Slice types
A slice is a dynamically sized type representing a ‘view’ into a sequence of
elements of type T. The slice type is written as [T].
Slice types are generally used through pointer types. For example:
&[T]: a ‘shared slice’, often just called a ‘slice’. It doesn’t own the data it points to; it borrows it.&mut [T]: a ‘mutable slice’. It mutably borrows the data it points to.Box<[T]>: a ‘boxed slice’
Examples:
#![allow(unused)] fn main() { // A heap-allocated array, coerced to a slice let boxed_array: Box<[i32]> = Box::new([1, 2, 3]); // A (shared) slice into an array let slice: &[i32] = &boxed_array[..]; }
All elements of slices are always initialized, and access to a slice is always bounds-checked in safe methods and operators.