Macro compile_fmt::compile_assert

macro_rules! compile_assert {
    ($check:expr, $($arg:tt)+) => { ... };
}

Version of the assert! macro with the ability to format args in compile time.

The first argument of the macro must be a boolean value. The remaining arguments have the same syntax as in the compile_args! macro.

Examples

use compile_fmt::{compile_assert, fmt};

const fn check_args(x: usize, s: &str) {
    const MAX_STR_LEN: usize = 10;

    compile_assert!(
        x < 1_000,
        "`x` should be less than 1000 (got: ",
        x => fmt::<usize>(), ")"
    );
    compile_assert!(
        s.len() <= MAX_STR_LEN,
        "String is too long (expected at most ", MAX_STR_LEN,
        " bytes; got ", s.len() => fmt::<usize>(), " bytes)"
    );
    // main logic...
}