syntax_data: {"ast_node_type":"other","tokens":[{"end":70,"kind":"keyword","start":0,"text":"//"}]}
source_snippet:         // if we are only looking for "constrained" region, we have to
context_before:     fn visit_const(&mut self, c: ty::Const<'tcx>) {
context_after:         // ignore the inputs of an unevaluated const, as they may not appear