Regression in Clang (r346892) with C++2a

[christinaa]

The problem is here:

enum char8_t : unsigned char {};

LLVM/Clang revision 346892 makes char8_t a fundamental type in C++2a mode. Would it be possible to introduce a workaround in fmtlib to account for that? I could do a PR myself but I'm not sure what the best way of approaching it is.

Thank you.

[christinaa]

Quick and dirty fix:

#if !defined(__cpp_char8_t)
// A UTF-8 code unit type.
enum char8_t : unsigned char {};
#endif