1 // -*- C++ -*- 2 //===----------------------------------------------------------------------===// 3 // 4 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5 // See https://llvm.org/LICENSE.txt for license information. 6 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7 // 8 //===----------------------------------------------------------------------===// 9 10 #ifndef _LIBCPP___FORMAT_FORMATTER_CHAR_H 11 #define _LIBCPP___FORMAT_FORMATTER_CHAR_H 12 13 #include <__concepts/same_as.h> 14 #include <__config> 15 #include <__format/concepts.h> 16 #include <__format/format_parse_context.h> 17 #include <__format/formatter.h> 18 #include <__format/formatter_integral.h> 19 #include <__format/formatter_output.h> 20 #include <__format/parser_std_format_spec.h> 21 #include <__format/write_escaped.h> 22 #include <__type_traits/conditional.h> 23 #include <__type_traits/make_unsigned.h> 24 25 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 26 # pragma GCC system_header 27 #endif 28 29 _LIBCPP_BEGIN_NAMESPACE_STD 30 31 #if _LIBCPP_STD_VER >= 20 32 33 template <__fmt_char_type _CharT> 34 struct _LIBCPP_TEMPLATE_VIS __formatter_char { 35 public: 36 template <class _ParseContext> parse__formatter_char37 _LIBCPP_HIDE_FROM_ABI constexpr typename _ParseContext::iterator parse(_ParseContext& __ctx) { 38 typename _ParseContext::iterator __result = __parser_.__parse(__ctx, __format_spec::__fields_integral); 39 __format_spec::__process_parsed_char(__parser_, "a character"); 40 return __result; 41 } 42 43 template <class _FormatContext> format__formatter_char44 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(_CharT __value, _FormatContext& __ctx) const { 45 if (__parser_.__type_ == __format_spec::__type::__default || __parser_.__type_ == __format_spec::__type::__char) 46 return __formatter::__format_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx)); 47 48 # if _LIBCPP_STD_VER >= 23 49 if (__parser_.__type_ == __format_spec::__type::__debug) 50 return __formatter::__format_escaped_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx)); 51 # endif 52 53 if constexpr (sizeof(_CharT) <= sizeof(unsigned)) 54 return __formatter::__format_integer( 55 static_cast<unsigned>(static_cast<make_unsigned_t<_CharT>>(__value)), 56 __ctx, 57 __parser_.__get_parsed_std_specifications(__ctx)); 58 else 59 return __formatter::__format_integer( 60 static_cast<make_unsigned_t<_CharT>>(__value), __ctx, __parser_.__get_parsed_std_specifications(__ctx)); 61 } 62 63 template <class _FormatContext> format__formatter_char64 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(char __value, _FormatContext& __ctx) const 65 requires(same_as<_CharT, wchar_t>) 66 { 67 return format(static_cast<wchar_t>(static_cast<unsigned char>(__value)), __ctx); 68 } 69 70 # if _LIBCPP_STD_VER >= 23 set_debug_format__formatter_char71 _LIBCPP_HIDE_FROM_ABI constexpr void set_debug_format() { __parser_.__type_ = __format_spec::__type::__debug; } 72 # endif 73 74 __format_spec::__parser<_CharT> __parser_; 75 }; 76 77 template <> 78 struct _LIBCPP_TEMPLATE_VIS formatter<char, char> : public __formatter_char<char> {}; 79 80 # ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 81 template <> 82 struct _LIBCPP_TEMPLATE_VIS formatter<char, wchar_t> : public __formatter_char<wchar_t> {}; 83 84 template <> 85 struct _LIBCPP_TEMPLATE_VIS formatter<wchar_t, wchar_t> : public __formatter_char<wchar_t> {}; 86 87 # endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 88 89 #endif //_LIBCPP_STD_VER >= 20 90 91 _LIBCPP_END_NAMESPACE_STD 92 93 #endif // _LIBCPP___FORMAT_FORMATTER_CHAR_H 94