fn suggest_question_mark<'tcx>(
cx: &LateContext<'tcx>,
adt: AdtDef<'tcx>,
args: &List<GenericArg<'tcx>>,
span: Span
) -> bool
fn suggest_question_mark<'tcx>(
cx: &LateContext<'tcx>,
adt: AdtDef<'tcx>,
args: &List<GenericArg<'tcx>>,
span: Span
) -> bool