pub struct Deserializer { /* private fields */ }
Expand description

A newtype that allows using any JsValue as a serde::Deserializer.

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impl<'de> Deserializer<'de> for Deserializer

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fn deserialize_char<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Converts a JavaScript string to a Rust char.

By default we don’t perform detection of single chars because it’s pretty complicated, but if we get a hint that they’re expected, this methods allows to avoid heap allocations of an intermediate String by directly converting numeric codepoints instead.

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fn deserialize_newtype_struct<V: Visitor<'de>>( self, _name: &'static str, visitor: V ) -> Result<V::Value, Error>

Simply calls visit_newtype_struct.

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fn deserialize_seq<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Supported inputs:

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fn deserialize_tuple<V: Visitor<'de>>( self, _len: usize, visitor: V ) -> Result<V::Value, Error>

Forwards to Self::deserialize_seq.

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fn deserialize_tuple_struct<V: Visitor<'de>>( self, _name: &'static str, len: usize, visitor: V ) -> Result<V::Value, Error>

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fn deserialize_map<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Supported inputs:

  • A JS iterable that is expected to return [key, value] pairs.
  • A JS object, which will be iterated using Object.entries. Supported outputs:
  • A Rust key-value map (HashMap, BTreeMap, etc.).
  • A typed Rust structure with #[derive(Deserialize)].
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fn deserialize_struct<V: Visitor<'de>>( self, _name: &'static str, fields: &'static [&'static str], visitor: V ) -> Result<V::Value, Error>

Supported inputs:

  • A plain JS object. Supported outputs:
  • A typed Rust structure with #[derive(Deserialize)].
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fn deserialize_enum<V: Visitor<'de>>( self, _name: &'static str, _variants: &'static [&'static str], visitor: V ) -> Result<V::Value, Error>

Here we try to be compatible with serde-json, which means supporting:

  • "Variant" - gets converted to a unit variant MyEnum::Variant
  • { Variant: ...payload... } - gets converted to a MyEnum::Variant { ...payload... }.
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fn deserialize_ignored_any<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

Ignores any value without calling to the JS side even to check its type.

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fn deserialize_bytes<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

We can’t take references to JS memory, so forwards to an owned Self::deserialize_byte_buf.

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fn deserialize_byte_buf<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

Serde expects visit_byte_buf to be called only in response to an explicit deserialize_bytes, so we provide conversions here.

Supported inputs:

  • ArrayBuffer - converted to an Uint8Array view first.
  • Uint8Array, Array - copied to a newly created Vec<u8> on the Rust side.
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type Error = Error

The error type that can be returned if some error occurs during deserialization.
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fn deserialize_any<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more
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fn deserialize_unit<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a unit value.
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fn deserialize_unit_struct<V: Visitor<'de>>( self, _name: &'static str, visitor: V ) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a unit struct with a particular name.
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fn deserialize_bool<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a bool value.
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fn deserialize_f32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a f32 value.
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fn deserialize_f64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a f64 value.
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fn deserialize_identifier<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.
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fn deserialize_str<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_string<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_i8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i8 value.
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fn deserialize_i16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i16 value.
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fn deserialize_i32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i32 value.
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fn deserialize_u8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u8 value.
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fn deserialize_u16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u16 value.
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fn deserialize_u32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u32 value.
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fn deserialize_i64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i64 value.
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fn deserialize_u64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u64 value.
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fn deserialize_i128<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i128 value. Read more
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fn deserialize_u128<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an u128 value. Read more
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fn deserialize_option<V: Visitor<'de>>( self, visitor: V ) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an optional value. Read more
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fn is_human_readable(&self) -> bool

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more
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impl From<JsValue> for Deserializer

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fn from(value: JsValue) -> Self

Converts to this type from the input type.
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impl<'de> IntoDeserializer<'de, Error> for Deserializer

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type Deserializer = Deserializer

The type of the deserializer being converted into.
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fn into_deserializer(self) -> Self::Deserializer

Convert this value into a deserializer.
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impl<'de> VariantAccess<'de> for Deserializer

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type Error = Error

The error type that can be returned if some error occurs during deserialization. Must match the error type of our EnumAccess.
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fn unit_variant(self) -> Result<(), Error>

Called when deserializing a variant with no values. Read more
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fn newtype_variant_seed<T: DeserializeSeed<'de>>( self, seed: T ) -> Result<T::Value, Error>

Called when deserializing a variant with a single value. Read more
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fn tuple_variant<V: Visitor<'de>>( self, len: usize, visitor: V ) -> Result<V::Value, Error>

Called when deserializing a tuple-like variant. Read more
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fn struct_variant<V: Visitor<'de>>( self, fields: &'static [&'static str], visitor: V ) -> Result<V::Value, Error>

Called when deserializing a struct-like variant. Read more
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fn newtype_variant<T>(self) -> Result<T, Self::Error>where T: Deserialize<'de>,

Called when deserializing a variant with a single value. Read more

Auto Trait Implementations§

Blanket Implementations§

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impl<T> Any for Twhere T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for Twhere T: ?Sized,

const: unstable · source§

fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

const: unstable · source§

fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for Twhere U: From<T>,

const: unstable · source§

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T, U> TryFrom<U> for Twhere U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
const: unstable · source§

fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for Twhere U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
const: unstable · source§

fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.