Trait destream::en::Encoder [−][src]
A data format that can encode and stream any data structure supported by destream.
Based on serde::ser::Serializer
.
Associated Types
type Ok: Stream + Send + Unpin + 'en
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The output type produced by this Encoder
.
type Error: Error + Send + Unpin + 'en
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The type returned when an encoding error is encountered.
type EncodeMap: EncodeMap<'en, Ok = Self::Ok, Error = Self::Error>
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Type returned from encode_map
for streaming the content of the map.
type EncodeSeq: EncodeSeq<'en, Ok = Self::Ok, Error = Self::Error>
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Type returned from encode_seq
for streaming the content of the sequence.
type EncodeTuple: EncodeTuple<'en, Ok = Self::Ok, Error = Self::Error>
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Type returned from encode_tuple
for streaming the content of the tuple.
Required methods
fn encode_bool(self, v: bool) -> Result<Self::Ok, Self::Error>
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Encode a bool
.
fn encode_i8(self, v: i8) -> Result<Self::Ok, Self::Error>
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Encode an i8
.
fn encode_i16(self, v: i16) -> Result<Self::Ok, Self::Error>
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Encode an i16
.
fn encode_i32(self, v: i32) -> Result<Self::Ok, Self::Error>
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Encode an i32
.
fn encode_i64(self, v: i64) -> Result<Self::Ok, Self::Error>
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Encode an i64
.
fn encode_u8(self, v: u8) -> Result<Self::Ok, Self::Error>
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Encode a u8
.
fn encode_u16(self, v: u16) -> Result<Self::Ok, Self::Error>
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Encode a u16
.
fn encode_u32(self, v: u32) -> Result<Self::Ok, Self::Error>
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Encode a u32
.
fn encode_u64(self, v: u64) -> Result<Self::Ok, Self::Error>
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Encode a u64
.
fn encode_f32(self, v: f32) -> Result<Self::Ok, Self::Error>
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Encode an f32
value.
fn encode_f64(self, v: f64) -> Result<Self::Ok, Self::Error>
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Encode an f64
value.
fn encode_str(self, v: &str) -> Result<Self::Ok, Self::Error>
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Encode a &str
.
fn encode_bytes(self, v: &[u8]) -> Result<Self::Ok, Self::Error>
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Encode a byte buffer.
fn encode_none(self) -> Result<Self::Ok, Self::Error>
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Encode a None
value.
fn encode_some<T: IntoStream<'en> + 'en>(
self,
value: T
) -> Result<Self::Ok, Self::Error>
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self,
value: T
) -> Result<Self::Ok, Self::Error>
Encode a Some(T)
value.
fn encode_unit(self) -> Result<Self::Ok, Self::Error>
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Encode a ()
value.
fn encode_map(self, len: Option<usize>) -> Result<Self::EncodeMap, Self::Error>
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Begin encoding a map.
This call must be followed by zero or more calls to encode_key
and encode_value
,
then end
.
The argument is the number of elements in the map, which may or may not be computable before iterating over the map.
fn encode_map_stream<K: IntoStream<'en> + 'en, V: IntoStream<'en> + 'en, S: Stream<Item = Result<(K, V), Self::Error>> + Send + Unpin + 'en>(
self,
map: S
) -> Result<Self::Ok, Self::Error>
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self,
map: S
) -> Result<Self::Ok, Self::Error>
Given a stream of encodable key-value pairs, return a stream encoded as a map.
fn encode_seq(self, len: Option<usize>) -> Result<Self::EncodeSeq, Self::Error>
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Begin encoding a variably sized sequence.
This call must be followed by zero or more calls to encode_element
, then end
.
The argument is the number of elements in the sequence, which may or may not be computable before iterating over the sequence.
fn encode_seq_stream<T: IntoStream<'en> + 'en, S: Stream<Item = Result<T, Self::Error>> + Send + Unpin + 'en>(
self,
seq: S
) -> Result<Self::Ok, Self::Error>
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self,
seq: S
) -> Result<Self::Ok, Self::Error>
Given a stream of encodable values, return a stream encoded as a sequence.
fn encode_tuple(self, len: usize) -> Result<Self::EncodeTuple, Self::Error>
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Begin encoding a statically sized sequence whose length will be known at decoding time
without looking at the encoded data.
This call must be followed by zero or more calls to encode_element
, then end
.
Provided methods
fn collect_seq<T: IntoStream<'en> + 'en, I: IntoIterator<Item = T>>(
self,
iter: I
) -> Result<Self::Ok, Self::Error>
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self,
iter: I
) -> Result<Self::Ok, Self::Error>
Collect an iterator as a sequence.
The default implementation encodes each item yielded by the iterator using encode_seq
.
Implementors should not need to override this method.
fn collect_map<K, V, I>(self, iter: I) -> Result<Self::Ok, Self::Error> where
K: IntoStream<'en> + 'en,
V: IntoStream<'en> + 'en,
I: IntoIterator<Item = (K, V)>,
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K: IntoStream<'en> + 'en,
V: IntoStream<'en> + 'en,
I: IntoIterator<Item = (K, V)>,
Collect an iterator as a map.
The default implementation encodes each pair yielded by the iterator using encode_map
.
Implementors should not need to override this method.
fn collect_str<T: Display + ?Sized>(
self,
value: &T
) -> Result<Self::Ok, Self::Error>
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self,
value: &T
) -> Result<Self::Ok, Self::Error>
Encode a string produced by an implementation of Display
.