https://gcc.gnu.org/bugzilla/show_bug.cgi?id=59867
--- Comment #13 from Ed Smith-Rowland <3dw4rd at verizon dot net> --- Created attachment 33020 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=33020&action=edit Patch 58781, 59867, 60249, ... I think I got it. Don't mess with the token stream. PR C++/58781 - Unicode strings broken in a strange way PR C++/59867 - Template string literal loses first symbol PR C++/60249 - Compiler goes into semi-infinite loop with wrong usage of user defined string literals Plus I fixed an misleading error message for string literal operator templates (not available in C++11).