[clang-format] square parens with one token are not Objective-C message sends

The commit r322690 introduced support for ObjC detection in header files.
Unfortunately some C headers that use designated initializers are now
incorrectly detected as Objective-C.
This commit fixes it by ensuring that `[ token ]` is not annotated as an
Objective-C message send.

rdar://45504376

Differential Revision: https://reviews.llvm.org/D56226

llvm-svn: 352125

1 files changed, 14 insertions, 0 deletions

diff --git a/clang/unittests/Format/FormatTestObjC.cpp b/clang/unittests/Format/FormatTestObjC.cpp
index 2cb3f9f111e..0d3a5d85bb7 100644
--- a/clang/unittests/Format/FormatTestObjC.cpp
+++ b/clang/unittests/Format/FormatTestObjC.cpp
@@ -165,6 +165,20 @@ TEST(FormatTestObjCStyle, DetectsObjCInHeaders) {
   EXPECT_EQ(FormatStyle::LK_ObjC, Style->Language);
 }
 
+TEST(FormatTestObjCStyle, AvoidDetectingDesignatedInitializersAsObjCInHeaders) {
+  auto Style = getStyle("LLVM", "a.h", "none",
+                        "static const char *names[] = {[0] = \"foo\",\n"
+                        "[kBar] = \"bar\"};");
+  ASSERT_TRUE((bool)Style);
+  EXPECT_EQ(FormatStyle::LK_Cpp, Style->Language);
+
+  Style = getStyle("LLVM", "a.h", "none",
+                   "static const char *names[] = {[0] EQ \"foo\",\n"
+                   "[kBar] EQ \"bar\"};");
+  ASSERT_TRUE((bool)Style);
+  EXPECT_EQ(FormatStyle::LK_Cpp, Style->Language);
+}
+
 TEST_F(FormatTestObjC, FormatObjCTryCatch) {
   verifyFormat("@try {\n"
                "  f();\n"