2 files changed, 57 insertions, 0 deletions
diff --git a/clang/unittests/Basic/CMakeLists.txt b/clang/unittests/Basic/CMakeLists.txt
index 8c8baa5..f20c8db 100644
--- a/clang/unittests/Basic/CMakeLists.txt
+++ b/clang/unittests/Basic/CMakeLists.txt
@@ -6,6 +6,7 @@ add_distinct_clang_unittest(BasicTests
   DiagnosticTest.cpp
   FileEntryTest.cpp
   FileManagerTest.cpp
+  LangOptionsTest.cpp
   LineOffsetMappingTest.cpp
   OffloadArchTest.cpp
   SanitizersTest.cpp
diff --git a/clang/unittests/Basic/LangOptionsTest.cpp b/clang/unittests/Basic/LangOptionsTest.cpp
new file mode 100644
index 0000000..0d7d5ec
--- /dev/null
+++ b/clang/unittests/Basic/LangOptionsTest.cpp
@@ -0,0 +1,56 @@
+//===- unittests/Basic/LangOptionsTest.cpp --------------------------------===//
+//
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+//
+//===----------------------------------------------------------------------===//
+
+#include "clang/Basic/LangOptions.h"
+#include "gtest/gtest.h"
+
+using namespace llvm;
+using namespace clang;
+
+namespace {
+TEST(LangOptsTest, CStdLang) {
+  LangOptions opts;
+  EXPECT_FALSE(opts.getCLangStd());
+  opts.GNUMode = 0;
+  opts.Digraphs = 1;
+  EXPECT_EQ(opts.getCLangStd(), 199409);
+  opts.C99 = 1;
+  EXPECT_EQ(opts.getCLangStd(), 199901);
+  opts.C11 = 1;
+  EXPECT_EQ(opts.getCLangStd(), 201112);
+  opts.C17 = 1;
+  EXPECT_EQ(opts.getCLangStd(), 201710);
+  opts.C23 = 1;
+  EXPECT_EQ(opts.getCLangStd(), 202311);
+  opts.C2y = 1;
+  EXPECT_EQ(opts.getCLangStd(), 202400);
+
+  EXPECT_FALSE(opts.getCPlusPlusLangStd());
+}
+
+TEST(LangOptsTest, CppStdLang) {
+  LangOptions opts;
+  EXPECT_FALSE(opts.getCPlusPlusLangStd());
+  opts.CPlusPlus = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 199711);
+  opts.CPlusPlus11 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 201103);
+  opts.CPlusPlus14 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 201402);
+  opts.CPlusPlus17 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 201703);
+  opts.CPlusPlus20 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 202002);
+  opts.CPlusPlus23 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 202302);
+  opts.CPlusPlus26 = 1;
+  EXPECT_EQ(opts.getCPlusPlusLangStd(), 202400);
+
+  EXPECT_FALSE(opts.getCLangStd());
+}
+} // namespace