Add support for -fno-operator-names, patch by Bill.

llvm-svn: 39245

clang/Driver/clang.cpp

@@ -233,6 +233,11 @@ LangStd("std", cl::desc("Language standard to compile for"),
                               "extensions (default for C++)"),
                    clEnumValEnd));
 
+static cl::opt<bool>
+NoOperatorNames("fno-operator-names",
+                cl::desc("Do not treat C++ operator name keywords as "
+                         "synonyms for operators"));
+
 // FIXME: add:
 //   -ansi
 //   -trigraphs
@@ -265,6 +270,7 @@ static void InitializeLanguageStandard(LangOptions &Options) {
   case lang_gnucxx98:
   case lang_cxx98:
     Options.CPlusPlus = 1;
+    Options.CXXOperatorNames = !NoOperatorNames;
     // FALL THROUGH.
   case lang_gnu99:
   case lang_c99:

clang/Lex/IdentifierTable.cpp

@@ -131,7 +131,7 @@ void IdentifierTable::AddKeywords(const LangOptions &LangOpts) {
 #define PPKEYWORD(NAME) \
   AddPPKeyword(tok::pp_##NAME, #NAME, strlen(#NAME), *this);
 #define CXX_KEYWORD_OPERATOR(NAME, ALIAS) \
-  if (LangOpts.CPlusPlus)                 \
+  if (LangOpts.CXXOperatorNames)          \
     AddCXXOperatorKeyword(#NAME, strlen(#NAME), tok::ALIAS, *this);
 #define OBJC1_AT_KEYWORD(NAME) \
   if (LangOpts.ObjC1)          \