{"ast_node_type":"variable","tokens":[{"end":100,"kind":"keyword","start":0,"text":"if"}]}
                    if let Ok(ref binding_place) = self.cat_res(pat.hir_id, pat.span, pat_ty, def) {
                    let def = Res::Local(canonical_id);
                        self.delegate.borrow_mut().bind(binding_place, binding_place.hir_id);