libcxx/include/__format/formatter_integer.h

   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_INTEGER_H
  11 #define _LIBCPP___FORMAT_FORMATTER_INTEGER_H
  12
  13 #include <__availability>
  14 #include <__concepts/arithmetic.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 <__type_traits/is_void.h>
  23 #include <__type_traits/make_32_64_or_128_bit.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_integer {
  35
  36 public:
  37   template <class _ParseContext>
  38   _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_integer(__parser_, "an integer");
  41     return __result;
  42   }
  43
  44   template <integral _Tp, class _FormatContext>
  45   _LIBCPP_HIDE_FROM_ABI typename _FormatContext::iterator format(_Tp __value, _FormatContext& __ctx) const {
  46     __format_spec::__parsed_specifications<_CharT> __specs = __parser_.__get_parsed_std_specifications(__ctx);
  47
  48     if (__specs.__std_.__type_ == __format_spec::__type::__char)
  49       return __formatter::__format_char(__value, __ctx.out(), __specs);
  50
  51     using _Type = __make_32_64_or_128_bit_t<_Tp>;
  52     static_assert(!is_void<_Type>::value, "unsupported integral type used in __formatter_integer::__format");
  53
  54     // Reduce the number of instantiation of the integer formatter
  55     return __formatter::__format_integer(static_cast<_Type>(__value), __ctx, __specs);
  56   }
  57
  58   __format_spec::__parser<_CharT> __parser_;
  59 };
  60
  61 // Signed integral types.
  62 template <__fmt_char_type _CharT>
  63 struct _LIBCPP_TEMPLATE_VIS formatter<signed char, _CharT>
  64     : public __formatter_integer<_CharT> {};
  65 template <__fmt_char_type _CharT>
  66 struct _LIBCPP_TEMPLATE_VIS formatter<short, _CharT> : public __formatter_integer<_CharT> {
  67 };
  68 template <__fmt_char_type _CharT>
  69 struct _LIBCPP_TEMPLATE_VIS formatter<int, _CharT> : public __formatter_integer<_CharT> {};
  70 template <__fmt_char_type _CharT>
  71 struct _LIBCPP_TEMPLATE_VIS formatter<long, _CharT> : public __formatter_integer<_CharT> {};
  72 template <__fmt_char_type _CharT>
  73 struct _LIBCPP_TEMPLATE_VIS formatter<long long, _CharT>
  74     : public __formatter_integer<_CharT> {};
  75 #  ifndef _LIBCPP_HAS_NO_INT128
  76 template <__fmt_char_type _CharT>
  77 struct _LIBCPP_TEMPLATE_VIS formatter<__int128_t, _CharT>
  78     : public __formatter_integer<_CharT> {};
  79 #  endif
  80
  81 // Unsigned integral types.
  82 template <__fmt_char_type _CharT>
  83 struct _LIBCPP_TEMPLATE_VIS formatter<unsigned char, _CharT>
  84     : public __formatter_integer<_CharT> {};
  85 template <__fmt_char_type _CharT>
  86 struct _LIBCPP_TEMPLATE_VIS formatter<unsigned short, _CharT>
  87     : public __formatter_integer<_CharT> {};
  88 template <__fmt_char_type _CharT>
  89 struct _LIBCPP_TEMPLATE_VIS formatter<unsigned, _CharT>
  90     : public __formatter_integer<_CharT> {};
  91 template <__fmt_char_type _CharT>
  92 struct _LIBCPP_TEMPLATE_VIS formatter<unsigned long, _CharT>
  93     : public __formatter_integer<_CharT> {};
  94 template <__fmt_char_type _CharT>
  95 struct _LIBCPP_TEMPLATE_VIS formatter<unsigned long long, _CharT>
  96     : public __formatter_integer<_CharT> {};
  97 #  ifndef _LIBCPP_HAS_NO_INT128
  98 template <__fmt_char_type _CharT>
  99 struct _LIBCPP_TEMPLATE_VIS formatter<__uint128_t, _CharT>
 100     : public __formatter_integer<_CharT> {};
 101 #  endif
 102
 103 #endif //_LIBCPP_STD_VER >= 20
 104
 105 _LIBCPP_END_NAMESPACE_STD
 106
 107 #endif // _LIBCPP___FORMAT_FORMATTER_INTEGER_H