Expand description
A macro to evaluate, as a boolean, whether an expression matches a pattern.
For users who build using only Rust 1.42 and newer, consider usingstd::matches, whichis included in thestandard library prelude and thus is automatically in scope.
§Examples
#[macro_use]extern cratematches;#[derive(Debug)]pub enumFoo<T> { A, B(T),}impl<T> Foo<T> {pub fnis_b(&self) -> bool {matches!(*self, Foo::B(_)) }}impl<T: core::fmt::Debug> Foo<T> {pub fnassert_is_b(&self) {assert_matches!(&self, Foo::B(_)); }}Macros§
- assert_
matches - Assert that an expression matches a refutable pattern.
- debug_
assert_ matches - Assert that an expression matches a refutable pattern using debug assertions.
- matches
- Check if an expression matches a refutable pattern.