Struct serde::de::value::MapDeserializer

[+] Show declaration

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

[−] Expand description

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,

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

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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,

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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

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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,

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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,

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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,

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

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

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

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

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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,

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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,

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Report that there