forked from OSchip/llvm-project
85 lines
3.0 KiB
C++
85 lines
3.0 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 <__concepts/same_as.h>
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#include <__config>
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#include <__format/format_fwd.h>
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#include <__format/format_parse_context.h>
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#include <__format/formatter.h>
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#include <__format/formatter_integral.h>
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#include <__format/formatter_output.h>
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#include <__format/parser_std_format_spec.h>
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#include <__type_traits/conditional.h>
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#include <__type_traits/is_signed.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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template <__formatter::__char_type _CharT>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT __formatter_char {
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public:
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_LIBCPP_HIDE_FROM_ABI constexpr auto
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parse(basic_format_parse_context<_CharT>& __parse_ctx) -> decltype(__parse_ctx.begin()) {
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auto __result = __parser_.__parse(__parse_ctx, __format_spec::__fields_integral);
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__format_spec::__process_parsed_char(__parser_);
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return __result;
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}
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_LIBCPP_HIDE_FROM_ABI auto format(_CharT __value, auto& __ctx) const -> decltype(__ctx.out()) {
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if (__parser_.__type_ == __format_spec::__type::__default || __parser_.__type_ == __format_spec::__type::__char)
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return __formatter::__format_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx));
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if constexpr (sizeof(_CharT) <= sizeof(int))
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// Promotes _CharT to an integral type. This reduces the number of
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// instantiations of __format_integer reducing code size.
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return __formatter::__format_integer(
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static_cast<conditional_t<is_signed_v<_CharT>, int, unsigned>>(__value),
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__ctx,
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__parser_.__get_parsed_std_specifications(__ctx));
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else
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return __formatter::__format_integer(__value, __ctx, __parser_.__get_parsed_std_specifications(__ctx));
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}
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_LIBCPP_HIDE_FROM_ABI auto format(char __value, auto& __ctx) const -> decltype(__ctx.out())
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requires(same_as<_CharT, wchar_t>)
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{
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return format(static_cast<wchar_t>(__value), __ctx);
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}
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__format_spec::__parser<_CharT> __parser_;
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};
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template <>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<char, char> : public __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> : public __formatter_char<wchar_t> {};
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template <>
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struct _LIBCPP_TEMPLATE_VIS _LIBCPP_AVAILABILITY_FORMAT formatter<wchar_t, wchar_t> : public __formatter_char<wchar_t> {
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};
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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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