get_key_value_mut(key)
+    }
+    fn contains_key(&self, key: &str) -> bool {
+        self.contains_key(key)
+    }
+    fn insert(&mut self, key: &str, value: Item) -> Option<Item> {
+        self.insert(key, value)
+    }
+    fn remove(&mut self, key: &str) -> Option<Item> {
+        self.remove(key)
+    }
+
+    fn get_values(&self) -> Vec<(Vec<&Key>, &Value)> {
+        self.get_values()
+    }
+    fn fmt(&mut self) {
+        self.fmt()
+    }
+    fn sort_values(&mut self) {
+        self.sort_values()
+    }
+    fn is_dotted(&self) -> bool {
+        self.is_dotted()
+    }
+    fn set_dotted(&mut self, yes: bool) {
+        self.set_dotted(yes)
+    }
+
+    fn key_decor_mut(&mut self, key: &str) -> Option<&mut Decor> {
+        self.key_decor_mut(key)
+    }
+    fn key_decor(&self, key: &str) -> Option<&Decor> {
+        self.key_decor(key)
+    }
+}
+
+/// A view into a single location in a map, which may be vacant or occupied.
+pub enum Entry<'a> {
+    /// An occupied Entry.
+    Occupied(OccupiedEntry<'a>),
+    /// A vacant Entry.
+    Vacant(VacantEntry<'a>),
+}
+
+impl<'a> Entry<'a> {
+    /// Returns the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("hello", map.entry("hello").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        match self {
+            Entry::Occupied(e) => e.key(),
+            Entry::Vacant(e) => e.key(),
+        }
+    }
+
+    /// Ensures a value is in the entry by inserting the default if empty, and returns
+    /// a mutable reference to the value in the entry.
+    pub fn or_insert(self, default: Item) -> &'a mut Item {
+        match self {
+            Entry::Occupied(entry) => entry.into_mut(),
+            Entry::Vacant(entry) => entry.insert(default),
+        }
+    }
+
+    /// Ensures a value is in the entry by inserting the result of the default function if empty,
+    /// and returns a mutable reference to the value in the entry.
+    pub fn or_insert_with<F: FnOnce() -> Item>(self, default: F) -> &'a mut Item {
+        match self {
+            Entry::Occupied(entry) => entry.into_mut(),
+            Entry::Vacant(entry) => entry.insert(default()),
+        }
+    }
+}
+
+/// A view into a single occupied location in a `IndexMap`.
+pub struct OccupiedEntry<'a> {
+    pub(crate) entry: indexmap::map::OccupiedEntry<'a, InternalString, TableKeyValue>,
+}
+
+impl<'a> OccupiedEntry<'a> {
+    /// Gets a reference to the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("foo", map.entry("foo").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        self.entry.key().as_str()
+    }
+
+    /// Gets a mutable reference to the entry key
+    pub fn key_mut(&mut self) -> KeyMut<'_> {
+        self.entry.get_mut().key.as_mut()
+    }
+
+    /// Gets a reference to the value in the entry.
+    pub fn get(&self) -> &Item {
+        &self.entry.get().value
+    }
+
+    /// Gets a mutable reference to the value in the entry.
+    pub fn get_mut(&mut self) -> &mut Item {
+        &mut self.entry.get_mut().value
+    }
+
+    /// Converts the OccupiedEntry into a mutable reference to the value in the entry
+    /// with a lifetime bound to the map itself
+    pub fn into_mut(self) -> &'a mut Item {
+        &mut self.entry.into_mut().value
+    }
+
+    /// Sets the value of the entry, and returns the entry's old value
+    pub fn insert(&mut self, mut value: Item) -> Item {
+        std::mem::swap(&mut value, &mut self.entry.get_mut().value);
+        value
+    }
+
+    /// Takes the value out of the entry, and returns it
+    pub fn remove(self) -> Item {
+        self.entry.shift_remove().value
+    }
+}
+
+/// A view into a single empty location in a `IndexMap`.
+pub struct VacantEntry<'a> {
+    pub(crate) entry: indexmap::map::VacantEntry<'a, InternalString, TableKeyValue>,
+    pub(crate) key: Option<Key>,
+}
+
+impl<'a> VacantEntry<'a> {
+    /// Gets a reference to the entry key
+    ///
+    /// # Examples
+    ///
+    /// ```
+    /// use toml_edit::Table;
+    ///
+    /// let mut map = Table::new();
+    ///
+    /// assert_eq!("foo", map.entry("foo").key());
+    /// ```
+    pub fn key(&self) -> &str {
+        self.entry.key().as_str()
+    }
+
+    /// Sets the value of the entry with the VacantEntry's key,
+    /// and returns a mutable reference to it
+    pub fn insert(self, value: Item) -> &'a mut Item {
+        let entry = self.entry;
+        let key = self.key.unwrap_or_else(|| Key::new(entry.key().as_str()));
+        &mut entry.insert(TableKeyValue::new(key, value)).value
+    }
+}

third-party/vendor/toml_edit/src/value.rs

@@ -0,0 +1,372 @@
+use std::iter::FromIterator;
+use std::str::FromStr;
+
+use toml_datetime::*;
+
+use crate::key::Key;
+use crate::parser;
+use crate::repr::{Decor, Formatted};
+use crate::{Array, InlineTable, InternalString, RawString};
+
+/// Representation of a TOML Value (as part of a Key/Value Pair).
+#[derive(Debug, Clone)]
+pub enum Value {
+    /// A string value.
+    String(Formatted<String>),
+    /// A 64-bit integer value.
+    Integer(Formatted<i64>),
+    /// A 64-bit float value.
+    Float(Formatted<f64>),
+    /// A boolean value.
+    Boolean(Formatted<bool>),
+    /// An RFC 3339 formatted date-time with offset.
+    Datetime(Formatted<Datetime>),
+    /// An inline array of values.
+    Array(Array),
+    /// An inline table of key/value pairs.
+    InlineTable(InlineTable),
+}
+
+/// Downcasting
+impl Value {
+    /// Text description of value type
+    pub fn type_name(&self) -> &'static str {
+        match self {
+            Value::String(..) => "string",
+            Value::Integer(..) => "integer",
+            Value::Float(..) => "float",
+            Value::Boolean(..) => "boolean",
+            Value::Datetime(..) => "datetime",
+            Value::Array(..) => "array",
+            Value::InlineTable(..) => "inline table",
+        }
+    }
+
+    /// Casts `self` to str.
+    pub fn as_str(&self) -> Option<&str> {
+        match *self {
+            Value::String(ref value) => Some(value.value()),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is a string.
+    pub fn is_str(&self) -> bool {
+        self.as_str().is_some()
+    }
+
+    /// Casts `self` to integer.
+    pub fn as_integer(&self) -> Option<i64> {
+        match *self {
+            Value::Integer(ref value) => Some(*value.value()),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is an integer.
+    pub fn is_integer(&self) -> bool {
+        self.as_integer().is_some()
+    }
+
+    /// Casts `self` to float.
+    pub fn as_float(&self) -> Option<f64> {
+        match *self {
+            Value::Float(ref value) => Some(*value.value()),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is a float.
+    pub fn is_float(&self) -> bool {
+        self.as_float().is_some()
+    }
+
+    /// Casts `self` to boolean.
+    pub fn as_bool(&self) -> Option<bool> {
+        match *self {
+            Value::Boolean(ref value) => Some(*value.value()),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is a boolean.
+    pub fn is_bool(&self) -> bool {
+        self.as_bool().is_some()
+    }
+
+    /// Casts `self` to date-time.
+    pub fn as_datetime(&self) -> Option<&Datetime> {
+        match *self {
+            Value::Datetime(ref value) => Some(value.value()),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is a date-time.
+    pub fn is_datetime(&self) -> bool {
+        self.as_datetime().is_some()
+    }
+
+    /// Casts `self` to array.
+    pub fn as_array(&self) -> Option<&Array> {
+        match *self {
+            Value::Array(ref value) => Some(value),
+            _ => None,
+        }
+    }
+
+    /// Casts `self` to mutable array.
+    pub fn as_array_mut(&mut self) -> Option<&mut Array> {
+        match *self {
+            Value::Array(ref mut value) => Some(value),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is an array.
+    pub fn is_array(&self) -> bool {
+        self.as_array().is_some()
+    }
+
+    /// Casts `self` to inline table.
+    pub fn as_inline_table(&self) -> Option<&InlineTable> {
+        match *self {
+            Value::InlineTable(ref value) => Some(value),
+            _ => None,
+        }
+    }
+
+    /// Casts `self` to mutable inline table.
+    pub fn as_inline_table_mut(&mut self) -> Option<&mut InlineTable> {
+        match *self {
+            Value::InlineTable(ref mut value) => Some(value),
+            _ => None,
+        }
+    }
+
+    /// Returns true iff `self` is an inline table.
+    pub fn is_inline_table(&self) -> bool {
+        self.as_inline_table().is_some()
+    }
+}
+
+impl Value {
+    /// Get the decoration of the value.
+    /// # Example
+    /// ```rust
+    /// let v = toml_edit::Value::from(true);
+    /// assert_eq!(v.decor().suffix(), None);
+    ///```
+    pub fn decor_mut(&mut self) -> &mut Decor {
+        match self {
+            Value::String(f) => f.decor_mut(),
+            Value::Integer(f) => f.decor_mut(),
+            Value::Float(f) => f.decor_mut(),
+            Value::Boolean(f) => f.decor_mut(),
+            Value::Datetime(f) => f.decor_mut(),
+            Value::Array(a) => a.decor_mut(),
+            Value::InlineTable(t) => t.decor_mut(),
+        }
+    }
+
+    /// Get the decoration of the value.
+    /// # Example
+    /// ```rust
+    /// let v = toml_edit::Value::from(true);
+    /// assert_eq!(v.decor().suffix(), None);
+    ///```
+    pub fn decor(&self) -> &Decor {
+        match *self {
+            Value::String(ref f) => f.decor(),
+            Value::Integer(ref f) => f.decor(),
+            Value::Float(ref f) => f.decor(),
+            Value::Boolean(ref f) => f.decor(),
+            Value::Datetime(ref f) => f.decor(),
+            Value::Array(ref a) => a.decor(),
+            Value::InlineTable(ref t) => t.decor(),
+        }
+    }
+
+    /// Sets the prefix and the suffix for value.
+    /// # Example
+    /// ```rust
+    /// let mut v = toml_edit::Value::from(42);
+    /// assert_eq!(&v.to_string(), "42");
+    /// let d = v.decorated(" ", " ");
+    /// assert_eq!(&d.to_string(), " 42 ");
+    /// ```
+    pub fn decorated(mut self, prefix: impl Into<RawString>, suffix: impl Into<RawString>) -> Self {
+        self.decorate(prefix, suffix);
+        self
+    }
+
+    pub(crate) fn decorate(&mut self, prefix: impl Into<RawString>, suffix: impl Into<RawString>) {
+        let decor = self.decor_mut();
+        *decor = Decor::new(prefix, suffix);
+    }
+
+    /// Returns the location within the original document
+    pub(crate) fn span(&self) -> Option<std::ops::Range<usize>> {
+        match self {
+            Value::String(f) => f.span(),
+            Value::Integer(f) => f.span(),
+            Value::Float(f) => f.span(),
+            Value::Boolean(f) => f.span(),
+            Value::Datetime(f) => f.span(),
+            Value::Array(a) => a.span(),
+            Value::InlineTable(t) => t.span(),
+        }
+    }
+
+    pub(crate) fn despan(&mut self, input: &str) {
+        match self {
+            Value::String(f) => f.despan(input),
+            Value::Integer(f) => f.despan(input),
+            Value::Float(f) => f.despan(input),
+            Value::Boolean(f) => f.despan(input),
+            Value::Datetime(f) => f.despan(input),
+            Value::Array(a) => a.despan(input),
+            Value::InlineTable(t) => t.despan(input),
+        }
+    }
+}
+
+impl FromStr for Value {
+    type Err = crate::TomlError;
+
+    /// Parses a value from a &str
+    fn from_str(s: &str) -> Result<Self, Self::Err> {
+        parser::parse_value(s)
+    }
+}
+
+impl<'b> From<&'b Value> for Value {
+    fn from(s: &'b Value) -> Self {
+        s.clone()
+    }
+}
+
+impl<'b> From<&'b str> for Value {
+    fn from(s: &'b str) -> Self {
+        s.to_owned().into()
+    }
+}
+
+impl<'b> From<&'b String> for Value {
+    fn from(s: &'b String) -> Self {
+        s.to_owned().into()
+    }
+}
+
+impl From<String> for Value {
+    fn from(s: String) -> Self {
+        Value::String(Formatted::new(s))
+    }
+}
+
+impl<'b> From<&'b InternalString> for Value {
+    fn from(s: &'b InternalString) -> Self {
+        s.as_str().into()
+    }
+}
+
+impl From<InternalString> for Value {
+    fn from(s: InternalString) -> Self {
+        s.as_str().into()
+    }
+}
+
+impl From<i64> for Value {
+    fn from(i: i64) -> Self {
+        Value::Integer(Formatted::new(i))
+    }
+}
+
+impl From<f64> for Value {
+    fn from(f: f64) -> Self {
+        Value::Float(Formatted::new(f))
+    }
+}
+
+impl From<bool> for Value {
+    fn from(b: bool) -> Self {
+        Value::Boolean(Formatted::new(b))
+    }
+}
+
+impl From<Datetime> for Value {
+    fn from(d: Datetime) -> Self {
+        Value::Datetime(Formatted::new(d))
+    }
+}
+
+impl From<Date> for Value {
+    fn from(d: Date) -> Self {
+        let d: Datetime = d.into();
+        d.into()
+    }
+}
+
+impl From<Time> for Value {
+    fn from(d: Time) -> Self {
+        let d: Datetime = d.into();
+        d.into()
+    }
+}
+
+impl From<Array> for Value {
+    fn from(array: Array) -> Self {
+        Value::Array(array)
+    }
+}
+
+impl From<InlineTable> for Value {
+    fn from(table: InlineTable) -> Self {
+        Value::InlineTable(table)
+    }
+}
+
+impl<V: Into<Value>> FromIterator<V> for Value {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = V>,
+    {
+        let array: Array = iter.into_iter().collect();
+        Value::Array(array)
+    }
+}
+
+impl<K: Into<Key>, V: Into<Value>> FromIterator<(K, V)> for Value {
+    fn from_iter<I>(iter: I) -> Self
+    where
+        I: IntoIterator<Item = (K, V)>,
+    {
+        let table: InlineTable = iter.into_iter().collect();
+        Value::InlineTable(table)
+    }
+}
+
+impl std::fmt::Display for Value {
+    fn fmt(&self, f: &mut std::fmt::Formatter<'_>) -> std::fmt::Result {
+        crate::encode::Encode::encode(self, f, None, ("", ""))
+    }
+}
+
+// `key1 = value1`
+pub(crate) const DEFAULT_VALUE_DECOR: (&str, &str) = (" ", "");
+// `{ key = value }`
+pub(crate) const DEFAULT_TRAILING_VALUE_DECOR: (&str, &str) = (" ", " ");
+// `[value1, value2]`
+pub(crate) const DEFAULT_LEADING_VALUE_DECOR: (&str, &str) = ("", "");
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn from_iter_formatting() {
+        let features = vec!["node".to_owned(), "mouth".to_owned()];
+        let features: Value = features.iter().cloned().collect();
+        assert_eq!(features.to_string(), r#"["node", "mouth"]"#);
+    }
+}

third-party/vendor/toml_edit/src/visit.rs

@@ -0,0 +1,236 @@
+#![allow(missing_docs)]
+
+//! Document tree traversal to walk a shared borrow of a document tree.
+//!
+//! Each method of the [`Visit`] trait is a hook that can be overridden
+//! to customize the behavior when mutating the corresponding type of node.
+//! By default, every method recursively visits the substructure of the
+//! input by invoking the right visitor method of each of its fields.
+//!
+//! ```
+//! # use toml_edit::{Item, ArrayOfTables, Table, Value};
+//!
+//! pub trait Visit<'doc> {
+//!     /* ... */
+//!
+//!     fn visit_item(&mut self, i: &'doc Item) {
+//!         visit_item(self, i);
+//!     }
+//!
+//!     /* ... */
+//!     # fn visit_value(&mut self, i: &'doc Value);
+//!     # fn visit_table(&mut self, i: &'doc Table);
+//!     # fn visit_array_of_tables(&mut self, i: &'doc ArrayOfTables);
+//! }
+//!
+//! pub fn visit_item<'doc, V>(v: &mut V, node: &'doc Item)
+//! where
+//!     V: Visit<'doc> + ?Sized,
+//! {
+//!     match node {
+//!         Item::None => {}
+//!         Item::Value(value) => v.visit_value(value),
+//!         Item::Table(table) => v.visit_table(table),
+//!         Item::ArrayOfTables(array) => v.visit_array_of_tables(array),
+//!     }
+//! }
+//! ```
+//!
+//! The API is modeled after [`syn::visit`](https://docs.rs/syn/1/syn/visit).
+//!
+//! # Examples
+//!
+//! This visitor stores every string in the document.
+//!
+//! ```
+//! # use toml_edit::*;
+//! use toml_edit::visit::*;
+//!
+//! #[derive(Default)]
+//! struct StringCollector<'doc> {
+//!     strings: Vec<&'doc str>,
+//! }
+//!
+//! impl<'doc> Visit<'doc> for StringCollector<'doc> {
+//!     fn visit_string(&mut self, node: &'doc Formatted<String>) {
+//!          self.strings.push(node.value().as_str());
+//!     }
+//! }
+//!
+//! let input = r#"
+//! laputa = "sky-castle"
+//! the-force = { value = "surrounds-you" }
+//! "#;
+//!
+//! let mut document: Document = input.parse().unwrap();
+//! let mut visitor = StringCollector::default();
+//! visitor.visit_document(&document);
+//!
+//! assert_eq!(visitor.strings, vec!["sky-castle", "surrounds-you"]);
+//! ```
+//!
+//! For a more complex example where the visitor has internal state, see `examples/visit.rs`
+//! [on GitHub](https://github.com/ordian/toml_edit/blob/master/examples/visit.rs).
+
+use crate::{
+    Array, ArrayOfTables, Datetime, Document, Formatted, InlineTable, Item, Table, TableLike, Value,
+};
+
+/// Document tree traversal to mutate an exclusive borrow of a document tree in-place.
+///
+/// See the [module documentation](self) for details.
+pub trait Visit<'doc> {
+    fn visit_document(&mut self, node: &'doc Document) {
+        visit_document(self, node);
+    }
+
+    fn visit_item(&mut self, node: &'doc Item) {
+        visit_item(self, node);
+    }
+
+    fn visit_table(&mut self, node: &'doc Table) {
+        visit_table(self, node);
+    }
+
+    fn visit_inline_table(&mut self, node: &'doc InlineTable) {
+        visit_inline_table(self, node)
+    }
+
+    fn visit_table_like(&mut self, node: &'doc dyn TableLike) {
+        visit_table_like(self, node);
+    }
+
+    fn visit_table_like_kv(&mut self, key: &'doc str, node: &'doc Item) {
+        visit_table_like_kv(self, key, node);
+    }
+
+    fn visit_array(&mut self, node: &'doc Array) {
+        visit_array(self, node);
+    }
+
+    fn visit_array_of_tables(&mut self, node: &'doc ArrayOfTables) {
+        visit_array_of_tables(self, node);
+    }
+
+    fn visit_value(&mut self, node: &'doc Value) {
+        visit_value(self, node);
+    }
+
+    fn visit_boolean(&mut self, node: &'doc Formatted<bool>) {
+        visit_boolean(self, node)
+    }
+
+    fn visit_datetime(&mut self, node: &'doc Formatted<Datetime>) {
+        visit_datetime(self, node);
+    }
+
+    fn visit_float(&mut self, node: &'doc Formatted<f64>) {
+        visit_float(self, node)
+    }
+
+    fn visit_integer(&mut self, node: &'doc Formatted<i64>) {
+        visit_integer(self, node)
+    }
+
+    fn visit_string(&mut self, node: &'doc Formatted<String>) {
+        visit_string(self, node)
+    }
+}
+
+pub fn visit_document<'doc, V>(v: &mut V, node: &'doc Document)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    v.visit_table(node.as_table());
+}
+
+pub fn visit_item<'doc, V>(v: &mut V, node: &'doc Item)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    match node {
+        Item::None => {}
+        Item::Value(value) => v.visit_value(value),
+        Item::Table(table) => v.visit_table(table),
+        Item::ArrayOfTables(array) => v.visit_array_of_tables(array),
+    }
+}
+
+pub fn visit_table<'doc, V>(v: &mut V, node: &'doc Table)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    v.visit_table_like(node)
+}
+
+pub fn visit_inline_table<'doc, V>(v: &mut V, node: &'doc InlineTable)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    v.visit_table_like(node)
+}
+
+pub fn visit_table_like<'doc, V>(v: &mut V, node: &'doc dyn TableLike)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    for (key, item) in node.iter() {
+        v.visit_table_like_kv(key, item)
+    }
+}
+
+pub fn visit_table_like_kv<'doc, V>(v: &mut V, _key: &'doc str, node: &'doc Item)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    v.visit_item(node)
+}
+
+pub fn visit_array<'doc, V>(v: &mut V, node: &'doc Array)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    for value in node.iter() {
+        v.visit_value(value);
+    }
+}
+
+pub fn visit_array_of_tables<'doc, V>(v: &mut V, node: &'doc ArrayOfTables)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    for table in node.iter() {
+        v.visit_table(table);
+    }
+}
+
+pub fn visit_value<'doc, V>(v: &mut V, node: &'doc Value)
+where
+    V: Visit<'doc> + ?Sized,
+{
+    match node {
+        Value::String(s) => v.visit_string(s),
+        Value::Integer(i) => v.visit_integer(i),
+        Value::Float(f) => v.visit_float(f),
+        Value::Boolean(b) => v.visit_boolean(b),
+        Value::Datetime(dt) => v.visit_datetime(dt),
+        Value::Array(array) => v.visit_array(array),
+        Value::InlineTable(table) => v.visit_inline_table(table),
+    }
+}
+
+macro_rules! empty_visit {
+    ($name: ident, $t: ty) => {
+        fn $name<'doc, V>(_v: &mut V, _node: &'doc $t)
+        where
+            V: Visit<'doc> + ?Sized,
+        {
+        }
+    };
+}
+
+empty_visit!(visit_boolean, Formatted<bool>);
+empty_visit!(visit_datetime, Formatted<Datetime>);
+empty_visit!(visit_float, Formatted<f64>);
+empty_visit!(visit_integer, Formatted<i64>);
+empty_visit!(visit_string, Formatted<String>);

third-party/vendor/toml_edit/src/visit_mut.rs

@@ -0,0 +1,252 @@
+#![allow(missing_docs)]
+
+//! Document tree traversal to mutate an exclusive borrow of a document tree in place.
+//!
+//!
+//! Each method of the [`VisitMut`] trait is a hook that can be overridden
+//! to customize the behavior when mutating the corresponding type of node.
+//! By default, every method recursively visits the substructure of the
+//! input by invoking the right visitor method of each of its fields.
+//!
+//! ```
+//! # use toml_edit::{Item, ArrayOfTables, Table, Value};
+//!
+//! pub trait VisitMut {
+//!     /* ... */
+//!
+//!     fn visit_item_mut(&mut self, i: &mut Item) {
+//!         visit_item_mut(self, i);
+//!     }
+//!
+//!     /* ... */
+//!     # fn visit_value_mut(&mut self, i: &mut Value);
+//!     # fn visit_table_mut(&mut self, i: &mut Table);
+//!     # fn visit_array_of_tables_mut(&mut self, i: &mut ArrayOfTables);
+//! }
+//!
+//! pub fn visit_item_mut<V>(v: &mut V, node: &mut Item)
+//! where
+//!     V: VisitMut + ?Sized,
+//! {
+//!     match node {
+//!         Item::None => {}
+//!         Item::Value(value) => v.visit_value_mut(value),
+//!         Item::Table(table) => v.visit_table_mut(table),
+//!         Item::ArrayOfTables(array) => v.visit_array_of_tables_mut(array),
+//!     }
+//! }
+//! ```
+//!
+//! The API is modeled after [`syn::visit_mut`](https://docs.rs/syn/1/syn/visit_mut).
+//!
+//! # Examples
+//!
+//! This visitor replaces every floating point value with its decimal string representation, to
+//! 2 decimal points.
+//!
+//! ```
+//! # use toml_edit::*;
+//! use toml_edit::visit_mut::*;
+//!
+//! struct FloatToString;
+//!
+//! impl VisitMut for FloatToString {
+//!     fn visit_value_mut(&mut self, node: &mut Value) {
+//!         if let Value::Float(f) = node {
+//!             // Convert the float to a string.
+//!             let mut s = Formatted::new(format!("{:.2}", f.value()));
+//!             // Copy over the formatting.
+//!             std::mem::swap(s.decor_mut(), f.decor_mut());
+//!             *node = Value::String(s);
+//!         }
+//!         // Most of the time, you will also need to call the default implementation to recurse
+//!         // further down the document tree.
+//!         visit_value_mut(self, node);
+//!     }
+//! }
+//!
+//! let input = r#"
+//! banana = 3.26
+//! table = { apple = 4.5 }
+//! "#;
+//!
+//! let mut document: Document = input.parse().unwrap();
+//! let mut visitor = FloatToString;
+//! visitor.visit_document_mut(&mut document);
+//!
+//! let output = r#"
+//! banana = "3.26"
+//! table = { apple = "4.50" }
+//! "#;
+//!
+//! assert_eq!(format!("{}", document), output);
+//! ```
+//!
+//! For a more complex example where the visitor has internal state, see `examples/visit.rs`
+//! [on GitHub](https://github.com/ordian/toml_edit/blob/master/examples/visit.rs).
+
+use crate::{
+    Array, ArrayOfTables, Datetime, Document, Formatted, InlineTable, Item, KeyMut, Table,
+    TableLike, Value,
+};
+
+/// Document tree traversal to mutate an exclusive borrow of a document tree in-place.
+///
+/// See the [module documentation](self) for details.
+pub trait VisitMut {
+    fn visit_document_mut(&mut self, node: &mut Document) {
+        visit_document_mut(self, node);
+    }
+
+    fn visit_item_mut(&mut self, node: &mut Item) {
+        visit_item_mut(self, node);
+    }
+
+    fn visit_table_mut(&mut self, node: &mut Table) {
+        visit_table_mut(self, node);
+    }
+
+    fn visit_inline_table_mut(&mut self, node: &mut InlineTable) {
+        visit_inline_table_mut(self, node)
+    }
+
+    /// [`visit_table_mut`](Self::visit_table_mut) and
+    /// [`visit_inline_table_mut`](Self::visit_inline_table_mut) both recurse into this method.
+    fn visit_table_like_mut(&mut self, node: &mut dyn TableLike) {
+        visit_table_like_mut(self, node);
+    }
+
+    fn visit_table_like_kv_mut(&mut self, key: KeyMut<'_>, node: &mut Item) {
+        visit_table_like_kv_mut(self, key, node);
+    }
+
+    fn visit_array_mut(&mut self, node: &mut Array) {
+        visit_array_mut(self, node);
+    }
+
+    fn visit_array_of_tables_mut(&mut self, node: &mut ArrayOfTables) {
+        visit_array_of_tables_mut(self, node);
+    }
+
+    fn visit_value_mut(&mut self, node: &mut Value) {
+        visit_value_mut(self, node);
+    }
+
+    fn visit_boolean_mut(&mut self, node: &mut Formatted<bool>) {
+        visit_boolean_mut(self, node)
+    }
+
+    fn visit_datetime_mut(&mut self, node: &mut Formatted<Datetime>) {
+        visit_datetime_mut(self, node);
+    }
+
+    fn visit_float_mut(&mut self, node: &mut Formatted<f64>) {
+        visit_float_mut(self, node)
+    }
+
+    fn visit_integer_mut(&mut self, node: &mut Formatted<i64>) {
+        visit_integer_mut(self, node)
+    }
+
+    fn visit_string_mut(&mut self, node: &mut Formatted<String>) {
+        visit_string_mut(self, node)
+    }
+}
+
+pub fn visit_document_mut<V>(v: &mut V, node: &mut Document)
+where
+    V: VisitMut + ?Sized,
+{
+    v.visit_table_mut(node.as_table_mut());
+}
+
+pub fn visit_item_mut<V>(v: &mut V, node: &mut Item)
+where
+    V: VisitMut + ?Sized,
+{
+    match node {
+        Item::None => {}
+        Item::Value(value) => v.visit_value_mut(value),
+        Item::Table(table) => v.visit_table_mut(table),
+        Item::ArrayOfTables(array) => v.visit_array_of_tables_mut(array),
+    }
+}
+
+pub fn visit_table_mut<V>(v: &mut V, node: &mut Table)
+where
+    V: VisitMut + ?Sized,
+{
+    v.visit_table_like_mut(node);
+}
+
+pub fn visit_inline_table_mut<V>(v: &mut V, node: &mut InlineTable)
+where
+    V: VisitMut + ?Sized,
+{
+    v.visit_table_like_mut(node);
+}
+
+pub fn visit_table_like_mut<V>(v: &mut V, node: &mut dyn TableLike)
+where
+    V: VisitMut + ?Sized,
+{
+    for (key, item) in node.iter_mut() {
+        v.visit_table_like_kv_mut(key, item);
+    }
+}
+
+pub fn visit_table_like_kv_mut<V>(v: &mut V, _key: KeyMut<'_>, node: &mut Item)
+where
+    V: VisitMut + ?Sized,
+{
+    v.visit_item_mut(node)
+}
+
+pub fn visit_array_mut<V>(v: &mut V, node: &mut Array)
+where
+    V: VisitMut + ?Sized,
+{
+    for value in node.iter_mut() {
+        v.visit_value_mut(value);
+    }
+}
+
+pub fn visit_array_of_tables_mut<V>(v: &mut V, node: &mut ArrayOfTables)
+where
+    V: VisitMut + ?Sized,
+{
+    for table in node.iter_mut() {
+        v.visit_table_mut(table);
+    }
+}
+
+pub fn visit_value_mut<V>(v: &mut V, node: &mut Value)
+where
+    V: VisitMut + ?Sized,
+{
+    match node {
+        Value::String(s) => v.visit_string_mut(s),
+        Value::Integer(i) => v.visit_integer_mut(i),
+        Value::Float(f) => v.visit_float_mut(f),
+        Value::Boolean(b) => v.visit_boolean_mut(b),
+        Value::Datetime(dt) => v.visit_datetime_mut(dt),
+        Value::Array(array) => v.visit_array_mut(array),
+        Value::InlineTable(table) => v.visit_inline_table_mut(table),
+    }
+}
+
+macro_rules! empty_visit_mut {
+    ($name: ident, $t: ty) => {
+        fn $name<V>(_v: &mut V, _node: &mut $t)
+        where
+            V: VisitMut + ?Sized,
+        {
+        }
+    };
+}
+
+empty_visit_mut!(visit_boolean_mut, Formatted<bool>);
+empty_visit_mut!(visit_datetime_mut, Formatted<Datetime>);
+empty_visit_mut!(visit_float_mut, Formatted<f64>);
+empty_visit_mut!(visit_integer_mut, Formatted<i64>);
+empty_visit_mut!(visit_string_mut, Formatted<String>);