[clangd] Navigation from definition of template specialization to primary template

Fixes https://github.com/clangd/clangd/issues/212.

Reviewers: sammccall

Subscribers: ilya-biryukov, MaskRay, jkorous, arphaman, kadircet, usaxena95, cfe-commits

Tags: #clang

Differential Revision: https://reviews.llvm.org/D71090

1 files changed, 16 insertions, 1 deletions

diff --git a/clang-tools-extra/clangd/unittests/XRefsTests.cpp b/clang-tools-extra/clangd/unittests/XRefsTests.cpp
index b6115065d1b..ee23522d109 100644
--- a/clang-tools-extra/clangd/unittests/XRefsTests.cpp
+++ b/clang-tools-extra/clangd/unittests/XRefsTests.cpp
@@ -450,7 +450,22 @@ TEST(LocateSymbol, All) {
           +^+x;
         }
       )cpp",
-  };
+
+      R"cpp(// Declaration of explicit template specialization
+        template <typename T>
+        struct $decl[[Foo]] {};
+
+        template <>
+        struct Fo^o<int> {};
+      )cpp",
+
+      R"cpp(// Declaration of partial template specialization
+        template <typename T>
+        struct $decl[[Foo]] {};
+
+        template <typename T>
+        struct Fo^o<T*> {};
+      )cpp"};
   for (const char *Test : Tests) {
     Annotations T(Test);
     llvm::Optional<Range> WantDecl;