pub trait Matcher<T> {
// Required method
fn matches(&self, actual: &T) -> bool;
// Provided method
fn required_matches(&self, actual: Option<&T>) -> bool { ... }
}Expand description
Common pattern to define a matcher for a metadata input T.
Used in matching engines like filtering and routing rules.
Required Methods§
Provided Methods§
Sourcefn required_matches(&self, actual: Option<&T>) -> bool
fn required_matches(&self, actual: Option<&T>) -> bool
Returns whether the provided value is set and matches.
Dyn Compatibility§
This trait is dyn compatible.
In older versions of Rust, dyn compatibility was called "object safety".
Implementations on Foreign Types§
Source§impl<T, O> Matcher<T> for Option<O>where
O: Matcher<T>,
Implement Matcher for optional matchers, so that if a matcher is left
unspecified, it matches all inputs by default.
impl<T, O> Matcher<T> for Option<O>where
O: Matcher<T>,
Implement Matcher for optional matchers, so that if a matcher is left
unspecified, it matches all inputs by default.