Struct MapDeserializer 

pub struct MapDeserializer<I, K, V, E>
where
    I: Iterator<Item = (K, V)>,
    K: ValueDeserializer<E>,
    V: ValueDeserializer<E>,
    E: Error,
{ /* private fields */ }

A helper deserializer that deserializes a map.

Implementations

impl<I, K, V, E> MapDeserializer<I, K, V, E>

where I: Iterator<Item = (K, V)>, K: ValueDeserializer<E>, V: ValueDeserializer<E>, E: Error,

pub fn new(iter: I, len: usize) -> MapDeserializer<I, K, V, E>

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

Trait Implementations

impl<I, K, V, E> Deserializer for MapDeserializer<I, K, V, E>

where I: Iterator<Item = (K, V)>, K: ValueDeserializer<E>, V: ValueDeserializer<E>, E: Error,

type Error = E

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

fn deserialize<V_>( &mut self, visitor: V_, ) -> Result<<V_ as Visitor>::Value, <MapDeserializer<I, K, V, E> as Deserializer>::Error>

where V_: Visitor,

This method walks a visitor through a value as it is being deserialized.

fn deserialize_bool<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a bool value.

fn deserialize_usize<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an usize value.

fn deserialize_u8<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an u8 value.

fn deserialize_u16<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an u16 value.

fn deserialize_u32<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an u32 value.

fn deserialize_u64<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an u64 value.

fn deserialize_isize<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an isize value.

fn deserialize_i8<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an i8 value.

fn deserialize_i16<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an i16 value.

fn deserialize_i32<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an i32 value.

fn deserialize_i64<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an i64 value.

fn deserialize_f32<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a f32 value.

fn deserialize_f64<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a f64 value.

fn deserialize_char<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a char value.

fn deserialize_str<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a &str value.

fn deserialize_string<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a String value.

fn deserialize_unit<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an unit value.

fn deserialize_option<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting an Option value. This allows deserializers that encode an optional value as a nullable value to convert the null value into a None, and a regular value as Some(value).

fn deserialize_seq<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a sequence value. This allows deserializers to parse sequences that aren’t tagged as sequences.

fn deserialize_fixed_size_array<V>( &mut self, _len: usize, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a fixed size array. This allows deserializers to parse arrays that aren’t tagged as arrays.

fn deserialize_bytes<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a Vec<u8>. This allows deserializers that provide a custom byte vector serialization to properly deserialize the type.

fn deserialize_map<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a map of values. This allows deserializers to parse sequences that aren’t tagged as maps.

fn deserialize_unit_struct<V>( &mut self, _name: &'static str, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a unit struct. This allows deserializers to a unit struct that aren’t tagged as a unit struct.

fn deserialize_newtype_struct<V>( &mut self, name: &'static str, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a newtype struct. This allows deserializers to a newtype struct that aren’t tagged as a newtype struct.

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

where V: Visitor,

This method hints that the Deserialize type is expecting a tuple struct. This allows deserializers to parse sequences that aren’t tagged as sequences.

fn deserialize_struct<V>( &mut self, _name: &'static str, _fields: &'static [&'static str], visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a struct. This allows deserializers to parse sequences that aren’t tagged as maps.

fn deserialize_struct_field<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting some sort of struct field name. This allows deserializers to choose between &str, usize, or &u8 to properly deserialize a struct field.

fn deserialize_tuple<V>( &mut self, _len: usize, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type is expecting a tuple value. This allows deserializers that provide a custom tuple serialization to properly deserialize the type.

fn deserialize_enum<V>( &mut self, _enum: &'static str, _variants: &'static [&'static str], _visitor: V, ) -> Result<<V as EnumVisitor>::Value, Self::Error>

where V: EnumVisitor,

This method hints that the Deserialize type is expecting an enum value. This allows deserializers that provide a custom enumeration serialization to properly deserialize the type.

fn deserialize_ignored_any<V>( &mut self, visitor: V, ) -> Result<<V as Visitor>::Value, Self::Error>

where V: Visitor,

This method hints that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored.

impl<I, K, V, E> MapVisitor for MapDeserializer<I, K, V, E>

where I: Iterator<Item = (K, V)>, K: ValueDeserializer<E>, V: ValueDeserializer<E>, E: Error,

type Error = E

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

fn visit_key<T>( &mut self, ) -> Result<Option<T>, <MapDeserializer<I, K, V, E> as MapVisitor>::Error>

where T: Deserialize,

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

fn visit_value<T>( &mut self, ) -> Result<T, <MapDeserializer<I, K, V, E> as MapVisitor>::Error>

where T: Deserialize,

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

fn end( &mut self, ) -> Result<(), <MapDeserializer<I, K, V, E> as MapVisitor>::Error>

This signals to the MapVisitor that the Visitor does not expect any more items.

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

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

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

where K: Deserialize, V: Deserialize,

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

fn missing_field<V>(&mut self, field: &'static str) -> Result<V, Self::Error>

where V: Deserialize,

Report that the struct has a field that wasn’t deserialized