Mercurial > cpython-lru_cache-weakref

annotate Objects/funcobject.c @ 17581:c1937faabb23 2.1

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Added support for optional explanation parameter to the \versionadded macro. Refactored do_cmd_versionadded() and do_cmd_versionchanged() to do most of the work in a helper function, with the do_cmd_*() wrappers just supplying a portion of the replacement text.
author Fred Drake <fdrake@acm.org>
date Wed, 18 Apr 2001 17:29:14 +0000
parents 962196ce7231
children d7d05103c023
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145
853b736a6a9e Added copyright notice.
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1
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2 /* Function object implementation */
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3
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4 #include "Python.h"
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5 #include "compile.h"
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6 #include "structmember.h"
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7
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8 PyObject *
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9 PyFunction_New(PyObject *code, PyObject *globals)
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10 {
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11 PyFunctionObject *op = PyObject_NEW(PyFunctionObject,
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12 &PyFunction_Type);
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13 if (op != NULL) {
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14 PyObject *doc;
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15 PyObject *consts;
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16 op->func_weakreflist = NULL;
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17 Py_INCREF(code);
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18 op->func_code = code;
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19 Py_INCREF(globals);
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20 op->func_globals = globals;
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21 op->func_name = ((PyCodeObject *)code)->co_name;
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22 Py_INCREF(op->func_name);
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23 op->func_defaults = NULL; /* No default arguments */
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24 op->func_closure = NULL;
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25 consts = ((PyCodeObject *)code)->co_consts;
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26 if (PyTuple_Size(consts) >= 1) {
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27 doc = PyTuple_GetItem(consts, 0);
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28 if (!PyString_Check(doc) && !PyUnicode_Check(doc))
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29 doc = Py_None;
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30 }
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31 else
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32 doc = Py_None;
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33 Py_INCREF(doc);
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34 op->func_doc = doc;
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35 op->func_dict = NULL;
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36 }
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37 else
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38 return NULL;
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39 PyObject_GC_Init(op);
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40 return (PyObject *)op;
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41 }
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42
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43 PyObject *
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44 PyFunction_GetCode(PyObject *op)
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45 {
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46 if (!PyFunction_Check(op)) {
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47 PyErr_BadInternalCall();
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48 return NULL;
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49 }
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50 return ((PyFunctionObject *) op) -> func_code;
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51 }
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52
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53 PyObject *
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54 PyFunction_GetGlobals(PyObject *op)
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55 {
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56 if (!PyFunction_Check(op)) {
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57 PyErr_BadInternalCall();
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58 return NULL;
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59 }
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60 return ((PyFunctionObject *) op) -> func_globals;
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61 }
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62
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63 PyObject *
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64 PyFunction_GetDefaults(PyObject *op)
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65 {
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66 if (!PyFunction_Check(op)) {
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67 PyErr_BadInternalCall();
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68 return NULL;
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69 }
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70 return ((PyFunctionObject *) op) -> func_defaults;
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71 }
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72
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73 int
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74 PyFunction_SetDefaults(PyObject *op, PyObject *defaults)
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75 {
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76 if (!PyFunction_Check(op)) {
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77 PyErr_BadInternalCall();
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78 return -1;
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79 }
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80 if (defaults == Py_None)
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81 defaults = NULL;
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82 else if (PyTuple_Check(defaults)) {
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83 Py_XINCREF(defaults);
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84 }
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85 else {
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86 PyErr_SetString(PyExc_SystemError, "non-tuple default args");
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87 return -1;
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88 }
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89 Py_XDECREF(((PyFunctionObject *) op) -> func_defaults);
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90 ((PyFunctionObject *) op) -> func_defaults = defaults;
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91 return 0;
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92 }
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93
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94 PyObject *
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95 PyFunction_GetClosure(PyObject *op)
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96 {
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97 if (!PyFunction_Check(op)) {
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98 PyErr_BadInternalCall();
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99 return NULL;
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100 }
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101 return ((PyFunctionObject *) op) -> func_closure;
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102 }
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103
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104 int
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105 PyFunction_SetClosure(PyObject *op, PyObject *closure)
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106 {
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107 if (!PyFunction_Check(op)) {
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108 PyErr_BadInternalCall();
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109 return -1;
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110 }
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111 if (closure == Py_None)
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112 closure = NULL;
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113 else if (PyTuple_Check(closure)) {
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114 Py_XINCREF(closure);
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115 }
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116 else {
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117 PyErr_SetString(PyExc_SystemError, "non-tuple closure");
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118 return -1;
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119 }
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120 Py_XDECREF(((PyFunctionObject *) op) -> func_closure);
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121 ((PyFunctionObject *) op) -> func_closure = closure;
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122 return 0;
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123 }
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124
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125 /* Methods */
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126
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127 #define OFF(x) offsetof(PyFunctionObject, x)
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128
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129 static struct memberlist func_memberlist[] = {
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130 {"func_code", T_OBJECT, OFF(func_code)},
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131 {"func_globals", T_OBJECT, OFF(func_globals), READONLY},
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132 {"func_name", T_OBJECT, OFF(func_name), READONLY},
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133 {"__name__", T_OBJECT, OFF(func_name), READONLY},
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134 {"func_closure", T_OBJECT, OFF(func_closure), READONLY},
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135 {"func_defaults", T_OBJECT, OFF(func_defaults)},
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136 {"func_doc", T_OBJECT, OFF(func_doc)},
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137 {"__doc__", T_OBJECT, OFF(func_doc)},
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138 {"func_dict", T_OBJECT, OFF(func_dict)},
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139 {"__dict__", T_OBJECT, OFF(func_dict)},
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140 {NULL} /* Sentinel */
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141 };
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142
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143 static PyObject *
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144 func_getattro(PyFunctionObject *op, PyObject *name)
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145 {
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146 PyObject *rtn;
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147 char *sname = PyString_AsString(name);
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148
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diff changeset
149 if (sname[0] != '_' && PyEval_GetRestricted()) {
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150 PyErr_SetString(PyExc_RuntimeError,
2105
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diff changeset
151 "function attributes not accessible in restricted mode");
ea7b2bf0b521 add restrictions in restricted mode
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diff changeset
152 return NULL;
ea7b2bf0b521 add restrictions in restricted mode
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parents: 2082
diff changeset
153 }
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diff changeset
154
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
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diff changeset
155 /* no API for PyMember_HasAttr() */
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diff changeset
156 rtn = PyMember_Get((char *)op, func_memberlist, sname);
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diff changeset
157
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diff changeset
158 if (rtn == NULL && PyErr_ExceptionMatches(PyExc_AttributeError)) {
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diff changeset
159 PyErr_Clear();
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parents: 14375
diff changeset
160 if (op->func_dict != NULL) {
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161 rtn = PyDict_GetItem(op->func_dict, name);
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diff changeset
162 Py_XINCREF(rtn);
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diff changeset
163 }
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diff changeset
164 if (rtn == NULL)
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165 PyErr_SetObject(PyExc_AttributeError, name);
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166 }
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167 return rtn;
86
a6934380c6e7 "Compiling" version
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diff changeset
168 }
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diff changeset
169
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170 static int
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171 func_setattro(PyFunctionObject *op, PyObject *name, PyObject *value)
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172 {
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173 int rtn;
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174 char *sname = PyString_AsString(name);
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175
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176 if (PyEval_GetRestricted()) {
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177 PyErr_SetString(PyExc_RuntimeError,
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178 "function attributes not settable in restricted mode");
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179 return -1;
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180 }
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181 if (strcmp(sname, "func_code") == 0) {
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182 /* not legal to del f.func_code or to set it to anything
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183 * other than a code object.
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184 */
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185 if (value == NULL || !PyCode_Check(value)) {
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186 PyErr_SetString(
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187 PyExc_TypeError,
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188 "func_code must be set to a code object");
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189 return -1;
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190 }
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191 }
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192 else if (strcmp(sname, "func_defaults") == 0) {
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193 /* legal to del f.func_defaults. Can only set
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194 * func_defaults to NULL or a tuple.
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195 */
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196 if (value == Py_None)
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197 value = NULL;
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198 if (value != NULL && !PyTuple_Check(value)) {
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diff changeset
199 PyErr_SetString(
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diff changeset
200 PyExc_TypeError,
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201 "func_defaults must be set to a tuple object");
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202 return -1;
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203 }
16042
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204 }
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205 else if (!strcmp(sname, "func_dict") || !strcmp(sname, "__dict__")) {
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206 /* legal to del f.func_dict. Can only set func_dict to
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207 * NULL or a dictionary.
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208 */
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209 if (value == Py_None)
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210 value = NULL;
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diff changeset
211 if (value != NULL && !PyDict_Check(value)) {
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212 PyErr_SetString(
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213 PyExc_TypeError,
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214 "func_dict must be set to a dict object");
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215 return -1;
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216 }
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217 }
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218
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diff changeset
219 rtn = PyMember_Set((char *)op, func_memberlist, sname, value);
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220 if (rtn < 0 && PyErr_ExceptionMatches(PyExc_AttributeError)) {
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221 PyErr_Clear();
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diff changeset
222 if (op->func_dict == NULL) {
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223 /* don't create the dict if we're deleting an
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diff changeset
224 * attribute. In that case, we know we'll get an
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diff changeset
225 * AttributeError.
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226 */
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diff changeset
227 if (value == NULL) {
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228 PyErr_SetString(PyExc_AttributeError, sname);
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diff changeset
229 return -1;
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diff changeset
230 }
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diff changeset
231 op->func_dict = PyDict_New();
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diff changeset
232 if (op->func_dict == NULL)
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diff changeset
233 return -1;
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diff changeset
234 }
16042
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235 if (value == NULL)
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diff changeset
236 rtn = PyDict_DelItem(op->func_dict, name);
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diff changeset
237 else
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diff changeset
238 rtn = PyDict_SetItem(op->func_dict, name, value);
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239 /* transform KeyError into AttributeError */
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diff changeset
240 if (rtn < 0 && PyErr_ExceptionMatches(PyExc_KeyError))
78bd97d8413c Application and elaboration of patch #103305 to fix core dumps when
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diff changeset
241 PyErr_SetString(PyExc_AttributeError, sname);
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242 }
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243 return rtn;
8407
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244 }
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245
6
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246 static void
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Fred Drake <fdrake@acm.org>
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247 func_dealloc(PyFunctionObject *op)
6
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248 {
17170
962196ce7231 Add support for weak references to the function and method types.
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diff changeset
249 PyObject_ClearWeakRefs((PyObject *) op);
13183
54bffdddc0ef final patches from Neil Schemenauer for garbage collection
Jeremy Hylton <jeremy@alum.mit.edu>
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diff changeset
250 PyObject_GC_Fini(op);
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251 Py_DECREF(op->func_code);
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252 Py_DECREF(op->func_globals);
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253 Py_DECREF(op->func_name);
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254 Py_XDECREF(op->func_defaults);
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255 Py_XDECREF(op->func_doc);
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diff changeset
256 Py_XDECREF(op->func_dict);
16891
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
257 Py_XDECREF(op->func_closure);
13265
e8bb0d536633 Neil Schemenauer: small fixes for GC
Guido van Rossum <guido@python.org>
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diff changeset
258 op = (PyFunctionObject *) PyObject_AS_GC(op);
12576
1c7c2dd1beb1 Vladimir Marangozov's long-awaited malloc restructuring.
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parents: 12512
diff changeset
259 PyObject_DEL(op);
6
fc6fcd7df4f7 Initial revision
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260 }
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diff changeset
261
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diff changeset
262 static PyObject*
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parents: 13265
diff changeset
263 func_repr(PyFunctionObject *op)
1257
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
264 {
1cabc2b6c970 * Changed all copyright messages to include 1993.
Guido van Rossum <guido@python.org>
parents: 795
diff changeset
265 char buf[140];
5396
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diff changeset
266 if (op->func_name == Py_None)
13210
ff243b0f16ee Trent Mick <trentm@activestate.com>:
Fred Drake <fdrake@acm.org>
parents: 13183
diff changeset
267 sprintf(buf, "<anonymous function at %p>", op);
1415
06570429f062 * import.c (get_module): pass .py filename to parse_file, not .pyc filename!
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parents: 1399
diff changeset
268 else
13210
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parents: 13183
diff changeset
269 sprintf(buf, "<function %.100s at %p>",
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270 PyString_AsString(op->func_name),
13210
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parents: 13183
diff changeset
271 op);
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diff changeset
272 return PyString_FromString(buf);
1257
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parents: 795
diff changeset
273 }
1cabc2b6c970 * Changed all copyright messages to include 1993.
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parents: 795
diff changeset
274
1399
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
275 static int
12990
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
276 func_traverse(PyFunctionObject *f, visitproc visit, void *arg)
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diff changeset
277 {
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
278 int err;
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
279 if (f->func_code) {
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
280 err = visit(f->func_code, arg);
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
281 if (err)
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
282 return err;
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283 }
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284 if (f->func_globals) {
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285 err = visit(f->func_globals, arg);
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286 if (err)
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287 return err;
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288 }
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289 if (f->func_defaults) {
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290 err = visit(f->func_defaults, arg);
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291 if (err)
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292 return err;
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293 }
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294 if (f->func_doc) {
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295 err = visit(f->func_doc, arg);
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diff changeset
296 if (err)
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297 return err;
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parents: 12576
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298 }
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299 if (f->func_name) {
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300 err = visit(f->func_name, arg);
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diff changeset
301 if (err)
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diff changeset
302 return err;
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parents: 12576
diff changeset
303 }
15894
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
304 if (f->func_dict) {
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
305 err = visit(f->func_dict, arg);
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
306 if (err)
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
307 return err;
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
308 }
16891
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
309 if (f->func_closure) {
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
310 err = visit(f->func_closure, arg);
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
311 if (err)
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
312 return err;
806c6ae23103 Visit the closure during traversal and XDECREF it on during deallocation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 16825
diff changeset
313 }
12990
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diff changeset
314 return 0;
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parents: 12576
diff changeset
315 }
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parents: 12576
diff changeset
316
5396
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
317 PyTypeObject PyFunction_Type = {
d1447950fa04 Quickly renamed the last directory.
Guido van Rossum <guido@python.org>
parents: 4503
diff changeset
318 PyObject_HEAD_INIT(&PyType_Type)
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
319 0,
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
320 "function",
13183
54bffdddc0ef final patches from Neil Schemenauer for garbage collection
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 13141
diff changeset
321 sizeof(PyFunctionObject) + PyGC_HEAD_SIZE,
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
322 0,
1848
b724599401ff Merge back to main trunk
Guido van Rossum <guido@python.org>
parents: 1415
diff changeset
323 (destructor)func_dealloc, /*tp_dealloc*/
84
a79cbb2655ba Function objects no longer contain a parse tree node, but intermediate
Guido van Rossum <guido@python.org>
parents: 27
diff changeset
324 0, /*tp_print*/
15894
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
325 0, /*tp_getattr*/
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
326 0, /*tp_setattr*/
16328
abd383f1905c The one thing I love more then writing code is deleting code.
Moshe Zadka <moshez@math.huji.ac.il>
parents: 16257
diff changeset
327 0, /*tp_compare*/
1848
b724599401ff Merge back to main trunk
Guido van Rossum <guido@python.org>
parents: 1415
diff changeset
328 (reprfunc)func_repr, /*tp_repr*/
1399
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
329 0, /*tp_as_number*/
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
330 0, /*tp_as_sequence*/
cc172ce05561 Added compare operations for functions and code objects.
Guido van Rossum <guido@python.org>
parents: 1288
diff changeset
331 0, /*tp_as_mapping*/
17170
962196ce7231 Add support for weak references to the function and method types.
Fred Drake <fdrake@acm.org>
parents: 16891
diff changeset
332 0, /*tp_hash*/
12990
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
333 0, /*tp_call*/
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
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parents: 12576
diff changeset
334 0, /*tp_str*/
15894
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
335 (getattrofunc)func_getattro, /*tp_getattro*/
1c6b0d3a58ea Committing PEP 232, function attribute feature, approved by Guido.
Barry Warsaw <barry@python.org>
parents: 14375
diff changeset
336 (setattrofunc)func_setattro, /*tp_setattro*/
12990
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
337 0, /* tp_as_buffer */
17170
962196ce7231 Add support for weak references to the function and method types.
Fred Drake <fdrake@acm.org>
parents: 16891
diff changeset
338 Py_TPFLAGS_DEFAULT | Py_TPFLAGS_GC | Py_TPFLAGS_HAVE_WEAKREFS,
12990
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
339 0, /* tp_doc */
e615596c5c47 Round 1 of Neil Schemenauer's GC patches:
Jeremy Hylton <jeremy@alum.mit.edu>
parents: 12576
diff changeset
340 (traverseproc)func_traverse, /* tp_traverse */
17170
962196ce7231 Add support for weak references to the function and method types.
Fred Drake <fdrake@acm.org>
parents: 16891
diff changeset
341 0, /* tp_clear */
962196ce7231 Add support for weak references to the function and method types.
Fred Drake <fdrake@acm.org>
parents: 16891
diff changeset
342 0, /* tp_richcompare */
962196ce7231 Add support for weak references to the function and method types.
Fred Drake <fdrake@acm.org>
parents: 16891
diff changeset
343 offsetof(PyFunctionObject, func_weakreflist), /* tp_weaklistoffset */
6
fc6fcd7df4f7 Initial revision
Guido van Rossum <guido@python.org>
parents:
diff changeset
344 };