Macro auto_const_array::auto_const_array

macro_rules! auto_const_array {
    () => { ... };
    ($(#[$attr:meta])* $vis:vis const $name:ident: [$t:ty; _] = [$($inner:expr,)*]; $($rest:tt)*) => { ... };
    ($(#[$attr:meta])* $vis:vis const $name:ident: [$t:ty; _] = [$($inner:expr),*]; $($rest:tt)*) => { ... };
    ($(#[$attr:meta])* $vis:vis const $name:ident: [$t:ty; _] = [$($inner:expr,)*]) => { ... };
    ($(#[$attr:meta])* $vis:vis const $name:ident: [$t:ty; _] = [$($inner:expr),*]) => { ... };
}

Declare a new const array without specify length. It helps when apply conditional compilation to part of a const array.

Syntax

The macro wraps any number of const array declarations(with length _).

use crate::auto_const_array;
auto_const_array! {
    pub const FOO: [u8; _] = [1, 2, 3];

    #[allow(unused)]
    const BAR: [u32; _] = [1];
}