It doesn't seem to be possible to declare a funciton that can take compiled format string as an argument without referencing fmt::detail

[SwooshyCueb]

Writing a function that can take a regular format string as an argument is pretty straightforward:
https://github.com/SwooshyCueb/irods/blob/5ceb3b6b99b19478ebb9f1681d3432f1e037472d/server/core/include/irods/notify_service_manager.hpp#L46-L70

However, I can't figure out how to declare an overload that can take a compiled format string without dipping into fmt::detail:
https://github.com/SwooshyCueb/irods/blob/5ceb3b6b99b19478ebb9f1681d3432f1e037472d/server/core/include/irods/notify_service_manager.hpp#L72-L99

There doesn't seem to be any documentation on how this might be done. Is this the proper solution?

[madscientist]

I don't know if this is exactly the best way, but this is how I do it. For a variadic function that takes a format string plus arguments:

    template <typename... Args>
    void fmt(fmt::format_string<Args...> fmt, Args&&... args)
    { vfmt(fmt, fmt::make_format_args(args...)); }

then to define the vfmt() method that accepts an already-compiled set of stuff it's just:

    void vfmt(fmt::string_view fmt, fmt::format_args args) { auto msg = fmt::vformat(fmt, args); }

Is that helpful?

[SwooshyCueb]

That doesn't seem to work: https://godbolt.org/z/cze1sv1qf

[vitaut]

You are right that this relies on the internal APIs at the moment. A PR to move is_compiled_string to the public API would be welcome.