1 | // Standard stream manipulators -*- C++ -*-
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2 |
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3 | // Copyright (C) 1997-2021 Free Software Foundation, Inc.
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4 | //
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5 | // This file is part of the GNU ISO C++ Library. This library is free
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6 | // software; you can redistribute it and/or modify it under the
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7 | // terms of the GNU General Public License as published by the
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8 | // Free Software Foundation; either version 3, or (at your option)
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9 | // any later version.
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10 |
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11 | // This library is distributed in the hope that it will be useful,
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12 | // but WITHOUT ANY WARRANTY; without even the implied warranty of
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13 | // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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14 | // GNU General Public License for more details.
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15 |
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16 | // Under Section 7 of GPL version 3, you are granted additional
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17 | // permissions described in the GCC Runtime Library Exception, version
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18 | // 3.1, as published by the Free Software Foundation.
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19 |
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20 | // You should have received a copy of the GNU General Public License and
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21 | // a copy of the GCC Runtime Library Exception along with this program;
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22 | // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
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23 | // <http://www.gnu.org/licenses/>.
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24 |
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25 | /** @file include/iomanip
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26 | * This is a Standard C++ Library header.
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27 | */
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28 |
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29 | //
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30 | // ISO C++ 14882: 27.6.3 Standard manipulators
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31 | //
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32 |
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33 | #ifndef _GLIBCXX_IOMANIP
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34 | #define _GLIBCXX_IOMANIP 1
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35 |
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36 | #pragma GCC system_header
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37 |
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38 | #include <bits/c++config.h>
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39 | #include <iosfwd>
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40 | #include <bits/ios_base.h>
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41 |
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42 | #if __cplusplus >= 201103L
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43 | #include <locale>
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44 | #if __cplusplus > 201103L
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45 | #include <bits/quoted_string.h>
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46 | #endif
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47 | #endif
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48 |
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49 | namespace std _GLIBCXX_VISIBILITY(default)
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50 | {
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51 | _GLIBCXX_BEGIN_NAMESPACE_VERSION
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52 |
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53 | // [27.6.3] standard manipulators
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54 | // Also see DR 183.
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55 |
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56 | struct _Resetiosflags { ios_base::fmtflags _M_mask; };
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57 |
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58 | /**
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59 | * @brief Manipulator for @c setf.
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60 | * @param __mask A format flags mask.
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61 | *
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62 | * Sent to a stream object, this manipulator resets the specified flags,
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63 | * via @e stream.setf(0,__mask).
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64 | */
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65 | inline _Resetiosflags
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66 | resetiosflags(ios_base::fmtflags __mask)
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67 | { return { __mask }; }
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68 |
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69 | template<typename _CharT, typename _Traits>
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70 | inline basic_istream<_CharT, _Traits>&
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71 | operator>>(basic_istream<_CharT, _Traits>& __is, _Resetiosflags __f)
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72 | {
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73 | __is.setf(ios_base::fmtflags(0), __f._M_mask);
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74 | return __is;
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75 | }
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76 |
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77 | template<typename _CharT, typename _Traits>
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78 | inline basic_ostream<_CharT, _Traits>&
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79 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Resetiosflags __f)
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80 | {
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81 | __os.setf(ios_base::fmtflags(0), __f._M_mask);
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82 | return __os;
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83 | }
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84 |
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85 |
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86 | struct _Setiosflags { ios_base::fmtflags _M_mask; };
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87 |
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88 | /**
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89 | * @brief Manipulator for @c setf.
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90 | * @param __mask A format flags mask.
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91 | *
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92 | * Sent to a stream object, this manipulator sets the format flags
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93 | * to @a __mask.
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94 | */
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95 | inline _Setiosflags
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96 | setiosflags(ios_base::fmtflags __mask)
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97 | { return { __mask }; }
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98 |
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99 | template<typename _CharT, typename _Traits>
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100 | inline basic_istream<_CharT, _Traits>&
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101 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setiosflags __f)
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102 | {
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103 | __is.setf(__f._M_mask);
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104 | return __is;
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105 | }
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106 |
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107 | template<typename _CharT, typename _Traits>
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108 | inline basic_ostream<_CharT, _Traits>&
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109 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setiosflags __f)
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110 | {
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111 | __os.setf(__f._M_mask);
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112 | return __os;
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113 | }
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114 |
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115 |
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116 | struct _Setbase { int _M_base; };
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117 |
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118 | /**
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119 | * @brief Manipulator for @c setf.
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120 | * @param __base A numeric base.
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121 | *
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122 | * Sent to a stream object, this manipulator changes the
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123 | * @c ios_base::basefield flags to @c oct, @c dec, or @c hex when @a base
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124 | * is 8, 10, or 16, accordingly, and to 0 if @a __base is any other value.
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125 | */
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126 | inline _Setbase
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127 | setbase(int __base)
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128 | { return { __base }; }
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129 |
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130 | template<typename _CharT, typename _Traits>
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131 | inline basic_istream<_CharT, _Traits>&
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132 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setbase __f)
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133 | {
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134 | __is.setf(__f._M_base == 8 ? ios_base::oct :
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135 | __f._M_base == 10 ? ios_base::dec :
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136 | __f._M_base == 16 ? ios_base::hex :
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137 | ios_base::fmtflags(0), ios_base::basefield);
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138 | return __is;
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139 | }
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140 |
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141 | template<typename _CharT, typename _Traits>
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142 | inline basic_ostream<_CharT, _Traits>&
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143 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setbase __f)
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144 | {
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145 | __os.setf(__f._M_base == 8 ? ios_base::oct :
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146 | __f._M_base == 10 ? ios_base::dec :
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147 | __f._M_base == 16 ? ios_base::hex :
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148 | ios_base::fmtflags(0), ios_base::basefield);
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149 | return __os;
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150 | }
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151 |
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152 |
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153 | template<typename _CharT>
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154 | struct _Setfill { _CharT _M_c; };
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155 |
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156 | /**
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157 | * @brief Manipulator for @c fill.
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158 | * @param __c The new fill character.
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159 | *
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160 | * Sent to a stream object, this manipulator calls @c fill(__c) for that
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161 | * object.
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162 | */
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163 | template<typename _CharT>
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164 | inline _Setfill<_CharT>
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165 | setfill(_CharT __c)
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166 | { return { __c }; }
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167 |
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168 | template<typename _CharT, typename _Traits>
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169 | inline basic_istream<_CharT, _Traits>&
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170 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setfill<_CharT> __f)
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171 | {
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172 | __is.fill(__f._M_c);
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173 | return __is;
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174 | }
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175 |
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176 | template<typename _CharT, typename _Traits>
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177 | inline basic_ostream<_CharT, _Traits>&
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178 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setfill<_CharT> __f)
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179 | {
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180 | __os.fill(__f._M_c);
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181 | return __os;
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182 | }
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183 |
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184 |
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185 | struct _Setprecision { int _M_n; };
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186 |
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187 | /**
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188 | * @brief Manipulator for @c precision.
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189 | * @param __n The new precision.
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190 | *
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191 | * Sent to a stream object, this manipulator calls @c precision(__n) for
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192 | * that object.
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193 | */
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194 | inline _Setprecision
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195 | setprecision(int __n)
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196 | { return { __n }; }
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197 |
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198 | template<typename _CharT, typename _Traits>
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199 | inline basic_istream<_CharT, _Traits>&
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200 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setprecision __f)
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201 | {
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202 | __is.precision(__f._M_n);
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203 | return __is;
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204 | }
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205 |
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206 | template<typename _CharT, typename _Traits>
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207 | inline basic_ostream<_CharT, _Traits>&
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208 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setprecision __f)
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209 | {
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210 | __os.precision(__f._M_n);
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211 | return __os;
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212 | }
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213 |
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214 |
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215 | struct _Setw { int _M_n; };
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216 |
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217 | /**
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218 | * @brief Manipulator for @c width.
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219 | * @param __n The new width.
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220 | *
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221 | * Sent to a stream object, this manipulator calls @c width(__n) for
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222 | * that object.
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223 | */
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224 | inline _Setw
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225 | setw(int __n)
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226 | { return { __n }; }
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227 |
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228 | template<typename _CharT, typename _Traits>
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229 | inline basic_istream<_CharT, _Traits>&
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230 | operator>>(basic_istream<_CharT, _Traits>& __is, _Setw __f)
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231 | {
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232 | __is.width(__f._M_n);
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233 | return __is;
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234 | }
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235 |
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236 | template<typename _CharT, typename _Traits>
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237 | inline basic_ostream<_CharT, _Traits>&
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238 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Setw __f)
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239 | {
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240 | __os.width(__f._M_n);
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241 | return __os;
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242 | }
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243 |
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244 | #if __cplusplus >= 201103L
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245 |
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246 | template<typename _MoneyT>
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247 | struct _Get_money { _MoneyT& _M_mon; bool _M_intl; };
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248 |
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249 | /**
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250 | * @brief Extended manipulator for extracting money.
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251 | * @param __mon Either long double or a specialization of @c basic_string.
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252 | * @param __intl A bool indicating whether international format
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253 | * is to be used.
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254 | *
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255 | * Sent to a stream object, this manipulator extracts @a __mon.
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256 | */
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257 | template<typename _MoneyT>
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258 | inline _Get_money<_MoneyT>
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259 | get_money(_MoneyT& __mon, bool __intl = false)
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260 | { return { __mon, __intl }; }
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261 |
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262 | template<typename _CharT, typename _Traits, typename _MoneyT>
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263 | basic_istream<_CharT, _Traits>&
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264 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_money<_MoneyT> __f)
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265 | {
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266 | typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false);
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267 | if (__cerb)
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268 | {
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269 | ios_base::iostate __err = ios_base::goodbit;
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270 | __try
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271 | {
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272 | typedef istreambuf_iterator<_CharT, _Traits> _Iter;
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273 | typedef money_get<_CharT, _Iter> _MoneyGet;
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274 |
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275 | const _MoneyGet& __mg = use_facet<_MoneyGet>(__is.getloc());
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276 | __mg.get(_Iter(__is.rdbuf()), _Iter(), __f._M_intl,
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277 | __is, __err, __f._M_mon);
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278 | }
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279 | __catch(__cxxabiv1::__forced_unwind&)
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280 | {
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281 | __is._M_setstate(ios_base::badbit);
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282 | __throw_exception_again;
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283 | }
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284 | __catch(...)
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285 | { __is._M_setstate(ios_base::badbit); }
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286 | if (__err)
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287 | __is.setstate(__err);
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288 | }
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289 | return __is;
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290 | }
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291 |
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292 |
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293 | template<typename _MoneyT>
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294 | struct _Put_money { const _MoneyT& _M_mon; bool _M_intl; };
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295 |
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296 | /**
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297 | * @brief Extended manipulator for inserting money.
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298 | * @param __mon Either long double or a specialization of @c basic_string.
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299 | * @param __intl A bool indicating whether international format
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300 | * is to be used.
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301 | *
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302 | * Sent to a stream object, this manipulator inserts @a __mon.
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303 | */
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304 | template<typename _MoneyT>
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305 | inline _Put_money<_MoneyT>
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306 | put_money(const _MoneyT& __mon, bool __intl = false)
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307 | { return { __mon, __intl }; }
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308 |
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309 | template<typename _CharT, typename _Traits, typename _MoneyT>
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310 | basic_ostream<_CharT, _Traits>&
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311 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_money<_MoneyT> __f)
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312 | {
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313 | typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os);
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314 | if (__cerb)
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315 | {
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316 | ios_base::iostate __err = ios_base::goodbit;
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317 | __try
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318 | {
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319 | typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
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320 | typedef money_put<_CharT, _Iter> _MoneyPut;
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321 |
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322 | const _MoneyPut& __mp = use_facet<_MoneyPut>(__os.getloc());
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323 | if (__mp.put(_Iter(__os.rdbuf()), __f._M_intl, __os,
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324 | __os.fill(), __f._M_mon).failed())
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325 | __err |= ios_base::badbit;
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326 | }
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327 | __catch(__cxxabiv1::__forced_unwind&)
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328 | {
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329 | __os._M_setstate(ios_base::badbit);
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330 | __throw_exception_again;
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331 | }
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332 | __catch(...)
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333 | { __os._M_setstate(ios_base::badbit); }
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334 | if (__err)
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335 | __os.setstate(__err);
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336 | }
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337 | return __os;
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338 | }
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339 |
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340 | template<typename _CharT>
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341 | struct _Put_time
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342 | {
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343 | const std::tm* _M_tmb;
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344 | const _CharT* _M_fmt;
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345 | };
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346 |
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347 | /**
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348 | * @brief Extended manipulator for formatting time.
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349 | *
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350 | * This manipulator uses time_put::put to format time.
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351 | * [ext.manip]
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352 | *
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353 | * @param __tmb struct tm time data to format.
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354 | * @param __fmt format string.
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355 | */
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356 | template<typename _CharT>
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357 | inline _Put_time<_CharT>
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358 | put_time(const std::tm* __tmb, const _CharT* __fmt)
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359 | { return { __tmb, __fmt }; }
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360 |
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361 | template<typename _CharT, typename _Traits>
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362 | basic_ostream<_CharT, _Traits>&
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363 | operator<<(basic_ostream<_CharT, _Traits>& __os, _Put_time<_CharT> __f)
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364 | {
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365 | typename basic_ostream<_CharT, _Traits>::sentry __cerb(__os);
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366 | if (__cerb)
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367 | {
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368 | ios_base::iostate __err = ios_base::goodbit;
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369 | __try
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370 | {
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371 | typedef ostreambuf_iterator<_CharT, _Traits> _Iter;
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372 | typedef time_put<_CharT, _Iter> _TimePut;
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373 |
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374 | const _CharT* const __fmt_end = __f._M_fmt +
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375 | _Traits::length(__f._M_fmt);
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376 |
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377 | const _TimePut& __mp = use_facet<_TimePut>(__os.getloc());
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378 | if (__mp.put(_Iter(__os.rdbuf()), __os, __os.fill(),
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379 | __f._M_tmb, __f._M_fmt, __fmt_end).failed())
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380 | __err |= ios_base::badbit;
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381 | }
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382 | __catch(__cxxabiv1::__forced_unwind&)
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383 | {
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384 | __os._M_setstate(ios_base::badbit);
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385 | __throw_exception_again;
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386 | }
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387 | __catch(...)
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388 | { __os._M_setstate(ios_base::badbit); }
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389 | if (__err)
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390 | __os.setstate(__err);
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391 | }
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392 | return __os;
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393 | }
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394 |
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395 | template<typename _CharT>
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396 | struct _Get_time
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397 | {
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398 | std::tm* _M_tmb;
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399 | const _CharT* _M_fmt;
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400 | };
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401 |
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402 | /**
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403 | * @brief Extended manipulator for extracting time.
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404 | *
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405 | * This manipulator uses time_get::get to extract time.
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406 | * [ext.manip]
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407 | *
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408 | * @param __tmb struct to extract the time data to.
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409 | * @param __fmt format string.
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410 | */
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411 | template<typename _CharT>
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412 | inline _Get_time<_CharT>
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413 | get_time(std::tm* __tmb, const _CharT* __fmt)
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414 | { return { __tmb, __fmt }; }
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415 |
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416 | template<typename _CharT, typename _Traits>
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417 | basic_istream<_CharT, _Traits>&
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418 | operator>>(basic_istream<_CharT, _Traits>& __is, _Get_time<_CharT> __f)
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419 | {
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420 | typename basic_istream<_CharT, _Traits>::sentry __cerb(__is, false);
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421 | if (__cerb)
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422 | {
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423 | ios_base::iostate __err = ios_base::goodbit;
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424 | __try
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425 | {
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426 | typedef istreambuf_iterator<_CharT, _Traits> _Iter;
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427 | typedef time_get<_CharT, _Iter> _TimeGet;
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428 |
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429 | const _CharT* const __fmt_end = __f._M_fmt +
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430 | _Traits::length(__f._M_fmt);
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431 |
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432 | const _TimeGet& __mg = use_facet<_TimeGet>(__is.getloc());
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433 | __mg.get(_Iter(__is.rdbuf()), _Iter(), __is,
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434 | __err, __f._M_tmb, __f._M_fmt, __fmt_end);
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435 | }
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436 | __catch(__cxxabiv1::__forced_unwind&)
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437 | {
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438 | __is._M_setstate(ios_base::badbit);
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439 | __throw_exception_again;
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440 | }
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441 | __catch(...)
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442 | { __is._M_setstate(ios_base::badbit); }
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443 | if (__err)
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444 | __is.setstate(__err);
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445 | }
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446 | return __is;
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447 | }
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448 |
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449 | #if __cplusplus >= 201402L
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450 |
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451 | #define __cpp_lib_quoted_string_io 201304
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452 |
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453 | /**
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454 | * @brief Manipulator for quoted strings.
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455 | * @param __string String to quote.
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456 | * @param __delim Character to quote string with.
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457 | * @param __escape Escape character to escape itself or quote character.
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458 | */
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459 | template<typename _CharT>
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460 | inline auto
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461 | quoted(const _CharT* __string,
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462 | _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\'))
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463 | {
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464 | return __detail::_Quoted_string<const _CharT*, _CharT>(__string, __delim,
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465 | __escape);
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466 | }
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467 |
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468 | template<typename _CharT, typename _Traits, typename _Alloc>
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469 | inline auto
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470 | quoted(const basic_string<_CharT, _Traits, _Alloc>& __string,
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471 | _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\'))
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472 | {
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473 | return __detail::_Quoted_string<
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474 | const basic_string<_CharT, _Traits, _Alloc>&, _CharT>(
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475 | __string, __delim, __escape);
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476 | }
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477 |
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478 | template<typename _CharT, typename _Traits, typename _Alloc>
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479 | inline auto
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480 | quoted(basic_string<_CharT, _Traits, _Alloc>& __string,
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481 | _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\'))
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482 | {
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483 | return __detail::_Quoted_string<
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484 | basic_string<_CharT, _Traits, _Alloc>&, _CharT>(
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485 | __string, __delim, __escape);
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486 | }
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487 |
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488 | #if __cplusplus >= 201703L
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489 | // _GLIBCXX_RESOLVE_LIB_DEFECTS
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490 | // 2785. quoted should work with basic_string_view
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491 | template<typename _CharT, typename _Traits>
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492 | inline auto
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493 | quoted(basic_string_view<_CharT, _Traits> __sv,
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494 | _CharT __delim = _CharT('"'), _CharT __escape = _CharT('\\'))
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495 | {
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496 | return __detail::_Quoted_string<
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497 | basic_string_view<_CharT, _Traits>, _CharT>(__sv, __delim, __escape);
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498 | }
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499 | #endif // C++17
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500 | #endif // C++14
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501 |
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502 | #endif // __cplusplus >= 201103L
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503 |
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504 | // Inhibit implicit instantiations for required instantiations,
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505 | // which are defined via explicit instantiations elsewhere.
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506 | // NB: This syntax is a GNU extension.
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507 | #if _GLIBCXX_EXTERN_TEMPLATE
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508 | extern template ostream& operator<<(ostream&, _Setfill<char>);
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509 | extern template ostream& operator<<(ostream&, _Setiosflags);
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510 | extern template ostream& operator<<(ostream&, _Resetiosflags);
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511 | extern template ostream& operator<<(ostream&, _Setbase);
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512 | extern template ostream& operator<<(ostream&, _Setprecision);
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513 | extern template ostream& operator<<(ostream&, _Setw);
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514 | extern template istream& operator>>(istream&, _Setfill<char>);
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515 | extern template istream& operator>>(istream&, _Setiosflags);
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516 | extern template istream& operator>>(istream&, _Resetiosflags);
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517 | extern template istream& operator>>(istream&, _Setbase);
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518 | extern template istream& operator>>(istream&, _Setprecision);
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519 | extern template istream& operator>>(istream&, _Setw);
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520 |
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521 | #ifdef _GLIBCXX_USE_WCHAR_T
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522 | extern template wostream& operator<<(wostream&, _Setfill<wchar_t>);
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523 | extern template wostream& operator<<(wostream&, _Setiosflags);
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524 | extern template wostream& operator<<(wostream&, _Resetiosflags);
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525 | extern template wostream& operator<<(wostream&, _Setbase);
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526 | extern template wostream& operator<<(wostream&, _Setprecision);
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527 | extern template wostream& operator<<(wostream&, _Setw);
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528 | extern template wistream& operator>>(wistream&, _Setfill<wchar_t>);
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529 | extern template wistream& operator>>(wistream&, _Setiosflags);
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530 | extern template wistream& operator>>(wistream&, _Resetiosflags);
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531 | extern template wistream& operator>>(wistream&, _Setbase);
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532 | extern template wistream& operator>>(wistream&, _Setprecision);
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533 | extern template wistream& operator>>(wistream&, _Setw);
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534 | #endif
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535 | #endif
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536 |
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537 | _GLIBCXX_END_NAMESPACE_VERSION
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538 | } // namespace
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539 |
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540 | #endif /* _GLIBCXX_IOMANIP */
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