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 <__availability> 14 #include <__concepts/same_as.h> 15 #include <__config> 16 #include <__format/concepts.h> 17 #include <__format/format_parse_context.h> 18 #include <__format/formatter.h> 19 #include <__format/formatter_integral.h> 20 #include <__format/formatter_output.h> 21 #include <__format/parser_std_format_spec.h> 22 #include <__format/write_escaped.h> 23 #include <__type_traits/conditional.h> 24 #include <__type_traits/make_unsigned.h> 25 26 #if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 27 # pragma GCC system_header 28 #endif 29 30 _LIBCPP_BEGIN_NAMESPACE_STD 31 32 #if _LIBCPP_STD_VER >= 20 33 34 template <__fmt_char_type _CharT> 35 struct _LIBCPP_TEMPLATE_VIS __formatter_char { 36 public: 37 template <class _ParseContext> parse__formatter_char38 _LIBCPP_HIDE_FROM_ABI constexpr typename _ParseContext::iterator parse(_ParseContext& __ctx) { 39 typename _ParseContext::iterator __result = __parser_.__parse(__ctx, __format_spec::__fields_integral); 40 __format_spec::__process_parsed_char(__parser_, "a character"); 41 return __result; 42 } 43 44 template <class _FormatContext> format__formatter_char45 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(_CharT __value, _FormatContext& __ctx) const { 46 if (__parser_.__type_ == __format_spec::__type::__default || __parser_.__type_ == __format_spec::__type::__char) 47 return __formatter::__format_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx)); 48 49 # if _LIBCPP_STD_VER >= 23 50 if (__parser_.__type_ == __format_spec::__type::__debug) 51 return __formatter::__format_escaped_char(__value, __ctx.out(), __parser_.__get_parsed_std_specifications(__ctx)); 52 # endif 53 54 if constexpr (sizeof(_CharT) <= sizeof(unsigned)) 55 return __formatter::__format_integer( 56 static_cast<unsigned>(static_cast<make_unsigned_t<_CharT>>(__value)), 57 __ctx, 58 __parser_.__get_parsed_std_specifications(__ctx)); 59 else 60 return __formatter::__format_integer( 61 static_cast<make_unsigned_t<_CharT>>(__value), __ctx, __parser_.__get_parsed_std_specifications(__ctx)); 62 } 63 64 template <class _FormatContext> format__formatter_char65 _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(char __value, _FormatContext& __ctx) const 66 requires(same_as<_CharT, wchar_t>) 67 { 68 return format(static_cast<wchar_t>(static_cast<unsigned char>(__value)), __ctx); 69 } 70 71 # if _LIBCPP_STD_VER >= 23 set_debug_format__formatter_char72 _LIBCPP_HIDE_FROM_ABI constexpr void set_debug_format() { __parser_.__type_ = __format_spec::__type::__debug; } 73 # endif 74 75 __format_spec::__parser<_CharT> __parser_; 76 }; 77 78 template <> 79 struct _LIBCPP_TEMPLATE_VIS formatter<char, char> : public __formatter_char<char> {}; 80 81 # ifndef _LIBCPP_HAS_NO_WIDE_CHARACTERS 82 template <> 83 struct _LIBCPP_TEMPLATE_VIS formatter<char, wchar_t> : public __formatter_char<wchar_t> {}; 84 85 template <> 86 struct _LIBCPP_TEMPLATE_VIS formatter<wchar_t, wchar_t> : public __formatter_char<wchar_t> {}; 87 88 # endif // _LIBCPP_HAS_NO_WIDE_CHARACTERS 89 90 #endif //_LIBCPP_STD_VER >= 20 91 92 _LIBCPP_END_NAMESPACE_STD 93 94 #endif // _LIBCPP___FORMAT_FORMATTER_CHAR_H 95