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