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