Macro assert_matches

macro_rules! assert_matches {
    ($expression:expr, $($pattern:tt)+) => { ... };
}

Assert that an expression matches a refutable pattern.

Syntax: assert_matches!( expression , pattern )

Panic with a message that shows the expression if it does not match the pattern.

Examples

#[macro_use]
extern crate matches;

fn main() {
    let data = [1, 2, 3];
    assert_matches!(data.get(1), Some(_));
}