Vendor things
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third-party/vendor/serde/src/lib.rs
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third-party/vendor/serde/src/lib.rs
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//! # Serde
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//!
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//! Serde is a framework for ***ser***ializing and ***de***serializing Rust data
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//! structures efficiently and generically.
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//!
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//! The Serde ecosystem consists of data structures that know how to serialize
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//! and deserialize themselves along with data formats that know how to
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//! serialize and deserialize other things. Serde provides the layer by which
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//! these two groups interact with each other, allowing any supported data
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//! structure to be serialized and deserialized using any supported data format.
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//!
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//! See the Serde website <https://serde.rs/> for additional documentation and
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//! usage examples.
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//!
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//! ## Design
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//!
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//! Where many other languages rely on runtime reflection for serializing data,
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//! Serde is instead built on Rust's powerful trait system. A data structure
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//! that knows how to serialize and deserialize itself is one that implements
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//! Serde's `Serialize` and `Deserialize` traits (or uses Serde's derive
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//! attribute to automatically generate implementations at compile time). This
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//! avoids any overhead of reflection or runtime type information. In fact in
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//! many situations the interaction between data structure and data format can
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//! be completely optimized away by the Rust compiler, leaving Serde
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//! serialization to perform the same speed as a handwritten serializer for the
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//! specific selection of data structure and data format.
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//!
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//! ## Data formats
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//!
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//! The following is a partial list of data formats that have been implemented
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//! for Serde by the community.
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//!
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//! - [JSON], the ubiquitous JavaScript Object Notation used by many HTTP APIs.
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//! - [Postcard], a no\_std and embedded-systems friendly compact binary format.
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//! - [CBOR], a Concise Binary Object Representation designed for small message
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//! size without the need for version negotiation.
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//! - [YAML], a self-proclaimed human-friendly configuration language that ain't
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//! markup language.
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//! - [MessagePack], an efficient binary format that resembles a compact JSON.
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//! - [TOML], a minimal configuration format used by [Cargo].
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//! - [Pickle], a format common in the Python world.
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//! - [RON], a Rusty Object Notation.
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//! - [BSON], the data storage and network transfer format used by MongoDB.
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//! - [Avro], a binary format used within Apache Hadoop, with support for schema
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//! definition.
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//! - [JSON5], a superset of JSON including some productions from ES5.
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//! - [URL] query strings, in the x-www-form-urlencoded format.
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//! - [Starlark], the format used for describing build targets by the Bazel and
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//! Buck build systems. *(serialization only)*
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//! - [Envy], a way to deserialize environment variables into Rust structs.
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//! *(deserialization only)*
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//! - [Envy Store], a way to deserialize [AWS Parameter Store] parameters into
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//! Rust structs. *(deserialization only)*
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//! - [S-expressions], the textual representation of code and data used by the
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//! Lisp language family.
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//! - [D-Bus]'s binary wire format.
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//! - [FlexBuffers], the schemaless cousin of Google's FlatBuffers zero-copy
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//! serialization format.
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//! - [Bencode], a simple binary format used in the BitTorrent protocol.
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//! - [Token streams], for processing Rust procedural macro input.
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//! *(deserialization only)*
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//! - [DynamoDB Items], the format used by [rusoto_dynamodb] to transfer data to
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//! and from DynamoDB.
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//! - [Hjson], a syntax extension to JSON designed around human reading and
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//! editing. *(deserialization only)*
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//! - [CSV], Comma-separated values is a tabular text file format.
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//!
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//! [JSON]: https://github.com/serde-rs/json
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//! [Postcard]: https://github.com/jamesmunns/postcard
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//! [CBOR]: https://github.com/enarx/ciborium
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//! [YAML]: https://github.com/dtolnay/serde-yaml
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//! [MessagePack]: https://github.com/3Hren/msgpack-rust
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//! [TOML]: https://docs.rs/toml
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//! [Pickle]: https://github.com/birkenfeld/serde-pickle
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//! [RON]: https://github.com/ron-rs/ron
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//! [BSON]: https://github.com/mongodb/bson-rust
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//! [Avro]: https://docs.rs/apache-avro
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//! [JSON5]: https://github.com/callum-oakley/json5-rs
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//! [URL]: https://docs.rs/serde_qs
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//! [Starlark]: https://github.com/dtolnay/serde-starlark
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//! [Envy]: https://github.com/softprops/envy
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//! [Envy Store]: https://github.com/softprops/envy-store
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//! [Cargo]: https://doc.rust-lang.org/cargo/reference/manifest.html
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//! [AWS Parameter Store]: https://docs.aws.amazon.com/systems-manager/latest/userguide/systems-manager-parameter-store.html
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//! [S-expressions]: https://github.com/rotty/lexpr-rs
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//! [D-Bus]: https://docs.rs/zvariant
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//! [FlexBuffers]: https://github.com/google/flatbuffers/tree/master/rust/flexbuffers
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//! [Bencode]: https://github.com/P3KI/bendy
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//! [Token streams]: https://github.com/oxidecomputer/serde_tokenstream
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//! [DynamoDB Items]: https://docs.rs/serde_dynamo
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//! [rusoto_dynamodb]: https://docs.rs/rusoto_dynamodb
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//! [Hjson]: https://github.com/Canop/deser-hjson
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//! [CSV]: https://docs.rs/csv
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////////////////////////////////////////////////////////////////////////////////
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// Serde types in rustdoc of other crates get linked to here.
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#![doc(html_root_url = "https://docs.rs/serde/1.0.197")]
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// Support using Serde without the standard library!
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#![cfg_attr(not(feature = "std"), no_std)]
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// Show which crate feature enables conditionally compiled APIs in documentation.
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#![cfg_attr(doc_cfg, feature(doc_cfg))]
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// Unstable functionality only if the user asks for it. For tracking and
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// discussion of these features please refer to this issue:
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//
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// https://github.com/serde-rs/serde/issues/812
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#![cfg_attr(feature = "unstable", feature(error_in_core, never_type))]
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#![allow(unknown_lints, bare_trait_objects, deprecated)]
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// Ignored clippy and clippy_pedantic lints
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#![allow(
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// clippy bug: https://github.com/rust-lang/rust-clippy/issues/5704
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clippy::unnested_or_patterns,
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// clippy bug: https://github.com/rust-lang/rust-clippy/issues/7768
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clippy::semicolon_if_nothing_returned,
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// not available in our oldest supported compiler
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clippy::empty_enum,
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clippy::type_repetition_in_bounds, // https://github.com/rust-lang/rust-clippy/issues/8772
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// integer and float ser/de requires these sorts of casts
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clippy::cast_possible_truncation,
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clippy::cast_possible_wrap,
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clippy::cast_sign_loss,
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// things are often more readable this way
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clippy::cast_lossless,
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clippy::module_name_repetitions,
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clippy::single_match_else,
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clippy::type_complexity,
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clippy::use_self,
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clippy::zero_prefixed_literal,
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// correctly used
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clippy::derive_partial_eq_without_eq,
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clippy::enum_glob_use,
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clippy::explicit_auto_deref,
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clippy::incompatible_msrv,
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clippy::let_underscore_untyped,
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clippy::map_err_ignore,
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clippy::new_without_default,
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clippy::result_unit_err,
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clippy::wildcard_imports,
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// not practical
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clippy::needless_pass_by_value,
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clippy::similar_names,
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clippy::too_many_lines,
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// preference
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clippy::doc_markdown,
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clippy::unseparated_literal_suffix,
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// false positive
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clippy::needless_doctest_main,
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// noisy
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clippy::missing_errors_doc,
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clippy::must_use_candidate,
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)]
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// Restrictions
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#![deny(clippy::question_mark_used)]
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// Rustc lints.
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#![deny(missing_docs, unused_imports)]
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////////////////////////////////////////////////////////////////////////////////
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#[cfg(feature = "alloc")]
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extern crate alloc;
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/// A facade around all the types we need from the `std`, `core`, and `alloc`
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/// crates. This avoids elaborate import wrangling having to happen in every
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/// module.
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mod lib {
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mod core {
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#[cfg(not(feature = "std"))]
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pub use core::*;
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#[cfg(feature = "std")]
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pub use std::*;
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}
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pub use self::core::{f32, f64};
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pub use self::core::{i16, i32, i64, i8, isize};
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pub use self::core::{iter, num, ptr, str};
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pub use self::core::{u16, u32, u64, u8, usize};
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#[cfg(any(feature = "std", feature = "alloc"))]
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pub use self::core::{cmp, mem, slice};
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pub use self::core::cell::{Cell, RefCell};
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pub use self::core::clone;
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pub use self::core::cmp::Reverse;
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pub use self::core::convert;
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pub use self::core::default;
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pub use self::core::fmt::{self, Debug, Display, Write as FmtWrite};
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pub use self::core::marker::{self, PhantomData};
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pub use self::core::num::Wrapping;
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pub use self::core::ops::{Bound, Range, RangeFrom, RangeInclusive, RangeTo};
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pub use self::core::option;
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pub use self::core::result;
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pub use self::core::time::Duration;
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#[cfg(all(feature = "alloc", not(feature = "std")))]
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pub use alloc::borrow::{Cow, ToOwned};
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#[cfg(feature = "std")]
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pub use std::borrow::{Cow, ToOwned};
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#[cfg(all(feature = "alloc", not(feature = "std")))]
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pub use alloc::string::{String, ToString};
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#[cfg(feature = "std")]
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pub use std::string::{String, ToString};
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#[cfg(all(feature = "alloc", not(feature = "std")))]
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pub use alloc::vec::Vec;
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#[cfg(feature = "std")]
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pub use std::vec::Vec;
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#[cfg(all(feature = "alloc", not(feature = "std")))]
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pub use alloc::boxed::Box;
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#[cfg(feature = "std")]
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pub use std::boxed::Box;
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#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
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pub use alloc::rc::{Rc, Weak as RcWeak};
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#[cfg(all(feature = "rc", feature = "std"))]
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pub use std::rc::{Rc, Weak as RcWeak};
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#[cfg(all(feature = "rc", feature = "alloc", not(feature = "std")))]
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pub use alloc::sync::{Arc, Weak as ArcWeak};
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#[cfg(all(feature = "rc", feature = "std"))]
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pub use std::sync::{Arc, Weak as ArcWeak};
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#[cfg(all(feature = "alloc", not(feature = "std")))]
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pub use alloc::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
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#[cfg(feature = "std")]
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pub use std::collections::{BTreeMap, BTreeSet, BinaryHeap, LinkedList, VecDeque};
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#[cfg(all(not(no_core_cstr), not(feature = "std")))]
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pub use self::core::ffi::CStr;
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#[cfg(feature = "std")]
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pub use std::ffi::CStr;
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#[cfg(all(not(no_core_cstr), feature = "alloc", not(feature = "std")))]
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pub use alloc::ffi::CString;
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#[cfg(feature = "std")]
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pub use std::ffi::CString;
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#[cfg(feature = "std")]
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pub use std::{error, net};
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#[cfg(feature = "std")]
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pub use std::collections::{HashMap, HashSet};
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#[cfg(feature = "std")]
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pub use std::ffi::{OsStr, OsString};
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#[cfg(feature = "std")]
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pub use std::hash::{BuildHasher, Hash};
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#[cfg(feature = "std")]
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pub use std::io::Write;
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#[cfg(feature = "std")]
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pub use std::path::{Path, PathBuf};
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#[cfg(feature = "std")]
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pub use std::sync::{Mutex, RwLock};
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#[cfg(feature = "std")]
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pub use std::time::{SystemTime, UNIX_EPOCH};
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#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic)))]
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pub use std::sync::atomic::{
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AtomicBool, AtomicI16, AtomicI32, AtomicI8, AtomicIsize, AtomicU16, AtomicU32, AtomicU8,
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AtomicUsize, Ordering,
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};
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#[cfg(all(feature = "std", no_target_has_atomic, not(no_std_atomic64)))]
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pub use std::sync::atomic::{AtomicI64, AtomicU64};
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#[cfg(all(feature = "std", not(no_target_has_atomic)))]
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pub use std::sync::atomic::Ordering;
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#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "8"))]
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pub use std::sync::atomic::{AtomicBool, AtomicI8, AtomicU8};
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#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "16"))]
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pub use std::sync::atomic::{AtomicI16, AtomicU16};
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#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "32"))]
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pub use std::sync::atomic::{AtomicI32, AtomicU32};
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#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "64"))]
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pub use std::sync::atomic::{AtomicI64, AtomicU64};
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#[cfg(all(feature = "std", not(no_target_has_atomic), target_has_atomic = "ptr"))]
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pub use std::sync::atomic::{AtomicIsize, AtomicUsize};
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}
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// None of this crate's error handling needs the `From::from` error conversion
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// performed implicitly by the `?` operator or the standard library's `try!`
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// macro. This simplified macro gives a 5.5% improvement in compile time
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// compared to standard `try!`, and 9% improvement compared to `?`.
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macro_rules! tri {
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($expr:expr) => {
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match $expr {
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Ok(val) => val,
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Err(err) => return Err(err),
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}
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};
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}
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////////////////////////////////////////////////////////////////////////////////
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#[macro_use]
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mod macros;
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#[macro_use]
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mod integer128;
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pub mod de;
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pub mod ser;
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#[doc(inline)]
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pub use crate::de::{Deserialize, Deserializer};
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#[doc(inline)]
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pub use crate::ser::{Serialize, Serializer};
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// Used by generated code and doc tests. Not public API.
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#[doc(hidden)]
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#[path = "private/mod.rs"]
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pub mod __private;
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#[path = "de/seed.rs"]
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mod seed;
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#[cfg(not(any(feature = "std", feature = "unstable")))]
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mod std_error;
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// Re-export #[derive(Serialize, Deserialize)].
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//
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// The reason re-exporting is not enabled by default is that disabling it would
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// be annoying for crates that provide handwritten impls or data formats. They
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// would need to disable default features and then explicitly re-enable std.
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#[cfg(feature = "serde_derive")]
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extern crate serde_derive;
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/// Derive macro available if serde is built with `features = ["derive"]`.
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#[cfg(feature = "serde_derive")]
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#[cfg_attr(doc_cfg, doc(cfg(feature = "derive")))]
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pub use serde_derive::{Deserialize, Serialize};
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#[cfg(all(not(no_serde_derive), any(feature = "std", feature = "alloc")))]
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mod actually_private {
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pub struct T;
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}
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