Struct serde::de::value::MapDeserializer
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pub struct MapDeserializer<I, E> where I: Iterator,
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error { /* fields omitted */ }
A helper deserializer that deserializes a map.
Methods
impl<I, E> MapDeserializer<I, E> where I: Iterator,
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error
[src]
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error
fn new(iter: I) -> Self
Construct a new MapDeserializer<I, K, V, E>
.
Trait Implementations
impl<I, E> Deserializer for MapDeserializer<I, E> where I: Iterator,
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error
[src]
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::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_::Value, Self::Error> where V_: Visitor
This method walks a visitor through a value as it is being deserialized.
fn deserialize_seq<V_>(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. Read more
fn deserialize_seq_fixed_size<V_>(self,
_len: usize,
visitor: V_)
-> Result<V_::Value, Self::Error> where V_: Visitor
_len: usize,
visitor: V_)
-> Result<V_::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. Read more
fn deserialize_bool<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a bool
value.
fn deserialize_usize<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an usize
value. A reasonable default is to forward to deserialize_u64
. Read more
fn deserialize_u8<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an u8
value. A reasonable default is to forward to deserialize_u64
. Read more
fn deserialize_u16<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an u16
value. A reasonable default is to forward to deserialize_u64
. Read more
fn deserialize_u32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an u32
value. A reasonable default is to forward to deserialize_u64
. Read more
fn deserialize_u64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an u64
value.
fn deserialize_isize<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an isize
value. A reasonable default is to forward to deserialize_i64
. Read more
fn deserialize_i8<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an i8
value. A reasonable default is to forward to deserialize_i64
. Read more
fn deserialize_i16<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an i16
value. A reasonable default is to forward to deserialize_i64
. Read more
fn deserialize_i32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an i32
value. A reasonable default is to forward to deserialize_i64
. Read more
fn deserialize_i64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an i64
value.
fn deserialize_f32<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a f32
value. A reasonable default is to forward to deserialize_f64
. Read more
fn deserialize_f64<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a f64
value.
fn deserialize_char<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a char
value.
fn deserialize_str<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a &str
value.
fn deserialize_string<__V>(self,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a String
value.
fn deserialize_unit<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting an unit
value.
fn deserialize_option<__V>(self,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
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)
. Read more
fn deserialize_bytes<__V>(self, visitor: __V) -> Result<__V::Value, Self::Error> where __V: Visitor
This method hints that the Deserialize
type is expecting a &[u8]
. This allows deserializers that provide a custom byte vector serialization to properly deserialize the type. Read more
fn deserialize_map<__V>(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. Read more
fn deserialize_unit_struct<__V>(self,
_: &'static str,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: &'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. Read more
fn deserialize_newtype_struct<__V>(self,
_: &'static str,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: &'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. A reasonable default is to simply deserialize the expected value directly. Read more
fn deserialize_tuple_struct<__V>(self,
_: &'static str,
_: usize,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: &'static str,
_: 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. Read more
fn deserialize_struct<__V>(self,
_: &'static str,
_: &'static [&'static str],
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: &'static str,
_: &'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. Read more
fn deserialize_struct_field<__V>(self,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
visitor: __V)
-> Result<__V::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. Read more
fn deserialize_tuple<__V>(self,
_: usize,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: 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. Read more
fn deserialize_enum<__V>(self,
_: &'static str,
_: &'static [&'static str],
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
_: &'static str,
_: &'static [&'static str],
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
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. Read more
fn deserialize_ignored_any<__V>(self,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
visitor: __V)
-> Result<__V::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. Read more
fn deserialize_byte_buf<__V>(self,
visitor: __V)
-> Result<__V::Value, Self::Error> where __V: Visitor
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 and prevent needless intermediate allocations that would occur when going through &[u8]
. Read more
impl<I, E> MapVisitor for MapDeserializer<I, E> where I: Iterator,
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error
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I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::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::Value>, Self::Error> where T: DeserializeSeed
seed: T)
-> Result<Option<T::Value>, Self::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. Read more
fn visit_value_seed<T>(&mut self, seed: T) -> Result<T::Value, Self::Error> where T: DeserializeSeed
This returns a Ok(value)
for the next value in the map. Read more
fn visit_seed<TK, TV>(&mut self,
kseed: TK,
vseed: TV)
-> Result<Option<(TK::Value, TV::Value)>, Self::Error> where TK: DeserializeSeed, TV: DeserializeSeed
kseed: TK,
vseed: TV)
-> Result<Option<(TK::Value, TV::Value)>, Self::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. Read more
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. Read more
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. Read more
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. Read more
impl<I, E> SeqVisitor for MapDeserializer<I, E> where I: Iterator,
I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::Second: ValueDeserializer<E>,
E: Error
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I::Item: Pair,
I::Item::First: ValueDeserializer<E>,
I::Item::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::Value>, Self::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. Read more
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. Read more