Struct serde::de::value::MapDeserializer

pub struct MapDeserializer<I, E> where
    I: Iterator,
    I::Item: Pair,
    <I::Item as Pair>::First: ValueDeserializer<E>,
    <I::Item as Pair>::Second: ValueDeserializer<E>,
    E: Error,  { /* fields omitted */ }

A helper deserializer that deserializes a map.

Methods

impl<I, E> MapDeserializer<I, E> where
    I: Iterator,
    I::Item: Pair,
    <I::Item as Pair>::First: ValueDeserializer<E>,
    <I::Item as Pair>::Second: ValueDeserializer<E>,
    E: Error, 

pub fn new(iter: I) -> Self

Construct a new MapDeserializer<I, K, V, E>.

pub fn end(self) -> Result<(), E>

Check for remaining elements after passing a MapDeserializer to Visitor::visit_map.

Trait Implementations

impl<I, E> Deserializer for MapDeserializer<I, E> where
    I: Iterator,
    I::Item: Pair,
    <I::Item as Pair>::First: ValueDeserializer<E>,
    <I::Item as Pair>::Second: ValueDeserializer<E>,
    E: Error, 

type Error = E

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

fn deserialize<V_>(self, visitor: V_) -> Result<V_::Value, Self::Error> where
    V_: Visitor, 

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input.

fn deserialize_seq<V_>(self, visitor: V_) -> Result<V_::Value, Self::Error> where
    V_: Visitor, 

Hint that the Deserialize type is expecting a sequence of values.

fn deserialize_seq_fixed_size<V_>(
    self,
    _len: usize,
    visitor: V_
) -> Result<V_::Value, Self::Error> where
    V_: Visitor, 

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.

fn deserialize_bool<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a bool value.

fn deserialize_u8<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a u8 value.

fn deserialize_u16<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a u16 value.

fn deserialize_u32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a u32 value.

fn deserialize_u64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a u64 value.

fn deserialize_i8<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an i8 value.

fn deserialize_i16<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an i16 value.

fn deserialize_i32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an i32 value.

fn deserialize_i64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an i64 value.

fn deserialize_f32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a f32 value.

fn deserialize_f64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a f64 value.

fn deserialize_char<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a char value.

fn deserialize_str<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

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>(
    self,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

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_unit<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a unit value.

fn deserialize_option<__V>(
    self,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an optional value.

fn deserialize_bytes<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer.

fn deserialize_map<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a map of key-value pairs.

fn deserialize_unit_struct<__V>(
    self,
    _: &'static str,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a unit struct with a particular name.

fn deserialize_newtype_struct<__V>(
    self,
    _: &'static str,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a newtype struct with a particular name.

fn deserialize_tuple_struct<__V>(
    self,
    _: &'static str,
    _: usize,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.

fn deserialize_struct<__V>(
    self,
    _: &'static str,
    _: &'static [&'static str],
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a struct with a particular name and fields.

fn deserialize_struct_field<__V>(
    self,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting the name of a struct field.

fn deserialize_tuple<__V>(
    self,
    _: usize,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a tuple value with a particular number of elements.

fn deserialize_enum<__V>(
    self,
    _: &'static str,
    _: &'static [&'static str],
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.

fn deserialize_ignored_any<__V>(
    self,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type needs to deserialize a value whose type doesn't matter because it is ignored.

fn deserialize_byte_buf<__V>(
    self,
    visitor: __V
) -> Result<__V::Value, Self::Error> where
    __V: Visitor, 

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer.

impl<I, E> MapVisitor for MapDeserializer<I, E> where
    I: Iterator,
    I::Item: Pair,
    <I::Item as Pair>::First: ValueDeserializer<E>,
    <I::Item as Pair>::Second: ValueDeserializer<E>,
    E: Error, 

type Error = E

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

fn visit_key_seed<T>(
    &mut self,
    seed: T
) -> Result<Option<T::Value>, Self::Error> where
    T: DeserializeSeed, 

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn visit_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> where
    T: DeserializeSeed, 

This returns a Ok(value) for the next value in the map.

fn visit_seed<TK, TV>(
    &mut self,
    kseed: TK,
    vseed: TV
) -> Result<Option<(TK::Value, TV::Value)>, Self::Error> where
    TK: DeserializeSeed,
    TV: DeserializeSeed, 

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

fn size_hint(&self) -> (usize, Option<usize>)

Return the lower and upper bound of items remaining in the sequence.

fn visit_key<K>(&mut self) -> Result<Option<K>, Self::Error> where
    K: Deserialize, 

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries.

fn visit_value<V>(&mut self) -> Result<V, Self::Error> where
    V: Deserialize, 

This returns a Ok(value) for the next value in the map.

fn visit<K, V>(&mut self) -> Result<Option<(K, V)>, Self::Error> where
    K: Deserialize,
    V: Deserialize, 

This returns Ok(Some((key, value))) for the next (key-value) pair in the map, or Ok(None) if there are no more remaining items.

impl<I, E> SeqVisitor for MapDeserializer<I, E> where
    I: Iterator,
    I::Item: Pair,
    <I::Item as Pair>::First: ValueDeserializer<E>,
    <I::Item as Pair>::Second: ValueDeserializer<E>,
    E: Error, 

type Error = E

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

fn visit_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error> where
    T: DeserializeSeed, 

This returns Ok(Some(value)) for the next value in the sequence, or Ok(None) if there are no more remaining items.

fn size_hint(&self) -> (usize, Option<usize>)

Return the lower and upper bound of items remaining in the sequence.

fn visit<T>(&mut self) -> Result<Option<T>, Self::Error> where
    T: Deserialize, 

This returns Ok(Some(value)) for the next value in the sequence, or Ok(None) if there are no more remaining items.