array.md

Array types

r[type.array]

r[type.array.syntax]

^Syntax
ArrayType :
   [ Type ; Expression ]

r[type.array.intro] An array is a fixed-size sequence of N elements of type T. The array type is written as [T; N].

r[type.array.constraint] The size is a constant expression that evaluates to a usize.

Examples:

// A stack-allocated array
let array: [i32; 3] = [1, 2, 3];

// A heap-allocated array, coerced to a slice
let boxed_array: Box<[i32]> = Box::new([1, 2, 3]);

r[type.array.index] All elements of arrays are always initialized, and access to an array is always bounds-checked in safe methods and operators.

Note: The [Vec<T>] standard library type provides a heap-allocated resizable array type.

r[type.array.repr] An array value is represented by each element in ascending index order, placed immediately adjacent in memory.