1 files changed, 19 insertions, 0 deletions
diff --git a/clang-tools-extra/clangd/unittests/CompileCommandsTests.cpp b/clang-tools-extra/clangd/unittests/CompileCommandsTests.cpp
index 2ce2975..660540a 100644
--- a/clang-tools-extra/clangd/unittests/CompileCommandsTests.cpp
+++ b/clang-tools-extra/clangd/unittests/CompileCommandsTests.cpp
@@ -526,6 +526,25 @@ TEST(CommandMangler, RespectsOriginalSysroot) {
                 Not(HasSubstr(testPath("fake/sysroot"))));
   }
 }
+
+TEST(CommandMangler, StdLatestFlag) {
+  const auto Mangler = CommandMangler::forTests();
+  tooling::CompileCommand Cmd;
+  Cmd.CommandLine = {"clang-cl", "/std:c++latest", "--", "/Users/foo.cc"};
+  Mangler(Cmd, "/Users/foo.cc");
+  // Check that the /std:c++latest flag is not dropped
+  EXPECT_THAT(llvm::join(Cmd.CommandLine, " "), HasSubstr("/std:c++latest"));
+}
+
+TEST(CommandMangler, StdLatestFlag_Inference) {
+  const auto Mangler = CommandMangler::forTests();
+  tooling::CompileCommand Cmd;
+  Cmd.CommandLine = {"clang-cl", "/std:c++latest", "--", "/Users/foo.cc"};
+  Mangler(Cmd, "/Users/foo.hpp");
+  // Check that the /std:c++latest flag is not dropped during inference
+  EXPECT_THAT(llvm::join(Cmd.CommandLine, " "), HasSubstr("/std:c++latest"));
+}
+
 } // namespace
 } // namespace clangd
 } // namespace clang