Trait ExactSizeEncoder 

pub trait ExactSizeEncoder: Encoder {
    // Required method
    fn len(&self) -> usize;

    // Provided method
    fn is_empty(&self) -> bool { ... }
}

An encoder with a known size.

Required Methods

fn len(&self) -> usize

The number of bytes remaining that the encoder will yield.

Provided Methods

fn is_empty(&self) -> bool

Returns whether the encoder would yield an empty response.

Implementations on Foreign Types

impl<T: Encoder + ExactSizeEncoder> ExactSizeEncoder for Option<T>

fn len(&self) -> usize

Implementors

impl ExactSizeEncoder for CompactSizeEncoder

impl<'e, T> ExactSizeEncoder for SliceEncoder<'e, T>

where T: Encodable + 'e, T::Encoder<'e>: ExactSizeEncoder,

impl<'sl> ExactSizeEncoder for BytesEncoder<'sl>

impl<A, B> ExactSizeEncoder for Encoder2<A, B>

where A: Encoder + ExactSizeEncoder, B: Encoder + ExactSizeEncoder,

impl<A, B, C> ExactSizeEncoder for Encoder3<A, B, C>

where A: Encoder + ExactSizeEncoder, B: Encoder + ExactSizeEncoder, C: Encoder + ExactSizeEncoder,

impl<A, B, C, D> ExactSizeEncoder for Encoder4<A, B, C, D>

where A: Encoder + ExactSizeEncoder, B: Encoder + ExactSizeEncoder, C: Encoder + ExactSizeEncoder, D: Encoder + ExactSizeEncoder,

impl<A, B, C, D, E, F> ExactSizeEncoder for Encoder6<A, B, C, D, E, F>

where A: Encoder + ExactSizeEncoder, B: Encoder + ExactSizeEncoder, C: Encoder + ExactSizeEncoder, D: Encoder + ExactSizeEncoder, E: Encoder + ExactSizeEncoder, F: Encoder + ExactSizeEncoder,

impl<const N: usize> ExactSizeEncoder for ArrayEncoder<N>

impl<const N: usize> ExactSizeEncoder for ArrayRefEncoder<'_, N>