Add -std=c++1y argument, for *highly* experimental C++14 support.

llvm-svn: 166139

clang/lib/Frontend/CompilerInvocation.cpp

@@ -1839,6 +1839,7 @@ void CompilerInvocation::setLangDefaults(LangOptions &Opts, InputKind IK,
   Opts.C11 = Std.isC11();
   Opts.CPlusPlus = Std.isCPlusPlus();
   Opts.CPlusPlus0x = Std.isCPlusPlus0x();
+  Opts.CPlusPlus1y = Std.isCPlusPlus1y();
   Opts.Digraphs = Std.hasDigraphs();
   Opts.GNUMode = Std.isGNUMode();
   Opts.GNUInline = !Std.isC99();