Struct MapDeserializer

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

A helper deserializer that deserializes a map.

Implementations

impl<I, E> MapDeserializer<I, E>

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

pub fn new(iter: I) -> MapDeserializer<I, E>

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 as Iterator>::Item: Pair, <<I as Iterator>::Item as Pair>::First: ValueDeserializer<E>, <<I as Iterator>::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_ as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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_ as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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_ as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a bool value.

fn deserialize_u8<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a u8 value.

fn deserialize_u16<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a u16 value.

fn deserialize_u32<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a u32 value.

fn deserialize_u64<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a u64 value.

fn deserialize_i8<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting an i8 value.

fn deserialize_i16<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting an i16 value.

fn deserialize_i32<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting an i32 value.

fn deserialize_i64<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting an i64 value.

fn deserialize_f32<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a f32 value.

fn deserialize_f64<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a f64 value.

fn deserialize_char<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a char value.

fn deserialize_str<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting a unit value.

fn deserialize_option<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::Error>

where __V: Visitor,

Hint that the Deserialize type is expecting an optional value.

fn deserialize_bytes<__V>( self, visitor: __V, ) -> Result<<__V as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Visitor>::Value, <MapDeserializer<I, E> as Deserializer>::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 as Iterator>::Item: Pair, <<I as Iterator>::Item as Pair>::First: ValueDeserializer<E>, <<I as Iterator>::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 as DeserializeSeed>::Value>, <MapDeserializer<I, E> as MapVisitor>::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 as DeserializeSeed>::Value, <MapDeserializer<I, E> as MapVisitor>::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 as DeserializeSeed>::Value, <TV as DeserializeSeed>::Value)>, <MapDeserializer<I, E> as MapVisitor>::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 as Iterator>::Item: Pair, <<I as Iterator>::Item as Pair>::First: ValueDeserializer<E>, <<I as Iterator>::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 as DeserializeSeed>::Value>, <MapDeserializer<I, E> as SeqVisitor>::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.