https://github.com/haraldh/array-const-fn-init

Initializes an array with constant values calculated by a `const fn`
https://github.com/haraldh/array-const-fn-init

Last synced: 3 months ago
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Initializes an array with constant values calculated by a `const fn`

• Host: GitHub
• URL: https://github.com/haraldh/array-const-fn-init
• Owner: haraldh
• License: apache-2.0
• Created: 2020-05-20T12:58:11.000Z (over 4 years ago)
• Default Branch: master
• Last Pushed: 2020-09-02T19:52:04.000Z (over 4 years ago)
• Last Synced: 2024-09-14T09:34:36.434Z (4 months ago)
• Language: Rust
• Size: 9.77 KB
• Stars: 5
• Watchers: 3
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE-APACHE

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README

        
# array-const-fn-init

Initializes an array with constant values calculated by a `const fn (usize) -> T`

Requires Rust >= 1.45

# Example

```rust

use array_const_fn_init::array_const_fn_init;

const fn const_double_it(i: usize) -> usize {

    i * 2

}

const ARRAY: [usize; 10] = array_const_fn_init![const_double_it; 10];

assert_eq!(ARRAY, [0, 2, 4, 6, 8, 10, 12, 14, 16, 18]);

```

```rust

use array_const_fn_init::array_const_fn_init;

const fn const_vecs(i: usize) -> (u8, u8, u8) {

    (i as u8, i as u8, i as u8)

}

const ARRAY: [(u8, u8, u8); 4] = array_const_fn_init![const_vecs; 4];

assert_eq!(ARRAY, [(0, 0, 0), (1, 1, 1), (2, 2, 2), (3, 3, 3)]);

```