[PATCH] D87225: [clangd] When finding refs for a template specialization, do not return refs to other specializations

[Nathan Ridge via Phabricator via cfe-commits]

nridge updated this revision to Diff 293047.
nridge added a comment.

Take a different fix approach, as suggested in the issue discussion


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D87225/new/

https://reviews.llvm.org/D87225

Files:
  clang-tools-extra/clangd/XRefs.cpp
  clang-tools-extra/clangd/unittests/XRefsTests.cpp


Index: clang-tools-extra/clangd/unittests/XRefsTests.cpp
===================================================================
--- clang-tools-extra/clangd/unittests/XRefsTests.cpp
+++ clang-tools-extra/clangd/unittests/XRefsTests.cpp
@@ -1582,6 +1582,13 @@
           f.[[^~]]Foo();
         }
       )cpp",
+      R"cpp(// Renaming alias
+        template <typename> class Vector {};
+        using [[^X]] = Vector<int>;
+        [[X]] x1;
+        Vector<int> x2;
+        Vector<double> y;
+      )cpp",
   };
   for (const char *Test : Tests) {
     Annotations T(Test);
Index: clang-tools-extra/clangd/XRefs.cpp
===================================================================
--- clang-tools-extra/clangd/XRefs.cpp
+++ clang-tools-extra/clangd/XRefs.cpp
@@ -1140,11 +1140,18 @@
   } else {
     // Handle references to Decls.
 
-    // We also show references to the targets of using-decls, so we include
-    // DeclRelation::Underlying.
-    DeclRelationSet Relations = DeclRelation::TemplatePattern |
-                                DeclRelation::Alias | DeclRelation::Underlying;
+    DeclRelationSet Relations =
+        DeclRelation::TemplatePattern | DeclRelation::Alias;
     auto Decls = getDeclAtPosition(AST, *CurLoc, Relations);
+    // If the results include a *non-renaming* alias, get its
+    // underlying decls as well. (See similar logic in locateASTReferent()).
+    for (const NamedDecl *D : Decls) {
+      if (llvm::isa<UsingDecl>(D) || llvm::isa<UnresolvedUsingValueDecl>(D)) {
+        Decls = getDeclAtPosition(AST, *CurLoc,
+                                  Relations | DeclRelation::Underlying);
+        break;
+      }
+    }
 
     // We traverse the AST to find references in the main file.
     auto MainFileRefs = findRefs(Decls, AST);


-------------- next part --------------
A non-text attachment was scrubbed...
Name: D87225.293047.patch
Type: text/x-patch
Size: 1780 bytes
Desc: not available
URL: <http://lists.llvm.org/pipermail/cfe-commits/attachments/20200921/f16f0bc2/attachment.bin>