Expose or extract useful utilities?

[netheril96]

This library contains more than the awesome formatting capabilities. It also has UTF8 to UTF16 conversion, cross platform strerror_r, detection of compiler features, etc. Can you expose them as public functions? Or extract them into a separate library?

[vitaut]

Thanks for the feedback.

System error API is already public: http://fmtlib.net/latest/api.html#system-errors. I don't think it's a good idea to expose strerror_r-like API because it requires awkward buffer management. Does the system error API work for you or are you looking for something else?

I'll be happy to make UTF-8/UTF-16 converters public, but note that they are only implemented for Windows, because other platforms support UTF-8 natively. The converters need to be documented first though.

[netheril96]

I have my own exception hierarchy so I don't want to construct a fmt::SystemError. strerror_r is indeed awkward, so an better API would be just std::string fmt::system_errmsg(int). Or with some better name.

[vitaut]

format_system_error is in the public API as of 9c78098.

[netheril96]

Thanks!