// Formatting library for C++ - optional wchar_t and exotic character support // // Copyright (c) 2012 - present, Victor Zverovich // All rights reserved. // // For the license information refer to format.h. #ifndef FMT_XCHAR_H_ #define FMT_XCHAR_H_ #include <cwchar> #include <tuple> #include "format.h" FMT_BEGIN_NAMESPACE namespace detail { template <typename T> using is_exotic_char = bool_constant<!std::is_same<T, char>::value>; } FMT_MODULE_EXPORT_BEGIN using wstring_view = basic_string_view<wchar_t>; using wformat_parse_context = basic_format_parse_context<wchar_t>; using wformat_context = buffer_context<wchar_t>; using wformat_args = basic_format_args<wformat_context>; using wmemory_buffer = basic_memory_buffer<wchar_t>; #if FMT_GCC_VERSION && FMT_GCC_VERSION < 409 // Workaround broken conversion on older gcc. template <typename... Args> using wformat_string = wstring_view; #else template <typename... Args> using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>; #endif template <> struct is_char<wchar_t> : std::true_type {}; template <> struct is_char<detail::char8_type> : std::true_type {}; template <> struct is_char<char16_t> : std::true_type {}; template <> struct is_char<char32_t> : std::true_type {}; template <typename... Args> constexpr format_arg_store<wformat_context, Args...> make_wformat_args( const Args&... args) { return {args...}; } inline namespace literals { constexpr auto operator"" _format(const wchar_t* s, size_t n) -> detail::udl_formatter<wchar_t> { return {{s, n}}; } #if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_PARAMETERS constexpr detail::udl_arg<wchar_t> operator"" _a(const wchar_t* s, size_t) { return {s}; } #endif } // namespace literals template <typename It, typename Sentinel> auto join(It begin, Sentinel end, wstring_view sep) -> join_view<It, Sentinel, wchar_t> { return {begin, end, sep}; } template <typename Range> auto join(Range&& range, wstring_view sep) -> join_view<detail::iterator_t<Range>, detail::sentinel_t<Range>, wchar_t> { return join(std::begin(range), std::end(range), sep); } template <typename T> auto join(std::initializer_list<T> list, wstring_view sep) -> join_view<const T*, const T*, wchar_t> { return join(std::begin(list), std::end(list), sep); } template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)> auto vformat(basic_string_view<Char> format_str, basic_format_args<buffer_context<type_identity_t<Char>>> args) -> std::basic_string<Char> { basic_memory_buffer<Char> buffer; detail::vformat_to(buffer, format_str, args); return to_string(buffer); } // Pass char_t as a default template parameter instead of using // std::basic_string<char_t<S>> to reduce the symbol size. template <typename S, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(!std::is_same<Char, char>::value)> auto format(const S& format_str, Args&&... args) -> std::basic_string<Char> { const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...); return vformat(to_string_view(format_str), vargs); } template <typename Locale, typename S, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value)> inline auto vformat( const Locale& loc, const S& format_str, basic_format_args<buffer_context<type_identity_t<Char>>> args) -> std::basic_string<Char> { return detail::vformat(loc, to_string_view(format_str), args); } template <typename Locale, typename S, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value)> inline auto format(const Locale& loc, const S& format_str, Args&&... args) -> std::basic_string<Char> { return detail::vformat(loc, to_string_view(format_str), fmt::make_args_checked<Args...>(format_str, args...)); } template <typename OutputIt, typename S, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&& detail::is_exotic_char<Char>::value)> auto vformat_to(OutputIt out, const S& format_str, basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt { auto&& buf = detail::get_buffer<Char>(out); detail::vformat_to(buf, to_string_view(format_str), args); return detail::get_iterator(buf); } template <typename OutputIt, typename S, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&& detail::is_exotic_char<Char>::value)> inline auto format_to(OutputIt out, const S& fmt, Args&&... args) -> OutputIt { const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...); return vformat_to(out, to_string_view(fmt), vargs); } template <typename S, typename... Args, typename Char, size_t SIZE, typename Allocator, FMT_ENABLE_IF(detail::is_string<S>::value)> FMT_DEPRECATED auto format_to(basic_memory_buffer<Char, SIZE, Allocator>& buf, const S& format_str, Args&&... args) -> typename buffer_context<Char>::iterator { const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...); detail::vformat_to(buf, to_string_view(format_str), vargs, {}); return detail::buffer_appender<Char>(buf); } template <typename Locale, typename S, typename OutputIt, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&& detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value)> inline auto vformat_to( OutputIt out, const Locale& loc, const S& format_str, basic_format_args<buffer_context<type_identity_t<Char>>> args) -> OutputIt { auto&& buf = detail::get_buffer<Char>(out); vformat_to(buf, to_string_view(format_str), args, detail::locale_ref(loc)); return detail::get_iterator(buf); } template < typename OutputIt, typename Locale, typename S, typename... Args, typename Char = char_t<S>, bool enable = detail::is_output_iterator<OutputIt, Char>::value&& detail::is_locale<Locale>::value&& detail::is_exotic_char<Char>::value> inline auto format_to(OutputIt out, const Locale& loc, const S& format_str, Args&&... args) -> typename std::enable_if<enable, OutputIt>::type { const auto& vargs = fmt::make_args_checked<Args...>(format_str, args...); return vformat_to(out, loc, to_string_view(format_str), vargs); } template <typename OutputIt, typename Char, typename... Args, FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&& detail::is_exotic_char<Char>::value)> inline auto vformat_to_n( OutputIt out, size_t n, basic_string_view<Char> format_str, basic_format_args<buffer_context<type_identity_t<Char>>> args) -> format_to_n_result<OutputIt> { detail::iterator_buffer<OutputIt, Char, detail::fixed_buffer_traits> buf(out, n); detail::vformat_to(buf, format_str, args); return {buf.out(), buf.count()}; } template <typename OutputIt, typename S, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value&& detail::is_exotic_char<Char>::value)> inline auto format_to_n(OutputIt out, size_t n, const S& fmt, const Args&... args) -> format_to_n_result<OutputIt> { const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...); return vformat_to_n(out, n, to_string_view(fmt), vargs); } template <typename S, typename... Args, typename Char = char_t<S>, FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)> inline auto formatted_size(const S& fmt, Args&&... args) -> size_t { detail::counting_buffer<Char> buf; const auto& vargs = fmt::make_args_checked<Args...>(fmt, args...); detail::vformat_to(buf, to_string_view(fmt), vargs); return buf.count(); } inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) { wmemory_buffer buffer; detail::vformat_to(buffer, fmt, args); buffer.push_back(L'\0'); if (std::fputws(buffer.data(), f) == -1) FMT_THROW(system_error(errno, FMT_STRING("cannot write to file"))); } inline void vprint(wstring_view fmt, wformat_args args) { vprint(stdout, fmt, args); } template <typename... T> void print(std::FILE* f, wformat_string<T...> fmt, T&&... args) { return vprint(f, wstring_view(fmt), fmt::make_wformat_args(args...)); } template <typename... T> void print(wformat_string<T...> fmt, T&&... args) { return vprint(wstring_view(fmt), fmt::make_wformat_args(args...)); } /** Converts *value* to ``std::wstring`` using the default format for type *T*. */ template <typename T> inline auto to_wstring(const T& value) -> std::wstring { return format(FMT_STRING(L"{}"), value); } FMT_MODULE_EXPORT_END FMT_END_NAMESPACE #endif // FMT_XCHAR_H_