Add TyKind::TyAlias support in librustdoc

Author: GuillaumeGomez

src/librustdoc/clean/inline.rs

@@ -297,7 +297,7 @@ fn build_union(cx: &mut DocContext<'_>, did: DefId) -> clean::Union {
     clean::Union { generics, fields }
 }
 
-fn build_type_alias(cx: &mut DocContext<'_>, did: DefId) -> Box<clean::Typedef> {
+pub(crate) fn build_type_alias(cx: &mut DocContext<'_>, did: DefId) -> Box<clean::Typedef> {
     let predicates = cx.tcx.explicit_predicates_of(did);
     let type_ = clean_middle_ty(cx.tcx.type_of(did), cx, Some(did));
 

src/librustdoc/clean/mod.rs

@@ -1733,6 +1733,11 @@ pub(crate) fn clean_middle_ty<'tcx>(
             clean_middle_opaque_bounds(cx, bounds)
         }
 
+        ty::TyAlias(def_id, substs) => {
+            let path = external_path(cx, def_id, false, ThinVec::new(), substs);
+            Type::Path { path }
+        }
+
         ty::Closure(..) => panic!("Closure"),
         ty::Generator(..) => panic!("Generator"),
         ty::Bound(..) => panic!("Bound"),

src/librustdoc/passes/collect_intra_doc_links.rs

@@ -537,6 +537,7 @@ impl<'a, 'tcx> LinkCollector<'a, 'tcx> {
             ty::Adt(ty::AdtDef(Interned(&ty::AdtDefData { did, .. }, _)), _) | ty::Foreign(did) => {
                 Res::from_def_id(self.cx.tcx, did)
             }
+            ty::TyAlias(def_id, _) => Res::Def(self.cx.tcx.def_kind(def_id), def_id),
             ty::Projection(_)
             | ty::Closure(..)
             | ty::Generator(..)