diff --git a/clang/docs/LibASTMatchersReference.html b/clang/docs/LibASTMatchersReference.html index f18e9cf1341696..ddc99020604c94 100644 --- a/clang/docs/LibASTMatchersReference.html +++ b/clang/docs/LibASTMatchersReference.html @@ -1842,6 +1842,12 @@

Node Matchers

if (x) {} +Matcher<Stmt>dependentScopeDeclRefExprMatcher<DependentScopeDeclRefExpr>... +
Matches expressions that refer to dependent scope declarations.
+
+Example matches T::v
+   template  class X : T { void f() { T::v; } };
+
Matcher<Stmt>declStmtMatcher<DeclStmt>...
Matches declaration statements.
diff --git a/clang/docs/ReleaseNotes.rst b/clang/docs/ReleaseNotes.rst
index 8b984ecaefecaf..2a84a4704f0c21 100644
--- a/clang/docs/ReleaseNotes.rst
+++ b/clang/docs/ReleaseNotes.rst
@@ -1101,6 +1101,8 @@ AST Matchers
 
 - Ensure ``pointee`` matches Objective-C pointer types.
 
+- Add ``dependentScopeDeclRefExpr`` matcher to match expressions that refer to dependent scope declarations.
+
 clang-format
 ------------
 
diff --git a/clang/include/clang/ASTMatchers/ASTMatchers.h b/clang/include/clang/ASTMatchers/ASTMatchers.h
index 897aa25dc95cc1..22e2546ab81e0a 100644
--- a/clang/include/clang/ASTMatchers/ASTMatchers.h
+++ b/clang/include/clang/ASTMatchers/ASTMatchers.h
@@ -2125,6 +2125,16 @@ extern const internal::VariadicDynCastAllOfMatcher expr;
 extern const internal::VariadicDynCastAllOfMatcher
     declRefExpr;
 
+/// Matches expressions that refer to dependent scope declarations.
+///
+/// example matches T::v;
+/// \code
+///  template  class X : T { void f() { T::v; } };
+/// \endcode
+extern const internal::VariadicDynCastAllOfMatcher
+    dependentScopeDeclRefExpr;
+
 /// Matches a reference to an ObjCIvar.
 ///
 /// Example: matches "a" in "init" method:
diff --git a/clang/lib/ASTMatchers/ASTMatchersInternal.cpp b/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
index bf9dc5f2373f9e..8c744eebbdfb50 100644
--- a/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
+++ b/clang/lib/ASTMatchers/ASTMatchersInternal.cpp
@@ -924,6 +924,8 @@ const internal::VariadicDynCastAllOfMatcher
 const internal::VariadicDynCastAllOfMatcher cxxFoldExpr;
 const internal::VariadicDynCastAllOfMatcher expr;
 const internal::VariadicDynCastAllOfMatcher declRefExpr;
+const internal::VariadicDynCastAllOfMatcher
+    dependentScopeDeclRefExpr;
 const internal::VariadicDynCastAllOfMatcher objcIvarRefExpr;
 const internal::VariadicDynCastAllOfMatcher blockExpr;
 const internal::VariadicDynCastAllOfMatcher ifStmt;
diff --git a/clang/lib/ASTMatchers/Dynamic/Registry.cpp b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
index 837633fb2f0601..685d626d2978bf 100644
--- a/clang/lib/ASTMatchers/Dynamic/Registry.cpp
+++ b/clang/lib/ASTMatchers/Dynamic/Registry.cpp
@@ -222,6 +222,7 @@ RegistryMaps::RegistryMaps() {
   REGISTER_MATCHER(decompositionDecl);
   REGISTER_MATCHER(declCountIs);
   REGISTER_MATCHER(declRefExpr);
+  REGISTER_MATCHER(dependentScopeDeclRefExpr);
   REGISTER_MATCHER(declStmt);
   REGISTER_MATCHER(declaratorDecl);
   REGISTER_MATCHER(decltypeType);
diff --git a/clang/unittests/AST/ASTImporterTest.cpp b/clang/unittests/AST/ASTImporterTest.cpp
index f3f314b723dfc6..ec062a5cc953b8 100644
--- a/clang/unittests/AST/ASTImporterTest.cpp
+++ b/clang/unittests/AST/ASTImporterTest.cpp
@@ -3172,9 +3172,6 @@ TEST_P(ImportDecl, ImportFieldOrder) {
              recordDecl(hasFieldOrder({"b", "a"})));
 }
 
-const internal::VariadicDynCastAllOfMatcher
-    dependentScopeDeclRefExpr;
-
 TEST_P(ImportExpr, DependentScopeDeclRefExpr) {
   MatchVerifier Verifier;
   testImport("template  struct S { static T foo; };"
diff --git a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
index 9bc287e07224aa..a3baad367a27b1 100644
--- a/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
+++ b/clang/unittests/ASTMatchers/ASTMatchersNodeTest.cpp
@@ -556,6 +556,21 @@ TEST_P(ASTMatchersTest, DeclRefExpr) {
                          Reference));
 }
 
+TEST_P(ASTMatchersTest, DependentScopeDeclRefExpr) {
+  if (!GetParam().isCXX() || GetParam().hasDelayedTemplateParsing()) {
+    // FIXME: Fix this test to work with delayed template parsing.
+    return;
+  }
+
+  EXPECT_TRUE(matches("template  class X : T { void f() { T::v; } };",
+                      dependentScopeDeclRefExpr()));
+
+  EXPECT_TRUE(
+      matches("template  struct S { static T Foo; };"
+              "template  void declToImport() { (void)S::Foo; }",
+              dependentScopeDeclRefExpr()));
+}
+
 TEST_P(ASTMatchersTest, CXXMemberCallExpr) {
   if (!GetParam().isCXX()) {
     return;
@@ -629,10 +644,8 @@ TEST_P(ASTMatchersTest, MemberExpr_MatchesVariable) {
   EXPECT_TRUE(matches("template "
                       "class X : T { void f() { this->T::v; } };",
                       cxxDependentScopeMemberExpr()));
-  // FIXME: Add a matcher for DependentScopeDeclRefExpr.
-  EXPECT_TRUE(
-      notMatches("template  class X : T { void f() { T::v; } };",
-                 cxxDependentScopeMemberExpr()));
+  EXPECT_TRUE(matches("template  class X : T { void f() { T::v; } };",
+                      dependentScopeDeclRefExpr()));
   EXPECT_TRUE(matches("template  void x() { T t; t.v; }",
                       cxxDependentScopeMemberExpr()));
 }