use rustc_errors::struct_span_err;
-use rustc_hir as hir;
-use rustc_hir::itemlikevisit::ItemLikeVisitor;
use rustc_middle::ty::TyCtxt;
use rustc_span::symbol::sym;
pub fn test_variance(tcx: TyCtxt<'_>) {
- tcx.hir().visit_all_item_likes(&mut VarianceTest { tcx });
-}
-
-struct VarianceTest<'tcx> {
- tcx: TyCtxt<'tcx>,
-}
-
-impl<'tcx> ItemLikeVisitor<'tcx> for VarianceTest<'tcx> {
- fn visit_item(&mut self, item: &'tcx hir::Item<'tcx>) {
- // For unit testing: check for a special "rustc_variance"
- // attribute and report an error with various results if found.
- if self.tcx.has_attr(item.def_id.to_def_id(), sym::rustc_variance) {
- let variances_of = self.tcx.variances_of(item.def_id);
- struct_span_err!(self.tcx.sess, item.span, E0208, "{:?}", variances_of).emit();
+ // For unit testing: check for a special "rustc_variance"
+ // attribute and report an error with various results if found.
+ for id in tcx.hir().items() {
+ if tcx.has_attr(id.def_id.to_def_id(), sym::rustc_variance) {
+ let variances_of = tcx.variances_of(id.def_id);
+ struct_span_err!(tcx.sess, tcx.def_span(id.def_id), E0208, "{:?}", variances_of).emit();
}
}
-
- fn visit_trait_item(&mut self, _: &'tcx hir::TraitItem<'tcx>) {}
- fn visit_impl_item(&mut self, _: &'tcx hir::ImplItem<'tcx>) {}
- fn visit_foreign_item(&mut self, _: &'tcx hir::ForeignItem<'tcx>) {}
}