Trait IndexMut 

pub trait IndexMut<T>: Index<T> {
    type OutputMut<'a>
       where Self: 'a;

    // Required method
    fn index_mut(&mut self, idx: T) -> Self::OutputMut<'_>;
}

Index operator for mutable contexts. As opposed to std, the returned value can be a non-reference. This allows custom reference types for things like multi-dimensional matrices.

Required Associated Types

type OutputMut<'a> where Self: 'a

The output type of indexing this value

Required Methods

fn index_mut(&mut self, idx: T) -> Self::OutputMut<'_>

Get the value at this index mutably

Dyn Compatibility

This trait is not dyn compatible.

In older versions of Rust, dyn compatibility was called "object safety".

Implementors

impl<T, I> IndexMut<I> for T

where T: IndexMut<I> + ?Sized, T::Output: 'static,

type OutputMut<'a> = &'a mut <T as Index<I>>::Output where Self: 'a