+// 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_
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