Struct serde_wasm_bindgen::Deserializer

pub struct Deserializer { /* fields omitted */ }

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

Trait Implementations

impl From<JsValue> for Deserializer

fn from(value: JsValue) -> Self

Performs the conversion.

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

type Error = Error

The error type that can be returned if some error occurs during deserialization.

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.

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

Hint that the Deserialize type is expecting a unit value.

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.

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

Hint that the Deserialize type is expecting a bool value.

fn deserialize_f32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a f32 value.

fn deserialize_f64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a f64 value.

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.

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.

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.

fn deserialize_i8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i8 value.

fn deserialize_i16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i16 value.

fn deserialize_i32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i32 value.

fn deserialize_i128<V: Visitor<'de>>(
    self,
    visitor: V
) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i128 value.

fn deserialize_u8<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u8 value.

fn deserialize_u16<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u16 value.

fn deserialize_u32<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u32 value.

fn deserialize_u128<V: Visitor<'de>>(
    self,
    visitor: V
) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an u128 value.

fn deserialize_i64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting an i64 value.

fn deserialize_u64<V: Visitor<'de>>(self, visitor: V) -> Result<V::Value, Error>

Hint that the Deserialize type is expecting a u64 value.

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.

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

Hint that the Deserialize type is expecting an optional value.

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

Simply calls visit_newtype_struct.

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

Supported inputs:

• JS iterable (an object with [Symbol.iterator]). Supported outputs:
• Any Rust sequence from Serde point of view (Vec, HashSet, etc.)

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

Forwards to Self::deserialize_seq.

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

Forwards to Self::deserialize_tuple.

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)].

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

Supports same input/output types as Self::deserialize_map.

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... }.

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.

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.

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 - copied to a newly created Vec<u8> on the Rust side.

fn is_human_readable(&self) -> bool

Determine whether Deserialize implementations should expect to deserialize their human-readable form.

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

type Error = Error

The error type that can be returned if some error occurs during deserialization. Must match the error type of our EnumAccess.

fn unit_variant(self) -> Result<(), Error>

Called when deserializing a variant with no values.

fn newtype_variant_seed<T: DeserializeSeed<'de>>(
    self,
    seed: T
) -> Result<T::Value, Error>

Called when deserializing a variant with a single value.

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

Called when deserializing a tuple-like variant.

fn struct_variant<V: Visitor<'de>>(
    self,
    fields: &'static [&'static str],
    visitor: V
) -> Result<V::Value, Error>

Called when deserializing a struct-like variant.

fn newtype_variant<T>(self) -> Result<T, Self::Error> where
    T: Deserialize<'de>, 

Called when deserializing a variant with a single value.