template<class... Args>
string format(format_string<Args...> fmt, Args&&... args);
template<class... Args>
wstring format(wformat_string<Args...> fmt, Args&&... args);
template<class... Args>
string format(const locale& loc, format_string<Args...> fmt, Args&&... args);
template<class... Args>
wstring format(const locale& loc, wformat_string<Args...> fmt, Args&&... args);
string vformat(string_view fmt, format_args args);
wstring vformat(wstring_view fmt, wformat_args args);
string vformat(const locale& loc, string_view fmt, format_args args);
wstring vformat(const locale& loc, wstring_view fmt, wformat_args args);
template<class Out, class... Args>
Out format_to(Out out, format_string<Args...> fmt, Args&&... args);
template<class Out, class... Args>
Out format_to(Out out, wformat_string<Args...> fmt, Args&&... args);
template<class Out, class... Args>
Out format_to(Out out, const locale& loc, format_string<Args...> fmt, Args&&... args);
template<class Out, class... Args>
Out format_to(Out out, const locale& loc, wformat_string<Args...> fmt, Args&&... args);
template<class Out>
Out vformat_to(Out out, string_view fmt, format_args args);
template<class Out>
Out vformat_to(Out out, wstring_view fmt, wformat_args args);
template<class Out>
Out vformat_to(Out out, const locale& loc, string_view fmt, format_args args);
template<class Out>
Out vformat_to(Out out, const locale& loc, wstring_view fmt, wformat_args args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
format_string<Args...> fmt, Args&&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
wformat_string<Args...> fmt, Args&&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
const locale& loc, format_string<Args...> fmt,
Args&&... args);
template<class Out, class... Args>
format_to_n_result<Out> format_to_n(Out out, iter_difference_t<Out> n,
const locale& loc, wformat_string<Args...> fmt,
Args&&... args);
template<class... Args>
size_t formatted_size(format_string<Args...> fmt, Args&&... args);
template<class... Args>
size_t formatted_size(wformat_string<Args...> fmt, Args&&... args);
template<class... Args>
size_t formatted_size(const locale& loc, format_string<Args...> fmt, Args&&... args);
template<class... Args>
size_t formatted_size(const locale& loc, wformat_string<Args...> fmt, Args&&... args);