Struct serde::de::value::MapDeserializer

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pub struct MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair,
{ iter: Fuse<I>, value: Option<<I::Item as Pair>::Second>, count: usize, lifetime: PhantomData<&'de ()>, error: PhantomData<E>, }
Expand description

A deserializer that iterates over a map.

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§iter: Fuse<I>§value: Option<<I::Item as Pair>::Second>§count: usize§lifetime: PhantomData<&'de ()>§error: PhantomData<E>

Implementations§

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impl<'de, I, E> MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair,

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pub fn new(iter: I) -> Self

Construct a new MapDeserializer<I, E>.

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impl<'de, I, E> MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair, E: Error,

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

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

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impl<'de, I, E> MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair,

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fn next_pair( &mut self ) -> Option<(<I::Item as Pair>::First, <I::Item as Pair>::Second)>

Trait Implementations§

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impl<'de, I, E> Clone for MapDeserializer<'de, I, E>
where I: Iterator + Clone, I::Item: Pair, <I::Item as Pair>::Second: Clone,

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fn clone(&self) -> Self

Returns a copy of the value. Read more
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fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source. Read more
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impl<'de, I, E> Debug for MapDeserializer<'de, I, E>
where I: Iterator + Debug, I::Item: Pair, <I::Item as Pair>::Second: Debug,

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fn fmt(&self, formatter: &mut Formatter<'_>) -> Result

Formats the value using the given formatter. Read more
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impl<'de, I, E> Deserializer<'de> for MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair, <I::Item as Pair>::First: IntoDeserializer<'de, E>, <I::Item as Pair>::Second: IntoDeserializer<'de, E>, E: Error,

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type Error = E

The error type that can be returned if some error occurs during deserialization.
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fn deserialize_any<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>,

Require the Deserializer to figure out how to drive the visitor based on what data type is in the input. Read more
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fn deserialize_seq<V>(self, visitor: V) -> Result<V::Value, Self::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a sequence of values.
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fn deserialize_tuple<V>( self, len: usize, visitor: V ) -> Result<V::Value, Self::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a sequence of values and knows how many values there are without looking at the serialized data.
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fn deserialize_bool<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a bool value.
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fn deserialize_i8<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i8 value.
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fn deserialize_i16<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i16 value.
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fn deserialize_i32<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i32 value.
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fn deserialize_i64<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i64 value.
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fn deserialize_i128<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an i128 value. Read more
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fn deserialize_u8<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u8 value.
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fn deserialize_u16<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u16 value.
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fn deserialize_u32<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u32 value.
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fn deserialize_u64<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a u64 value.
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fn deserialize_u128<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an u128 value. Read more
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fn deserialize_f32<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a f32 value.
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fn deserialize_f64<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a f64 value.
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fn deserialize_char<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a char value.
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fn deserialize_str<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a string value and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_string<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a string value and would benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_bytes<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a byte array and does not benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_byte_buf<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a byte array and would benefit from taking ownership of buffered data owned by the Deserializer. Read more
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fn deserialize_option<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an optional value. Read more
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fn deserialize_unit<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a unit value.
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fn deserialize_unit_struct<V>( self, name: &'static str, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a unit struct with a particular name.
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fn deserialize_newtype_struct<V>( self, name: &'static str, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a newtype struct with a particular name.
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fn deserialize_tuple_struct<V>( self, name: &'static str, len: usize, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a tuple struct with a particular name and number of fields.
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fn deserialize_map<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a map of key-value pairs.
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fn deserialize_struct<V>( self, name: &'static str, fields: &'static [&'static str], visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting a struct with a particular name and fields.
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fn deserialize_enum<V>( self, name: &'static str, variants: &'static [&'static str], visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting an enum value with a particular name and possible variants.
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fn deserialize_identifier<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type is expecting the name of a struct field or the discriminant of an enum variant.
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fn deserialize_ignored_any<V>( self, visitor: V ) -> Result<V::Value, <Self as Deserializer<'de>>::Error>
where V: Visitor<'de>,

Hint that the Deserialize type needs to deserialize a value whose type doesn’t matter because it is ignored. Read more
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fn is_human_readable(&self) -> bool

Determine whether Deserialize implementations should expect to deserialize their human-readable form. Read more
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impl<'de, I, E> MapAccess<'de> for MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair, <I::Item as Pair>::First: IntoDeserializer<'de, E>, <I::Item as Pair>::Second: IntoDeserializer<'de, E>, E: Error,

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type Error = E

The error type that can be returned if some error occurs during deserialization.
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fn next_key_seed<T>(&mut self, seed: T) -> Result<Option<T::Value>, Self::Error>
where T: DeserializeSeed<'de>,

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries. Read more
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fn next_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error>
where T: DeserializeSeed<'de>,

This returns a Ok(value) for the next value in the map. Read more
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fn next_entry_seed<TK, TV>( &mut self, kseed: TK, vseed: TV ) -> Result<Option<(TK::Value, TV::Value)>, Self::Error>
where TK: DeserializeSeed<'de>, TV: DeserializeSeed<'de>,

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. Read more
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fn size_hint(&self) -> Option<usize>

Returns the number of entries remaining in the map, if known.
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fn next_key<K>(&mut self) -> Result<Option<K>, Self::Error>
where K: Deserialize<'de>,

This returns Ok(Some(key)) for the next key in the map, or Ok(None) if there are no more remaining entries. Read more
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fn next_value<V>(&mut self) -> Result<V, Self::Error>
where V: Deserialize<'de>,

This returns a Ok(value) for the next value in the map. Read more
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fn next_entry<K, V>(&mut self) -> Result<Option<(K, V)>, Self::Error>
where K: Deserialize<'de>, V: Deserialize<'de>,

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. Read more
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impl<'de, I, E> SeqAccess<'de> for MapDeserializer<'de, I, E>
where I: Iterator, I::Item: Pair, <I::Item as Pair>::First: IntoDeserializer<'de, E>, <I::Item as Pair>::Second: IntoDeserializer<'de, E>, E: Error,

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type Error = E

The error type that can be returned if some error occurs during deserialization.
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fn next_element_seed<T>( &mut self, seed: T ) -> Result<Option<T::Value>, Self::Error>
where T: DeserializeSeed<'de>,

This returns Ok(Some(value)) for the next value in the sequence, or Ok(None) if there are no more remaining items. Read more
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fn size_hint(&self) -> Option<usize>

Returns the number of elements remaining in the sequence, if known.
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fn next_element<T>(&mut self) -> Result<Option<T>, Self::Error>
where T: Deserialize<'de>,

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

Auto Trait Implementations§

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impl<'de, I, E> Freeze for MapDeserializer<'de, I, E>
where I: Freeze, <<I as Iterator>::Item as Pair>::Second: Freeze,

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impl<'de, I, E> RefUnwindSafe for MapDeserializer<'de, I, E>

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impl<'de, I, E> Send for MapDeserializer<'de, I, E>
where E: Send, I: Send, <<I as Iterator>::Item as Pair>::Second: Send,

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impl<'de, I, E> Sync for MapDeserializer<'de, I, E>
where E: Sync, I: Sync, <<I as Iterator>::Item as Pair>::Second: Sync,

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impl<'de, I, E> Unpin for MapDeserializer<'de, I, E>
where E: Unpin, I: Unpin, <<I as Iterator>::Item as Pair>::Second: Unpin,

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impl<'de, I, E> UnwindSafe for MapDeserializer<'de, I, E>
where E: UnwindSafe, I: UnwindSafe, <<I as Iterator>::Item as Pair>::Second: UnwindSafe,

Blanket Implementations§

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impl<T> Any for T
where T: 'static + ?Sized,

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fn type_id(&self) -> TypeId

Gets the TypeId of self. Read more
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impl<T> Borrow<T> for T
where T: ?Sized,

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fn borrow(&self) -> &T

Immutably borrows from an owned value. Read more
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impl<T> BorrowMut<T> for T
where T: ?Sized,

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fn borrow_mut(&mut self) -> &mut T

Mutably borrows from an owned value. Read more
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impl<T> From<T> for T

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fn from(t: T) -> T

Returns the argument unchanged.

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impl<T, U> Into<U> for T
where U: From<T>,

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fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of From<T> for U chooses to do.

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impl<T> ToOwned for T
where T: Clone,

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type Owned = T

The resulting type after obtaining ownership.
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fn to_owned(&self) -> T

Creates owned data from borrowed data, usually by cloning. Read more
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fn clone_into(&self, target: &mut T)

Uses borrowed data to replace owned data, usually by cloning. Read more
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impl<T, U> TryFrom<U> for T
where U: Into<T>,

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type Error = Infallible

The type returned in the event of a conversion error.
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fn try_from(value: U) -> Result<T, <T as TryFrom<U>>::Error>

Performs the conversion.
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impl<T, U> TryInto<U> for T
where U: TryFrom<T>,

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type Error = <U as TryFrom<T>>::Error

The type returned in the event of a conversion error.
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fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>

Performs the conversion.