Function generic_context

include/fmt/format.h:3870–3873

  enum { builtin_types = FMT_BUILTIN_TYPES };

  constexpr generic_context(OutputIt out,
                            basic_format_args<generic_context> args,
                            locale_ref loc = {})
      : out_(out), args_(args), loc_(loc) {}
  generic_context(generic_context&&) = default;
  generic_context(const generic_context&) = delete;
  void operator=(const generic_context&) = delete;