[PATCH] Have `__have_extension(cxx_variadic_templates)` return true for any C++ standard.

[Eric Fiselier]

Alphabetize entry in list.


http://reviews.llvm.org/D9423

Files:
  lib/Lex/PPMacroExpansion.cpp
  test/Lexer/has_extension_cxx.cpp

Index: lib/Lex/PPMacroExpansion.cpp
===================================================================
--- lib/Lex/PPMacroExpansion.cpp
+++ lib/Lex/PPMacroExpansion.cpp
@@ -1237,6 +1237,7 @@
            .Case("cxx_range_for", LangOpts.CPlusPlus)
            .Case("cxx_reference_qualified_functions", LangOpts.CPlusPlus)
            .Case("cxx_rvalue_references", LangOpts.CPlusPlus)
+           .Case("cxx_variadic_templates", LangOpts.CPlusPlus)
            // C++1y features supported by other languages as extensions.
            .Case("cxx_binary_literals", true)
            .Case("cxx_init_captures", LangOpts.CPlusPlus11)
Index: test/Lexer/has_extension_cxx.cpp
===================================================================
--- test/Lexer/has_extension_cxx.cpp
+++ test/Lexer/has_extension_cxx.cpp
@@ -41,6 +41,11 @@
 int has_rvalue_references();
 #endif
 
+// CHECK: has_variadic_templates
+#if __has_extension(cxx_variadic_templates)
+int has_variadic_templates();
+#endif
+
 // CHECK: has_local_type_template_args
 #if __has_extension(cxx_local_type_template_args)
 int has_local_type_template_args();

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