[clang-format] Allow `Language: Cpp` for C files (#133033)

Fix #132832

1 files changed, 20 insertions, 0 deletions

diff --git a/clang/unittests/Format/ConfigParseTest.cpp b/clang/unittests/Format/ConfigParseTest.cpp
index cc42642..287191d 100644
--- a/clang/unittests/Format/ConfigParseTest.cpp
+++ b/clang/unittests/Format/ConfigParseTest.cpp
@@ -1230,6 +1230,26 @@ TEST(ConfigParseTest, ParsesConfigurationWithLanguages) {
               IndentWidth, 56u);
 }
 
+TEST(ConfigParseTest, AllowCppForC) {
+  FormatStyle Style = {};
+  Style.Language = FormatStyle::LK_C;
+  EXPECT_EQ(parseConfiguration("Language: Cpp", &Style), ParseError::Success);
+
+  CHECK_PARSE("---\n"
+              "IndentWidth: 4\n"
+              "---\n"
+              "Language: Cpp\n"
+              "IndentWidth: 8\n",
+              IndentWidth, 8u);
+
+  EXPECT_EQ(parseConfiguration("---\n"
+                               "Language: ObjC\n"
+                               "---\n"
+                               "Language: Cpp\n",
+                               &Style),
+            ParseError::Success);
+}
+
 TEST(ConfigParseTest, UsesLanguageForBasedOnStyle) {
   FormatStyle Style = {};
   Style.Language = FormatStyle::LK_JavaScript;