From: Ted Kremenek <kremenek@apple.com>
Date: Thu, 3 Dec 2009 01:34:15 +0000 (+0000)
Subject: Add 'has_feature(cxx_exceptions)' to allow code to determine via preprocessor logic... 
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=7d9bd4257f817494b2fa5b310df05807050a9c18;p=clang

Add 'has_feature(cxx_exceptions)' to allow code to determine via preprocessor logic if C++ exceptions are enabled.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@90378 91177308-0d34-0410-b5e6-96231b3b80d8
---

diff --git a/lib/Lex/PPMacroExpansion.cpp b/lib/Lex/PPMacroExpansion.cpp
index 6181e17e60..25f8b113c3 100644
--- a/lib/Lex/PPMacroExpansion.cpp
+++ b/lib/Lex/PPMacroExpansion.cpp
@@ -488,6 +488,9 @@ static bool HasFeature(const Preprocessor &PP, const IdentifierInfo *II) {
     return false;
   case 8:
     if (II->isStr("cxx_rtti")) return LangOpts.RTTI;
+    return false;
+  case 14:
+    if (II->isStr("cxx_exceptions")) return LangOpts.Exceptions;
     return false;      
   case 19:
     if (II->isStr("objc_nonfragile_abi")) return LangOpts.ObjCNonFragileABI;
diff --git a/test/Lexer/has_feature_exceptions.cpp b/test/Lexer/has_feature_exceptions.cpp
new file mode 100644
index 0000000000..231a6c56a4
--- /dev/null
+++ b/test/Lexer/has_feature_exceptions.cpp
@@ -0,0 +1,11 @@
+// RUN: clang -E -fexceptions %s -o - | FileCheck --check-prefix=CHECK-EXCEPTIONS %s
+// RUN: clang -E -fno-exceptions %s -o - | FileCheck --check-prefix=CHECK-NO-EXCEPTIONS %s
+
+#if __has_feature(cxx_exceptions)
+int foo();
+#else
+int bar();
+#endif
+
+// CHECK-EXCEPTIONS: foo
+// CHECK-NO-EXCEPTIONS: bar