98 lines
2.8 KiB
C++
98 lines
2.8 KiB
C++
// -*- C++ -*-
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//===----------------------------------------------------------------------===//
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//
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// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
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// See https://llvm.org/LICENSE.txt for license information.
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// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
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//
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//===----------------------------------------------------------------------===//
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#ifndef _LIBCPP___FORMAT_FORMATTER_CHAR_H
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#define _LIBCPP___FORMAT_FORMATTER_CHAR_H
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#include <__availability>
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#include <__config>
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#include <__format/format_error.h>
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#include <__format/format_fwd.h>
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#include <__format/formatter.h>
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#include <__format/formatter_integral.h>
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#include <__format/parser_std_format_spec.h>
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#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER)
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# pragma GCC system_header
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#endif
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_LIBCPP_BEGIN_NAMESPACE_STD
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#if _LIBCPP_STD_VER > 17
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namespace __format_spec {
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template <class _CharT>
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class _LIBCPP_TEMPLATE_VIS __parser_char : public __parser_integral<_CharT> {
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public:
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_LIBCPP_HIDE_FROM_ABI constexpr auto parse(auto& __parse_ctx)
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-> decltype(__parse_ctx.begin()) {
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auto __it = __parser_integral<_CharT>::__parse(__parse_ctx);
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switch (this->__type) {
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case _Flags::_Type::__default:
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this->__type = _Flags::_Type::__char;
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[[fallthrough]];
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case _Flags::_Type::__char:
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this->__handle_char();
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break;
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case _Flags::_Type::__binary_lower_case:
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case _Flags::_Type::__binary_upper_case:
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case _Flags::_Type::__octal:
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case _Flags::_Type::__decimal:
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case _Flags::_Type::__hexadecimal_lower_case:
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case _Flags::_Type::__hexadecimal_upper_case:
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this->__handle_integer();
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break;
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default:
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__throw_format_error(
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"The format-spec type has a type not supported for a char argument");
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}
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return __it;
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}
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};
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template <class _CharT>
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using __formatter_char = __formatter_integral<__parser_char<_CharT>>;
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} // namespace __format_spec
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// [format.formatter.spec]/2.1 The specializations
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template <>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<char, char>
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: public __format_spec::__formatter_char<char> {};
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#ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS
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template <>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<char, wchar_t>
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: public __format_spec::__formatter_char<wchar_t> {
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using _Base = __format_spec::__formatter_char<wchar_t>;
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_LIBCPP_HIDE_FROM_ABI auto format(char __value, auto& __ctx)
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-> decltype(__ctx.out()) {
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return _Base::format(static_cast<wchar_t>(__value), __ctx);
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}
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};
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template <>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT
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formatter<wchar_t, wchar_t>
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: public __format_spec::__formatter_char<wchar_t> {};
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#endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS
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#endif //_LIBCPP_STD_VER > 17
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_LIBCPP_END_NAMESPACE_STD
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#endif // _LIBCPP___FORMAT_FORMATTER_CHAR_H
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