Trait enso_flexer::prelude::DerefMut

pub trait DerefMut: Deref {
    fn deref_mut(&mut self) -> &mut Self::Target;
}

Used for mutable dereferencing operations, like in *v = 1;.

In addition to being used for explicit dereferencing operations with the (unary) * operator in mutable contexts, DerefMut is also used implicitly by the compiler in many circumstances. This mechanism is called ‘Deref coercion’. In immutable contexts, Deref is used.

Implementing DerefMut for smart pointers makes mutating the data behind them convenient, which is why they implement DerefMut. On the other hand, the rules regarding Deref and DerefMut were designed specifically to accommodate smart pointers. Because of this, DerefMut should only be implemented for smart pointers to avoid confusion.

For similar reasons, this trait should never fail. Failure during dereferencing can be extremely confusing when DerefMut is invoked implicitly.

More on Deref coercion

If T implements DerefMut<Target = U>, and x is a value of type T, then:

• In mutable contexts, *x (where T is neither a reference nor a raw pointer) is equivalent to *DerefMut::deref_mut(&mut x).
• Values of type &mut T are coerced to values of type &mut U
• T implicitly implements all the (mutable) methods of the type U.

For more details, visit the chapter in The Rust Programming Language as well as the reference sections on the dereference operator, method resolution and type coercions.

Examples

A struct with a single field which is modifiable by dereferencing the struct.

use std::ops::{Deref, DerefMut};

struct DerefMutExample<T> {
    value: T
}

impl<T> Deref for DerefMutExample<T> {
    type Target = T;

    fn deref(&self) -> &Self::Target {
        &self.value
    }
}

impl<T> DerefMut for DerefMutExample<T> {
    fn deref_mut(&mut self) -> &mut Self::Target {
        &mut self.value
    }
}

let mut x = DerefMutExample { value: 'a' };
*x = 'b';
assert_eq!('b', *x);

Required methods

fn deref_mut(&mut self) -> &mut Self::Target

Mutably dereferences the value.

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Implementations on Foreign Types

impl<'a> DerefMut for IoSliceMut<'a>

pub fn deref_mut(&mut self) -> &mut [u8]

impl DerefMut for OsString

pub fn deref_mut(&mut self) -> &mut OsStr

impl<'_, T> DerefMut for RwLockWriteGuard<'_, T> where
    T: ?Sized, 

pub fn deref_mut(&mut self) -> &mut T

impl<T> DerefMut for AssertUnwindSafe<T>

pub fn deref_mut(&mut self) -> &mut T

impl<'_, T> DerefMut for MutexGuard<'_, T> where
    T: ?Sized, 

pub fn deref_mut(&mut self) -> &mut T

impl<'_, T> !DerefMut for &'_ T where
    T: ?Sized, 

impl<P> DerefMut for Pin<P> where
    P: DerefMut,
    <P as Deref>::Target: Unpin, 

pub fn deref_mut(&mut self) -> &mut <P as Deref>::Target

impl<'a, 'f> DerefMut for VaList<'a, 'f> where
    'f: 'a, 

pub fn deref_mut(&mut self) -> &mut VaListImpl<'f>

impl<'_, T> DerefMut for &'_ mut T where
    T: ?Sized, 

pub fn deref_mut(&mut self) -> &mut T

impl DerefMut for String

pub fn deref_mut(&mut self) -> &mut str

impl<T, A> DerefMut for Vec<T, A> where
    A: Allocator, 

pub fn deref_mut(&mut self) -> &mut [T]

impl<T, A> DerefMut for Box<T, A> where
    T: ?Sized,
    A: Allocator, 

pub fn deref_mut(&mut self) -> &mut T

impl<'_, T> DerefMut for PeekMut<'_, T> where
    T: Ord, 

pub fn deref_mut(&mut self) -> &mut T

impl<L, R> DerefMut for Either<L, R> where
    R: DerefMut<Target = <L as Deref>::Target>,
    L: DerefMut, 

pub fn deref_mut(&mut self) -> &mut <Either<L, R> as Deref>::Target

impl<T> DerefMut for Clamped<T>

pub fn deref_mut(&mut self) -> &mut T

impl<N, S> DerefMut for Matrix<N, U3, U2, S> where
    S: ContiguousStorageMut<N, U3, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U2, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U5, S> where
    S: ContiguousStorageMut<N, U2, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U5, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U3, S> where
    S: ContiguousStorageMut<N, U5, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U3, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U3, U4, S> where
    S: ContiguousStorageMut<N, U3, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U4, S> as Deref>::Target

impl<N, R, C> DerefMut for ArrayStorage<N, R, C> where
    C: DimName,
    R: DimName,
    <R as DimName>::Value: Mul<<C as DimName>::Value>,
    <<R as DimName>::Value as Mul<<C as DimName>::Value>>::Output: ArrayLength<N>, 

pub fn deref_mut(&mut self) -> &mut <ArrayStorage<N, R, C> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U4, S> where
    S: ContiguousStorageMut<N, U5, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U4, S> as Deref>::Target

impl<N> DerefMut for Point<N, U5> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U5, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U5> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U6, S> where
    S: ContiguousStorageMut<N, U6, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U6, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U1, S> where
    S: ContiguousStorageMut<N, U1, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U1, S> where
    S: ContiguousStorageMut<N, U5, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U5, S> where
    S: ContiguousStorageMut<N, U5, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U5, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U3, U5, S> where
    S: ContiguousStorageMut<N, U3, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U5, S> as Deref>::Target

impl<N> DerefMut for Point<N, U4> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U4, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U4> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U1, S> where
    S: ContiguousStorageMut<N, U6, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U2, S> where
    S: ContiguousStorageMut<N, U2, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U2, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U2, S> where
    S: ContiguousStorageMut<N, U5, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U2, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U2, S> where
    S: ContiguousStorageMut<N, U6, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U2, S> as Deref>::Target

impl<N> DerefMut for Translation<N, U4> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U4, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U4> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U3, U1, S> where
    S: ContiguousStorageMut<N, U3, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U1, S> where
    S: ContiguousStorageMut<N, U4, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U4, S> where
    S: ContiguousStorageMut<N, U4, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U4, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U5, S> where
    S: ContiguousStorageMut<N, U6, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U5, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U5, S> where
    S: ContiguousStorageMut<N, U4, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U5, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U1, S> where
    S: ContiguousStorageMut<N, U2, U1>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U1, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U5, U6, S> where
    S: ContiguousStorageMut<N, U5, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U5, U6, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U2, S> where
    S: ContiguousStorageMut<N, U4, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U2, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U4, S> where
    S: ContiguousStorageMut<N, U2, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U4, S> as Deref>::Target

impl<N> DerefMut for Translation<N, U3> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U3, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U3> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U6, S> where
    S: ContiguousStorageMut<N, U2, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U6, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U6, S> where
    S: ContiguousStorageMut<N, U4, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U6, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U4, S> where
    S: ContiguousStorageMut<N, U6, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U4, S> as Deref>::Target

impl<N> DerefMut for Point<N, U1> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U1, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U1> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U3, S> where
    S: ContiguousStorageMut<N, U1, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U3, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U6, S> where
    S: ContiguousStorageMut<N, U1, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U6, S> as Deref>::Target

impl<N> DerefMut for Translation<N, U6> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U6, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U6> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U3, U3, S> where
    S: ContiguousStorageMut<N, U3, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U3, S> as Deref>::Target

impl<N> DerefMut for Point<N, U3> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U3, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U3> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U5, S> where
    S: ContiguousStorageMut<N, U1, U5>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U5, S> as Deref>::Target

impl<N> DerefMut for Translation<N, U2> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U2, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U2> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U6, U3, S> where
    S: ContiguousStorageMut<N, U6, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U6, U3, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U4, U3, S> where
    S: ContiguousStorageMut<N, U4, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U4, U3, S> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U2, S> where
    S: ContiguousStorageMut<N, U1, U2>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U2, S> as Deref>::Target

impl<N> DerefMut for Translation<N, U5> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U5, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U5> as Deref>::Target

impl<N> DerefMut for Quaternion<N> where
    N: Scalar + SimdValue, 

pub fn deref_mut(&mut self) -> &mut <Quaternion<N> as Deref>::Target

impl<N> DerefMut for Translation<N, U1> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U1, U1>, 

pub fn deref_mut(&mut self) -> &mut <Translation<N, U1> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U1, U4, S> where
    S: ContiguousStorageMut<N, U1, U4>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U1, U4, S> as Deref>::Target

impl<N> DerefMut for Point<N, U6> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U6, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U6> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U3, U6, S> where
    S: ContiguousStorageMut<N, U3, U6>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U3, U6, S> as Deref>::Target

impl<N> DerefMut for Point<N, U2> where
    N: Scalar,
    DefaultAllocator: Allocator<N, U2, U1>, 

pub fn deref_mut(&mut self) -> &mut <Point<N, U2> as Deref>::Target

impl<N, S> DerefMut for Matrix<N, U2, U3, S> where
    S: ContiguousStorageMut<N, U2, U3>,
    N: Scalar, 

pub fn deref_mut(&mut self) -> &mut <Matrix<N, U2, U3, S> as Deref>::Target

impl<T, N> DerefMut for GenericArray<T, N> where
    N: ArrayLength<T>, 

pub fn deref_mut(&mut self) -> &mut [T]

impl DerefMut for Bang

pub fn deref_mut(&mut self) -> &mut <Bang as Deref>::Target

impl DerefMut for Gt

pub fn deref_mut(&mut self) -> &mut <Gt as Deref>::Target

impl DerefMut for Rem

pub fn deref_mut(&mut self) -> &mut <Rem as Deref>::Target

impl DerefMut for Eq

pub fn deref_mut(&mut self) -> &mut <Eq as Deref>::Target

impl DerefMut for Or

pub fn deref_mut(&mut self) -> &mut <Or as Deref>::Target

impl DerefMut for And

pub fn deref_mut(&mut self) -> &mut <And as Deref>::Target

impl DerefMut for Semi

pub fn deref_mut(&mut self) -> &mut <Semi as Deref>::Target

impl DerefMut for Underscore

pub fn deref_mut(&mut self) -> &mut <Underscore as Deref>::Target

impl DerefMut for Colon

pub fn deref_mut(&mut self) -> &mut <Colon as Deref>::Target

impl DerefMut for Tilde

pub fn deref_mut(&mut self) -> &mut <Tilde as Deref>::Target

impl DerefMut for Comma

pub fn deref_mut(&mut self) -> &mut <Comma as Deref>::Target

impl DerefMut for Dollar

pub fn deref_mut(&mut self) -> &mut <Dollar as Deref>::Target

impl DerefMut for Add

pub fn deref_mut(&mut self) -> &mut <Add as Deref>::Target

impl DerefMut for Div

pub fn deref_mut(&mut self) -> &mut <Div as Deref>::Target

impl DerefMut for Caret

pub fn deref_mut(&mut self) -> &mut <Caret as Deref>::Target

impl DerefMut for Dot

pub fn deref_mut(&mut self) -> &mut <Dot as Deref>::Target

impl DerefMut for Question

pub fn deref_mut(&mut self) -> &mut <Question as Deref>::Target

impl DerefMut for Pound

pub fn deref_mut(&mut self) -> &mut <Pound as Deref>::Target

impl DerefMut for Star

pub fn deref_mut(&mut self) -> &mut <Star as Deref>::Target

impl DerefMut for At

pub fn deref_mut(&mut self) -> &mut <At as Deref>::Target

impl DerefMut for Sub

pub fn deref_mut(&mut self) -> &mut <Sub as Deref>::Target

impl DerefMut for Lt

pub fn deref_mut(&mut self) -> &mut <Lt as Deref>::Target

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Implementors

impl DerefMut for AutomatonData

fn deref_mut(&mut self) -> &mut Self::Target

impl<'_, T> DerefMut for RefMut<'_, T> where
    T: ?Sized, 

pub fn deref_mut(&mut self) -> &mut T

impl<A> DerefMut for SmallVec<A> where
    A: Array, 

pub fn deref_mut(&mut self) -> &mut [<A as Array>::Item]

impl<Definition, Output, Logger> DerefMut for Flexer<Definition, Output, Logger>

fn deref_mut(&mut self) -> &mut Self::Target

impl<T> DerefMut for ManuallyDrop<T> where
    T: ?Sized, 

pub fn deref_mut(&mut self) -> &mut T

impl<T, P> DerefMut for WithPhantom<T, P>

pub fn deref_mut(&mut self) -> &mut <WithPhantom<T, P> as Deref>::Target

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