1 use rustc_errors::struct_span_err;
3 use rustc_hir::itemlikevisit::ItemLikeVisitor;
4 use rustc_middle::ty::TyCtxt;
5 use rustc_span::symbol::sym;
7 pub fn test_inferred_outlives(tcx: TyCtxt<'_>) {
8 tcx.hir().visit_all_item_likes(&mut OutlivesTest { tcx });
11 struct OutlivesTest<'tcx> {
15 impl<'tcx> ItemLikeVisitor<'tcx> for OutlivesTest<'tcx> {
16 fn visit_item(&mut self, item: &'tcx hir::Item<'tcx>) {
17 // For unit testing: check for a special "rustc_outlives"
18 // attribute and report an error with various results if found.
19 if self.tcx.has_attr(item.def_id.to_def_id(), sym::rustc_outlives) {
20 let inferred_outlives_of = self.tcx.inferred_outlives_of(item.def_id);
21 struct_span_err!(self.tcx.sess, item.span, E0640, "{:?}", inferred_outlives_of).emit();
25 fn visit_trait_item(&mut self, _: &'tcx hir::TraitItem<'tcx>) {}
26 fn visit_impl_item(&mut self, _: &'tcx hir::ImplItem<'tcx>) {}
27 fn visit_foreign_item(&mut self, _: &'tcx hir::ForeignItem<'tcx>) {}