Static rustc_lint::builtin::UNREACHABLE_PATTERNS
source · pub static UNREACHABLE_PATTERNS: &'static Lint
Expand description
The unreachable_patterns
lint detects unreachable patterns.
Example
let x = 5;
match x {
y => (),
5 => (),
}
{{produces}}
Explanation
This usually indicates a mistake in how the patterns are specified or
ordered. In this example, the y
pattern will always match, so the
five is impossible to reach. Remember, match arms match in order, you
probably wanted to put the 5
case above the y
case.