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// 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_WCHAR_H_
#define FMT_WCHAR_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), make_wformat_args(args...));
}
template <typename... T> void print(wformat_string<T...> fmt, T&&... args) {
return vprint(wstring_view(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_WCHAR_H_
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