Trait std::convert::AsMut

pub trait AsMut<T> where
    T: ?Sized, {
    fn as_mut(&mut self) -> &mut T;
}

A cheap, mutable reference-to-mutable reference conversion.

This trait is similar to AsRef but used for converting between mutable references.

Note: this trait must not fail. If the conversion can fail, use a dedicated method which returns an Option<T> or a Result<T, E>.

Generic Implementations

• AsMut auto-dereferences if the inner type is a mutable reference (e.g.: foo.as_mut() will work the same if foo has type &mut Foo or &mut &mut Foo)

Examples

Box<T> implements AsMut<T>:

fn add_one<T: AsMut<u64>>(num: &mut T) {
    *num.as_mut() += 1;
}

let mut boxed_num = Box::new(0);
add_one(&mut boxed_num);
assert_eq!(*boxed_num, 1);

Required Methods

Important traits for &'a mut I

impl<'a, I> Iterator for &'a mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;impl<'a, R: Read + ?Sized> Read for &'a mut Rimpl<'a, W: Write + ?Sized> Write for &'a mut W

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

Performs the conversion.

Implementors

• impl<T> AsMut<[T]> for [T; 22]
• impl<T> AsMut<[T]> for [T; 11]
• impl<T> AsMut<[T]> for [T; 3]
• impl<T> AsMut<[T]> for [T; 16]
• impl<T> AsMut<[T]> for [T; 4]
• impl<T> AsMut<[T]> for [T; 15]
• impl<T> AsMut<[T]> for [T; 28]
• impl<T> AsMut<[T]> for [T; 23]
• impl<T> AsMut<[T]> for [T; 26]
• impl<T> AsMut<[T]> for [T; 29]
• impl<T> AsMut<[T]> for [T; 5]
• impl<T> AsMut<[T]> for [T; 2]
• impl<T> AsMut<[T]> for [T; 1]
• impl<T> AsMut<[T]> for [T; 27]
• impl<T> AsMut<[T]> for [T; 14]
• impl<T> AsMut<[T]> for [T; 31]
• impl<T> AsMut<[T]> for [T; 0]
• impl<T> AsMut<[T]> for [T; 10]
• impl<T> AsMut<[T]> for [T; 7]
• impl<T> AsMut<[T]> for [T; 9]
• impl<T> AsMut<[T]> for [T; 13]
• impl<T> AsMut<[T]> for [T; 12]
• impl<T> AsMut<[T]> for [T; 24]
• impl<T> AsMut<[T]> for [T; 17]
• impl<T> AsMut<[T]> for [T; 6]
• impl<T> AsMut<[T]> for [T]
• impl<T> AsMut<[T]> for [T; 30]
• impl<T> AsMut<[T]> for [T; 8]
• impl<'a, T, U> AsMut<U> for &'a mut T where
    T: AsMut<U> + ?Sized,
    U: ?Sized, 
• impl<T> AsMut<[T]> for [T; 19]
• impl<T> AsMut<[T]> for [T; 18]
• impl<T> AsMut<[T]> for [T; 25]
• impl<T> AsMut<[T]> for [T; 20]
• impl<T> AsMut<[T]> for [T; 21]
• impl<T> AsMut<[T]> for [T; 32]
• impl<T> AsMut<[T]> for Vec<T>
• impl<T> AsMut<T> for Box<T> where
    T: ?Sized, 
• impl<T> AsMut<Vec<T>> for Vec<T>