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annotate Python/future.c @ 42110:e4f649c4f457

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Merged revisions 55962-56019 via svnmerge from svn+ssh://pythondev@svn.python.org/python/branches/p3yk ................ r55985 | neal.norwitz | 2007-06-14 20:14:38 -0700 (Thu, 14 Jun 2007) | 2 lines All these tests have been flaky wrt reporting leaks. Disable them. ................ r56003 | neal.norwitz | 2007-06-15 19:41:09 -0700 (Fri, 15 Jun 2007) | 1 line Fix typo (certain). ................ r56004 | neal.norwitz | 2007-06-15 20:54:18 -0700 (Fri, 15 Jun 2007) | 4 lines Fix it so test_os no longer reports ref leaks by clearing all the caches the ABCMeta stores on the class. Apply this to all the ABC collections as well as the class of os.environ which inherits from an ABC collection. ................ r56013 | neal.norwitz | 2007-06-17 19:56:31 -0700 (Sun, 17 Jun 2007) | 4 lines This should make it a little easier when adding new collections which use ABCs. The new subclass won't need to be listed in regrtest. It will be even better when Guido adds weakrefs. :-) ................ r56014 | martin.v.loewis | 2007-06-17 20:15:51 -0700 (Sun, 17 Jun 2007) | 1 line Drop inline, as it's not support by VS 2003. ................ r56015 | martin.v.loewis | 2007-06-17 20:17:19 -0700 (Sun, 17 Jun 2007) | 1 line Expect long objects for DWORD values. ................ r56016 | martin.v.loewis | 2007-06-17 20:18:01 -0700 (Sun, 17 Jun 2007) | 1 line Drop modules that have been deleted. ................ r56017 | martin.v.loewis | 2007-06-17 20:18:55 -0700 (Sun, 17 Jun 2007) | 1 line Bump DLL version number to 30. ................ r56018 | neal.norwitz | 2007-06-17 20:55:43 -0700 (Sun, 17 Jun 2007) | 62 lines Merged revisions 55951-56013 via svnmerge from svn+ssh://pythondev@svn.python.org/python/trunk ........ r55956 | thomas.heller | 2007-06-13 00:07:03 -0700 (Wed, 13 Jun 2007) | 2 lines Do not hardcode the buildbot's directory name. ........ r55957 | thomas.heller | 2007-06-13 00:07:41 -0700 (Wed, 13 Jun 2007) | 2 lines Notes about building tcl/tk for windows/AMD64. ........ r55958 | thomas.heller | 2007-06-13 00:54:57 -0700 (Wed, 13 Jun 2007) | 2 lines Build bzip2. ........ r55962 | walter.doerwald | 2007-06-13 09:57:12 -0700 (Wed, 13 Jun 2007) | 8 lines Add T_PYSSIZET in structmember.h: This can be used for Py_ssize_t members. Simplify the implementation of UnicodeError objects: start and end attributes are now stored directly as Py_ssize_t members, which simplifies various get and set functions. ........ r55975 | martin.v.loewis | 2007-06-14 13:46:25 -0700 (Thu, 14 Jun 2007) | 3 lines Patch #1734014: Use _I64_MAX instead of LLONG_MAX. Will backport to 2.5. ........ r55984 | neal.norwitz | 2007-06-14 20:11:41 -0700 (Thu, 14 Jun 2007) | 4 lines urllib2_localnet says it leaks probably due to threads. So ignore it. popen2 is also complaining probably for similar reasons. make install always reports failure, so don't mail in this case. ........ r56001 | andrew.kuchling | 2007-06-15 15:43:03 -0700 (Fri, 15 Jun 2007) | 1 line Add a word ........ r56005 | martin.v.loewis | 2007-06-16 03:08:43 -0700 (Sat, 16 Jun 2007) | 2 lines Mention Senthil Kumaran. ........ r56006 | georg.brandl | 2007-06-16 10:10:12 -0700 (Sat, 16 Jun 2007) | 2 lines Add missing \versionadded. ........ r56009 | neal.norwitz | 2007-06-17 11:48:32 -0700 (Sun, 17 Jun 2007) | 1 line SF #1738670, make example in doc work ........ r56011 | neal.norwitz | 2007-06-17 19:46:36 -0700 (Sun, 17 Jun 2007) | 1 line SF #1738754, remove extra backslash in string ........ r56012 | neal.norwitz | 2007-06-17 19:50:15 -0700 (Sun, 17 Jun 2007) | 1 line Revert last change for SF #1738754, there's no print in there. ........ ................
author Guido van Rossum <guido@python.org>
date Mon, 18 Jun 2007 17:58:50 +0000
parents cd125fe83051
children 302aeee32da8
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1 #include "Python.h"
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2 #include "Python-ast.h"
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3 #include "node.h"
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4 #include "token.h"
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5 #include "graminit.h"
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6 #include "code.h"
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7 #include "compile.h"
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8 #include "symtable.h"
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9
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10 #define UNDEFINED_FUTURE_FEATURE "future feature %.100s is not defined"
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11
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12 static int
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13 future_check_features(PyFutureFeatures *ff, stmt_ty s, const char *filename)
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14 {
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15 int i;
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16 asdl_seq *names;
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17
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18 assert(s->kind == ImportFrom_kind);
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19
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20 names = s->v.ImportFrom.names;
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21 for (i = 0; i < asdl_seq_LEN(names); i++) {
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22 alias_ty name = (alias_ty)asdl_seq_GET(names, i);
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23 const char *feature = PyString_AsString(name->name);
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24 if (!feature)
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25 return 0;
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26 if (strcmp(feature, FUTURE_NESTED_SCOPES) == 0) {
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27 continue;
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28 } else if (strcmp(feature, FUTURE_GENERATORS) == 0) {
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29 continue;
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30 } else if (strcmp(feature, FUTURE_DIVISION) == 0) {
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31 continue;
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32 } else if (strcmp(feature, FUTURE_ABSOLUTE_IMPORT) == 0) {
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33 continue;
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34 } else if (strcmp(feature, FUTURE_WITH_STATEMENT) == 0) {
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35 continue;
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36 } else if (strcmp(feature, "braces") == 0) {
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37 PyErr_SetString(PyExc_SyntaxError,
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38 "not a chance");
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39 PyErr_SyntaxLocation(filename, s->lineno);
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40 return 0;
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41 } else {
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42 PyErr_Format(PyExc_SyntaxError,
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43 UNDEFINED_FUTURE_FEATURE, feature);
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44 PyErr_SyntaxLocation(filename, s->lineno);
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45 return 0;
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46 }
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47 }
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48 return 1;
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49 }
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50
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51 static int
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52 future_parse(PyFutureFeatures *ff, mod_ty mod, const char *filename)
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53 {
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54 int i, found_docstring = 0, done = 0, prev_line = 0;
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55
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56 static PyObject *future;
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57 if (!future) {
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58 future = PyUnicode_InternFromString("__future__");
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59 if (!future)
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60 return 0;
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61 }
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62
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63 if (!(mod->kind == Module_kind || mod->kind == Interactive_kind))
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64 return 1;
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65
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66 /* A subsequent pass will detect future imports that don't
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67 appear at the beginning of the file. There's one case,
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68 however, that is easier to handl here: A series of imports
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69 joined by semi-colons, where the first import is a future
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70 statement but some subsequent import has the future form
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71 but is preceded by a regular import.
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72 */
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73
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74
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75 for (i = 0; i < asdl_seq_LEN(mod->v.Module.body); i++) {
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76 stmt_ty s = (stmt_ty)asdl_seq_GET(mod->v.Module.body, i);
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77
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78 if (done && s->lineno > prev_line)
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79 return 1;
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80 prev_line = s->lineno;
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81
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82 /* The tests below will return from this function unless it is
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83 still possible to find a future statement. The only things
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84 that can precede a future statement are another future
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85 statement and a doc string.
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86 */
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87
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88 if (s->kind == ImportFrom_kind) {
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89 if (s->v.ImportFrom.module == future) {
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90 if (done) {
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91 PyErr_SetString(PyExc_SyntaxError,
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92 ERR_LATE_FUTURE);
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93 PyErr_SyntaxLocation(filename,
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94 s->lineno);
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95 return 0;
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96 }
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97 if (!future_check_features(ff, s, filename))
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98 return 0;
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99 ff->ff_lineno = s->lineno;
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100 }
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101 else
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102 done = 1;
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103 }
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104 else if (s->kind == Expr_kind && !found_docstring) {
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105 expr_ty e = s->v.Expr.value;
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106 if (e->kind != Str_kind)
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107 done = 1;
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108 else
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109 found_docstring = 1;
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110 }
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111 else
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112 done = 1;
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113 }
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114 return 1;
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115 }
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116
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117
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118 PyFutureFeatures *
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119 PyFuture_FromAST(mod_ty mod, const char *filename)
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120 {
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121 PyFutureFeatures *ff;
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122
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123 ff = (PyFutureFeatures *)PyObject_Malloc(sizeof(PyFutureFeatures));
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124 if (ff == NULL) {
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125 PyErr_NoMemory();
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126 return NULL;
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127 }
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128 ff->ff_features = 0;
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129 ff->ff_lineno = -1;
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130
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131 if (!future_parse(ff, mod, filename)) {
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132 PyObject_Free(ff);
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133 return NULL;
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134 }
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135 return ff;
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136 }