Struct MapFrom

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pub struct MapFrom<E, T, F> { /* private fields */ }
Expand description

Combinator for converting items into ones that suited to the inner encoder by calling the given function.

This is created by calling EncodeExt::map_from method.

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impl<E, T, F> MapFrom<E, T, F>

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pub fn inner_ref(&self) -> &E

Returns a reference to the inner encoder.

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pub fn inner_mut(&mut self) -> &mut E

Returns a mutable reference to the inner encoder.

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pub fn into_inner(self) -> E

Takes ownership of this instance and returns the inner encoder.

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impl<E: Debug, T: Debug, F: Debug> Debug for MapFrom<E, T, F>

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

Formats the value using the given formatter. Read more
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impl<E, T, F> Encode for MapFrom<E, T, F>
where E: Encode, F: Fn(T) -> E::Item,

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type Item = T

The type of items to be encoded.
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fn encode(&mut self, buf: &mut [u8], eos: Eos) -> Result<usize>

Encodes the items in the encoder and writes the encoded bytes to the given buffer. Read more
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fn start_encoding(&mut self, item: Self::Item) -> Result<()>

Tries to start encoding the given item. Read more
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fn requiring_bytes(&self) -> ByteCount

Returns the number of bytes required to encode all the items in the encoder. Read more
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fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false. Read more
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impl<E, T, F> SizedEncode for MapFrom<E, T, F>
where E: SizedEncode, F: Fn(T) -> E::Item,

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fn exact_requiring_bytes(&self) -> u64

Returns the exact number of bytes required to encode all the items remaining in the encoder.

Auto Trait Implementations§

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impl<E, T, F> Freeze for MapFrom<E, T, F>
where E: Freeze, F: Freeze,

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impl<E, T, F> RefUnwindSafe for MapFrom<E, T, F>

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impl<E, T, F> Send for MapFrom<E, T, F>
where E: Send, F: Send, T: Send,

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impl<E, T, F> Sync for MapFrom<E, T, F>
where E: Sync, F: Sync, T: Sync,

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impl<E, T, F> Unpin for MapFrom<E, T, F>
where E: Unpin, F: Unpin, T: Unpin,

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impl<E, T, F> UnwindSafe for MapFrom<E, T, F>
where E: UnwindSafe, F: UnwindSafe, T: UnwindSafe,

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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> EncodeExt for T
where T: Encode,

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fn with_item(item: Self::Item) -> Result<Self>
where Self: Default,

Creates a new encoder instance that has the given initial item. Read more
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fn map_err<E, F>(self, f: F) -> MapErr<Self, E, F>
where F: Fn(Error) -> E, Error: From<E>,

Creates an encoder for modifying encoding errors produced by self. Read more
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fn map_from<T, F>(self, f: F) -> MapFrom<Self, T, F>
where F: Fn(T) -> Self::Item,

Creates an encoder that converts items into ones that suited to the self encoder by calling the given function. Read more
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fn try_map_from<T, E, F>(self, f: F) -> TryMapFrom<Self, T, E, F>
where F: Fn(T) -> Result<Self::Item, E>, Error: From<E>,

Creates an encoder that tries to convert items into ones that suited to the self encoder by calling the given function. Read more
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fn optional(self) -> Optional<Self>

Creates an encoder that represents an optional encoder. Read more
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fn max_bytes(self, n: u64) -> MaxBytes<Self>

Creates an encoder that will fail if the number of encoded bytes of an item exceeds n. Read more
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fn length(self, n: u64) -> Length<Self>

Creates an encoder that required to encode each item exactly at the specified number of bytes. Read more
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fn chain<T: Encode>(self, other: T) -> TupleEncoder<(Self, T)>

Takes two encoders and creates a new encoder that encodes both items in sequence. Read more
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fn repeat<I>(self) -> Repeat<Self, I>
where I: Iterator<Item = Self::Item>,

Creates an encoder that repeats encoding of Self::Item. Read more
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fn pre_encode(self) -> PreEncode<Self>

Creates an encoder that pre-encodes items when start_encoding method is called. Read more
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fn slice(self) -> Slice<Self>

Creates an encoder that makes it possible to slice the encoded byte sequence in arbitrary units. Read more
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fn last(self, item: Self::Item) -> Last<Self>

Creates an encoder that cannot accept any more items except the given one.
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fn encode_into_bytes(&mut self, item: Self::Item) -> Result<Vec<u8>>

Encodes the given item and returns the resulting bytes. 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> IoEncodeExt for T
where T: Encode,

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fn encode_to_write_buf<B>(&mut self, buf: &mut WriteBuf<B>) -> Result<()>
where B: AsMut<[u8]>,

Encodes the items remaining in the encoder and writes the encoded bytes to the given write buffer.
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fn encode_to_write_buf_async<B>( &mut self, buf: &mut WriteBuf<B>, cx: &mut Context<'_>, ) -> Result<()>
where B: AsMut<[u8]>,

Encodes the items remaining in the encoder and writes the encoded bytes to the given write buffer. If the write buffer is full and the writing cannot be performed, the given WriteBuf will memorize cx’s Waker. This Waker’s wake will later be called when the WriteBuf regains its free space.
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fn encode_all<W: Write>(&mut self, writer: W) -> Result<()>

Encodes all of the items remaining in the encoder and writes the encoded bytes to the given writer. 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.