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Implement PEP 238 in its (almost) full glory. This introduces: - A new operator // that means floor division (the kind of division where 1/2 is 0). - The "future division" statement ("from __future__ import division) which changes the meaning of the / operator to implement "true division" (where 1/2 is 0.5). - New overloadable operators __truediv__ and __floordiv__. - New slots in the PyNumberMethods struct for true and floor division, new abstract APIs for them, new opcodes, and so on. I emphasize that without the future division statement, the semantics of / will remain unchanged until Python 3.0. Not yet implemented are warnings (default off) when / is used with int or long arguments. This has been on display since 7/31 as SF patch #443474. Flames to /dev/null.
author Guido van Rossum <guido@python.org>
date Wed, 08 Aug 2001 05:00:18 +0000
parents 09df3254b49d
children b7658e665d2e
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2 /* Interfaces to parse and execute pieces of python code */
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4 #ifndef Py_PYTHONRUN_H
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5 #define Py_PYTHONRUN_H
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6 #ifdef __cplusplus
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7 extern "C" {
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8 #endif
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10 /* These flags are named after the __future__ statements that introduced
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11 them. May not remain true for later additions, so fiddle this comment
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12 accordingly then. */
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13 #define PyCF_NESTED_SCOPES (0x00000001UL)
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14 #define PyCF_GENERATORS (0x00000002UL)
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15 #define PyCF_DIVISION (0x00000004UL)
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16 typedef struct {
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17 unsigned long cf_flags; /* bitmask of PyCF_xxx flags */
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18 } PyCompilerFlags;
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19
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20 DL_IMPORT(void) Py_SetProgramName(char *);
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21 DL_IMPORT(char *) Py_GetProgramName(void);
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23 DL_IMPORT(void) Py_SetPythonHome(char *);
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24 DL_IMPORT(char *) Py_GetPythonHome(void);
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26 DL_IMPORT(void) Py_Initialize(void);
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27 DL_IMPORT(void) Py_Finalize(void);
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28 DL_IMPORT(int) Py_IsInitialized(void);
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29 DL_IMPORT(PyThreadState *) Py_NewInterpreter(void);
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30 DL_IMPORT(void) Py_EndInterpreter(PyThreadState *);
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31
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32 DL_IMPORT(int) PyRun_AnyFile(FILE *, char *);
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33 DL_IMPORT(int) PyRun_AnyFileEx(FILE *, char *, int);
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35 DL_IMPORT(int) PyRun_AnyFileFlags(FILE *, char *, PyCompilerFlags *);
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36 DL_IMPORT(int) PyRun_AnyFileExFlags(FILE *, char *, int, PyCompilerFlags *);
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38 DL_IMPORT(int) PyRun_SimpleString(char *);
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39 DL_IMPORT(int) PyRun_SimpleFile(FILE *, char *);
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40 DL_IMPORT(int) PyRun_SimpleFileEx(FILE *, char *, int);
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41 DL_IMPORT(int) PyRun_SimpleFileExFlags(FILE *, char *, int, PyCompilerFlags *);
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42 DL_IMPORT(int) PyRun_InteractiveOne(FILE *, char *);
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43 DL_IMPORT(int) PyRun_InteractiveOneFlags(FILE *, char *, PyCompilerFlags *);
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44 DL_IMPORT(int) PyRun_InteractiveLoop(FILE *, char *);
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45 DL_IMPORT(int) PyRun_InteractiveLoopFlags(FILE *, char *, PyCompilerFlags *);
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47 DL_IMPORT(struct _node *) PyParser_SimpleParseString(char *, int);
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48 DL_IMPORT(struct _node *) PyParser_SimpleParseFile(FILE *, char *, int);
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49 DL_IMPORT(struct _node *) PyParser_SimpleParseStringFlags(char *, int, int);
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50 DL_IMPORT(struct _node *) PyParser_SimpleParseFileFlags(FILE *, char *,
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51 int, int);
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53 DL_IMPORT(PyObject *) PyRun_String(char *, int, PyObject *, PyObject *);
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54 DL_IMPORT(PyObject *) PyRun_File(FILE *, char *, int, PyObject *, PyObject *);
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55 DL_IMPORT(PyObject *) PyRun_FileEx(FILE *, char *, int,
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56 PyObject *, PyObject *, int);
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57 DL_IMPORT(PyObject *) PyRun_StringFlags(char *, int, PyObject *, PyObject *,
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58 PyCompilerFlags *);
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59 DL_IMPORT(PyObject *) PyRun_FileFlags(FILE *, char *, int, PyObject *,
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60 PyObject *, PyCompilerFlags *);
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61 DL_IMPORT(PyObject *) PyRun_FileExFlags(FILE *, char *, int, PyObject *,
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62 PyObject *, int, PyCompilerFlags *);
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64 DL_IMPORT(PyObject *) Py_CompileString(char *, char *, int);
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65 DL_IMPORT(PyObject *) Py_CompileStringFlags(char *, char *, int,
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66 PyCompilerFlags *);
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67 DL_IMPORT(struct symtable *) Py_SymtableString(char *, char *, int);
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69 DL_IMPORT(void) PyErr_Print(void);
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70 DL_IMPORT(void) PyErr_PrintEx(int);
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71 DL_IMPORT(void) PyErr_Display(PyObject *, PyObject *, PyObject *);
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73 DL_IMPORT(int) Py_AtExit(void (*func)(void));
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75 DL_IMPORT(void) Py_Exit(int);
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77 DL_IMPORT(int) Py_FdIsInteractive(FILE *, char *);
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79 /* In getpath.c */
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80 DL_IMPORT(char *) Py_GetProgramFullPath(void);
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81 DL_IMPORT(char *) Py_GetPrefix(void);
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82 DL_IMPORT(char *) Py_GetExecPrefix(void);
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83 DL_IMPORT(char *) Py_GetPath(void);
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84
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85 /* In their own files */
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86 DL_IMPORT(const char *) Py_GetVersion(void);
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87 DL_IMPORT(const char *) Py_GetPlatform(void);
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88 DL_IMPORT(const char *) Py_GetCopyright(void);
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89 DL_IMPORT(const char *) Py_GetCompiler(void);
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90 DL_IMPORT(const char *) Py_GetBuildInfo(void);
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91
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92 /* Internal -- various one-time initializations */
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93 DL_IMPORT(PyObject *) _PyBuiltin_Init(void);
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94 DL_IMPORT(PyObject *) _PySys_Init(void);
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95 DL_IMPORT(void) _PyImport_Init(void);
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96 DL_IMPORT(void) _PyExc_Init(void);
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98 /* Various internal finalizers */
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99 DL_IMPORT(void) _PyExc_Fini(void);
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100 DL_IMPORT(void) _PyImport_Fini(void);
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101 DL_IMPORT(void) PyMethod_Fini(void);
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102 DL_IMPORT(void) PyFrame_Fini(void);
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103 DL_IMPORT(void) PyCFunction_Fini(void);
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104 DL_IMPORT(void) PyTuple_Fini(void);
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105 DL_IMPORT(void) PyString_Fini(void);
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106 DL_IMPORT(void) PyInt_Fini(void);
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107 DL_IMPORT(void) PyFloat_Fini(void);
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108 DL_IMPORT(void) PyOS_FiniInterrupts(void);
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109
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110 /* Stuff with no proper home (yet) */
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111 DL_IMPORT(char *) PyOS_Readline(char *);
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112 extern DL_IMPORT(int) (*PyOS_InputHook)(void);
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113 extern DL_IMPORT(char) *(*PyOS_ReadlineFunctionPointer)(char *);
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114
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115 /* Stack size, in "pointers" (so we get extra safety margins
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116 on 64-bit platforms). On a 32-bit platform, this translates
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117 to a 8k margin. */
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118 #define PYOS_STACK_MARGIN 2048
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119
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120 #if defined(WIN32) && !defined(MS_WIN64) && defined(_MSC_VER)
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121 /* Enable stack checking under Microsoft C */
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122 #define USE_STACKCHECK
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123 #endif
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124
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125 #ifdef USE_STACKCHECK
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126 /* Check that we aren't overflowing our stack */
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127 DL_IMPORT(int) PyOS_CheckStack(void);
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128 #endif
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129
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130 /* Signals */
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131 typedef void (*PyOS_sighandler_t)(int);
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132 DL_IMPORT(PyOS_sighandler_t) PyOS_getsig(int);
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133 DL_IMPORT(PyOS_sighandler_t) PyOS_setsig(int, PyOS_sighandler_t);
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134
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135
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136 #ifdef __cplusplus
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137 }
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138 #endif
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139 #endif /* !Py_PYTHONRUN_H */