Struct Window

pub struct Window<T> { /* private fields */ }

An owned window around an underlying buffer.

Normally slices work great for considering sub-portions of a buffer, but unfortunately a slice is a borrowed type in Rust which has an associated lifetime. When working with future and async I/O these lifetimes are not always appropriate, and are sometimes difficult to store in tasks. This type strives to fill this gap by providing an "owned slice" around an underlying buffer of bytes.

A Window<T> wraps an underlying buffer, T, and has configurable start/end indexes to alter the behavior of the AsRef<[u8]> implementation that this type carries.

This type can be particularly useful when working with the write_all combinator in this crate. Data can be sliced via Window, consumed by write_all, and then earned back once the write operation finishes through the into_inner method on this type.

Implementations

impl<T: AsRef<[u8]>> Window<T>

fn new(t: T) -> Self

Creates a new window around the buffer t defaulting to the entire slice.

Further methods can be called on the returned Window<T> to alter the window into the data provided.

fn get_ref(&self) -> &T

Gets a shared reference to the underlying buffer inside of this Window.

fn get_mut(&mut self) -> &mut T

Gets a mutable reference to the underlying buffer inside of this Window.

fn into_inner(self) -> T

Consumes this Window, returning the underlying buffer.

fn start(&self) -> usize

Returns the starting index of this window into the underlying buffer T.

fn end(&self) -> usize

Returns the end index of this window into the underlying buffer T.

fn set<R: RangeBounds<usize>>(&mut self, range: R)

Changes the range of this window to the range specified.

Panics

This method will panic if range is out of bounds for the underlying slice or if start_bound() of range comes after the end_bound().

Trait Implementations

impl<T: AsMut<[u8]>> AsMut<[u8]> for Window<T>

fn as_mut(&mut self) -> &mut [u8]

impl<T: AsRef<[u8]>> AsRef<[u8]> for Window<T>

fn as_ref(&self) -> &[u8]

impl<T: Debug> Debug for Window<T>

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Auto Trait Implementations

impl<T> Freeze for Window<T> where T: Freeze,

impl<T> RefUnwindSafe for Window<T> where T: RefUnwindSafe,

impl<T> Send for Window<T> where T: Send,

impl<T> Sync for Window<T> where T: Sync,

impl<T> Unpin for Window<T> where T: Unpin,

impl<T> UnsafeUnpin for Window<T> where T: UnsafeUnpin,

impl<T> UnwindSafe for Window<T> where T: UnwindSafe,

Blanket Implementations

impl<T> Any for Window<T> where T: 'static + ?Sized,

fn type_id(&self) -> TypeId

impl<T> Borrow<T> for Window<T> where T: ?Sized,

fn borrow(&self) -> &T

impl<T> BorrowMut<T> for Window<T> where T: ?Sized,

fn borrow_mut(&mut self) -> &mut T

impl<T> From<T> for Window<T>

fn from(t: T) -> T

Returns the argument unchanged.

impl<T, U> Into<U> for Window<T> where U: From<T>,

fn into(self) -> U

Calls U::from(self).

That is, this conversion is whatever the implementation of [From]<T> for U chooses to do.

impl<T, U> TryFrom<U> for Window<T> where U: Into<T>,

type Error = never;
fn try_from(value: U) -> Result<T, never>

impl<T, U> TryInto<U> for Window<T> where U: TryFrom<T>,

type Error = <U as TryFrom<T>>::Error;
fn try_into(self) -> Result<U, <U as TryFrom<T>>::Error>