From 28ddb91decff9bb9e28cf12e04b2b6bf78cadc3b Mon Sep 17 00:00:00 2001 From: Richard Smith Date: Wed, 14 Nov 2018 21:04:34 +0000 Subject: [c++20] Implement P0482R6: enable -fchar8_t by default in C++20 mode. This unfortunately results in a substantial breaking change when switching to C++20, but it's not yet clear what / how much we should do about that. We may want to add a compatibility conversion from u8 string literals to const char*, similar to how C++98 provided a compatibility conversion from string literals to non-const char*, but that's not handled by this patch. The feature can be disabled in C++20 mode with -fno-char8_t. llvm-svn: 346892 --- clang/lib/Frontend/CompilerInvocation.cpp | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'clang/lib/Frontend/CompilerInvocation.cpp') diff --git a/clang/lib/Frontend/CompilerInvocation.cpp b/clang/lib/Frontend/CompilerInvocation.cpp index 4a3195c69c3..1ea3df4303d 100644 --- a/clang/lib/Frontend/CompilerInvocation.cpp +++ b/clang/lib/Frontend/CompilerInvocation.cpp @@ -2475,7 +2475,7 @@ static void ParseLangArgs(LangOptions &Opts, ArgList &Args, InputKind IK, Opts.ImplicitModules = !Args.hasArg(OPT_fno_implicit_modules); Opts.CharIsSigned = Opts.OpenCL || !Args.hasArg(OPT_fno_signed_char); Opts.WChar = Opts.CPlusPlus && !Args.hasArg(OPT_fno_wchar); - Opts.Char8 = Args.hasArg(OPT_fchar8__t); + Opts.Char8 = Args.hasFlag(OPT_fchar8__t, OPT_fno_char8__t, Opts.CPlusPlus2a); if (const Arg *A = Args.getLastArg(OPT_fwchar_type_EQ)) { Opts.WCharSize = llvm::StringSwitch(A->getValue()) .Case("char", 1) -- cgit v1.2.3