Trait io::KnownLength

pub trait KnownLength {
    fn len(&self) -> usize;
}

A trait that represents an I/O stream that has a known length, e.g., a disk drive.

This trait exists to enable seeking to an offset from the end of the stream.

Required Methods

fn len(&self) -> usize

Returns the length (size in bytes) of this I/O stream or device.

Implementations on Foreign Types

impl<KL> KnownLength for Box<KL>where
    KL: KnownLength + ?Sized,

fn len(&self) -> usize

impl<KL> KnownLength for &KLwhere
    KL: KnownLength + ?Sized,

fn len(&self) -> usize

impl<KL> KnownLength for &mut KLwhere
    KL: KnownLength + ?Sized,

fn len(&self) -> usize

Implementors

impl<'io, IO, L, B> KnownLength for LockableIo<'io, IO, L, B>where
    IO: KnownLength + 'io + ?Sized,
    L: for<'a> Lockable<'a, IO> + ?Sized,
    B: Borrow<L>,

impl<IO> KnownLength for Reader<IO>where
    IO: KnownLength,

impl<IO> KnownLength for ReaderWriter<IO>where
    IO: KnownLength,

impl<IO> KnownLength for Writer<IO>where
    IO: KnownLength,

impl<R> KnownLength for ByteReaderWrapper<R>where
    R: KnownLength + BlockReader,

impl<RW> KnownLength for ByteReaderWriterWrapper<RW>where
    RW: KnownLength + BlockReader + BlockWriter,

impl<RW> KnownLength for ByteWriterWrapper<RW>where
    RW: KnownLength + BlockReader + BlockWriter,