Function rustc::hir::pat_util::pat_bindings

pub fn pat_bindings<I>(dm: &RefCell<DefMap>, pat: &Pat, it: I) where I: FnMut(BindingMode, NodeId, Span, &Spanned<Name>)

Unstable (rustc_private)

Call it on every "binding" in a pattern, e.g., on a in match foo() { Some(a) => (), None => () }