Importing rustc-1.38.0
diff --git a/src/llvm-project/clang/unittests/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp b/src/llvm-project/clang/unittests/Tooling/RecursiveASTVisitorTests/LambdaTemplateParams.cpp
new file mode 100644
index 0000000..34b38f6
--- /dev/null
+++ b/src/llvm-project/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->getBeginLoc());
+ return true;
+ }
+
+ bool VisitNonTypeTemplateParmDecl(NonTypeTemplateParmDecl *D) {
+ EXPECT_FALSE(D->isImplicit());
+ Match(D->getName(), D->getBeginLoc());
+ return true;
+ }
+
+ bool VisitTemplateTemplateParmDecl(TemplateTemplateParmDecl *D) {
+ EXPECT_FALSE(D->isImplicit());
+ Match(D->getName(), D->getBeginLoc());
+ 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
