Trait std::ops::DerefMutExperimental
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pub trait DerefMut<Result>: Deref<Result> { fn deref_mut(&'a mut self) -> &'a mut Result; }
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.
struct DerefMutExample<T> { value: T } impl<T> Deref<T> for DerefMutExample<T> { fn deref<'a>(&'a self) -> &'a T { &self.value } } impl<T> DerefMut<T> 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); }struct DerefMutExample<T> { value: T } impl<T> Deref<T> for DerefMutExample<T> { fn deref<'a>(&'a self) -> &'a T { &self.value } } impl<T> DerefMut<T> 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 Result
The method called to mutably dereference a value
Implementors
impl<'a, T> DerefMut<T> for &'a mut T
impl<'b, T> DerefMut<T> for RefMut<'b, T>
impl<'a> DerefMut<BufferedReader<StdReader>> for StdinReaderGuard<'a>
impl<'id, T> DerefMut<T> for IdRef<'id, T>
impl<T> DerefMut<[T]> for Vec<T>
impl<'mutex, T> DerefMut<T> for MutexGuard<'mutex, T>
impl<'rwlock, T> DerefMut<T> for RWLockWriteGuard<'rwlock, T>
impl<T> DerefMut<T> for Box<T>