Struct bytecodec::StartEncoderChain

pub struct StartEncoderChain;

An object for starting a chain of encoders.

Examples

use bytecodec::{Encode, EncodeExt, StartEncoderChain};
use bytecodec::bytes::Utf8Encoder;
use bytecodec::fixnum::U8Encoder;
use bytecodec::io::IoEncodeExt;

let mut output = Vec::new();
let mut encoder = StartEncoderChain
    .chain(U8Encoder::new())
    .chain(Utf8Encoder::new())
    .map_from(|s: String| (s.len() as u8, s));
encoder.start_encoding("foo".to_owned()).unwrap();
encoder.encode_all(&mut output).unwrap();
assert_eq!(output, b"\x03foo");

Methods

impl StartEncoderChain

pub fn chain<E: Encode>(&self, encoder: E) -> EncoderChain<Self, E, ()>

Starts encoders chain.

Trait Implementations

impl Debug for StartEncoderChain

fn fmt(&self, __arg_0: &mut Formatter) -> Result

Formats the value using the given formatter.

impl Encode for StartEncoderChain

type Item = ()

The type of items to be encoded.

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.

fn start_encoding(&mut self, _item: Self::Item) -> Result<()>

Tries to start encoding the given item.

fn is_idle(&self) -> bool

Returns true if there are no items to be encoded in the encoder, otherwise false.

fn requiring_bytes(&self) -> ByteCount

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

fn cancel(&mut self) -> Result<()>

Cancels the current encoding and makes the encoder's state idle.

impl ExactBytesEncode for StartEncoderChain

fn exact_requiring_bytes(&self) -> u64

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