Trait nom::lib::std::convert::AsMut1.0.0[−][src]

pub trait AsMut<T> where
    T: ?Sized, {
    pub fn as_mut(&mut self) -> &mut Tⓘ
Notable traits for &'_ mut I
impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized,     type Item = <I as Iterator>::Item;
;
}
[−]

Used to do a cheap mutable-to-mutable reference conversion.

This trait is similar to AsRef but used for converting between mutable references. If you need to do a costly conversion it is better to implement From with type &mut T or write a custom function.

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

Examples

Using AsMut as trait bound for a generic function we can accept all mutable references that can be converted to type &mut T. Because Box<T> implements AsMut<T> we can write a function add_one that takes all arguments that can be converted to &mut u64. Because Box<T> implements AsMut<T>, add_one accepts arguments of type &mut Box<u64> as well:

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

pub fn as_mut(&mut self) -> &mut Tⓘ

Notable traits for &'_ mut I

impl<'_, I> Iterator for &'_ mut I where
    I: Iterator + ?Sized,  type Item = <I as Iterator>::Item;
[src][−]

Performs the conversion.

Implementations on Foreign Types

impl<T> AsMut<[T]> for [T][src][−]

impl<'_, T, U> AsMut<U> for &'_ mut T where
    T: AsMut<U> + ?Sized,
    U: ?Sized, [src][−]

impl AsMut<str> for str[src][−]

impl<T, const N: usize> AsMut<[T]> for [T; N][src][−]

Implementors

impl AsMut<str> for String1.43.0[src][+]

impl<T, A> AsMut<[T]> for Vec<T, A> where
    A: Allocator, 1.5.0[src][+]

impl<T, A> AsMut<Vec<T, A>> for Vec<T, A> where
    A: Allocator, 1.5.0[src][+]

impl<T, A> AsMut<T> for Box<T, A> where
    T: ?Sized,
    A: Allocator, 1.5.0[src][+]

impl<A: Array> AsMut<[<A as Array>::Item]> for ArrayVec<A>

impl AsMut<[u8]> for BString

impl AsMut<BStr> for BString

impl AsMut<[u8]> for BStr

impl AsMut<BStr> for [u8]

impl AsMut<[u8]> for BytesMut

impl<T: ?Sized + Pointable> AsMut<T> for Owned<T>

impl<L, R> AsMut<str> for Either<L, R> where
    L: AsMut<str>,
    R: AsMut<str>, 

impl<L, R, Target> AsMut<Target> for Either<L, R> where
    L: AsMut<Target>,
    R: AsMut<Target>, 

impl<L, R, Target> AsMut<[Target]> for Either<L, R> where
    L: AsMut<[Target]>,
    R: AsMut<[Target]>, 

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

impl<T, N> AsMut<[T]> for GenericArray<T, N> where
    N: ArrayLength<T>, 

impl<T> AsMut<[T; 1]> for GenericArray<T, U1>

impl<T> AsMut<[T; 2]> for GenericArray<T, U2>

impl<T> AsMut<[T; 3]> for GenericArray<T, U3>

impl<T> AsMut<[T; 4]> for GenericArray<T, U4>

impl<T> AsMut<[T; 5]> for GenericArray<T, U5>

impl<T> AsMut<[T; 6]> for GenericArray<T, U6>

impl<T> AsMut<[T; 7]> for GenericArray<T, U7>

impl<T> AsMut<[T; 8]> for GenericArray<T, U8>

impl<T> AsMut<[T; 9]> for GenericArray<T, U9>

impl<T> AsMut<[T; 10]> for GenericArray<T, U10>

impl<T> AsMut<[T; 11]> for GenericArray<T, U11>

impl<T> AsMut<[T; 12]> for GenericArray<T, U12>

impl<T> AsMut<[T; 13]> for GenericArray<T, U13>

impl<T> AsMut<[T; 14]> for GenericArray<T, U14>

impl<T> AsMut<[T; 15]> for GenericArray<T, U15>

impl<T> AsMut<[T; 16]> for GenericArray<T, U16>

impl<T> AsMut<[T; 17]> for GenericArray<T, U17>

impl<T> AsMut<[T; 18]> for GenericArray<T, U18>

impl<T> AsMut<[T; 19]> for GenericArray<T, U19>

impl<T> AsMut<[T; 20]> for GenericArray<T, U20>

impl<T> AsMut<[T; 21]> for GenericArray<T, U21>

impl<T> AsMut<[T; 22]> for GenericArray<T, U22>

impl<T> AsMut<[T; 23]> for GenericArray<T, U23>

impl<T> AsMut<[T; 24]> for GenericArray<T, U24>

impl<T> AsMut<[T; 25]> for GenericArray<T, U25>

impl<T> AsMut<[T; 26]> for GenericArray<T, U26>

impl<T> AsMut<[T; 27]> for GenericArray<T, U27>

impl<T> AsMut<[T; 28]> for GenericArray<T, U28>

impl<T> AsMut<[T; 29]> for GenericArray<T, U29>

impl<T> AsMut<[T; 30]> for GenericArray<T, U30>

impl<T> AsMut<[T; 31]> for GenericArray<T, U31>

impl<T> AsMut<[T; 32]> for GenericArray<T, U32>

impl AsMut<[u8]> for MmapMut

impl AsMut<timespec> for TimeSpec

impl AsMut<timeval> for TimeVal

impl<T: Float> AsMut<T> for OrderedFloat<T>

impl<T> AsMut<T> for Gray<T>

impl<T> AsMut<[T]> for RGB<T>

impl<T> AsMut<[T]> for RGBA<T>

impl<T> AsMut<T> for GrayAlpha<T>

impl<A: Array> AsMut<[<A as Array>::Item]> for SmallVec<A>

impl AsMut<[RpnExpressionNode]> for RpnExpression

impl<T: MibArg> AsMut<[usize]> for Mib<T>