- Node::Variant(Variant { disr_expr: Some(ref e), .. }) if e.hir_id == hir_id => tcx
- .adt_def(tcx.hir().get_parent_item(hir_id))
- .repr()
- .discr_type()
- .to_ty(tcx),
+ Node::Variant(Variant { disr_expr: Some(ref e), .. }) if e.hir_id == hir_id => {
+ tcx.adt_def(tcx.hir().get_parent_item(hir_id)).repr().discr_type().to_ty(tcx)
+ }
+
+ Node::TypeBinding(
+ binding @ &TypeBinding {
+ hir_id: binding_id,
+ kind: TypeBindingKind::Equality { term: Term::Const(ref e) },
+ ..
+ },
+ ) if let Node::TraitRef(trait_ref) =
+ tcx.hir().get(tcx.hir().get_parent_node(binding_id))
+ && e.hir_id == hir_id =>
+ {
+ let Some(trait_def_id) = trait_ref.trait_def_id() else {
+ return tcx.ty_error_with_message(DUMMY_SP, "Could not find trait");
+ };
+ let assoc_items = tcx.associated_items(trait_def_id);
+ let assoc_item = assoc_items.find_by_name_and_kind(
+ tcx,
+ binding.ident,
+ ty::AssocKind::Const,
+ def_id.to_def_id(),
+ );
+ if let Some(assoc_item) = assoc_item {
+ tcx.type_of(assoc_item.def_id)
+ } else {
+ // FIXME(associated_const_equality): add a useful error message here.
+ tcx.ty_error_with_message(
+ DUMMY_SP,
+ "Could not find associated const on trait",
+ )
+ }
+ }