Trait std::ops::DerefMutStable
[-] [+]
[src]
pub trait DerefMut: Deref where Self: Deref {
fn deref_mut(&'a mut self) -> &'a mut <Self as Deref>::Target;
}
The DerefMut
trait is used to specify the functionality of dereferencing
mutably like *v = 1;
Example
A struct with a single field which is modifiable via dereferencing the struct.
use std::ops::{Deref, DerefMut}; struct DerefMutExample<T> { value: T } impl<T> Deref for DerefMutExample<T> { type Target = T; fn deref<'a>(&'a self) -> &'a T { &self.value } } impl<T> DerefMut for DerefMutExample<T> { fn deref_mut<'a>(&'a mut self) -> &'a mut T { &mut self.value } } fn main() { let mut x = DerefMutExample { value: 'a' }; *x = 'b'; assert_eq!('b', *x); }use std::ops::{Deref, DerefMut}; struct DerefMutExample<T> { value: T } impl<T> Deref for DerefMutExample<T> { type Target = T; fn deref<'a>(&'a self) -> &'a T { &self.value } } impl<T> DerefMut for DerefMutExample<T> { fn deref_mut<'a>(&'a mut self) -> &'a mut T { &mut self.value } } fn main() { let mut x = DerefMutExample { value: 'a' }; *x = 'b'; assert_eq!('b', *x); }
Required Methods
fn deref_mut(&'a mut self) -> &'a mut <Self as Deref>::Target
The method called to mutably dereference a value
Implementors
impl<'a, T> DerefMut for &'a mut T where T: ?Sized
impl<'b, T> DerefMut for RefMut<'b, T>
impl<T> DerefMut for Box<T> where T: ?Sized
impl<'id, T> DerefMut for IdRef<'id, T>
impl<T> DerefMut for Vec<T>
impl<'a> DerefMut for StdinReaderGuard<'a>
impl<'mutex, T> DerefMut for MutexGuard<'mutex, T>
impl<'rwlock, T> DerefMut for RwLockWriteGuard<'rwlock, T>