Trait Len 

pub trait Len {
    // Required method
    fn len(&self) -> u64;

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

Trait for readers that can report their total length.

Required Methods

fn len(&self) -> u64

Returns the total number of bytes available.

Provided Methods

fn is_empty(&self) -> bool

Returns true when the length is zero.

Dyn Compatibility

This trait is dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementations on Foreign Types

impl<F> Len for Seekable<F>

where F: Fn() -> RequestBuilder + Send + Sync + 'static,

fn len(&self) -> u64

impl<T: Len + AsyncRead> Len for BufReader<T>

fn len(&self) -> u64

Implementors

impl Len for EpochStream