Compile time format limited to char

[XZiar]

I don't know why FMT_STRING is limited to use char only since fmt itself support both char and wchar_t. Is it designed to be that?

There several pieces of code hard coded the char_type:

fmt/include/fmt/format.h

Line 1257 in 3e75ad9

format_string_traits_base<char> {};

fmt/include/fmt/format.h

Lines 2273 to 2274 in 3e75ad9

	internal::check_format_string<char, internal::error_handler, Args...>(
	string_view(format_str.data(), format_str.size()));

fmt/include/fmt/format.h

Lines 3684 to 3685 in 3e75ad9

	static FMT_CONSTEXPR size_t size() { return sizeof(s); } \
	explicit operator fmt::string_view() const { return s; } \

It is easy to solve this problem by adding typedef of char_type in the struct S.

[vitaut]

Is it designed to be that?

No, just noone generalized it yet. It is indeed easy to solve and PRs are welcome.