1 | n/a | /* Boolean type, a subtype of int */ |
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2 | n/a | |
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3 | n/a | #include "Python.h" |
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4 | n/a | #include "longintrepr.h" |
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5 | n/a | |
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6 | n/a | /* We define bool_repr to return "False" or "True" */ |
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7 | n/a | |
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8 | n/a | static PyObject *false_str = NULL; |
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9 | n/a | static PyObject *true_str = NULL; |
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10 | n/a | |
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11 | n/a | static PyObject * |
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12 | n/a | bool_repr(PyObject *self) |
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13 | n/a | { |
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14 | n/a | PyObject *s; |
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15 | n/a | |
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16 | n/a | if (self == Py_True) |
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17 | n/a | s = true_str ? true_str : |
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18 | n/a | (true_str = PyUnicode_InternFromString("True")); |
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19 | n/a | else |
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20 | n/a | s = false_str ? false_str : |
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21 | n/a | (false_str = PyUnicode_InternFromString("False")); |
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22 | n/a | Py_XINCREF(s); |
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23 | n/a | return s; |
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24 | n/a | } |
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25 | n/a | |
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26 | n/a | /* Function to return a bool from a C long */ |
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27 | n/a | |
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28 | n/a | PyObject *PyBool_FromLong(long ok) |
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29 | n/a | { |
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30 | n/a | PyObject *result; |
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31 | n/a | |
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32 | n/a | if (ok) |
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33 | n/a | result = Py_True; |
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34 | n/a | else |
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35 | n/a | result = Py_False; |
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36 | n/a | Py_INCREF(result); |
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37 | n/a | return result; |
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38 | n/a | } |
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39 | n/a | |
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40 | n/a | /* We define bool_new to always return either Py_True or Py_False */ |
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41 | n/a | |
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42 | n/a | static PyObject * |
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43 | n/a | bool_new(PyTypeObject *type, PyObject *args, PyObject *kwds) |
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44 | n/a | { |
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45 | n/a | static char *kwlist[] = {"x", 0}; |
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46 | n/a | PyObject *x = Py_False; |
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47 | n/a | long ok; |
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48 | n/a | |
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49 | n/a | if (!PyArg_ParseTupleAndKeywords(args, kwds, "|O:bool", kwlist, &x)) |
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50 | n/a | return NULL; |
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51 | n/a | ok = PyObject_IsTrue(x); |
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52 | n/a | if (ok < 0) |
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53 | n/a | return NULL; |
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54 | n/a | return PyBool_FromLong(ok); |
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55 | n/a | } |
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56 | n/a | |
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57 | n/a | /* Arithmetic operations redefined to return bool if both args are bool. */ |
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58 | n/a | |
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59 | n/a | static PyObject * |
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60 | n/a | bool_and(PyObject *a, PyObject *b) |
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61 | n/a | { |
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62 | n/a | if (!PyBool_Check(a) || !PyBool_Check(b)) |
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63 | n/a | return PyLong_Type.tp_as_number->nb_and(a, b); |
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64 | n/a | return PyBool_FromLong((a == Py_True) & (b == Py_True)); |
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65 | n/a | } |
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66 | n/a | |
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67 | n/a | static PyObject * |
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68 | n/a | bool_or(PyObject *a, PyObject *b) |
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69 | n/a | { |
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70 | n/a | if (!PyBool_Check(a) || !PyBool_Check(b)) |
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71 | n/a | return PyLong_Type.tp_as_number->nb_or(a, b); |
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72 | n/a | return PyBool_FromLong((a == Py_True) | (b == Py_True)); |
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73 | n/a | } |
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74 | n/a | |
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75 | n/a | static PyObject * |
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76 | n/a | bool_xor(PyObject *a, PyObject *b) |
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77 | n/a | { |
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78 | n/a | if (!PyBool_Check(a) || !PyBool_Check(b)) |
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79 | n/a | return PyLong_Type.tp_as_number->nb_xor(a, b); |
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80 | n/a | return PyBool_FromLong((a == Py_True) ^ (b == Py_True)); |
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81 | n/a | } |
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82 | n/a | |
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83 | n/a | /* Doc string */ |
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84 | n/a | |
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85 | n/a | PyDoc_STRVAR(bool_doc, |
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86 | n/a | "bool(x) -> bool\n\ |
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87 | n/a | \n\ |
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88 | n/a | Returns True when the argument x is true, False otherwise.\n\ |
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89 | n/a | The builtins True and False are the only two instances of the class bool.\n\ |
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90 | n/a | The class bool is a subclass of the class int, and cannot be subclassed."); |
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91 | n/a | |
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92 | n/a | /* Arithmetic methods -- only so we can override &, |, ^. */ |
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93 | n/a | |
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94 | n/a | static PyNumberMethods bool_as_number = { |
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95 | n/a | 0, /* nb_add */ |
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96 | n/a | 0, /* nb_subtract */ |
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97 | n/a | 0, /* nb_multiply */ |
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98 | n/a | 0, /* nb_remainder */ |
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99 | n/a | 0, /* nb_divmod */ |
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100 | n/a | 0, /* nb_power */ |
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101 | n/a | 0, /* nb_negative */ |
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102 | n/a | 0, /* nb_positive */ |
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103 | n/a | 0, /* nb_absolute */ |
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104 | n/a | 0, /* nb_bool */ |
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105 | n/a | 0, /* nb_invert */ |
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106 | n/a | 0, /* nb_lshift */ |
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107 | n/a | 0, /* nb_rshift */ |
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108 | n/a | bool_and, /* nb_and */ |
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109 | n/a | bool_xor, /* nb_xor */ |
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110 | n/a | bool_or, /* nb_or */ |
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111 | n/a | 0, /* nb_int */ |
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112 | n/a | 0, /* nb_reserved */ |
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113 | n/a | 0, /* nb_float */ |
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114 | n/a | 0, /* nb_inplace_add */ |
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115 | n/a | 0, /* nb_inplace_subtract */ |
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116 | n/a | 0, /* nb_inplace_multiply */ |
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117 | n/a | 0, /* nb_inplace_remainder */ |
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118 | n/a | 0, /* nb_inplace_power */ |
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119 | n/a | 0, /* nb_inplace_lshift */ |
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120 | n/a | 0, /* nb_inplace_rshift */ |
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121 | n/a | 0, /* nb_inplace_and */ |
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122 | n/a | 0, /* nb_inplace_xor */ |
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123 | n/a | 0, /* nb_inplace_or */ |
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124 | n/a | 0, /* nb_floor_divide */ |
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125 | n/a | 0, /* nb_true_divide */ |
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126 | n/a | 0, /* nb_inplace_floor_divide */ |
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127 | n/a | 0, /* nb_inplace_true_divide */ |
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128 | n/a | 0, /* nb_index */ |
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129 | n/a | }; |
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130 | n/a | |
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131 | n/a | /* The type object for bool. Note that this cannot be subclassed! */ |
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132 | n/a | |
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133 | n/a | PyTypeObject PyBool_Type = { |
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134 | n/a | PyVarObject_HEAD_INIT(&PyType_Type, 0) |
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135 | n/a | "bool", |
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136 | n/a | sizeof(struct _longobject), |
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137 | n/a | 0, |
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138 | n/a | 0, /* tp_dealloc */ |
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139 | n/a | 0, /* tp_print */ |
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140 | n/a | 0, /* tp_getattr */ |
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141 | n/a | 0, /* tp_setattr */ |
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142 | n/a | 0, /* tp_reserved */ |
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143 | n/a | bool_repr, /* tp_repr */ |
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144 | n/a | &bool_as_number, /* tp_as_number */ |
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145 | n/a | 0, /* tp_as_sequence */ |
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146 | n/a | 0, /* tp_as_mapping */ |
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147 | n/a | 0, /* tp_hash */ |
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148 | n/a | 0, /* tp_call */ |
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149 | n/a | bool_repr, /* tp_str */ |
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150 | n/a | 0, /* tp_getattro */ |
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151 | n/a | 0, /* tp_setattro */ |
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152 | n/a | 0, /* tp_as_buffer */ |
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153 | n/a | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
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154 | n/a | bool_doc, /* tp_doc */ |
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155 | n/a | 0, /* tp_traverse */ |
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156 | n/a | 0, /* tp_clear */ |
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157 | n/a | 0, /* tp_richcompare */ |
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158 | n/a | 0, /* tp_weaklistoffset */ |
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159 | n/a | 0, /* tp_iter */ |
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160 | n/a | 0, /* tp_iternext */ |
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161 | n/a | 0, /* tp_methods */ |
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162 | n/a | 0, /* tp_members */ |
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163 | n/a | 0, /* tp_getset */ |
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164 | n/a | &PyLong_Type, /* tp_base */ |
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165 | n/a | 0, /* tp_dict */ |
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166 | n/a | 0, /* tp_descr_get */ |
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167 | n/a | 0, /* tp_descr_set */ |
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168 | n/a | 0, /* tp_dictoffset */ |
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169 | n/a | 0, /* tp_init */ |
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170 | n/a | 0, /* tp_alloc */ |
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171 | n/a | bool_new, /* tp_new */ |
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172 | n/a | }; |
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173 | n/a | |
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174 | n/a | /* The objects representing bool values False and True */ |
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175 | n/a | |
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176 | n/a | struct _longobject _Py_FalseStruct = { |
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177 | n/a | PyVarObject_HEAD_INIT(&PyBool_Type, 0) |
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178 | n/a | { 0 } |
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179 | n/a | }; |
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180 | n/a | |
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181 | n/a | struct _longobject _Py_TrueStruct = { |
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182 | n/a | PyVarObject_HEAD_INIT(&PyBool_Type, 1) |
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183 | n/a | { 1 } |
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184 | n/a | }; |
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