[−][src]Trait smol::io::AsyncSeekExt

pub trait AsyncSeekExt: AsyncSeek {
    fn seek(&mut self, pos: SeekFrom) -> SeekFuture<'_, Self>ⓘNotable traits for SeekFuture<'_, S>
impl<'_, S> Future for SeekFuture<'_, S> where
    S: Unpin + AsyncSeek + ?Sized,     type Output = Result<u64, Error>;
    where
        Self: Unpin,
    { ... }
}

Extension trait for AsyncSeek.

Provided methods

`fn seek(&mut self, pos: SeekFrom) -> SeekFuture<'_, Self>ⓘNotable traits for SeekFuture<'_, S> impl<'_, S> Future for SeekFuture<'_, S> where S: Unpin + AsyncSeek + ?Sized, type Output = Result<u64, Error>; where Self: Unpin,`

Seeks to a new position in a byte stream.

Returns the new position in the byte stream.

A seek beyond the end of stream is allowed, but behavior is defined by the implementation.

Examples

use futures_lite::io::{AsyncSeekExt, Cursor, SeekFrom};

let mut cursor = Cursor::new("hello");

// Move the cursor to the end.
cursor.seek(SeekFrom::End(0)).await?;

// Check the current position.
assert_eq!(cursor.seek(SeekFrom::Current(0)).await?, 5);

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Implementors

`impl<S> AsyncSeekExt for S where S: AsyncSeek + ?Sized,` [src]