Struct serde::de::value::MapDeserializer

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

A helper deserializer that deserializes a map.

Methods

impl<I, K, V> MapDeserializer<I, K, V> where I: Iterator<Item = (K, V)>,
        K: ValueDeserializer,
        V: ValueDeserializer

fn new(iter: I, len: usize) -> Self

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

Trait Implementations

impl<I, K, V> Deserializer for MapDeserializer<I, K, V> where I: Iterator<Item = (K, V)>,
        K: ValueDeserializer,
        V: ValueDeserializer

type Error = Error

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

fn visit<V_>(&mut self, visitor: V_) -> Result<V_::Value, Error> where V_: Visitor

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

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

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

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

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

fn visit_u8<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_u16<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_u32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_u64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

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

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

fn visit_i8<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_i16<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_i32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_i64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_f32<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn visit_f64<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

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

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

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

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

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

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

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

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

fn visit_option<V>(&mut self, visitor: V) -> Result<V::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 visit_seq<V>(&mut self, visitor: V) -> Result<V::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 visit_map<V>(&mut self, visitor: V) -> Result<V::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 visit_unit_struct<V>(&mut self,
                        _name: &'static str,
                        visitor: V)
                        -> Result<V::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 visit_newtype_struct<V>(&mut self,
                           name: &'static str,
                           visitor: V)
                           -> Result<V::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 visit_tuple_struct<V>(&mut self,
                         _name: &'static str,
                         len: usize,
                         visitor: V)
                         -> Result<V::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 visit_struct<V>(&mut self,
                   _name: &'static str,
                   _fields: &'static [&'static str],
                   visitor: V)
                   -> Result<V::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 visit_tuple<V>(&mut self,
                  _len: usize,
                  visitor: V)
                  -> Result<V::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 visit_enum<V>(&mut self,
                 _enum: &'static str,
                 _variants: &'static [&'static str],
                 _visitor: V)
                 -> Result<V::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 visit_bytes<V>(&mut self, visitor: V) -> Result<V::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 visit_struct_field<V>(&mut self, visitor: V) -> Result<V::Value, Self::Error> where V: Visitor

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

fn format() -> &'static str

Specify a format string for the deserializer.

impl<I, K, V> MapVisitor for MapDeserializer<I, K, V> where I: Iterator<Item = (K, V)>,
        K: ValueDeserializer,
        V: ValueDeserializer

type Error = Error

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

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

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

fn end(&mut self) -> Result<(), 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 there