1 files changed, 53 insertions, 0 deletions
diff --git a/clang/unittests/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp b/clang/unittests/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp
new file mode 100644
index 00000000000..d0e4fb733e8
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+++ b/clang/unittests/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp
@@ -0,0 +1,53 @@
+//===- unittest/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp -===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "TestVisitor.h"
+
+using namespace clang;
+
+namespace {
+
+// Matches (optional) explicit template parameters.
+class LambdaTemplateParametersVisitor
+  : public ExpectedLocationVisitor<LambdaTemplateParametersVisitor> {
+public:
+  bool shouldVisitImplicitCode() const { return false; }
+
+  bool VisitTemplateTypeParmDecl(TemplateTypeParmDecl *D) {
+    EXPECT_FALSE(D->isImplicit());
+    Match(D->getName(), D->getLocStart());
+    return true;
+  }
+
+  bool VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
+    EXPECT_FALSE(D->isImplicit());
+    Match(D->getName(), D->getLocStart());
+    return true;
+  }
+
+  bool VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
+    EXPECT_FALSE(D->isImplicit());
+    Match(D->getName(), D->getLocStart());
+    return true;
+  }
+};
+
+TEST(RecursiveASTVisitor, VisitsLambdaExplicitTemplateParameters) {
+  LambdaTemplateParametersVisitor Visitor;
+  Visitor.ExpectMatch("T",  2, 15);
+  Visitor.ExpectMatch("I",  2, 24);
+  Visitor.ExpectMatch("TT", 2, 31);
+  EXPECT_TRUE(Visitor.runOver(
+      "void f() { \n"
+      "  auto l = []<class T, int I, template<class> class TT>(auto p) { }; \n"
+      "}",
+      LambdaTemplateParametersVisitor::Lang_CXX2a));
+}
+
+} // end anonymous namespace