blame: source/misc/embedded_libs/fmt-11.0.2/include/fmt/xchar.h

// 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 "color.h"

#include "format.h"

#include "ranges.h"

#ifndef FMT_MODULE

#  include <cwchar>

#  if !defined(FMT_STATIC_THOUSANDS_SEPARATOR)

#    include <locale>

#  endif

#endif

FMT_BEGIN_NAMESPACE

namespace detail {

template <typename T>

using is_exotic_char = bool_constant<!std::is_same<T, char>::value>;

template <typename S, typename = void> struct format_string_char {};

template <typename S>

struct format_string_char<

    S, void_t<decltype(sizeof(detail::to_string_view(std::declval<S>())))>> {

  using type = char_t<S>;

};

template <typename S>

struct format_string_char<S, enable_if_t<is_compile_string<S>::value>> {

  using type = typename S::char_type;

};

template <typename S>

using format_string_char_t = typename format_string_char<S>::type;

inline auto write_loc(basic_appender<wchar_t> out, loc_value value,

                      const format_specs& specs, locale_ref loc) -> bool {

#ifndef FMT_STATIC_THOUSANDS_SEPARATOR

  auto& numpunct =

      std::use_facet<std::numpunct<wchar_t>>(loc.get<std::locale>());

  auto separator = std::wstring();

  auto grouping = numpunct.grouping();

  if (!grouping.empty()) separator = std::wstring(1, numpunct.thousands_sep());

  return value.visit(loc_writer<wchar_t>{out, specs, separator, grouping, {}});

#endif

  return false;

}

}  // namespace detail

FMT_BEGIN_EXPORT

using wstring_view = basic_string_view<wchar_t>;

using wformat_parse_context = basic_format_parse_context<wchar_t>;

using wformat_context = buffered_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;

inline auto runtime(wstring_view s) -> wstring_view { return s; }

#else

template <typename... Args>

using wformat_string = basic_format_string<wchar_t, type_identity_t<Args>...>;

inline auto runtime(wstring_view s) -> runtime_format_string<wchar_t> {

  return {{s}};

}

#endif

template <> struct is_char<wchar_t> : std::true_type {};

template <> struct is_char<char16_t> : std::true_type {};

template <> struct is_char<char32_t> : std::true_type {};

#ifdef __cpp_char8_t

template <>

struct is_char<char8_t> : bool_constant<detail::is_utf8_enabled()> {};

#endif

template <typename... T>

constexpr auto make_wformat_args(T&... args)

    -> decltype(fmt::make_format_args<wformat_context>(args...)) {

  return fmt::make_format_args<wformat_context>(args...);

}

inline namespace literals {

#if FMT_USE_USER_DEFINED_LITERALS && !FMT_USE_NONTYPE_TEMPLATE_ARGS

constexpr auto operator""_a(const wchar_t* s, size_t)

    -> detail::udl_arg<wchar_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... T>

auto join(const std::tuple<T...>& tuple, basic_string_view<wchar_t> sep)

    -> tuple_join_view<wchar_t, T...> {

  return {tuple, sep};

}

template <typename Char, FMT_ENABLE_IF(!std::is_same<Char, char>::value)>

auto vformat(basic_string_view<Char> format_str,

             typename detail::vformat_args<Char>::type args)

    -> std::basic_string<Char> {

  auto buf = basic_memory_buffer<Char>();

  detail::vformat_to(buf, format_str, args);

  return to_string(buf);

}

template <typename... T>

auto format(wformat_string<T...> fmt, T&&... args) -> std::wstring {

  return vformat(fmt::wstring_view(fmt), fmt::make_wformat_args(args...));

}

template <typename OutputIt, typename... T>

auto format_to(OutputIt out, wformat_string<T...> fmt, T&&... args)

    -> OutputIt {

  return vformat_to(out, fmt::wstring_view(fmt),

                    fmt::make_wformat_args(args...));

}

// 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... T,

          typename Char = detail::format_string_char_t<S>,

          FMT_ENABLE_IF(!std::is_same<Char, char>::value &&

                        !std::is_same<Char, wchar_t>::value)>

auto format(const S& format_str, T&&... args) -> std::basic_string<Char> {

  return vformat(detail::to_string_view(format_str),

                 fmt::make_format_args<buffered_context<Char>>(args...));

}

template <typename Locale, typename S,

          typename Char = detail::format_string_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,

                    typename detail::vformat_args<Char>::type args)

    -> std::basic_string<Char> {

  return detail::vformat(loc, detail::to_string_view(format_str), args);

}

template <typename Locale, typename S, typename... T,

          typename Char = detail::format_string_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, T&&... args)

    -> std::basic_string<Char> {

  return detail::vformat(

      loc, detail::to_string_view(format_str),

      fmt::make_format_args<buffered_context<Char>>(args...));

}

template <typename OutputIt, typename S,

          typename Char = detail::format_string_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,

                typename detail::vformat_args<Char>::type args) -> OutputIt {

  auto&& buf = detail::get_buffer<Char>(out);

  detail::vformat_to(buf, detail::to_string_view(format_str), args);

  return detail::get_iterator(buf, out);

}

template <typename OutputIt, typename S, typename... T,

          typename Char = detail::format_string_char_t<S>,

          FMT_ENABLE_IF(detail::is_output_iterator<OutputIt, Char>::value &&

                        !std::is_same<Char, char>::value &&

                        !std::is_same<Char, wchar_t>::value)>

inline auto format_to(OutputIt out, const S& fmt, T&&... args) -> OutputIt {

  return vformat_to(out, detail::to_string_view(fmt),

                    fmt::make_format_args<buffered_context<Char>>(args...));

}

template <typename Locale, typename S, typename OutputIt, typename... Args,

          typename Char = detail::format_string_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,

                       typename detail::vformat_args<Char>::type args)

    -> OutputIt {

  auto&& buf = detail::get_buffer<Char>(out);

  vformat_to(buf, detail::to_string_view(format_str), args,

             detail::locale_ref(loc));

  return detail::get_iterator(buf, out);

}

template <typename OutputIt, typename Locale, typename S, typename... T,

          typename Char = detail::format_string_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,

                      T&&... args) ->

    typename std::enable_if<enable, OutputIt>::type {

  return vformat_to(out, loc, detail::to_string_view(format_str),

                    fmt::make_format_args<buffered_context<Char>>(args...));

}

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,

                         typename detail::vformat_args<Char>::type args)

    -> format_to_n_result<OutputIt> {

  using traits = detail::fixed_buffer_traits;

  auto buf = detail::iterator_buffer<OutputIt, Char, traits>(out, n);

  detail::vformat_to(buf, format_str, args);

  return {buf.out(), buf.count()};

}

template <typename OutputIt, typename S, typename... T,

          typename Char = detail::format_string_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, T&&... args)

    -> format_to_n_result<OutputIt> {

  return vformat_to_n(out, n, fmt::basic_string_view<Char>(fmt),

                      fmt::make_format_args<buffered_context<Char>>(args...));

}

template <typename S, typename... T,

          typename Char = detail::format_string_char_t<S>,

          FMT_ENABLE_IF(detail::is_exotic_char<Char>::value)>

inline auto formatted_size(const S& fmt, T&&... args) -> size_t {

  auto buf = detail::counting_buffer<Char>();

  detail::vformat_to(buf, detail::to_string_view(fmt),

                     fmt::make_format_args<buffered_context<Char>>(args...));

  return buf.count();

}

inline void vprint(std::FILE* f, wstring_view fmt, wformat_args args) {

  auto buf = wmemory_buffer();

  detail::vformat_to(buf, fmt, args);

  buf.push_back(L'\0');

  if (std::fputws(buf.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...));

}

template <typename... T>

void println(std::FILE* f, wformat_string<T...> fmt, T&&... args) {

  return print(f, L"{}\n", fmt::format(fmt, std::forward<T>(args)...));

}

template <typename... T> void println(wformat_string<T...> fmt, T&&... args) {

  return print(L"{}\n", fmt::format(fmt, std::forward<T>(args)...));

}

inline auto vformat(const text_style& ts, wstring_view fmt, wformat_args args)

    -> std::wstring {

  auto buf = wmemory_buffer();

  detail::vformat_to(buf, ts, fmt, args);

  return fmt::to_string(buf);

}

template <typename... T>

inline auto format(const text_style& ts, wformat_string<T...> fmt, T&&... args)

    -> std::wstring {

  return fmt::vformat(ts, fmt, fmt::make_wformat_args(args...));

}

template <typename... T>

FMT_DEPRECATED void print(std::FILE* f, const text_style& ts,

                          wformat_string<T...> fmt, const T&... args) {

  vprint(f, ts, fmt, fmt::make_wformat_args(args...));

}

template <typename... T>

FMT_DEPRECATED void print(const text_style& ts, wformat_string<T...> fmt,

                          const T&... args) {

  return print(stdout, ts, fmt, 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_END_EXPORT

FMT_END_NAMESPACE

#endif  // FMT_XCHAR_H_