Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1 | /* parsermodule.c |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 3 | * Copyright 1995-1996 by Fred L. Drake, Jr. and Virginia Polytechnic |
| 4 | * Institute and State University, Blacksburg, Virginia, USA. |
| 5 | * Portions copyright 1991-1995 by Stichting Mathematisch Centrum, |
| 6 | * Amsterdam, The Netherlands. Copying is permitted under the terms |
| 7 | * associated with the main Python distribution, with the additional |
| 8 | * restriction that this additional notice be included and maintained |
| 9 | * on all distributed copies. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 10 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 11 | * This module serves to replace the original parser module written |
| 12 | * by Guido. The functionality is not matched precisely, but the |
| 13 | * original may be implemented on top of this. This is desirable |
| 14 | * since the source of the text to be parsed is now divorced from |
| 15 | * this interface. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 16 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 17 | * Unlike the prior interface, the ability to give a parse tree |
| 18 | * produced by Python code as a tuple to the compiler is enabled by |
| 19 | * this module. See the documentation for more details. |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 20 | * |
| 21 | * I've added some annotations that help with the lint code-checking |
| 22 | * program, but they're not complete by a long shot. The real errors |
| 23 | * that lint detects are gone, but there are still warnings with |
| 24 | * Py_[X]DECREF() and Py_[X]INCREF() macros. The lint annotations |
| 25 | * look like "NOTE(...)". |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 26 | */ |
| 27 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 28 | #include "Python.h" /* general Python API */ |
| 29 | #include "graminit.h" /* symbols defined in the grammar */ |
| 30 | #include "node.h" /* internal parser structure */ |
| 31 | #include "token.h" /* token definitions */ |
| 32 | /* ISTERMINAL() / ISNONTERMINAL() */ |
| 33 | #include "compile.h" /* PyNode_Compile() */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 34 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 35 | #ifdef lint |
| 36 | #include <note.h> |
| 37 | #else |
| 38 | #define NOTE(x) |
| 39 | #endif |
| 40 | |
Guido van Rossum | 19efc5f | 1998-04-28 16:10:19 +0000 | [diff] [blame] | 41 | #ifdef macintosh |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 42 | char *strdup(char *); |
Guido van Rossum | 19efc5f | 1998-04-28 16:10:19 +0000 | [diff] [blame] | 43 | #endif |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 44 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 45 | /* String constants used to initialize module attributes. |
| 46 | * |
| 47 | */ |
| 48 | static char* |
| 49 | parser_copyright_string |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 50 | = "Copyright 1995-1996 by Virginia Polytechnic Institute & State\n\ |
| 51 | University, Blacksburg, Virginia, USA, and Fred L. Drake, Jr., Reston,\n\ |
| 52 | Virginia, USA. Portions copyright 1991-1995 by Stichting Mathematisch\n\ |
| 53 | Centrum, Amsterdam, The Netherlands."; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 54 | |
| 55 | |
| 56 | static char* |
| 57 | parser_doc_string |
| 58 | = "This is an interface to Python's internal parser."; |
| 59 | |
| 60 | static char* |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 61 | parser_version_string = "0.4"; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 62 | |
| 63 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 64 | typedef PyObject* (*SeqMaker) (int length); |
| 65 | typedef int (*SeqInserter) (PyObject* sequence, |
| 66 | int index, |
| 67 | PyObject* element); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 68 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 69 | /* The function below is copyrigthed by Stichting Mathematisch Centrum. The |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 70 | * original copyright statement is included below, and continues to apply |
| 71 | * in full to the function immediately following. All other material is |
| 72 | * original, copyrighted by Fred L. Drake, Jr. and Virginia Polytechnic |
| 73 | * Institute and State University. Changes were made to comply with the |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 74 | * new naming conventions. Added arguments to provide support for creating |
| 75 | * lists as well as tuples, and optionally including the line numbers. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 76 | */ |
| 77 | |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 78 | /*********************************************************** |
Guido van Rossum | 524b588 | 1995-01-04 19:10:35 +0000 | [diff] [blame] | 79 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 80 | The Netherlands. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 81 | |
| 82 | All Rights Reserved |
| 83 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame^] | 84 | Copyright (c) 2000, BeOpen.com. |
| 85 | Copyright (c) 1995-2000, Corporation for National Research Initiatives. |
| 86 | Copyright (c) 1990-1995, Stichting Mathematisch Centrum. |
| 87 | All rights reserved. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 88 | |
Guido van Rossum | fd71b9e | 2000-06-30 23:50:40 +0000 | [diff] [blame^] | 89 | See the file "Misc/COPYRIGHT" for information on usage and |
| 90 | redistribution of this file, and for a DISCLAIMER OF ALL WARRANTIES. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 91 | |
| 92 | ******************************************************************/ |
| 93 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 94 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 95 | node2tuple(node *n, /* node to convert */ |
| 96 | SeqMaker mkseq, /* create sequence */ |
| 97 | SeqInserter addelem, /* func. to add elem. in seq. */ |
| 98 | int lineno) /* include line numbers? */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 99 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 100 | if (n == NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 101 | Py_INCREF(Py_None); |
| 102 | return (Py_None); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 103 | } |
| 104 | if (ISNONTERMINAL(TYPE(n))) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 105 | int i; |
| 106 | PyObject *v; |
| 107 | PyObject *w; |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 108 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 109 | v = mkseq(1 + NCH(n)); |
| 110 | if (v == NULL) |
| 111 | return (v); |
| 112 | w = PyInt_FromLong(TYPE(n)); |
| 113 | if (w == NULL) { |
| 114 | Py_DECREF(v); |
| 115 | return ((PyObject*) NULL); |
| 116 | } |
| 117 | (void) addelem(v, 0, w); |
| 118 | for (i = 0; i < NCH(n); i++) { |
| 119 | w = node2tuple(CHILD(n, i), mkseq, addelem, lineno); |
| 120 | if (w == NULL) { |
| 121 | Py_DECREF(v); |
| 122 | return ((PyObject*) NULL); |
| 123 | } |
| 124 | (void) addelem(v, i+1, w); |
| 125 | } |
| 126 | return (v); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 127 | } |
| 128 | else if (ISTERMINAL(TYPE(n))) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 129 | PyObject *result = mkseq(2 + lineno); |
| 130 | if (result != NULL) { |
| 131 | (void) addelem(result, 0, PyInt_FromLong(TYPE(n))); |
| 132 | (void) addelem(result, 1, PyString_FromString(STR(n))); |
| 133 | if (lineno == 1) |
| 134 | (void) addelem(result, 2, PyInt_FromLong(n->n_lineno)); |
| 135 | } |
| 136 | return (result); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 137 | } |
| 138 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 139 | PyErr_SetString(PyExc_SystemError, |
| 140 | "unrecognized parse tree node type"); |
| 141 | return ((PyObject*) NULL); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 142 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 143 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 144 | /* |
| 145 | * End of material copyrighted by Stichting Mathematisch Centrum. |
| 146 | */ |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 147 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 148 | |
| 149 | |
| 150 | /* There are two types of intermediate objects we're interested in: |
| 151 | * 'eval' and 'exec' types. These constants can be used in the ast_type |
| 152 | * field of the object type to identify which any given object represents. |
| 153 | * These should probably go in an external header to allow other extensions |
| 154 | * to use them, but then, we really should be using C++ too. ;-) |
| 155 | * |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 156 | * The PyAST_FRAGMENT type is not currently supported. Maybe not useful? |
| 157 | * Haven't decided yet. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 158 | */ |
| 159 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 160 | #define PyAST_EXPR 1 |
| 161 | #define PyAST_SUITE 2 |
| 162 | #define PyAST_FRAGMENT 3 |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 163 | |
| 164 | |
| 165 | /* These are the internal objects and definitions required to implement the |
| 166 | * AST type. Most of the internal names are more reminiscent of the 'old' |
| 167 | * naming style, but the code uses the new naming convention. |
| 168 | */ |
| 169 | |
| 170 | static PyObject* |
| 171 | parser_error = 0; |
| 172 | |
| 173 | |
| 174 | typedef struct _PyAST_Object { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 175 | PyObject_HEAD /* standard object header */ |
| 176 | node* ast_node; /* the node* returned by the parser */ |
| 177 | int ast_type; /* EXPR or SUITE ? */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 178 | } PyAST_Object; |
| 179 | |
| 180 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 181 | staticforward void |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 182 | parser_free(PyAST_Object *ast); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 183 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 184 | staticforward int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 185 | parser_compare(PyAST_Object *left, PyAST_Object *right); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 186 | |
| 187 | staticforward PyObject * |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 188 | parser_getattr(PyObject *self, char *name); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 189 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 190 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 191 | static |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 192 | PyTypeObject PyAST_Type = { |
Guido van Rossum | 3c8c598 | 1998-05-29 02:58:20 +0000 | [diff] [blame] | 193 | PyObject_HEAD_INIT(NULL) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 194 | 0, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 195 | "ast", /* tp_name */ |
| 196 | (int) sizeof(PyAST_Object), /* tp_basicsize */ |
| 197 | 0, /* tp_itemsize */ |
| 198 | (destructor)parser_free, /* tp_dealloc */ |
| 199 | 0, /* tp_print */ |
| 200 | parser_getattr, /* tp_getattr */ |
| 201 | 0, /* tp_setattr */ |
| 202 | (cmpfunc)parser_compare, /* tp_compare */ |
| 203 | 0, /* tp_repr */ |
| 204 | 0, /* tp_as_number */ |
| 205 | 0, /* tp_as_sequence */ |
| 206 | 0, /* tp_as_mapping */ |
| 207 | 0, /* tp_hash */ |
| 208 | 0, /* tp_call */ |
| 209 | 0, /* tp_str */ |
| 210 | 0, /* tp_getattro */ |
| 211 | 0, /* tp_setattro */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 212 | |
| 213 | /* Functions to access object as input/output buffer */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 214 | 0, /* tp_as_buffer */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 215 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 216 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 217 | |
| 218 | /* __doc__ */ |
| 219 | "Intermediate representation of a Python parse tree." |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 220 | }; /* PyAST_Type */ |
| 221 | |
| 222 | |
| 223 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 224 | parser_compare_nodes(node *left, node *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 225 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 226 | int j; |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 227 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 228 | if (TYPE(left) < TYPE(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 229 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 230 | |
| 231 | if (TYPE(right) < TYPE(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 232 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 233 | |
| 234 | if (ISTERMINAL(TYPE(left))) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 235 | return (strcmp(STR(left), STR(right))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 236 | |
| 237 | if (NCH(left) < NCH(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 238 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 239 | |
| 240 | if (NCH(right) < NCH(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 241 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 242 | |
| 243 | for (j = 0; j < NCH(left); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 244 | int v = parser_compare_nodes(CHILD(left, j), CHILD(right, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 245 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 246 | if (v != 0) |
| 247 | return (v); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 248 | } |
| 249 | return (0); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 250 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 251 | |
| 252 | |
| 253 | /* int parser_compare(PyAST_Object* left, PyAST_Object* right) |
| 254 | * |
| 255 | * Comparison function used by the Python operators ==, !=, <, >, <=, >= |
| 256 | * This really just wraps a call to parser_compare_nodes() with some easy |
| 257 | * checks and protection code. |
| 258 | * |
| 259 | */ |
| 260 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 261 | parser_compare(PyAST_Object *left, PyAST_Object *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 262 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 263 | if (left == right) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 264 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 265 | |
| 266 | if ((left == 0) || (right == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 267 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 268 | |
| 269 | return (parser_compare_nodes(left->ast_node, right->ast_node)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 270 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 271 | |
| 272 | |
| 273 | /* parser_newastobject(node* ast) |
| 274 | * |
| 275 | * Allocates a new Python object representing an AST. This is simply the |
| 276 | * 'wrapper' object that holds a node* and allows it to be passed around in |
| 277 | * Python code. |
| 278 | * |
| 279 | */ |
| 280 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 281 | parser_newastobject(node *ast, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 282 | { |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 283 | PyAST_Object* o = PyObject_New(PyAST_Object, &PyAST_Type); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 284 | |
| 285 | if (o != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 286 | o->ast_node = ast; |
| 287 | o->ast_type = type; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 288 | } |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 289 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 290 | PyNode_Free(ast); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 291 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 292 | return ((PyObject*)o); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 293 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 294 | |
| 295 | |
| 296 | /* void parser_free(PyAST_Object* ast) |
| 297 | * |
| 298 | * This is called by a del statement that reduces the reference count to 0. |
| 299 | * |
| 300 | */ |
| 301 | static void |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 302 | parser_free(PyAST_Object *ast) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 303 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 304 | PyNode_Free(ast->ast_node); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 305 | PyObject_Del(ast); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 306 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 307 | |
| 308 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 309 | /* parser_ast2tuple(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 310 | * |
| 311 | * This provides conversion from a node* to a tuple object that can be |
| 312 | * returned to the Python-level caller. The AST object is not modified. |
| 313 | * |
| 314 | */ |
| 315 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 316 | parser_ast2tuple(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 317 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 318 | PyObject *line_option = 0; |
| 319 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 320 | int ok; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 321 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 322 | static char *keywords[] = {"ast", "line_info", NULL}; |
| 323 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 324 | if (self == NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 325 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|O:ast2tuple", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 326 | &PyAST_Type, &self, &line_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 327 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 328 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 329 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|O:totuple", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 330 | &line_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 331 | if (ok != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 332 | int lineno = 0; |
| 333 | if (line_option != NULL) { |
| 334 | lineno = (PyObject_IsTrue(line_option) != 0) ? 1 : 0; |
| 335 | } |
| 336 | /* |
| 337 | * Convert AST into a tuple representation. Use Guido's function, |
| 338 | * since it's known to work already. |
| 339 | */ |
| 340 | res = node2tuple(((PyAST_Object*)self)->ast_node, |
| 341 | PyTuple_New, PyTuple_SetItem, lineno); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 342 | } |
| 343 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 344 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 345 | |
| 346 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 347 | /* parser_ast2list(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 348 | * |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 349 | * This provides conversion from a node* to a list object that can be |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 350 | * returned to the Python-level caller. The AST object is not modified. |
| 351 | * |
| 352 | */ |
| 353 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 354 | parser_ast2list(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 355 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 356 | PyObject *line_option = 0; |
| 357 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 358 | int ok; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 359 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 360 | static char *keywords[] = {"ast", "line_info", NULL}; |
| 361 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 362 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 363 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|O:ast2list", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 364 | &PyAST_Type, &self, &line_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 365 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 366 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|O:tolist", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 367 | &line_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 368 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 369 | int lineno = 0; |
| 370 | if (line_option != 0) { |
| 371 | lineno = PyObject_IsTrue(line_option) ? 1 : 0; |
| 372 | } |
| 373 | /* |
| 374 | * Convert AST into a tuple representation. Use Guido's function, |
| 375 | * since it's known to work already. |
| 376 | */ |
| 377 | res = node2tuple(self->ast_node, |
| 378 | PyList_New, PyList_SetItem, lineno); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 379 | } |
| 380 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 381 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 382 | |
| 383 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 384 | /* parser_compileast(PyObject* self, PyObject* args) |
| 385 | * |
| 386 | * This function creates code objects from the parse tree represented by |
| 387 | * the passed-in data object. An optional file name is passed in as well. |
| 388 | * |
| 389 | */ |
| 390 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 391 | parser_compileast(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 392 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 393 | PyObject* res = 0; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 394 | char* str = "<ast>"; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 395 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 396 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 397 | static char *keywords[] = {"ast", "filename", NULL}; |
| 398 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 399 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 400 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|s:compileast", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 401 | &PyAST_Type, &self, &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 402 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 403 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|s:compile", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 404 | &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 405 | |
| 406 | if (ok) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 407 | res = (PyObject *)PyNode_Compile(self->ast_node, str); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 408 | |
| 409 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 410 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 411 | |
| 412 | |
| 413 | /* PyObject* parser_isexpr(PyObject* self, PyObject* args) |
| 414 | * PyObject* parser_issuite(PyObject* self, PyObject* args) |
| 415 | * |
| 416 | * Checks the passed-in AST object to determine if it is an expression or |
| 417 | * a statement suite, respectively. The return is a Python truth value. |
| 418 | * |
| 419 | */ |
| 420 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 421 | parser_isexpr(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 422 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 423 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 424 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 425 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 426 | static char *keywords[] = {"ast", NULL}; |
| 427 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 428 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 429 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:isexpr", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 430 | &PyAST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 431 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 432 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":isexpr", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 433 | |
| 434 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 435 | /* Check to see if the AST represents an expression or not. */ |
| 436 | res = (self->ast_type == PyAST_EXPR) ? Py_True : Py_False; |
| 437 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 438 | } |
| 439 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 440 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 441 | |
| 442 | |
| 443 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 444 | parser_issuite(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 445 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 446 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 447 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 448 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 449 | static char *keywords[] = {"ast", NULL}; |
| 450 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 451 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 452 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:issuite", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 453 | &PyAST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 454 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 455 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":issuite", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 456 | |
| 457 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 458 | /* Check to see if the AST represents an expression or not. */ |
| 459 | res = (self->ast_type == PyAST_EXPR) ? Py_False : Py_True; |
| 460 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 461 | } |
| 462 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 463 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 464 | |
| 465 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 466 | #define PUBLIC_METHOD_TYPE (METH_VARARGS|METH_KEYWORDS) |
| 467 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 468 | static PyMethodDef |
| 469 | parser_methods[] = { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 470 | {"compile", (PyCFunction)parser_compileast, PUBLIC_METHOD_TYPE, |
| 471 | "Compile this AST object into a code object."}, |
| 472 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
| 473 | "Determines if this AST object was created from an expression."}, |
| 474 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
| 475 | "Determines if this AST object was created from a suite."}, |
| 476 | {"tolist", (PyCFunction)parser_ast2list, PUBLIC_METHOD_TYPE, |
| 477 | "Creates a list-tree representation of this AST."}, |
| 478 | {"totuple", (PyCFunction)parser_ast2tuple, PUBLIC_METHOD_TYPE, |
| 479 | "Creates a tuple-tree representation of this AST."}, |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 480 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 481 | {NULL, NULL, 0, NULL} |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 482 | }; |
| 483 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 484 | |
| 485 | static PyObject* |
| 486 | parser_getattr(self, name) |
| 487 | PyObject *self; |
| 488 | char *name; |
| 489 | { |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 490 | return (Py_FindMethod(parser_methods, self, name)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 491 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 492 | |
| 493 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 494 | /* err_string(char* message) |
| 495 | * |
| 496 | * Sets the error string for an exception of type ParserError. |
| 497 | * |
| 498 | */ |
| 499 | static void |
| 500 | err_string(message) |
| 501 | char *message; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 502 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 503 | PyErr_SetString(parser_error, message); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 504 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 505 | |
| 506 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 507 | /* PyObject* parser_do_parse(PyObject* args, int type) |
| 508 | * |
| 509 | * Internal function to actually execute the parse and return the result if |
| 510 | * successful, or set an exception if not. |
| 511 | * |
| 512 | */ |
| 513 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 514 | parser_do_parse(PyObject *args, PyObject *kw, char *argspec, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 515 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 516 | char* string = 0; |
| 517 | PyObject* res = 0; |
| 518 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 519 | static char *keywords[] = {"source", NULL}; |
| 520 | |
| 521 | if (PyArg_ParseTupleAndKeywords(args, kw, argspec, keywords, &string)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 522 | node* n = PyParser_SimpleParseString(string, |
| 523 | (type == PyAST_EXPR) |
| 524 | ? eval_input : file_input); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 525 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 526 | if (n != 0) |
| 527 | res = parser_newastobject(n, type); |
| 528 | else |
| 529 | err_string("Could not parse string."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 530 | } |
| 531 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 532 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 533 | |
| 534 | |
| 535 | /* PyObject* parser_expr(PyObject* self, PyObject* args) |
| 536 | * PyObject* parser_suite(PyObject* self, PyObject* args) |
| 537 | * |
| 538 | * External interfaces to the parser itself. Which is called determines if |
| 539 | * the parser attempts to recognize an expression ('eval' form) or statement |
| 540 | * suite ('exec' form). The real work is done by parser_do_parse() above. |
| 541 | * |
| 542 | */ |
| 543 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 544 | parser_expr(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 545 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 546 | NOTE(ARGUNUSED(self)) |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 547 | return (parser_do_parse(args, kw, "s:expr", PyAST_EXPR)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 548 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 549 | |
| 550 | |
| 551 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 552 | parser_suite(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 553 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 554 | NOTE(ARGUNUSED(self)) |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 555 | return (parser_do_parse(args, kw, "s:suite", PyAST_SUITE)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 556 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 557 | |
| 558 | |
| 559 | |
| 560 | /* This is the messy part of the code. Conversion from a tuple to an AST |
| 561 | * object requires that the input tuple be valid without having to rely on |
| 562 | * catching an exception from the compiler. This is done to allow the |
| 563 | * compiler itself to remain fast, since most of its input will come from |
| 564 | * the parser directly, and therefore be known to be syntactically correct. |
| 565 | * This validation is done to ensure that we don't core dump the compile |
| 566 | * phase, returning an exception instead. |
| 567 | * |
| 568 | * Two aspects can be broken out in this code: creating a node tree from |
| 569 | * the tuple passed in, and verifying that it is indeed valid. It may be |
| 570 | * advantageous to expand the number of AST types to include funcdefs and |
| 571 | * lambdadefs to take advantage of the optimizer, recognizing those ASTs |
| 572 | * here. They are not necessary, and not quite as useful in a raw form. |
| 573 | * For now, let's get expressions and suites working reliably. |
| 574 | */ |
| 575 | |
| 576 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 577 | staticforward node* build_node_tree(PyObject *tuple); |
| 578 | staticforward int validate_expr_tree(node *tree); |
| 579 | staticforward int validate_file_input(node *tree); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 580 | |
| 581 | |
| 582 | /* PyObject* parser_tuple2ast(PyObject* self, PyObject* args) |
| 583 | * |
| 584 | * This is the public function, called from the Python code. It receives a |
| 585 | * single tuple object from the caller, and creates an AST object if the |
| 586 | * tuple can be validated. It does this by checking the first code of the |
| 587 | * tuple, and, if acceptable, builds the internal representation. If this |
| 588 | * step succeeds, the internal representation is validated as fully as |
| 589 | * possible with the various validate_*() routines defined below. |
| 590 | * |
| 591 | * This function must be changed if support is to be added for PyAST_FRAGMENT |
| 592 | * AST objects. |
| 593 | * |
| 594 | */ |
| 595 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 596 | parser_tuple2ast(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 597 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 598 | NOTE(ARGUNUSED(self)) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 599 | PyObject *ast = 0; |
| 600 | PyObject *tuple = 0; |
| 601 | PyObject *temp = 0; |
| 602 | int ok; |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 603 | int start_sym = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 604 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 605 | static char *keywords[] = {"sequence", NULL}; |
| 606 | |
| 607 | if (!PyArg_ParseTupleAndKeywords(args, kw, "O:tuple2ast", keywords, |
| 608 | &tuple)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 609 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 610 | if (!PySequence_Check(tuple)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 611 | PyErr_SetString(PyExc_ValueError, |
| 612 | "tuple2ast() requires a single sequence argument"); |
| 613 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 614 | } |
| 615 | /* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 616 | * This mess of tests is written this way so we can use the abstract |
| 617 | * object interface (AOI). Unfortunately, the AOI increments reference |
| 618 | * counts, which requires that we store a pointer to retrieved object |
| 619 | * so we can DECREF it after the check. But we really should accept |
| 620 | * lists as well as tuples at the very least. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 621 | */ |
| 622 | ok = PyObject_Length(tuple) >= 2; |
| 623 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 624 | temp = PySequence_GetItem(tuple, 0); |
| 625 | ok = (temp != NULL) && PyInt_Check(temp); |
| 626 | if (ok) |
| 627 | /* this is used after the initial checks: */ |
| 628 | start_sym = PyInt_AS_LONG(temp); |
| 629 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 630 | } |
| 631 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 632 | temp = PySequence_GetItem(tuple, 1); |
| 633 | ok = (temp != NULL) && PySequence_Check(temp); |
| 634 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 635 | } |
| 636 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 637 | temp = PySequence_GetItem(tuple, 1); |
| 638 | ok = (temp != NULL) && PyObject_Length(temp) >= 2; |
| 639 | if (ok) { |
| 640 | PyObject *temp2 = PySequence_GetItem(temp, 0); |
| 641 | if (temp2 != NULL) { |
| 642 | ok = PyInt_Check(temp2); |
| 643 | Py_DECREF(temp2); |
| 644 | } |
| 645 | } |
| 646 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 647 | } |
| 648 | /* If we've failed at some point, get out of here. */ |
| 649 | if (!ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 650 | err_string("malformed sequence for tuple2ast()"); |
| 651 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 652 | } |
| 653 | /* |
| 654 | * This might be a valid parse tree, but let's do a quick check |
| 655 | * before we jump the gun. |
| 656 | */ |
| 657 | if (start_sym == eval_input) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 658 | /* Might be an eval form. */ |
| 659 | node* expression = build_node_tree(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 660 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 661 | if ((expression != 0) && validate_expr_tree(expression)) |
| 662 | ast = parser_newastobject(expression, PyAST_EXPR); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 663 | } |
| 664 | else if (start_sym == file_input) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 665 | /* This looks like an exec form so far. */ |
| 666 | node* suite_tree = build_node_tree(tuple); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 667 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 668 | if ((suite_tree != 0) && validate_file_input(suite_tree)) |
| 669 | ast = parser_newastobject(suite_tree, PyAST_SUITE); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 670 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 671 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 672 | /* This is a fragment, and is not yet supported. Maybe they |
| 673 | * will be if I find a use for them. |
| 674 | */ |
| 675 | err_string("Fragmentary parse trees not supported."); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 676 | |
| 677 | /* Make sure we throw an exception on all errors. We should never |
| 678 | * get this, but we'd do well to be sure something is done. |
| 679 | */ |
| 680 | if ((ast == 0) && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 681 | err_string("Unspecified ast error occurred."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 682 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 683 | return (ast); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 684 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 685 | |
| 686 | |
| 687 | /* int check_terminal_tuple() |
| 688 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 689 | * Check a tuple to determine that it is indeed a valid terminal |
| 690 | * node. The node is known to be required as a terminal, so we throw |
| 691 | * an exception if there is a failure. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 692 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 693 | * The format of an acceptable terminal tuple is "(is[i])": the fact |
| 694 | * that elem is a tuple and the integer is a valid terminal symbol |
| 695 | * has been established before this function is called. We must |
| 696 | * check the length of the tuple and the type of the second element |
| 697 | * and optional third element. We do *NOT* check the actual text of |
| 698 | * the string element, which we could do in many cases. This is done |
| 699 | * by the validate_*() functions which operate on the internal |
| 700 | * representation. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 701 | */ |
| 702 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 703 | check_terminal_tuple(PyObject *elem) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 704 | { |
| 705 | int len = PyObject_Length(elem); |
| 706 | int res = 1; |
| 707 | char* str = "Illegal terminal symbol; bad node length."; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 708 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 709 | if ((len == 2) || (len == 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 710 | PyObject *temp = PySequence_GetItem(elem, 1); |
| 711 | res = PyString_Check(temp); |
| 712 | str = "Illegal terminal symbol; expected a string."; |
| 713 | if (res && (len == 3)) { |
| 714 | PyObject* third = PySequence_GetItem(elem, 2); |
| 715 | res = PyInt_Check(third); |
| 716 | str = "Invalid third element of terminal node."; |
| 717 | Py_XDECREF(third); |
| 718 | } |
| 719 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 720 | } |
| 721 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 722 | res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 723 | } |
| 724 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 725 | elem = Py_BuildValue("(os)", elem, str); |
| 726 | PyErr_SetObject(parser_error, elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 727 | } |
| 728 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 729 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 730 | |
| 731 | |
| 732 | /* node* build_node_children() |
| 733 | * |
| 734 | * Iterate across the children of the current non-terminal node and build |
| 735 | * their structures. If successful, return the root of this portion of |
| 736 | * the tree, otherwise, 0. Any required exception will be specified already, |
| 737 | * and no memory will have been deallocated. |
| 738 | * |
| 739 | */ |
| 740 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 741 | build_node_children(PyObject *tuple, node *root, int *line_num) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 742 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 743 | int len = PyObject_Length(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 744 | int i; |
| 745 | |
| 746 | for (i = 1; i < len; ++i) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 747 | /* elem must always be a tuple, however simple */ |
| 748 | PyObject* elem = PySequence_GetItem(tuple, i); |
| 749 | int ok = elem != NULL; |
| 750 | long type = 0; |
| 751 | char *strn = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 752 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 753 | if (ok) |
| 754 | ok = PySequence_Check(elem); |
| 755 | if (ok) { |
| 756 | PyObject *temp = PySequence_GetItem(elem, 0); |
| 757 | if (temp == NULL) |
| 758 | ok = 0; |
| 759 | else { |
| 760 | ok = PyInt_Check(temp); |
| 761 | if (ok) |
| 762 | type = PyInt_AS_LONG(temp); |
| 763 | Py_DECREF(temp); |
| 764 | } |
| 765 | } |
| 766 | if (!ok) { |
| 767 | PyErr_SetObject(parser_error, |
| 768 | Py_BuildValue("(os)", elem, |
| 769 | "Illegal node construct.")); |
| 770 | Py_XDECREF(elem); |
| 771 | return (0); |
| 772 | } |
| 773 | if (ISTERMINAL(type)) { |
| 774 | if (check_terminal_tuple(elem)) { |
| 775 | PyObject *temp = PySequence_GetItem(elem, 1); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 776 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 777 | /* check_terminal_tuple() already verified it's a string */ |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 778 | strn = (char *)PyMem_MALLOC(PyString_GET_SIZE(temp) + 1); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 779 | if (strn != NULL) |
| 780 | (void) strcpy(strn, PyString_AS_STRING(temp)); |
Guido van Rossum | b18618d | 2000-05-03 23:44:39 +0000 | [diff] [blame] | 781 | Py_DECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 782 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 783 | if (PyObject_Length(elem) == 3) { |
| 784 | PyObject* temp = PySequence_GetItem(elem, 2); |
| 785 | *line_num = PyInt_AsLong(temp); |
| 786 | Py_DECREF(temp); |
| 787 | } |
| 788 | } |
| 789 | else { |
| 790 | Py_XDECREF(elem); |
| 791 | return (0); |
| 792 | } |
| 793 | } |
| 794 | else if (!ISNONTERMINAL(type)) { |
| 795 | /* |
| 796 | * It has to be one or the other; this is an error. |
| 797 | * Throw an exception. |
| 798 | */ |
| 799 | PyErr_SetObject(parser_error, |
| 800 | Py_BuildValue("(os)", elem, |
| 801 | "Unknown node type.")); |
| 802 | Py_XDECREF(elem); |
| 803 | return (0); |
| 804 | } |
| 805 | PyNode_AddChild(root, type, strn, *line_num); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 806 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 807 | if (ISNONTERMINAL(type)) { |
| 808 | node* new_child = CHILD(root, i - 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 809 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 810 | if (new_child != build_node_children(elem, new_child, line_num)) { |
| 811 | Py_XDECREF(elem); |
| 812 | return (0); |
| 813 | } |
| 814 | } |
| 815 | else if (type == NEWLINE) { /* It's true: we increment the */ |
| 816 | ++(*line_num); /* line number *after* the newline! */ |
| 817 | } |
| 818 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 819 | } |
| 820 | return (root); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 821 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 822 | |
| 823 | |
| 824 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 825 | build_node_tree(PyObject *tuple) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 826 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 827 | node* res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 828 | PyObject *temp = PySequence_GetItem(tuple, 0); |
| 829 | long num = -1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 830 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 831 | if (temp != NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 832 | num = PyInt_AsLong(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 833 | Py_XDECREF(temp); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 834 | if (ISTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 835 | /* |
| 836 | * The tuple is simple, but it doesn't start with a start symbol. |
| 837 | * Throw an exception now and be done with it. |
| 838 | */ |
| 839 | tuple = Py_BuildValue("(os)", tuple, |
| 840 | "Illegal ast tuple; cannot start with terminal symbol."); |
| 841 | PyErr_SetObject(parser_error, tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 842 | } |
| 843 | else if (ISNONTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 844 | /* |
| 845 | * Not efficient, but that can be handled later. |
| 846 | */ |
| 847 | int line_num = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 848 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 849 | res = PyNode_New(num); |
| 850 | if (res != build_node_children(tuple, res, &line_num)) { |
| 851 | PyNode_Free(res); |
| 852 | res = 0; |
| 853 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 854 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 855 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 856 | /* The tuple is illegal -- if the number is neither TERMINAL nor |
| 857 | * NONTERMINAL, we can't use it. |
| 858 | */ |
| 859 | PyErr_SetObject(parser_error, |
| 860 | Py_BuildValue("(os)", tuple, |
| 861 | "Illegal component tuple.")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 862 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 863 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 864 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 865 | |
| 866 | |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 867 | #ifdef HAVE_OLD_CPP |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 868 | #define VALIDATER(n) static int validate_/**/n(node *tree) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 869 | #else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 870 | #define VALIDATER(n) static int validate_##n(node *tree) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 871 | #endif |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 872 | |
| 873 | |
| 874 | /* |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 875 | * Validation routines used within the validation section: |
| 876 | */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 877 | staticforward int validate_terminal(node *terminal, int type, char *string); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 878 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 879 | #define validate_ampersand(ch) validate_terminal(ch, AMPER, "&") |
| 880 | #define validate_circumflex(ch) validate_terminal(ch, CIRCUMFLEX, "^") |
| 881 | #define validate_colon(ch) validate_terminal(ch, COLON, ":") |
| 882 | #define validate_comma(ch) validate_terminal(ch, COMMA, ",") |
| 883 | #define validate_dedent(ch) validate_terminal(ch, DEDENT, "") |
| 884 | #define validate_equal(ch) validate_terminal(ch, EQUAL, "=") |
| 885 | #define validate_indent(ch) validate_terminal(ch, INDENT, (char*)NULL) |
| 886 | #define validate_lparen(ch) validate_terminal(ch, LPAR, "(") |
| 887 | #define validate_newline(ch) validate_terminal(ch, NEWLINE, (char*)NULL) |
| 888 | #define validate_rparen(ch) validate_terminal(ch, RPAR, ")") |
| 889 | #define validate_semi(ch) validate_terminal(ch, SEMI, ";") |
| 890 | #define validate_star(ch) validate_terminal(ch, STAR, "*") |
| 891 | #define validate_vbar(ch) validate_terminal(ch, VBAR, "|") |
| 892 | #define validate_doublestar(ch) validate_terminal(ch, DOUBLESTAR, "**") |
| 893 | #define validate_dot(ch) validate_terminal(ch, DOT, ".") |
| 894 | #define validate_name(ch, str) validate_terminal(ch, NAME, str) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 895 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 896 | VALIDATER(node); VALIDATER(small_stmt); |
| 897 | VALIDATER(class); VALIDATER(node); |
| 898 | VALIDATER(parameters); VALIDATER(suite); |
| 899 | VALIDATER(testlist); VALIDATER(varargslist); |
| 900 | VALIDATER(fpdef); VALIDATER(fplist); |
| 901 | VALIDATER(stmt); VALIDATER(simple_stmt); |
| 902 | VALIDATER(expr_stmt); VALIDATER(power); |
| 903 | VALIDATER(print_stmt); VALIDATER(del_stmt); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 904 | VALIDATER(return_stmt); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 905 | VALIDATER(raise_stmt); VALIDATER(import_stmt); |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 906 | VALIDATER(global_stmt); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 907 | VALIDATER(assert_stmt); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 908 | VALIDATER(exec_stmt); VALIDATER(compound_stmt); |
| 909 | VALIDATER(while); VALIDATER(for); |
| 910 | VALIDATER(try); VALIDATER(except_clause); |
| 911 | VALIDATER(test); VALIDATER(and_test); |
| 912 | VALIDATER(not_test); VALIDATER(comparison); |
| 913 | VALIDATER(comp_op); VALIDATER(expr); |
| 914 | VALIDATER(xor_expr); VALIDATER(and_expr); |
| 915 | VALIDATER(shift_expr); VALIDATER(arith_expr); |
| 916 | VALIDATER(term); VALIDATER(factor); |
| 917 | VALIDATER(atom); VALIDATER(lambdef); |
| 918 | VALIDATER(trailer); VALIDATER(subscript); |
| 919 | VALIDATER(subscriptlist); VALIDATER(sliceop); |
| 920 | VALIDATER(exprlist); VALIDATER(dictmaker); |
| 921 | VALIDATER(arglist); VALIDATER(argument); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 922 | |
| 923 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 924 | #define is_even(n) (((n) & 1) == 0) |
| 925 | #define is_odd(n) (((n) & 1) == 1) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 926 | |
| 927 | |
| 928 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 929 | validate_ntype(node *n, int t) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 930 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 931 | int res = (TYPE(n) == t); |
| 932 | |
| 933 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 934 | char buffer[128]; |
| 935 | (void) sprintf(buffer, "Expected node type %d, got %d.", t, TYPE(n)); |
| 936 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 937 | } |
| 938 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 939 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 940 | |
| 941 | |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 942 | /* Verifies that the number of child nodes is exactly 'num', raising |
| 943 | * an exception if it isn't. The exception message does not indicate |
| 944 | * the exact number of nodes, allowing this to be used to raise the |
| 945 | * "right" exception when the wrong number of nodes is present in a |
| 946 | * specific variant of a statement's syntax. This is commonly used |
| 947 | * in that fashion. |
| 948 | */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 949 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 950 | validate_numnodes(node *n, int num, const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 951 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 952 | if (NCH(n) != num) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 953 | char buff[60]; |
| 954 | (void) sprintf(buff, "Illegal number of children for %s node.", name); |
| 955 | err_string(buff); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 956 | } |
| 957 | return (NCH(n) == num); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 958 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 959 | |
| 960 | |
| 961 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 962 | validate_terminal(node *terminal, int type, char *string) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 963 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 964 | int res = (validate_ntype(terminal, type) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 965 | && ((string == 0) || (strcmp(string, STR(terminal)) == 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 966 | |
| 967 | if (!res && !PyErr_Occurred()) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 968 | char buffer[60]; |
| 969 | (void) sprintf(buffer, "Illegal terminal: expected \"%s\"", string); |
| 970 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 971 | } |
| 972 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 973 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 974 | |
| 975 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 976 | /* X (',' X) [','] |
| 977 | */ |
| 978 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 979 | validate_repeating_list(node *tree, int ntype, int (*vfunc)(), |
| 980 | const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 981 | { |
| 982 | int nch = NCH(tree); |
| 983 | int res = (nch && validate_ntype(tree, ntype) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 984 | && vfunc(CHILD(tree, 0))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 985 | |
| 986 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 987 | (void) validate_numnodes(tree, 1, name); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 988 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 989 | if (is_even(nch)) |
| 990 | res = validate_comma(CHILD(tree, --nch)); |
| 991 | if (res && nch > 1) { |
| 992 | int pos = 1; |
| 993 | for ( ; res && pos < nch; pos += 2) |
| 994 | res = (validate_comma(CHILD(tree, pos)) |
| 995 | && vfunc(CHILD(tree, pos + 1))); |
| 996 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 997 | } |
| 998 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 999 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1000 | |
| 1001 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1002 | /* VALIDATE(class) |
| 1003 | * |
| 1004 | * classdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1005 | * 'class' NAME ['(' testlist ')'] ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1006 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1007 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1008 | validate_class(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1009 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1010 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1011 | int res = validate_ntype(tree, classdef) && ((nch == 4) || (nch == 7)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1012 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1013 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1014 | res = (validate_name(CHILD(tree, 0), "class") |
| 1015 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1016 | && validate_colon(CHILD(tree, nch - 2)) |
| 1017 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1018 | } |
| 1019 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1020 | (void) validate_numnodes(tree, 4, "class"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1021 | if (res && (nch == 7)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1022 | res = (validate_lparen(CHILD(tree, 2)) |
| 1023 | && validate_testlist(CHILD(tree, 3)) |
| 1024 | && validate_rparen(CHILD(tree, 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1025 | } |
| 1026 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1027 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1028 | |
| 1029 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1030 | /* if_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1031 | * 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1032 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1033 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1034 | validate_if(node *tree) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1035 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1036 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1037 | int res = (validate_ntype(tree, if_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1038 | && (nch >= 4) |
| 1039 | && validate_name(CHILD(tree, 0), "if") |
| 1040 | && validate_test(CHILD(tree, 1)) |
| 1041 | && validate_colon(CHILD(tree, 2)) |
| 1042 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1043 | |
| 1044 | if (res && ((nch % 4) == 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1045 | /* ... 'else' ':' suite */ |
| 1046 | res = (validate_name(CHILD(tree, nch - 3), "else") |
| 1047 | && validate_colon(CHILD(tree, nch - 2)) |
| 1048 | && validate_suite(CHILD(tree, nch - 1))); |
| 1049 | nch -= 3; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1050 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1051 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1052 | (void) validate_numnodes(tree, 4, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1053 | if ((nch % 4) != 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1054 | /* Will catch the case for nch < 4 */ |
| 1055 | res = validate_numnodes(tree, 0, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1056 | else if (res && (nch > 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1057 | /* ... ('elif' test ':' suite)+ ... */ |
| 1058 | int j = 4; |
| 1059 | while ((j < nch) && res) { |
| 1060 | res = (validate_name(CHILD(tree, j), "elif") |
| 1061 | && validate_colon(CHILD(tree, j + 2)) |
| 1062 | && validate_test(CHILD(tree, j + 1)) |
| 1063 | && validate_suite(CHILD(tree, j + 3))); |
| 1064 | j += 4; |
| 1065 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1066 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1067 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1068 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1069 | |
| 1070 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1071 | /* parameters: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1072 | * '(' [varargslist] ')' |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1073 | * |
| 1074 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1075 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1076 | validate_parameters(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1077 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1078 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1079 | int res = validate_ntype(tree, parameters) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1080 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1081 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1082 | res = (validate_lparen(CHILD(tree, 0)) |
| 1083 | && validate_rparen(CHILD(tree, nch - 1))); |
| 1084 | if (res && (nch == 3)) |
| 1085 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1086 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1087 | else { |
| 1088 | (void) validate_numnodes(tree, 2, "parameters"); |
| 1089 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1090 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1091 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1092 | |
| 1093 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1094 | /* VALIDATE(suite) |
| 1095 | * |
| 1096 | * suite: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1097 | * simple_stmt |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1098 | * | NEWLINE INDENT stmt+ DEDENT |
| 1099 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1100 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1101 | validate_suite(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1102 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1103 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1104 | int res = (validate_ntype(tree, suite) && ((nch == 1) || (nch >= 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1105 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1106 | if (res && (nch == 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1107 | res = validate_simple_stmt(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1108 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1109 | /* NEWLINE INDENT stmt+ DEDENT */ |
| 1110 | res = (validate_newline(CHILD(tree, 0)) |
| 1111 | && validate_indent(CHILD(tree, 1)) |
| 1112 | && validate_stmt(CHILD(tree, 2)) |
| 1113 | && validate_dedent(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1114 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1115 | if (res && (nch > 4)) { |
| 1116 | int i = 3; |
| 1117 | --nch; /* forget the DEDENT */ |
| 1118 | for ( ; res && (i < nch); ++i) |
| 1119 | res = validate_stmt(CHILD(tree, i)); |
| 1120 | } |
| 1121 | else if (nch < 4) |
| 1122 | res = validate_numnodes(tree, 4, "suite"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1123 | } |
| 1124 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1125 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1126 | |
| 1127 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1128 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1129 | validate_testlist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1130 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1131 | return (validate_repeating_list(tree, testlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1132 | validate_test, "testlist")); |
| 1133 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1134 | |
| 1135 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1136 | /* VALIDATE(varargslist) |
| 1137 | * |
| 1138 | * varargslist: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1139 | * (fpdef ['=' test] ',')* ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1140 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1141 | * |
| 1142 | * (fpdef ['=' test] ',')* |
| 1143 | * ('*' NAME [',' ('**'|'*' '*') NAME] |
| 1144 | * | ('**'|'*' '*') NAME) |
| 1145 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1146 | * |
| 1147 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1148 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1149 | validate_varargslist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1150 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1151 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1152 | int res = validate_ntype(tree, varargslist) && (nch != 0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1153 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1154 | if (res && (nch >= 2) && (TYPE(CHILD(tree, nch - 1)) == NAME)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1155 | /* (fpdef ['=' test] ',')* |
| 1156 | * ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
| 1157 | */ |
| 1158 | int pos = 0; |
| 1159 | int remaining = nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1160 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1161 | while (res && (TYPE(CHILD(tree, pos)) == fpdef)) { |
| 1162 | res = validate_fpdef(CHILD(tree, pos)); |
| 1163 | if (res) { |
| 1164 | if (TYPE(CHILD(tree, pos + 1)) == EQUAL) { |
| 1165 | res = validate_test(CHILD(tree, pos + 2)); |
| 1166 | pos += 2; |
| 1167 | } |
| 1168 | res = res && validate_comma(CHILD(tree, pos + 1)); |
| 1169 | pos += 2; |
| 1170 | } |
| 1171 | } |
| 1172 | if (res) { |
| 1173 | remaining = nch - pos; |
| 1174 | res = ((remaining == 2) || (remaining == 3) |
| 1175 | || (remaining == 5) || (remaining == 6)); |
| 1176 | if (!res) |
| 1177 | (void) validate_numnodes(tree, 2, "varargslist"); |
| 1178 | else if (TYPE(CHILD(tree, pos)) == DOUBLESTAR) |
| 1179 | return ((remaining == 2) |
| 1180 | && validate_ntype(CHILD(tree, pos+1), NAME)); |
| 1181 | else { |
| 1182 | res = validate_star(CHILD(tree, pos++)); |
| 1183 | --remaining; |
| 1184 | } |
| 1185 | } |
| 1186 | if (res) { |
| 1187 | if (remaining == 2) { |
| 1188 | res = (validate_star(CHILD(tree, pos)) |
| 1189 | && validate_ntype(CHILD(tree, pos + 1), NAME)); |
| 1190 | } |
| 1191 | else { |
| 1192 | res = validate_ntype(CHILD(tree, pos++), NAME); |
| 1193 | if (res && (remaining >= 4)) { |
| 1194 | res = validate_comma(CHILD(tree, pos)); |
| 1195 | if (--remaining == 3) |
| 1196 | res = (validate_star(CHILD(tree, pos + 1)) |
| 1197 | && validate_star(CHILD(tree, pos + 2))); |
| 1198 | else |
| 1199 | res = validate_ntype(CHILD(tree, pos + 1), DOUBLESTAR); |
| 1200 | } |
| 1201 | } |
| 1202 | } |
| 1203 | if (!res && !PyErr_Occurred()) |
| 1204 | err_string("Incorrect validation of variable arguments list."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1205 | } |
| 1206 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1207 | /* fpdef ['=' test] (',' fpdef ['=' test])* [','] */ |
| 1208 | if (TYPE(CHILD(tree, nch - 1)) == COMMA) |
| 1209 | --nch; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1210 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1211 | /* fpdef ['=' test] (',' fpdef ['=' test])* */ |
| 1212 | res = (is_odd(nch) |
| 1213 | && validate_fpdef(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1214 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1215 | if (res && (nch > 1)) { |
| 1216 | int pos = 1; |
| 1217 | if (TYPE(CHILD(tree, 1)) == EQUAL) { |
| 1218 | res = validate_test(CHILD(tree, 2)); |
| 1219 | pos += 2; |
| 1220 | } |
| 1221 | /* ... (',' fpdef ['=' test])* */ |
| 1222 | for ( ; res && (pos < nch); pos += 2) { |
| 1223 | /* ',' fpdef */ |
| 1224 | res = (validate_comma(CHILD(tree, pos)) |
| 1225 | && validate_fpdef(CHILD(tree, pos + 1))); |
| 1226 | if (res |
| 1227 | && ((nch - pos) > 2) |
| 1228 | && (TYPE(CHILD(tree, pos + 2)) == EQUAL)) { |
| 1229 | /* ['=' test] */ |
| 1230 | res = validate_test(CHILD(tree, pos + 3)); |
| 1231 | pos += 2; |
| 1232 | } |
| 1233 | } |
| 1234 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1235 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1236 | else { |
| 1237 | err_string("Improperly formed argument list."); |
| 1238 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1239 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1240 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1241 | |
| 1242 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1243 | /* VALIDATE(fpdef) |
| 1244 | * |
| 1245 | * fpdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1246 | * NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1247 | * | '(' fplist ')' |
| 1248 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1249 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1250 | validate_fpdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1251 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1252 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1253 | int res = validate_ntype(tree, fpdef); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1254 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1255 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1256 | if (nch == 1) |
| 1257 | res = validate_ntype(CHILD(tree, 0), NAME); |
| 1258 | else if (nch == 3) |
| 1259 | res = (validate_lparen(CHILD(tree, 0)) |
| 1260 | && validate_fplist(CHILD(tree, 1)) |
| 1261 | && validate_rparen(CHILD(tree, 2))); |
| 1262 | else |
| 1263 | res = validate_numnodes(tree, 1, "fpdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1264 | } |
| 1265 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1266 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1267 | |
| 1268 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1269 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1270 | validate_fplist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1271 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1272 | return (validate_repeating_list(tree, fplist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1273 | validate_fpdef, "fplist")); |
| 1274 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1275 | |
| 1276 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1277 | /* simple_stmt | compound_stmt |
| 1278 | * |
| 1279 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1280 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1281 | validate_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1282 | { |
| 1283 | int res = (validate_ntype(tree, stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1284 | && validate_numnodes(tree, 1, "stmt")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1285 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1286 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1287 | tree = CHILD(tree, 0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1288 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1289 | if (TYPE(tree) == simple_stmt) |
| 1290 | res = validate_simple_stmt(tree); |
| 1291 | else |
| 1292 | res = validate_compound_stmt(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1293 | } |
| 1294 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1295 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1296 | |
| 1297 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1298 | /* small_stmt (';' small_stmt)* [';'] NEWLINE |
| 1299 | * |
| 1300 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1301 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1302 | validate_simple_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1303 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1304 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1305 | int res = (validate_ntype(tree, simple_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1306 | && (nch >= 2) |
| 1307 | && validate_small_stmt(CHILD(tree, 0)) |
| 1308 | && validate_newline(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1309 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1310 | if (nch < 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1311 | res = validate_numnodes(tree, 2, "simple_stmt"); |
| 1312 | --nch; /* forget the NEWLINE */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1313 | if (res && is_even(nch)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1314 | res = validate_semi(CHILD(tree, --nch)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1315 | if (res && (nch > 2)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1316 | int i; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1317 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1318 | for (i = 1; res && (i < nch); i += 2) |
| 1319 | res = (validate_semi(CHILD(tree, i)) |
| 1320 | && validate_small_stmt(CHILD(tree, i + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1321 | } |
| 1322 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1323 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1324 | |
| 1325 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1326 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1327 | validate_small_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1328 | { |
| 1329 | int nch = NCH(tree); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1330 | int res = (validate_numnodes(tree, 1, "small_stmt") |
| 1331 | && ((TYPE(CHILD(tree, 0)) == expr_stmt) |
| 1332 | || (TYPE(CHILD(tree, 0)) == print_stmt) |
| 1333 | || (TYPE(CHILD(tree, 0)) == del_stmt) |
| 1334 | || (TYPE(CHILD(tree, 0)) == pass_stmt) |
| 1335 | || (TYPE(CHILD(tree, 0)) == flow_stmt) |
| 1336 | || (TYPE(CHILD(tree, 0)) == import_stmt) |
| 1337 | || (TYPE(CHILD(tree, 0)) == global_stmt) |
| 1338 | || (TYPE(CHILD(tree, 0)) == assert_stmt) |
| 1339 | || (TYPE(CHILD(tree, 0)) == exec_stmt))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1340 | |
| 1341 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1342 | res = validate_node(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1343 | else if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1344 | char buffer[60]; |
| 1345 | (void) sprintf(buffer, "Unrecognized child node of small_stmt: %d.", |
| 1346 | TYPE(CHILD(tree, 0))); |
| 1347 | err_string(buffer); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1348 | } |
| 1349 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1350 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1351 | |
| 1352 | |
| 1353 | /* compound_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1354 | * if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1355 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1356 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1357 | validate_compound_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1358 | { |
| 1359 | int res = (validate_ntype(tree, compound_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1360 | && validate_numnodes(tree, 1, "compound_stmt")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1361 | |
| 1362 | if (!res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1363 | return (0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1364 | |
| 1365 | tree = CHILD(tree, 0); |
| 1366 | res = ((TYPE(tree) == if_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1367 | || (TYPE(tree) == while_stmt) |
| 1368 | || (TYPE(tree) == for_stmt) |
| 1369 | || (TYPE(tree) == try_stmt) |
| 1370 | || (TYPE(tree) == funcdef) |
| 1371 | || (TYPE(tree) == classdef)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1372 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1373 | res = validate_node(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1374 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1375 | char buffer[60]; |
| 1376 | (void) sprintf(buffer, "Illegal compound statement type: %d.", |
| 1377 | TYPE(tree)); |
| 1378 | err_string(buffer); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1379 | } |
| 1380 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1381 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1382 | |
| 1383 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1384 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1385 | validate_expr_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1386 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1387 | int j; |
| 1388 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1389 | int res = (validate_ntype(tree, expr_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1390 | && is_odd(nch) |
| 1391 | && validate_testlist(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1392 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1393 | for (j = 1; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1394 | res = (validate_equal(CHILD(tree, j)) |
| 1395 | && validate_testlist(CHILD(tree, j + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1396 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1397 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1398 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1399 | |
| 1400 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1401 | /* print_stmt: |
| 1402 | * |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1403 | * 'print' (test ',')* [test] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1404 | * |
| 1405 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1406 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1407 | validate_print_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1408 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1409 | int j; |
| 1410 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1411 | int res = (validate_ntype(tree, print_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1412 | && (nch != 0) |
| 1413 | && validate_name(CHILD(tree, 0), "print")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1414 | |
| 1415 | if (res && is_even(nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1416 | res = validate_test(CHILD(tree, nch - 1)); |
| 1417 | --nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1418 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1419 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1420 | (void) validate_numnodes(tree, 1, "print_stmt"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1421 | for (j = 1; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1422 | res = (validate_test(CHILD(tree, j)) |
| 1423 | && validate_ntype(CHILD(tree, j + 1), COMMA)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1424 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1425 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1426 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1427 | |
| 1428 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1429 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1430 | validate_del_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1431 | { |
| 1432 | return (validate_numnodes(tree, 2, "del_stmt") |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1433 | && validate_name(CHILD(tree, 0), "del") |
| 1434 | && validate_exprlist(CHILD(tree, 1))); |
| 1435 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1436 | |
| 1437 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1438 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1439 | validate_return_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1440 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1441 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1442 | int res = (validate_ntype(tree, return_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1443 | && ((nch == 1) || (nch == 2)) |
| 1444 | && validate_name(CHILD(tree, 0), "return")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1445 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1446 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1447 | res = validate_testlist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1448 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1449 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1450 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1451 | |
| 1452 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1453 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1454 | validate_raise_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1455 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1456 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1457 | int res = (validate_ntype(tree, raise_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1458 | && ((nch == 1) || (nch == 2) || (nch == 4) || (nch == 6))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1459 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1460 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1461 | res = validate_name(CHILD(tree, 0), "raise"); |
| 1462 | if (res && (nch >= 2)) |
| 1463 | res = validate_test(CHILD(tree, 1)); |
| 1464 | if (res && nch > 2) { |
| 1465 | res = (validate_comma(CHILD(tree, 2)) |
| 1466 | && validate_test(CHILD(tree, 3))); |
| 1467 | if (res && (nch > 4)) |
| 1468 | res = (validate_comma(CHILD(tree, 4)) |
| 1469 | && validate_test(CHILD(tree, 5))); |
| 1470 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1471 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1472 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1473 | (void) validate_numnodes(tree, 2, "raise"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1474 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1475 | res = (validate_comma(CHILD(tree, 2)) |
| 1476 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1477 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1478 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1479 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1480 | |
| 1481 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1482 | /* import_stmt: |
| 1483 | * |
| 1484 | * 'import' dotted_name (',' dotted_name)* |
| 1485 | * | 'from' dotted_name 'import' ('*' | NAME (',' NAME)*) |
| 1486 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1487 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1488 | validate_import_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1489 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1490 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1491 | int res = (validate_ntype(tree, import_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1492 | && (nch >= 2) && is_even(nch) |
| 1493 | && validate_ntype(CHILD(tree, 0), NAME) |
| 1494 | && validate_ntype(CHILD(tree, 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1495 | |
| 1496 | if (res && (strcmp(STR(CHILD(tree, 0)), "import") == 0)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1497 | int j; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1498 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1499 | for (j = 2; res && (j < nch); j += 2) |
| 1500 | res = (validate_comma(CHILD(tree, j)) |
| 1501 | && validate_ntype(CHILD(tree, j + 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1502 | } |
| 1503 | else if (res && validate_name(CHILD(tree, 0), "from")) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1504 | res = ((nch >= 4) && is_even(nch) |
| 1505 | && validate_name(CHILD(tree, 2), "import")); |
| 1506 | if (nch == 4) { |
| 1507 | res = ((TYPE(CHILD(tree, 3)) == NAME) |
| 1508 | || (TYPE(CHILD(tree, 3)) == STAR)); |
| 1509 | if (!res) |
| 1510 | err_string("Illegal import statement."); |
| 1511 | } |
| 1512 | else { |
| 1513 | /* 'from' NAME 'import' NAME (',' NAME)+ */ |
| 1514 | int j; |
| 1515 | res = validate_ntype(CHILD(tree, 3), NAME); |
| 1516 | for (j = 4; res && (j < nch); j += 2) |
| 1517 | res = (validate_comma(CHILD(tree, j)) |
| 1518 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
| 1519 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1520 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1521 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1522 | res = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1523 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1524 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1525 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1526 | |
| 1527 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1528 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1529 | validate_global_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1530 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1531 | int j; |
| 1532 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1533 | int res = (validate_ntype(tree, global_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1534 | && is_even(nch) && (nch >= 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1535 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1536 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1537 | res = (validate_name(CHILD(tree, 0), "global") |
| 1538 | && validate_ntype(CHILD(tree, 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1539 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1540 | res = (validate_comma(CHILD(tree, j)) |
| 1541 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1542 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1543 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1544 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1545 | |
| 1546 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1547 | /* exec_stmt: |
| 1548 | * |
| 1549 | * 'exec' expr ['in' test [',' test]] |
| 1550 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1551 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1552 | validate_exec_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1553 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1554 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1555 | int res = (validate_ntype(tree, exec_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1556 | && ((nch == 2) || (nch == 4) || (nch == 6)) |
| 1557 | && validate_name(CHILD(tree, 0), "exec") |
| 1558 | && validate_expr(CHILD(tree, 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1559 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1560 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1561 | err_string("Illegal exec statement."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1562 | if (res && (nch > 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1563 | res = (validate_name(CHILD(tree, 2), "in") |
| 1564 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1565 | if (res && (nch == 6)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1566 | res = (validate_comma(CHILD(tree, 4)) |
| 1567 | && validate_test(CHILD(tree, 5))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1568 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1569 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1570 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1571 | |
| 1572 | |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1573 | /* assert_stmt: |
| 1574 | * |
| 1575 | * 'assert' test [',' test] |
| 1576 | */ |
| 1577 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1578 | validate_assert_stmt(node *tree) |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1579 | { |
| 1580 | int nch = NCH(tree); |
| 1581 | int res = (validate_ntype(tree, assert_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1582 | && ((nch == 2) || (nch == 4)) |
| 1583 | && (validate_name(CHILD(tree, 0), "__assert__") || |
| 1584 | validate_name(CHILD(tree, 0), "assert")) |
| 1585 | && validate_test(CHILD(tree, 1))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1586 | |
| 1587 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1588 | err_string("Illegal assert statement."); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1589 | if (res && (nch > 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1590 | res = (validate_comma(CHILD(tree, 2)) |
| 1591 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1592 | |
| 1593 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1594 | } |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1595 | |
| 1596 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1597 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1598 | validate_while(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1599 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1600 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1601 | int res = (validate_ntype(tree, while_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1602 | && ((nch == 4) || (nch == 7)) |
| 1603 | && validate_name(CHILD(tree, 0), "while") |
| 1604 | && validate_test(CHILD(tree, 1)) |
| 1605 | && validate_colon(CHILD(tree, 2)) |
| 1606 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1607 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1608 | if (res && (nch == 7)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1609 | res = (validate_name(CHILD(tree, 4), "else") |
| 1610 | && validate_colon(CHILD(tree, 5)) |
| 1611 | && validate_suite(CHILD(tree, 6))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1612 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1613 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1614 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1615 | |
| 1616 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1617 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1618 | validate_for(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1619 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1620 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1621 | int res = (validate_ntype(tree, for_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1622 | && ((nch == 6) || (nch == 9)) |
| 1623 | && validate_name(CHILD(tree, 0), "for") |
| 1624 | && validate_exprlist(CHILD(tree, 1)) |
| 1625 | && validate_name(CHILD(tree, 2), "in") |
| 1626 | && validate_testlist(CHILD(tree, 3)) |
| 1627 | && validate_colon(CHILD(tree, 4)) |
| 1628 | && validate_suite(CHILD(tree, 5))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1629 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1630 | if (res && (nch == 9)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1631 | res = (validate_name(CHILD(tree, 6), "else") |
| 1632 | && validate_colon(CHILD(tree, 7)) |
| 1633 | && validate_suite(CHILD(tree, 8))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1634 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1635 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1636 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1637 | |
| 1638 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1639 | /* try_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1640 | * 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1641 | * | 'try' ':' suite 'finally' ':' suite |
| 1642 | * |
| 1643 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1644 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1645 | validate_try(tree) |
| 1646 | node *tree; |
| 1647 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1648 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1649 | int pos = 3; |
| 1650 | int res = (validate_ntype(tree, try_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1651 | && (nch >= 6) && ((nch % 3) == 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1652 | |
| 1653 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1654 | res = (validate_name(CHILD(tree, 0), "try") |
| 1655 | && validate_colon(CHILD(tree, 1)) |
| 1656 | && validate_suite(CHILD(tree, 2)) |
| 1657 | && validate_colon(CHILD(tree, nch - 2)) |
| 1658 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1659 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1660 | const char* name = "execpt"; |
| 1661 | char buffer[60]; |
| 1662 | if (TYPE(CHILD(tree, nch - 3)) != except_clause) |
| 1663 | name = STR(CHILD(tree, nch - 3)); |
| 1664 | (void) sprintf(buffer, |
| 1665 | "Illegal number of children for try/%s node.", name); |
| 1666 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1667 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1668 | /* Skip past except_clause sections: */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1669 | while (res && (TYPE(CHILD(tree, pos)) == except_clause)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1670 | res = (validate_except_clause(CHILD(tree, pos)) |
| 1671 | && validate_colon(CHILD(tree, pos + 1)) |
| 1672 | && validate_suite(CHILD(tree, pos + 2))); |
| 1673 | pos += 3; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1674 | } |
| 1675 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1676 | res = validate_ntype(CHILD(tree, pos), NAME); |
| 1677 | if (res && (strcmp(STR(CHILD(tree, pos)), "finally") == 0)) |
| 1678 | res = (validate_numnodes(tree, 6, "try/finally") |
| 1679 | && validate_colon(CHILD(tree, 4)) |
| 1680 | && validate_suite(CHILD(tree, 5))); |
| 1681 | else if (res) { |
| 1682 | if (nch == (pos + 3)) { |
| 1683 | res = ((strcmp(STR(CHILD(tree, pos)), "except") == 0) |
| 1684 | || (strcmp(STR(CHILD(tree, pos)), "else") == 0)); |
| 1685 | if (!res) |
| 1686 | err_string("Illegal trailing triple in try statement."); |
| 1687 | } |
| 1688 | else if (nch == (pos + 6)) { |
| 1689 | res = (validate_name(CHILD(tree, pos), "except") |
| 1690 | && validate_colon(CHILD(tree, pos + 1)) |
| 1691 | && validate_suite(CHILD(tree, pos + 2)) |
| 1692 | && validate_name(CHILD(tree, pos + 3), "else")); |
| 1693 | } |
| 1694 | else |
| 1695 | res = validate_numnodes(tree, pos + 3, "try/except"); |
| 1696 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1697 | } |
| 1698 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1699 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1700 | |
| 1701 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1702 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1703 | validate_except_clause(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1704 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1705 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1706 | int res = (validate_ntype(tree, except_clause) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1707 | && ((nch == 1) || (nch == 2) || (nch == 4)) |
| 1708 | && validate_name(CHILD(tree, 0), "except")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1709 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1710 | if (res && (nch > 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1711 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1712 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1713 | res = (validate_comma(CHILD(tree, 2)) |
| 1714 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1715 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1716 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1717 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1718 | |
| 1719 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1720 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1721 | validate_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1722 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1723 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1724 | int res = validate_ntype(tree, test) && is_odd(nch); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1725 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1726 | if (res && (TYPE(CHILD(tree, 0)) == lambdef)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1727 | res = ((nch == 1) |
| 1728 | && validate_lambdef(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1729 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1730 | int pos; |
| 1731 | res = validate_and_test(CHILD(tree, 0)); |
| 1732 | for (pos = 1; res && (pos < nch); pos += 2) |
| 1733 | res = (validate_name(CHILD(tree, pos), "or") |
| 1734 | && validate_and_test(CHILD(tree, pos + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1735 | } |
| 1736 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1737 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1738 | |
| 1739 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1740 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1741 | validate_and_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1742 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1743 | int pos; |
| 1744 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1745 | int res = (validate_ntype(tree, and_test) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1746 | && is_odd(nch) |
| 1747 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1748 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1749 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1750 | res = (validate_name(CHILD(tree, pos), "and") |
| 1751 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1752 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1753 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1754 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1755 | |
| 1756 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1757 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1758 | validate_not_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1759 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1760 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1761 | int res = validate_ntype(tree, not_test) && ((nch == 1) || (nch == 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1762 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1763 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1764 | if (nch == 2) |
| 1765 | res = (validate_name(CHILD(tree, 0), "not") |
| 1766 | && validate_not_test(CHILD(tree, 1))); |
| 1767 | else if (nch == 1) |
| 1768 | res = validate_comparison(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1769 | } |
| 1770 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1771 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1772 | |
| 1773 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1774 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1775 | validate_comparison(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1776 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1777 | int pos; |
| 1778 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1779 | int res = (validate_ntype(tree, comparison) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1780 | && is_odd(nch) |
| 1781 | && validate_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1782 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1783 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1784 | res = (validate_comp_op(CHILD(tree, pos)) |
| 1785 | && validate_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1786 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1787 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1788 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1789 | |
| 1790 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1791 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1792 | validate_comp_op(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1793 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1794 | int res = 0; |
| 1795 | int nch = NCH(tree); |
| 1796 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1797 | if (!validate_ntype(tree, comp_op)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1798 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1799 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1800 | /* |
| 1801 | * Only child will be a terminal with a well-defined symbolic name |
| 1802 | * or a NAME with a string of either 'is' or 'in' |
| 1803 | */ |
| 1804 | tree = CHILD(tree, 0); |
| 1805 | switch (TYPE(tree)) { |
| 1806 | case LESS: |
| 1807 | case GREATER: |
| 1808 | case EQEQUAL: |
| 1809 | case EQUAL: |
| 1810 | case LESSEQUAL: |
| 1811 | case GREATEREQUAL: |
| 1812 | case NOTEQUAL: |
| 1813 | res = 1; |
| 1814 | break; |
| 1815 | case NAME: |
| 1816 | res = ((strcmp(STR(tree), "in") == 0) |
| 1817 | || (strcmp(STR(tree), "is") == 0)); |
| 1818 | if (!res) { |
| 1819 | char buff[128]; |
| 1820 | (void) sprintf(buff, "Illegal operator: '%s'.", STR(tree)); |
| 1821 | err_string(buff); |
| 1822 | } |
| 1823 | break; |
| 1824 | default: |
| 1825 | err_string("Illegal comparison operator type."); |
| 1826 | break; |
| 1827 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1828 | } |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 1829 | else if ((res = validate_numnodes(tree, 2, "comp_op")) != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1830 | res = (validate_ntype(CHILD(tree, 0), NAME) |
| 1831 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1832 | && (((strcmp(STR(CHILD(tree, 0)), "is") == 0) |
| 1833 | && (strcmp(STR(CHILD(tree, 1)), "not") == 0)) |
| 1834 | || ((strcmp(STR(CHILD(tree, 0)), "not") == 0) |
| 1835 | && (strcmp(STR(CHILD(tree, 1)), "in") == 0)))); |
| 1836 | if (!res && !PyErr_Occurred()) |
| 1837 | err_string("Unknown comparison operator."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1838 | } |
| 1839 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1840 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1841 | |
| 1842 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1843 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1844 | validate_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1845 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1846 | int j; |
| 1847 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1848 | int res = (validate_ntype(tree, expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1849 | && is_odd(nch) |
| 1850 | && validate_xor_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1851 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1852 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1853 | res = (validate_xor_expr(CHILD(tree, j)) |
| 1854 | && validate_vbar(CHILD(tree, j - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1855 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1856 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1857 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1858 | |
| 1859 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1860 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1861 | validate_xor_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1862 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1863 | int j; |
| 1864 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1865 | int res = (validate_ntype(tree, xor_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1866 | && is_odd(nch) |
| 1867 | && validate_and_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1868 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1869 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1870 | res = (validate_circumflex(CHILD(tree, j - 1)) |
| 1871 | && validate_and_expr(CHILD(tree, j))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1872 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1873 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1874 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1875 | |
| 1876 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1877 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1878 | validate_and_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1879 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1880 | int pos; |
| 1881 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1882 | int res = (validate_ntype(tree, and_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1883 | && is_odd(nch) |
| 1884 | && validate_shift_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1885 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1886 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1887 | res = (validate_ampersand(CHILD(tree, pos)) |
| 1888 | && validate_shift_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1889 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1890 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1891 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1892 | |
| 1893 | |
| 1894 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1895 | validate_chain_two_ops(tree, termvalid, op1, op2) |
| 1896 | node *tree; |
| 1897 | int (*termvalid)(); |
| 1898 | int op1; |
| 1899 | int op2; |
| 1900 | { |
| 1901 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1902 | int nch = NCH(tree); |
| 1903 | int res = (is_odd(nch) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1904 | && (*termvalid)(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1905 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1906 | for ( ; res && (pos < nch); pos += 2) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1907 | if (TYPE(CHILD(tree, pos)) != op1) |
| 1908 | res = validate_ntype(CHILD(tree, pos), op2); |
| 1909 | if (res) |
| 1910 | res = (*termvalid)(CHILD(tree, pos + 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1911 | } |
| 1912 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1913 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1914 | |
| 1915 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1916 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1917 | validate_shift_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1918 | { |
| 1919 | return (validate_ntype(tree, shift_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1920 | && validate_chain_two_ops(tree, validate_arith_expr, |
| 1921 | LEFTSHIFT, RIGHTSHIFT)); |
| 1922 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1923 | |
| 1924 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1925 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1926 | validate_arith_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1927 | { |
| 1928 | return (validate_ntype(tree, arith_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1929 | && validate_chain_two_ops(tree, validate_term, PLUS, MINUS)); |
| 1930 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1931 | |
| 1932 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1933 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1934 | validate_term(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1935 | { |
| 1936 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1937 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1938 | int res = (validate_ntype(tree, term) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1939 | && is_odd(nch) |
| 1940 | && validate_factor(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1941 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1942 | for ( ; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1943 | res = (((TYPE(CHILD(tree, pos)) == STAR) |
| 1944 | || (TYPE(CHILD(tree, pos)) == SLASH) |
| 1945 | || (TYPE(CHILD(tree, pos)) == PERCENT)) |
| 1946 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1947 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1948 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1949 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1950 | |
| 1951 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1952 | /* factor: |
| 1953 | * |
| 1954 | * factor: ('+'|'-'|'~') factor | power |
| 1955 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1956 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1957 | validate_factor(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1958 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1959 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1960 | int res = (validate_ntype(tree, factor) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1961 | && (((nch == 2) |
| 1962 | && ((TYPE(CHILD(tree, 0)) == PLUS) |
| 1963 | || (TYPE(CHILD(tree, 0)) == MINUS) |
| 1964 | || (TYPE(CHILD(tree, 0)) == TILDE)) |
| 1965 | && validate_factor(CHILD(tree, 1))) |
| 1966 | || ((nch == 1) |
| 1967 | && validate_power(CHILD(tree, 0))))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1968 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1969 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1970 | |
| 1971 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1972 | /* power: |
| 1973 | * |
| 1974 | * power: atom trailer* ('**' factor)* |
| 1975 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1976 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1977 | validate_power(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1978 | { |
| 1979 | int pos = 1; |
| 1980 | int nch = NCH(tree); |
| 1981 | int res = (validate_ntype(tree, power) && (nch >= 1) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1982 | && validate_atom(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1983 | |
| 1984 | while (res && (pos < nch) && (TYPE(CHILD(tree, pos)) == trailer)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1985 | res = validate_trailer(CHILD(tree, pos++)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1986 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1987 | if (!is_even(nch - pos)) { |
| 1988 | err_string("Illegal number of nodes for 'power'."); |
| 1989 | return (0); |
| 1990 | } |
| 1991 | for ( ; res && (pos < (nch - 1)); pos += 2) |
| 1992 | res = (validate_doublestar(CHILD(tree, pos)) |
| 1993 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1994 | } |
| 1995 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1996 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1997 | |
| 1998 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1999 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2000 | validate_atom(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2001 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2002 | int pos; |
| 2003 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2004 | int res = validate_ntype(tree, atom) && (nch >= 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2005 | |
| 2006 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2007 | switch (TYPE(CHILD(tree, 0))) { |
| 2008 | case LPAR: |
| 2009 | res = ((nch <= 3) |
| 2010 | && (validate_rparen(CHILD(tree, nch - 1)))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2011 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2012 | if (res && (nch == 3)) |
| 2013 | res = validate_testlist(CHILD(tree, 1)); |
| 2014 | break; |
| 2015 | case LSQB: |
| 2016 | res = ((nch <= 3) |
| 2017 | && validate_ntype(CHILD(tree, nch - 1), RSQB)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2018 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2019 | if (res && (nch == 3)) |
| 2020 | res = validate_testlist(CHILD(tree, 1)); |
| 2021 | break; |
| 2022 | case LBRACE: |
| 2023 | res = ((nch <= 3) |
| 2024 | && validate_ntype(CHILD(tree, nch - 1), RBRACE)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2025 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2026 | if (res && (nch == 3)) |
| 2027 | res = validate_dictmaker(CHILD(tree, 1)); |
| 2028 | break; |
| 2029 | case BACKQUOTE: |
| 2030 | res = ((nch == 3) |
| 2031 | && validate_testlist(CHILD(tree, 1)) |
| 2032 | && validate_ntype(CHILD(tree, 2), BACKQUOTE)); |
| 2033 | break; |
| 2034 | case NAME: |
| 2035 | case NUMBER: |
| 2036 | res = (nch == 1); |
| 2037 | break; |
| 2038 | case STRING: |
| 2039 | for (pos = 1; res && (pos < nch); ++pos) |
| 2040 | res = validate_ntype(CHILD(tree, pos), STRING); |
| 2041 | break; |
| 2042 | default: |
| 2043 | res = 0; |
| 2044 | break; |
| 2045 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2046 | } |
| 2047 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2048 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2049 | |
| 2050 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2051 | /* funcdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2052 | * 'def' NAME parameters ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2053 | * |
| 2054 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2055 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2056 | validate_funcdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2057 | { |
| 2058 | return (validate_ntype(tree, funcdef) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2059 | && validate_numnodes(tree, 5, "funcdef") |
| 2060 | && validate_name(CHILD(tree, 0), "def") |
| 2061 | && validate_ntype(CHILD(tree, 1), NAME) |
| 2062 | && validate_colon(CHILD(tree, 3)) |
| 2063 | && validate_parameters(CHILD(tree, 2)) |
| 2064 | && validate_suite(CHILD(tree, 4))); |
| 2065 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2066 | |
| 2067 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2068 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2069 | validate_lambdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2070 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2071 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2072 | int res = (validate_ntype(tree, lambdef) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2073 | && ((nch == 3) || (nch == 4)) |
| 2074 | && validate_name(CHILD(tree, 0), "lambda") |
| 2075 | && validate_colon(CHILD(tree, nch - 2)) |
| 2076 | && validate_test(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2077 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2078 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2079 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2080 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2081 | (void) validate_numnodes(tree, 3, "lambdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2082 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2083 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2084 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2085 | |
| 2086 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2087 | /* arglist: |
| 2088 | * |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2089 | * (argument ',')* (argument* [','] | '*' test [',' '**' test] | '**' test) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2090 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2091 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2092 | validate_arglist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2093 | { |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2094 | int nch = NCH(tree); |
| 2095 | int i, ok; |
| 2096 | node *last; |
| 2097 | |
| 2098 | if (nch <= 0) |
| 2099 | /* raise the right error from having an invalid number of children */ |
| 2100 | return validate_numnodes(tree, nch + 1, "arglist"); |
| 2101 | |
| 2102 | last = CHILD(tree, nch - 1); |
| 2103 | if (TYPE(last) == test) { |
| 2104 | /* Extended call syntax introduced in Python 1.6 has been used; |
| 2105 | * validate and strip that off and continue; |
| 2106 | * adjust nch to perform the cut, and ensure resulting nch is even |
| 2107 | * (validation of the first part doesn't require that). |
| 2108 | */ |
| 2109 | if (nch < 2) { |
| 2110 | validate_numnodes(tree, nch + 1, "arglist"); |
| 2111 | return 0; |
| 2112 | } |
| 2113 | ok = validate_test(last); |
| 2114 | if (ok) { |
| 2115 | node *prev = CHILD(tree, nch - 2); |
| 2116 | /* next must be '*' or '**' */ |
| 2117 | if (validate_doublestar(prev)) { |
| 2118 | nch -= 2; |
| 2119 | if (nch >= 3) { |
| 2120 | /* may include: '*' test ',' */ |
| 2121 | last = CHILD(tree, nch - 1); |
| 2122 | prev = CHILD(tree, nch - 2); |
| 2123 | if (TYPE(prev) == test) { |
| 2124 | ok = validate_comma(last) |
| 2125 | && validate_test(prev) |
| 2126 | && validate_star(CHILD(tree, nch - 3)); |
| 2127 | if (ok) |
| 2128 | nch -= 3; |
| 2129 | } |
| 2130 | /* otherwise, nothing special */ |
| 2131 | } |
| 2132 | } |
| 2133 | else { |
| 2134 | /* must be only: '*' test */ |
| 2135 | PyErr_Clear(); |
| 2136 | ok = validate_star(prev); |
| 2137 | nch -= 2; |
| 2138 | } |
| 2139 | if (ok && is_odd(nch)) { |
| 2140 | /* Illegal number of nodes before extended call syntax; |
| 2141 | * validation of the "normal" arguments does not require |
| 2142 | * a trailing comma, but requiring an even number of |
| 2143 | * children will effect the same requirement. |
| 2144 | */ |
| 2145 | return validate_numnodes(tree, nch + 1, "arglist"); |
| 2146 | } |
| 2147 | } |
| 2148 | } |
| 2149 | /* what remains must be: (argument ",")* [argument [","]] */ |
| 2150 | i = 0; |
| 2151 | while (ok && nch - i >= 2) { |
| 2152 | ok = validate_argument(CHILD(tree, i)) |
| 2153 | && validate_comma(CHILD(tree, i + 1)); |
| 2154 | i += 2; |
| 2155 | } |
| 2156 | if (ok && i < nch) { |
| 2157 | ok = validate_comma(CHILD(tree, i)); |
| 2158 | ++i; |
| 2159 | } |
| 2160 | if (i != nch) { |
| 2161 | /* internal error! */ |
| 2162 | ok = 0; |
| 2163 | err_string("arglist: internal error; nch != i"); |
| 2164 | } |
| 2165 | return (ok); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2166 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2167 | |
| 2168 | |
| 2169 | |
| 2170 | /* argument: |
| 2171 | * |
| 2172 | * [test '='] test |
| 2173 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2174 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2175 | validate_argument(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2176 | { |
| 2177 | int nch = NCH(tree); |
| 2178 | int res = (validate_ntype(tree, argument) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2179 | && ((nch == 1) || (nch == 3)) |
| 2180 | && validate_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2181 | |
| 2182 | if (res && (nch == 3)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2183 | res = (validate_equal(CHILD(tree, 1)) |
| 2184 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2185 | |
| 2186 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2187 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2188 | |
| 2189 | |
| 2190 | |
| 2191 | /* trailer: |
| 2192 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2193 | * '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2194 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2195 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2196 | validate_trailer(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2197 | { |
| 2198 | int nch = NCH(tree); |
| 2199 | int res = validate_ntype(tree, trailer) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2200 | |
| 2201 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2202 | switch (TYPE(CHILD(tree, 0))) { |
| 2203 | case LPAR: |
| 2204 | res = validate_rparen(CHILD(tree, nch - 1)); |
| 2205 | if (res && (nch == 3)) |
| 2206 | res = validate_arglist(CHILD(tree, 1)); |
| 2207 | break; |
| 2208 | case LSQB: |
| 2209 | res = (validate_numnodes(tree, 3, "trailer") |
| 2210 | && validate_subscriptlist(CHILD(tree, 1)) |
| 2211 | && validate_ntype(CHILD(tree, 2), RSQB)); |
| 2212 | break; |
| 2213 | case DOT: |
| 2214 | res = (validate_numnodes(tree, 2, "trailer") |
| 2215 | && validate_ntype(CHILD(tree, 1), NAME)); |
| 2216 | break; |
| 2217 | default: |
| 2218 | res = 0; |
| 2219 | break; |
| 2220 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2221 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2222 | else { |
| 2223 | (void) validate_numnodes(tree, 2, "trailer"); |
| 2224 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2225 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2226 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2227 | |
| 2228 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2229 | /* subscriptlist: |
| 2230 | * |
| 2231 | * subscript (',' subscript)* [','] |
| 2232 | */ |
| 2233 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2234 | validate_subscriptlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2235 | { |
| 2236 | return (validate_repeating_list(tree, subscriptlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2237 | validate_subscript, "subscriptlist")); |
| 2238 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2239 | |
| 2240 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2241 | /* subscript: |
| 2242 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2243 | * '.' '.' '.' | test | [test] ':' [test] [sliceop] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2244 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2245 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2246 | validate_subscript(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2247 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2248 | int offset = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2249 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2250 | int res = validate_ntype(tree, subscript) && (nch >= 1) && (nch <= 4); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2251 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2252 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2253 | if (!PyErr_Occurred()) |
| 2254 | err_string("invalid number of arguments for subscript node"); |
| 2255 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2256 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2257 | if (TYPE(CHILD(tree, 0)) == DOT) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2258 | /* take care of ('.' '.' '.') possibility */ |
| 2259 | return (validate_numnodes(tree, 3, "subscript") |
| 2260 | && validate_dot(CHILD(tree, 0)) |
| 2261 | && validate_dot(CHILD(tree, 1)) |
| 2262 | && validate_dot(CHILD(tree, 2))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2263 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2264 | if (TYPE(CHILD(tree, 0)) == test) |
| 2265 | res = validate_test(CHILD(tree, 0)); |
| 2266 | else |
| 2267 | res = validate_colon(CHILD(tree, 0)); |
| 2268 | return (res); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2269 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2270 | /* Must be [test] ':' [test] [sliceop], |
| 2271 | * but at least one of the optional components will |
| 2272 | * be present, but we don't know which yet. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2273 | */ |
| 2274 | if ((TYPE(CHILD(tree, 0)) != COLON) || (nch == 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2275 | res = validate_test(CHILD(tree, 0)); |
| 2276 | offset = 1; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2277 | } |
| 2278 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2279 | res = validate_colon(CHILD(tree, offset)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2280 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2281 | int rem = nch - ++offset; |
| 2282 | if (rem) { |
| 2283 | if (TYPE(CHILD(tree, offset)) == test) { |
| 2284 | res = validate_test(CHILD(tree, offset)); |
| 2285 | ++offset; |
| 2286 | --rem; |
| 2287 | } |
| 2288 | if (res && rem) |
| 2289 | res = validate_sliceop(CHILD(tree, offset)); |
| 2290 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2291 | } |
| 2292 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2293 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2294 | |
| 2295 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2296 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2297 | validate_sliceop(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2298 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2299 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2300 | int res = ((nch == 1) || validate_numnodes(tree, 2, "sliceop")) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2301 | && validate_ntype(tree, sliceop); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2302 | if (!res && !PyErr_Occurred()) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2303 | res = validate_numnodes(tree, 1, "sliceop"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2304 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2305 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2306 | res = validate_colon(CHILD(tree, 0)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2307 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2308 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2309 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2310 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2311 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2312 | |
| 2313 | |
| 2314 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2315 | validate_exprlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2316 | { |
| 2317 | return (validate_repeating_list(tree, exprlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2318 | validate_expr, "exprlist")); |
| 2319 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2320 | |
| 2321 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2322 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2323 | validate_dictmaker(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2324 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2325 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2326 | int res = (validate_ntype(tree, dictmaker) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2327 | && (nch >= 3) |
| 2328 | && validate_test(CHILD(tree, 0)) |
| 2329 | && validate_colon(CHILD(tree, 1)) |
| 2330 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2331 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2332 | if (res && ((nch % 4) == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2333 | res = validate_comma(CHILD(tree, --nch)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2334 | else if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2335 | res = ((nch % 4) == 3); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2336 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2337 | if (res && (nch > 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2338 | int pos = 3; |
| 2339 | /* ( ',' test ':' test )* */ |
| 2340 | while (res && (pos < nch)) { |
| 2341 | res = (validate_comma(CHILD(tree, pos)) |
| 2342 | && validate_test(CHILD(tree, pos + 1)) |
| 2343 | && validate_colon(CHILD(tree, pos + 2)) |
| 2344 | && validate_test(CHILD(tree, pos + 3))); |
| 2345 | pos += 4; |
| 2346 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2347 | } |
| 2348 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2349 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2350 | |
| 2351 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2352 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2353 | validate_eval_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2354 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2355 | int pos; |
| 2356 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2357 | int res = (validate_ntype(tree, eval_input) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2358 | && (nch >= 2) |
| 2359 | && validate_testlist(CHILD(tree, 0)) |
| 2360 | && validate_ntype(CHILD(tree, nch - 1), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2361 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2362 | for (pos = 1; res && (pos < (nch - 1)); ++pos) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2363 | res = validate_ntype(CHILD(tree, pos), NEWLINE); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2364 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2365 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2366 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2367 | |
| 2368 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2369 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2370 | validate_node(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2371 | { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2372 | int nch = 0; /* num. children on current node */ |
| 2373 | int res = 1; /* result value */ |
| 2374 | node* next = 0; /* node to process after this one */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2375 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2376 | while (res & (tree != 0)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2377 | nch = NCH(tree); |
| 2378 | next = 0; |
| 2379 | switch (TYPE(tree)) { |
| 2380 | /* |
| 2381 | * Definition nodes. |
| 2382 | */ |
| 2383 | case funcdef: |
| 2384 | res = validate_funcdef(tree); |
| 2385 | break; |
| 2386 | case classdef: |
| 2387 | res = validate_class(tree); |
| 2388 | break; |
| 2389 | /* |
| 2390 | * "Trivial" parse tree nodes. |
| 2391 | * (Why did I call these trivial?) |
| 2392 | */ |
| 2393 | case stmt: |
| 2394 | res = validate_stmt(tree); |
| 2395 | break; |
| 2396 | case small_stmt: |
| 2397 | /* |
| 2398 | * expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt |
| 2399 | * | import_stmt | global_stmt | exec_stmt | assert_stmt |
| 2400 | */ |
| 2401 | res = validate_small_stmt(tree); |
| 2402 | break; |
| 2403 | case flow_stmt: |
| 2404 | res = (validate_numnodes(tree, 1, "flow_stmt") |
| 2405 | && ((TYPE(CHILD(tree, 0)) == break_stmt) |
| 2406 | || (TYPE(CHILD(tree, 0)) == continue_stmt) |
| 2407 | || (TYPE(CHILD(tree, 0)) == return_stmt) |
| 2408 | || (TYPE(CHILD(tree, 0)) == raise_stmt))); |
| 2409 | if (res) |
| 2410 | next = CHILD(tree, 0); |
| 2411 | else if (nch == 1) |
| 2412 | err_string("Illegal flow_stmt type."); |
| 2413 | break; |
| 2414 | /* |
| 2415 | * Compound statements. |
| 2416 | */ |
| 2417 | case simple_stmt: |
| 2418 | res = validate_simple_stmt(tree); |
| 2419 | break; |
| 2420 | case compound_stmt: |
| 2421 | res = validate_compound_stmt(tree); |
| 2422 | break; |
| 2423 | /* |
| 2424 | * Fundemental statements. |
| 2425 | */ |
| 2426 | case expr_stmt: |
| 2427 | res = validate_expr_stmt(tree); |
| 2428 | break; |
| 2429 | case print_stmt: |
| 2430 | res = validate_print_stmt(tree); |
| 2431 | break; |
| 2432 | case del_stmt: |
| 2433 | res = validate_del_stmt(tree); |
| 2434 | break; |
| 2435 | case pass_stmt: |
| 2436 | res = (validate_numnodes(tree, 1, "pass") |
| 2437 | && validate_name(CHILD(tree, 0), "pass")); |
| 2438 | break; |
| 2439 | case break_stmt: |
| 2440 | res = (validate_numnodes(tree, 1, "break") |
| 2441 | && validate_name(CHILD(tree, 0), "break")); |
| 2442 | break; |
| 2443 | case continue_stmt: |
| 2444 | res = (validate_numnodes(tree, 1, "continue") |
| 2445 | && validate_name(CHILD(tree, 0), "continue")); |
| 2446 | break; |
| 2447 | case return_stmt: |
| 2448 | res = validate_return_stmt(tree); |
| 2449 | break; |
| 2450 | case raise_stmt: |
| 2451 | res = validate_raise_stmt(tree); |
| 2452 | break; |
| 2453 | case import_stmt: |
| 2454 | res = validate_import_stmt(tree); |
| 2455 | break; |
| 2456 | case global_stmt: |
| 2457 | res = validate_global_stmt(tree); |
| 2458 | break; |
| 2459 | case exec_stmt: |
| 2460 | res = validate_exec_stmt(tree); |
| 2461 | break; |
| 2462 | case assert_stmt: |
| 2463 | res = validate_assert_stmt(tree); |
| 2464 | break; |
| 2465 | case if_stmt: |
| 2466 | res = validate_if(tree); |
| 2467 | break; |
| 2468 | case while_stmt: |
| 2469 | res = validate_while(tree); |
| 2470 | break; |
| 2471 | case for_stmt: |
| 2472 | res = validate_for(tree); |
| 2473 | break; |
| 2474 | case try_stmt: |
| 2475 | res = validate_try(tree); |
| 2476 | break; |
| 2477 | case suite: |
| 2478 | res = validate_suite(tree); |
| 2479 | break; |
| 2480 | /* |
| 2481 | * Expression nodes. |
| 2482 | */ |
| 2483 | case testlist: |
| 2484 | res = validate_testlist(tree); |
| 2485 | break; |
| 2486 | case test: |
| 2487 | res = validate_test(tree); |
| 2488 | break; |
| 2489 | case and_test: |
| 2490 | res = validate_and_test(tree); |
| 2491 | break; |
| 2492 | case not_test: |
| 2493 | res = validate_not_test(tree); |
| 2494 | break; |
| 2495 | case comparison: |
| 2496 | res = validate_comparison(tree); |
| 2497 | break; |
| 2498 | case exprlist: |
| 2499 | res = validate_exprlist(tree); |
| 2500 | break; |
| 2501 | case comp_op: |
| 2502 | res = validate_comp_op(tree); |
| 2503 | break; |
| 2504 | case expr: |
| 2505 | res = validate_expr(tree); |
| 2506 | break; |
| 2507 | case xor_expr: |
| 2508 | res = validate_xor_expr(tree); |
| 2509 | break; |
| 2510 | case and_expr: |
| 2511 | res = validate_and_expr(tree); |
| 2512 | break; |
| 2513 | case shift_expr: |
| 2514 | res = validate_shift_expr(tree); |
| 2515 | break; |
| 2516 | case arith_expr: |
| 2517 | res = validate_arith_expr(tree); |
| 2518 | break; |
| 2519 | case term: |
| 2520 | res = validate_term(tree); |
| 2521 | break; |
| 2522 | case factor: |
| 2523 | res = validate_factor(tree); |
| 2524 | break; |
| 2525 | case power: |
| 2526 | res = validate_power(tree); |
| 2527 | break; |
| 2528 | case atom: |
| 2529 | res = validate_atom(tree); |
| 2530 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2531 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2532 | default: |
| 2533 | /* Hopefully never reached! */ |
| 2534 | err_string("Unrecogniged node type."); |
| 2535 | res = 0; |
| 2536 | break; |
| 2537 | } |
| 2538 | tree = next; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2539 | } |
| 2540 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2541 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2542 | |
| 2543 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2544 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2545 | validate_expr_tree(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2546 | { |
| 2547 | int res = validate_eval_input(tree); |
| 2548 | |
| 2549 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2550 | err_string("Could not validate expression tuple."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2551 | |
| 2552 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2553 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2554 | |
| 2555 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2556 | /* file_input: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2557 | * (NEWLINE | stmt)* ENDMARKER |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2558 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2559 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2560 | validate_file_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2561 | { |
| 2562 | int j = 0; |
| 2563 | int nch = NCH(tree) - 1; |
| 2564 | int res = ((nch >= 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2565 | && validate_ntype(CHILD(tree, nch), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2566 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2567 | for ( ; res && (j < nch); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2568 | if (TYPE(CHILD(tree, j)) == stmt) |
| 2569 | res = validate_stmt(CHILD(tree, j)); |
| 2570 | else |
| 2571 | res = validate_newline(CHILD(tree, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2572 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2573 | /* This stays in to prevent any internal failues from getting to the |
| 2574 | * user. Hopefully, this won't be needed. If a user reports getting |
| 2575 | * this, we have some debugging to do. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2576 | */ |
| 2577 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2578 | err_string("VALIDATION FAILURE: report this to the maintainer!."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2579 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2580 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2581 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2582 | |
| 2583 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2584 | static PyObject* |
| 2585 | pickle_constructor = NULL; |
| 2586 | |
| 2587 | |
| 2588 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2589 | parser__pickler(PyObject *self, PyObject *args) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2590 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 2591 | NOTE(ARGUNUSED(self)) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2592 | PyObject *result = NULL; |
| 2593 | PyObject *ast = NULL; |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2594 | PyObject *empty_dict = NULL; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2595 | |
| 2596 | if (PyArg_ParseTuple(args, "O!:_pickler", &PyAST_Type, &ast)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2597 | PyObject *newargs; |
| 2598 | PyObject *tuple; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2599 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2600 | if ((empty_dict = PyDict_New()) == NULL) |
| 2601 | goto finally; |
| 2602 | if ((newargs = Py_BuildValue("Oi", ast, 1)) == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2603 | goto finally; |
| 2604 | tuple = parser_ast2tuple((PyAST_Object*)NULL, newargs, empty_dict); |
| 2605 | if (tuple != NULL) { |
| 2606 | result = Py_BuildValue("O(O)", pickle_constructor, tuple); |
| 2607 | Py_DECREF(tuple); |
| 2608 | } |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2609 | Py_DECREF(empty_dict); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2610 | Py_DECREF(newargs); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2611 | } |
| 2612 | finally: |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2613 | Py_XDECREF(empty_dict); |
| 2614 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2615 | return (result); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2616 | } |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2617 | |
| 2618 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2619 | /* Functions exported by this module. Most of this should probably |
| 2620 | * be converted into an AST object with methods, but that is better |
| 2621 | * done directly in Python, allowing subclasses to be created directly. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2622 | * We'd really have to write a wrapper around it all anyway to allow |
| 2623 | * inheritance. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2624 | */ |
| 2625 | static PyMethodDef parser_functions[] = { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2626 | {"ast2tuple", (PyCFunction)parser_ast2tuple, PUBLIC_METHOD_TYPE, |
| 2627 | "Creates a tuple-tree representation of an AST."}, |
| 2628 | {"ast2list", (PyCFunction)parser_ast2list, PUBLIC_METHOD_TYPE, |
| 2629 | "Creates a list-tree representation of an AST."}, |
| 2630 | {"compileast", (PyCFunction)parser_compileast, PUBLIC_METHOD_TYPE, |
| 2631 | "Compiles an AST object into a code object."}, |
| 2632 | {"expr", (PyCFunction)parser_expr, PUBLIC_METHOD_TYPE, |
| 2633 | "Creates an AST object from an expression."}, |
| 2634 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
| 2635 | "Determines if an AST object was created from an expression."}, |
| 2636 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
| 2637 | "Determines if an AST object was created from a suite."}, |
| 2638 | {"suite", (PyCFunction)parser_suite, PUBLIC_METHOD_TYPE, |
| 2639 | "Creates an AST object from a suite."}, |
| 2640 | {"sequence2ast", (PyCFunction)parser_tuple2ast, PUBLIC_METHOD_TYPE, |
| 2641 | "Creates an AST object from a tree representation."}, |
| 2642 | {"tuple2ast", (PyCFunction)parser_tuple2ast, PUBLIC_METHOD_TYPE, |
| 2643 | "Creates an AST object from a tree representation."}, |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2644 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2645 | /* private stuff: support pickle module */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2646 | {"_pickler", (PyCFunction)parser__pickler, METH_VARARGS, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2647 | "Returns the pickle magic to allow ast objects to be pickled."}, |
| 2648 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 2649 | {NULL, NULL, 0, NULL} |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2650 | }; |
| 2651 | |
| 2652 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 2653 | DL_EXPORT(void) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2654 | initparser() |
| 2655 | { |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 2656 | PyObject* module; |
| 2657 | PyObject* dict; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2658 | |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 2659 | PyAST_Type.ob_type = &PyType_Type; |
| 2660 | module = Py_InitModule("parser", parser_functions); |
| 2661 | dict = PyModule_GetDict(module); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2662 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 2663 | if (parser_error == 0) |
| 2664 | parser_error = PyErr_NewException("parser.ParserError", NULL, NULL); |
| 2665 | else |
| 2666 | puts("parser module initialized more than once!"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2667 | |
| 2668 | if ((parser_error == 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2669 | || (PyDict_SetItemString(dict, "ParserError", parser_error) != 0)) { |
| 2670 | /* |
| 2671 | * This is serious. |
| 2672 | */ |
| 2673 | Py_FatalError("can't define parser.ParserError"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2674 | } |
| 2675 | /* |
| 2676 | * Nice to have, but don't cry if we fail. |
| 2677 | */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2678 | Py_INCREF(&PyAST_Type); |
| 2679 | PyDict_SetItemString(dict, "ASTType", (PyObject*)&PyAST_Type); |
| 2680 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2681 | PyDict_SetItemString(dict, "__copyright__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2682 | PyString_FromString(parser_copyright_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2683 | PyDict_SetItemString(dict, "__doc__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2684 | PyString_FromString(parser_doc_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2685 | PyDict_SetItemString(dict, "__version__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2686 | PyString_FromString(parser_version_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2687 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2688 | /* register to support pickling */ |
| 2689 | module = PyImport_ImportModule("copy_reg"); |
| 2690 | if (module != NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2691 | PyObject *func, *pickler; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2692 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2693 | func = PyObject_GetAttrString(module, "pickle"); |
| 2694 | pickle_constructor = PyDict_GetItemString(dict, "sequence2ast"); |
| 2695 | pickler = PyDict_GetItemString(dict, "_pickler"); |
| 2696 | Py_XINCREF(pickle_constructor); |
| 2697 | if ((func != NULL) && (pickle_constructor != NULL) |
| 2698 | && (pickler != NULL)) { |
| 2699 | PyObject *res; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2700 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2701 | res = PyObject_CallFunction( |
| 2702 | func, "OOO", &PyAST_Type, pickler, pickle_constructor); |
| 2703 | Py_XDECREF(res); |
| 2704 | } |
| 2705 | Py_XDECREF(func); |
| 2706 | Py_DECREF(module); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2707 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2708 | } |