# Macro std::matches

1.42.0 · source ·

    macro_rules! matches {
        ($expression:expr, $pattern:pat $(if $guard:expr)? $(,)?) => { ... };
    }

Expand description

Returns whether the given expression matches any of the given patterns.

Like in a `match` expression, the pattern can be optionally followed by `if` and a guard expression that has access to names bound by the pattern.

## Examples

    let foo = 'f';
    assert!(matches!(foo, 'A'..='Z' | 'a'..='z'));

    let bar = Some(4);
    assert!(matches!(bar, Some(x) if x > 2));

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