Function rustc_pattern_analysis::usefulness::collect_pattern_usefulness

source · 
fn collect_pattern_usefulness<'p, Cx: PatCx>(
    useful_subpatterns: &FxHashSet<PatId>,
    pat: &'p DeconstructedPat<Cx>
) -> Usefulness<'p, Cx>
Expand description

Report whether this pattern was found useful, and its subpatterns that were not useful if any.