[oden] Grab my incomplete QuickJS wrapper

oden-js/src/conversion/from.rs

@@ -0,0 +1,107 @@
+use crate::{ContextRef, Error, Result, ValueRef};
+use std::num::TryFromIntError;
+
+pub trait TryFromValue: Sized {
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self>;
+}
+
+impl TryFromValue for u8 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        let v = value.to_u32(&ctx)?;
+        v.try_into()
+            .map_err(|e: TryFromIntError| Error::ConversionError(e.to_string()))
+    }
+}
+
+impl TryFromValue for u16 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        let v = value.to_u32(&ctx)?;
+        v.try_into()
+            .map_err(|e: TryFromIntError| Error::ConversionError(e.to_string()))
+    }
+}
+
+impl TryFromValue for u32 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_u32(&ctx)
+    }
+}
+
+// impl<'c,'d> TryFrom<&'c ValueRef<'d>> for u64 {
+//     #[inline]
+//     fn try_from_value<'r>(value: &ValueRef<'r>, ctx:&ContextRef<'r>) -> Result<'r, Self> {
+//         value.to_u64()
+//     }
+// }
+
+impl TryFromValue for i8 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        let v = value.to_i32(&ctx)?;
+        v.try_into()
+            .map_err(|e: TryFromIntError| Error::ConversionError(e.to_string()))
+    }
+}
+
+impl TryFromValue for i16 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        let v = value.to_i32(&ctx)?;
+        v.try_into()
+            .map_err(|e: TryFromIntError| Error::ConversionError(e.to_string()))
+    }
+}
+
+impl TryFromValue for i32 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_i32(&ctx)
+    }
+}
+
+impl TryFromValue for i64 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_i64(&ctx)
+    }
+}
+
+impl TryFromValue for f32 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        let v = value.to_float64(&ctx)?;
+        Ok(v as f32)
+    }
+}
+
+impl TryFromValue for f64 {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_float64(&ctx)
+    }
+}
+
+impl TryFromValue for bool {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, _ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_bool()
+    }
+}
+
+impl TryFromValue for String {
+    #[inline]
+    fn try_from_value<'r>(value: &ValueRef<'r>, ctx: &ContextRef<'r>) -> Result<'r, Self> {
+        value.to_string(&ctx)
+    }
+}
+
+// impl<'c, T: Class> TryFrom<&'c ValueRef<'_>> for T {
+//
+//     #[inline]
+//     fn try_from_value<'r>(value: &ValueRef<'r>, ctx:&ContextRef<'r>) -> Result<'r, Self> {
+//         T::from_value(value)
+//     }
+// }