mac::matches!

macro_rules! matches {
    ($expr:expr, $($pat:tt)+) => {
        _tt_as_expr_hack! {
            match $expr {
                $($pat)+ => true,
                _        => false
            }
        }
    }
}

Returns true if an expression matches a pattern.

Example

assert!(matches!(2, 1 | 2 | 3));
assert!(matches!('x', 'a' ... 'z'));
assert!(!matches!(Some(1), None));
assert!(matches!(Some(42), Some(n) if n == 42));