Macro claym::assert_matches

macro_rules! assert_matches {
    ($expression:expr, $($pattern:pat_param)|+ $(if $guard:expr)? $(,)?) => { ... };
    ($expression:expr, $($pattern:pat_param)|+ $(if $guard:expr)?, $($arg:tt)+) => { ... };
}

Asserts that expression matches any of the given variants.