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 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 29 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 30 | /* String constants used to initialize module attributes. |
| 31 | * |
| 32 | */ |
| 33 | static char* |
| 34 | parser_copyright_string |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 35 | = "Copyright 1995-1996 by Virginia Polytechnic Institute & State\n\ |
| 36 | University, Blacksburg, Virginia, USA, and Fred L. Drake, Jr., Reston,\n\ |
| 37 | Virginia, USA. Portions copyright 1991-1995 by Stichting Mathematisch\n\ |
| 38 | Centrum, Amsterdam, The Netherlands."; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 39 | |
| 40 | |
| 41 | static char* |
| 42 | parser_doc_string |
| 43 | = "This is an interface to Python's internal parser."; |
| 44 | |
| 45 | static char* |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 46 | parser_version_string = "0.4"; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 47 | |
| 48 | |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 49 | typedef PyObject* (*SeqMaker) Py_PROTO((int length)); |
| 50 | typedef void (*SeqInserter) Py_PROTO((PyObject* sequence, |
| 51 | int index, |
| 52 | PyObject* element)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 53 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 54 | /* The function below is copyrigthed by Stichting Mathematisch Centrum. The |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 55 | * original copyright statement is included below, and continues to apply |
| 56 | * in full to the function immediately following. All other material is |
| 57 | * original, copyrighted by Fred L. Drake, Jr. and Virginia Polytechnic |
| 58 | * Institute and State University. Changes were made to comply with the |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 59 | * new naming conventions. Added arguments to provide support for creating |
| 60 | * lists as well as tuples, and optionally including the line numbers. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 61 | */ |
| 62 | |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 63 | /*********************************************************** |
Guido van Rossum | 524b588 | 1995-01-04 19:10:35 +0000 | [diff] [blame] | 64 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 65 | The Netherlands. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 66 | |
| 67 | All Rights Reserved |
| 68 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 69 | Permission to use, copy, modify, and distribute this software and its |
| 70 | documentation for any purpose and without fee is hereby granted, |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 71 | 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] | 72 | both that copyright notice and this permission notice appear in |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 73 | supporting documentation, and that the names of Stichting Mathematisch |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 74 | Centrum or CWI or Corporation for National Research Initiatives or |
| 75 | CNRI not be used in advertising or publicity pertaining to |
| 76 | distribution of the software without specific, written prior |
| 77 | permission. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 78 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 79 | While CWI is the initial source for this software, a modified version |
| 80 | is made available by the Corporation for National Research Initiatives |
| 81 | (CNRI) at the Internet address ftp://ftp.python.org. |
| 82 | |
| 83 | STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| 84 | REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| 85 | MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| 86 | CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| 87 | DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 88 | PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 89 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 90 | PERFORMANCE OF THIS SOFTWARE. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 91 | |
| 92 | ******************************************************************/ |
| 93 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 94 | static PyObject* |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 95 | node2tuple(n, mkseq, addelem, lineno) |
| 96 | node *n; /* node to convert */ |
| 97 | SeqMaker mkseq; /* create sequence */ |
| 98 | SeqInserter addelem; /* func. to add elem. in seq. */ |
| 99 | int lineno; /* include line numbers? */ |
| 100 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 101 | if (n == NULL) { |
| 102 | Py_INCREF(Py_None); |
| 103 | return Py_None; |
| 104 | } |
| 105 | if (ISNONTERMINAL(TYPE(n))) { |
| 106 | int i; |
| 107 | PyObject *v, *w; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 108 | v = mkseq(1 + NCH(n)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 109 | if (v == NULL) |
| 110 | return v; |
| 111 | w = PyInt_FromLong(TYPE(n)); |
| 112 | if (w == NULL) { |
| 113 | Py_DECREF(v); |
| 114 | return NULL; |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 115 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 116 | addelem(v, 0, w); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 117 | for (i = 0; i < NCH(n); i++) { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 118 | w = node2tuple(CHILD(n, i), mkseq, addelem, lineno); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 119 | if (w == NULL) { |
| 120 | Py_DECREF(v); |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 121 | return NULL; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 122 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 123 | addelem(v, i+1, w); |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 124 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 125 | return (v); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 126 | } |
| 127 | else if (ISTERMINAL(TYPE(n))) { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 128 | PyObject *result = mkseq(2 + lineno); |
| 129 | if (result != NULL) { |
| 130 | addelem(result, 0, PyInt_FromLong(TYPE(n))); |
| 131 | addelem(result, 1, PyString_FromString(STR(n))); |
| 132 | if (lineno == 1) |
| 133 | addelem(result, 2, PyInt_FromLong(n->n_lineno)); |
| 134 | } |
| 135 | return (result); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 136 | } |
| 137 | else { |
| 138 | PyErr_SetString(PyExc_SystemError, |
| 139 | "unrecognized parse tree node type"); |
| 140 | return NULL; |
| 141 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 142 | } /* node2tuple() */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 143 | /* |
| 144 | * End of material copyrighted by Stichting Mathematisch Centrum. |
| 145 | */ |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 146 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 147 | |
| 148 | |
| 149 | /* There are two types of intermediate objects we're interested in: |
| 150 | * 'eval' and 'exec' types. These constants can be used in the ast_type |
| 151 | * field of the object type to identify which any given object represents. |
| 152 | * These should probably go in an external header to allow other extensions |
| 153 | * to use them, but then, we really should be using C++ too. ;-) |
| 154 | * |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 155 | * The PyAST_FRAGMENT type is not currently supported. Maybe not useful? |
| 156 | * Haven't decided yet. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 157 | */ |
| 158 | |
| 159 | #define PyAST_EXPR 1 |
| 160 | #define PyAST_SUITE 2 |
| 161 | #define PyAST_FRAGMENT 3 |
| 162 | |
| 163 | |
| 164 | /* These are the internal objects and definitions required to implement the |
| 165 | * AST type. Most of the internal names are more reminiscent of the 'old' |
| 166 | * naming style, but the code uses the new naming convention. |
| 167 | */ |
| 168 | |
| 169 | static PyObject* |
| 170 | parser_error = 0; |
| 171 | |
| 172 | |
| 173 | typedef struct _PyAST_Object { |
| 174 | |
| 175 | PyObject_HEAD /* standard object header */ |
| 176 | node* ast_node; /* the node* returned by the parser */ |
| 177 | int ast_type; /* EXPR or SUITE ? */ |
| 178 | |
| 179 | } PyAST_Object; |
| 180 | |
| 181 | |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 182 | staticforward void parser_free Py_PROTO((PyAST_Object *ast)); |
| 183 | staticforward int parser_compare Py_PROTO((PyAST_Object *left, |
| 184 | PyAST_Object *right)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 185 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 186 | staticforward PyObject *parser_getattr Py_PROTO((PyObject *self, char *name)); |
| 187 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 188 | |
| 189 | /* static */ |
| 190 | PyTypeObject PyAST_Type = { |
| 191 | |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 192 | PyObject_HEAD_INIT(NULL) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 193 | 0, |
| 194 | "ast", /* tp_name */ |
| 195 | sizeof(PyAST_Object), /* tp_basicsize */ |
| 196 | 0, /* tp_itemsize */ |
| 197 | (destructor)parser_free, /* tp_dealloc */ |
| 198 | 0, /* tp_print */ |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 199 | parser_getattr, /* tp_getattr */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 200 | 0, /* tp_setattr */ |
| 201 | (cmpfunc)parser_compare, /* tp_compare */ |
| 202 | 0, /* tp_repr */ |
| 203 | 0, /* tp_as_number */ |
| 204 | 0, /* tp_as_sequence */ |
| 205 | 0, /* tp_as_mapping */ |
| 206 | 0, /* tp_hash */ |
| 207 | 0, /* tp_call */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 208 | 0, /* tp_str */ |
| 209 | 0, /* tp_getattro */ |
| 210 | 0, /* tp_setattro */ |
| 211 | |
| 212 | /* Functions to access object as input/output buffer */ |
| 213 | 0, /* tp_as_buffer */ |
| 214 | |
| 215 | /* Space for future expansion */ |
| 216 | 0, /* tp_xxx4 */ |
| 217 | |
| 218 | /* __doc__ */ |
| 219 | "Intermediate representation of a Python parse tree." |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 220 | |
| 221 | }; /* PyAST_Type */ |
| 222 | |
| 223 | |
| 224 | static int |
| 225 | parser_compare_nodes(left, right) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 226 | node *left; |
| 227 | node *right; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 228 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 229 | int j; |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 230 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 231 | if (TYPE(left) < TYPE(right)) |
| 232 | return (-1); |
| 233 | |
| 234 | if (TYPE(right) < TYPE(left)) |
| 235 | return (1); |
| 236 | |
| 237 | if (ISTERMINAL(TYPE(left))) |
| 238 | return (strcmp(STR(left), STR(right))); |
| 239 | |
| 240 | if (NCH(left) < NCH(right)) |
| 241 | return (-1); |
| 242 | |
| 243 | if (NCH(right) < NCH(left)) |
| 244 | return (1); |
| 245 | |
| 246 | for (j = 0; j < NCH(left); ++j) { |
| 247 | int v = parser_compare_nodes(CHILD(left, j), CHILD(right, j)); |
| 248 | |
| 249 | if (v) |
| 250 | return (v); |
| 251 | } |
| 252 | return (0); |
| 253 | |
| 254 | } /* parser_compare_nodes() */ |
| 255 | |
| 256 | |
| 257 | /* int parser_compare(PyAST_Object* left, PyAST_Object* right) |
| 258 | * |
| 259 | * Comparison function used by the Python operators ==, !=, <, >, <=, >= |
| 260 | * This really just wraps a call to parser_compare_nodes() with some easy |
| 261 | * checks and protection code. |
| 262 | * |
| 263 | */ |
| 264 | static int |
| 265 | parser_compare(left, right) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 266 | PyAST_Object *left; |
| 267 | PyAST_Object *right; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 268 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 269 | if (left == right) |
| 270 | return (0); |
| 271 | |
| 272 | if ((left == 0) || (right == 0)) |
| 273 | return (-1); |
| 274 | |
| 275 | return (parser_compare_nodes(left->ast_node, right->ast_node)); |
| 276 | |
| 277 | } /* parser_compare() */ |
| 278 | |
| 279 | |
| 280 | /* parser_newastobject(node* ast) |
| 281 | * |
| 282 | * Allocates a new Python object representing an AST. This is simply the |
| 283 | * 'wrapper' object that holds a node* and allows it to be passed around in |
| 284 | * Python code. |
| 285 | * |
| 286 | */ |
| 287 | static PyObject* |
| 288 | parser_newastobject(ast, type) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 289 | node *ast; |
| 290 | int type; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 291 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 292 | PyAST_Object* o = PyObject_NEW(PyAST_Object, &PyAST_Type); |
| 293 | |
| 294 | if (o != 0) { |
| 295 | o->ast_node = ast; |
| 296 | o->ast_type = type; |
| 297 | } |
| 298 | return ((PyObject*)o); |
| 299 | |
| 300 | } /* parser_newastobject() */ |
| 301 | |
| 302 | |
| 303 | /* void parser_free(PyAST_Object* ast) |
| 304 | * |
| 305 | * This is called by a del statement that reduces the reference count to 0. |
| 306 | * |
| 307 | */ |
| 308 | static void |
| 309 | parser_free(ast) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 310 | PyAST_Object *ast; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 311 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 312 | PyNode_Free(ast->ast_node); |
| 313 | PyMem_DEL(ast); |
| 314 | |
| 315 | } /* parser_free() */ |
| 316 | |
| 317 | |
| 318 | /* parser_ast2tuple(PyObject* self, PyObject* args) |
| 319 | * |
| 320 | * This provides conversion from a node* to a tuple object that can be |
| 321 | * returned to the Python-level caller. The AST object is not modified. |
| 322 | * |
| 323 | */ |
| 324 | static PyObject* |
| 325 | parser_ast2tuple(self, args) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 326 | PyAST_Object *self; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 327 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 328 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 329 | PyObject *line_option = 0; |
| 330 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 331 | int ok; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 332 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 333 | if (self == NULL) |
| 334 | ok = PyArg_ParseTuple( |
| 335 | args, "O!|O:ast2tuple", &PyAST_Type, &self, &line_option); |
| 336 | else |
| 337 | ok = PyArg_ParseTuple(args, "|O:totuple", &line_option); |
| 338 | if (ok) { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 339 | int lineno = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 340 | if (line_option != NULL) { |
| 341 | lineno = PyObject_IsTrue(line_option) ? 1 : 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 342 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 343 | /* |
| 344 | * Convert AST into a tuple representation. Use Guido's function, |
| 345 | * since it's known to work already. |
| 346 | */ |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 347 | res = node2tuple(((PyAST_Object*)self)->ast_node, |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 348 | PyTuple_New, PyTuple_SetItem, lineno); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 349 | } |
| 350 | return (res); |
| 351 | |
| 352 | } /* parser_ast2tuple() */ |
| 353 | |
| 354 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 355 | /* parser_ast2tuple(PyObject* self, PyObject* args) |
| 356 | * |
| 357 | * This provides conversion from a node* to a tuple object that can be |
| 358 | * returned to the Python-level caller. The AST object is not modified. |
| 359 | * |
| 360 | */ |
| 361 | static PyObject* |
| 362 | parser_ast2list(self, args) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 363 | PyAST_Object *self; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 364 | PyObject *args; |
| 365 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 366 | PyObject *line_option = 0; |
| 367 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 368 | int ok; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 369 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 370 | if (self == NULL) |
| 371 | ok = PyArg_ParseTuple( |
| 372 | args, "O!|O:ast2list", &PyAST_Type, &self, &line_option); |
| 373 | else |
| 374 | ok = PyArg_ParseTuple(args, "|O:tolist", &line_option); |
| 375 | if (ok) { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 376 | int lineno = 0; |
| 377 | if (line_option != 0) { |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 378 | lineno = PyObject_IsTrue(line_option) ? 1 : 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 379 | } |
| 380 | /* |
| 381 | * Convert AST into a tuple representation. Use Guido's function, |
| 382 | * since it's known to work already. |
| 383 | */ |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 384 | res = node2tuple(((PyAST_Object *)self)->ast_node, |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 385 | PyList_New, PyList_SetItem, lineno); |
| 386 | } |
| 387 | return (res); |
| 388 | |
| 389 | } /* parser_ast2list() */ |
| 390 | |
| 391 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 392 | /* parser_compileast(PyObject* self, PyObject* args) |
| 393 | * |
| 394 | * This function creates code objects from the parse tree represented by |
| 395 | * the passed-in data object. An optional file name is passed in as well. |
| 396 | * |
| 397 | */ |
| 398 | static PyObject* |
| 399 | parser_compileast(self, args) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 400 | PyAST_Object *self; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 401 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 402 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 403 | PyObject* res = 0; |
| 404 | char* str = "<ast>"; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 405 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 406 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 407 | if (self == NULL) |
| 408 | ok = PyArg_ParseTuple( |
| 409 | args, "O!|s:compileast", &PyAST_Type, &self, &str); |
| 410 | else |
| 411 | ok = PyArg_ParseTuple(args, "|s:compile", &str); |
| 412 | |
| 413 | if (ok) |
| 414 | res = (PyObject *)PyNode_Compile(self->ast_node, str); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 415 | |
| 416 | return (res); |
| 417 | |
| 418 | } /* parser_compileast() */ |
| 419 | |
| 420 | |
| 421 | /* PyObject* parser_isexpr(PyObject* self, PyObject* args) |
| 422 | * PyObject* parser_issuite(PyObject* self, PyObject* args) |
| 423 | * |
| 424 | * Checks the passed-in AST object to determine if it is an expression or |
| 425 | * a statement suite, respectively. The return is a Python truth value. |
| 426 | * |
| 427 | */ |
| 428 | static PyObject* |
| 429 | parser_isexpr(self, args) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 430 | PyAST_Object *self; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 431 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 432 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 433 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 434 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 435 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 436 | if (self == NULL) |
| 437 | ok = PyArg_ParseTuple(args, "O!:isexpr", &PyAST_Type, &self); |
| 438 | else |
| 439 | ok = PyArg_ParseTuple(args, ":isexpr"); |
| 440 | |
| 441 | if (ok) { |
| 442 | /* Check to see if the AST represents an expression or not. */ |
| 443 | res = (self->ast_type == PyAST_EXPR) ? Py_True : Py_False; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 444 | Py_INCREF(res); |
| 445 | } |
| 446 | return (res); |
| 447 | |
| 448 | } /* parser_isexpr() */ |
| 449 | |
| 450 | |
| 451 | static PyObject* |
| 452 | parser_issuite(self, args) |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 453 | PyAST_Object *self; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 454 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 455 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 456 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 457 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 458 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 459 | if (self == NULL) |
| 460 | ok = PyArg_ParseTuple(args, "O!:issuite", &PyAST_Type, &self); |
| 461 | else |
| 462 | ok = PyArg_ParseTuple(args, ":issuite"); |
| 463 | |
| 464 | if (ok) { |
| 465 | /* Check to see if the AST represents an expression or not. */ |
| 466 | res = (self->ast_type == PyAST_EXPR) ? Py_False : Py_True; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 467 | Py_INCREF(res); |
| 468 | } |
| 469 | return (res); |
| 470 | |
| 471 | } /* parser_issuite() */ |
| 472 | |
| 473 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 474 | static PyMethodDef |
| 475 | parser_methods[] = { |
| 476 | {"compile", parser_compileast, METH_VARARGS}, |
| 477 | {"isexpr", parser_isexpr, METH_VARARGS}, |
| 478 | {"issuite", parser_issuite, METH_VARARGS}, |
| 479 | {"tolist", parser_ast2list, METH_VARARGS}, |
| 480 | {"totuple", parser_ast2tuple, METH_VARARGS}, |
| 481 | |
| 482 | {NULL} |
| 483 | }; |
| 484 | |
| 485 | static PyObject* |
| 486 | parser_method_list = NULL; |
| 487 | |
| 488 | |
| 489 | static PyObject* |
| 490 | parser_getattr(self, name) |
| 491 | PyObject *self; |
| 492 | char *name; |
| 493 | { |
| 494 | if (strcmp(name, "__methods__") == 0) { |
| 495 | Py_INCREF(parser_method_list); |
| 496 | return (parser_method_list); |
| 497 | } |
| 498 | return (Py_FindMethod(parser_methods, self, name)); |
| 499 | |
| 500 | } /* parser_getattr() */ |
| 501 | |
| 502 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 503 | /* err_string(char* message) |
| 504 | * |
| 505 | * Sets the error string for an exception of type ParserError. |
| 506 | * |
| 507 | */ |
| 508 | static void |
| 509 | err_string(message) |
| 510 | char *message; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 511 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 512 | PyErr_SetString(parser_error, message); |
| 513 | |
| 514 | } /* err_string() */ |
| 515 | |
| 516 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 517 | /* PyObject* parser_do_parse(PyObject* args, int type) |
| 518 | * |
| 519 | * Internal function to actually execute the parse and return the result if |
| 520 | * successful, or set an exception if not. |
| 521 | * |
| 522 | */ |
| 523 | static PyObject* |
| 524 | parser_do_parse(args, type) |
| 525 | PyObject *args; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 526 | int type; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 527 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 528 | char* string = 0; |
| 529 | PyObject* res = 0; |
| 530 | |
| 531 | if (PyArg_ParseTuple(args, "s", &string)) { |
| 532 | node* n = PyParser_SimpleParseString(string, |
| 533 | (type == PyAST_EXPR) |
| 534 | ? eval_input : file_input); |
| 535 | |
| 536 | if (n != 0) |
| 537 | res = parser_newastobject(n, type); |
| 538 | else |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 539 | err_string("Could not parse string."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 540 | } |
| 541 | return (res); |
| 542 | |
| 543 | } /* parser_do_parse() */ |
| 544 | |
| 545 | |
| 546 | /* PyObject* parser_expr(PyObject* self, PyObject* args) |
| 547 | * PyObject* parser_suite(PyObject* self, PyObject* args) |
| 548 | * |
| 549 | * External interfaces to the parser itself. Which is called determines if |
| 550 | * the parser attempts to recognize an expression ('eval' form) or statement |
| 551 | * suite ('exec' form). The real work is done by parser_do_parse() above. |
| 552 | * |
| 553 | */ |
| 554 | static PyObject* |
| 555 | parser_expr(self, args) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 556 | PyObject *self; |
| 557 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 558 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 559 | return (parser_do_parse(args, PyAST_EXPR)); |
| 560 | |
| 561 | } /* parser_expr() */ |
| 562 | |
| 563 | |
| 564 | static PyObject* |
| 565 | parser_suite(self, args) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 566 | PyObject *self; |
| 567 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 568 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 569 | return (parser_do_parse(args, PyAST_SUITE)); |
| 570 | |
| 571 | } /* parser_suite() */ |
| 572 | |
| 573 | |
| 574 | |
| 575 | /* This is the messy part of the code. Conversion from a tuple to an AST |
| 576 | * object requires that the input tuple be valid without having to rely on |
| 577 | * catching an exception from the compiler. This is done to allow the |
| 578 | * compiler itself to remain fast, since most of its input will come from |
| 579 | * the parser directly, and therefore be known to be syntactically correct. |
| 580 | * This validation is done to ensure that we don't core dump the compile |
| 581 | * phase, returning an exception instead. |
| 582 | * |
| 583 | * Two aspects can be broken out in this code: creating a node tree from |
| 584 | * the tuple passed in, and verifying that it is indeed valid. It may be |
| 585 | * advantageous to expand the number of AST types to include funcdefs and |
| 586 | * lambdadefs to take advantage of the optimizer, recognizing those ASTs |
| 587 | * here. They are not necessary, and not quite as useful in a raw form. |
| 588 | * For now, let's get expressions and suites working reliably. |
| 589 | */ |
| 590 | |
| 591 | |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 592 | staticforward node* build_node_tree Py_PROTO((PyObject *tuple)); |
| 593 | staticforward int validate_expr_tree Py_PROTO((node *tree)); |
| 594 | staticforward int validate_file_input Py_PROTO((node *tree)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 595 | |
| 596 | |
| 597 | /* PyObject* parser_tuple2ast(PyObject* self, PyObject* args) |
| 598 | * |
| 599 | * This is the public function, called from the Python code. It receives a |
| 600 | * single tuple object from the caller, and creates an AST object if the |
| 601 | * tuple can be validated. It does this by checking the first code of the |
| 602 | * tuple, and, if acceptable, builds the internal representation. If this |
| 603 | * step succeeds, the internal representation is validated as fully as |
| 604 | * possible with the various validate_*() routines defined below. |
| 605 | * |
| 606 | * This function must be changed if support is to be added for PyAST_FRAGMENT |
| 607 | * AST objects. |
| 608 | * |
| 609 | */ |
| 610 | static PyObject* |
| 611 | parser_tuple2ast(self, args) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 612 | PyObject *self; |
| 613 | PyObject *args; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 614 | { |
| 615 | PyObject *ast = 0; |
| 616 | PyObject *tuple = 0; |
| 617 | PyObject *temp = 0; |
| 618 | int ok; |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 619 | int start_sym = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 620 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 621 | if (!PyArg_ParseTuple(args, "O:tuple2ast", &tuple)) |
| 622 | return (0); |
| 623 | if (!PySequence_Check(tuple)) { |
| 624 | PyErr_SetString(PyExc_ValueError, |
| 625 | "tuple2ast() requires a single sequence argument"); |
| 626 | return (0); |
| 627 | } |
| 628 | /* |
| 629 | * This mess of tests is written this way so we can use the abstract |
| 630 | * object interface (AOI). Unfortunately, the AOI increments reference |
| 631 | * counts, which requires that we store a pointer to retrieved object |
| 632 | * so we can DECREF it after the check. But we really should accept |
| 633 | * lists as well as tuples at the very least. |
| 634 | */ |
| 635 | ok = PyObject_Length(tuple) >= 2; |
| 636 | if (ok) { |
| 637 | temp = PySequence_GetItem(tuple, 0); |
| 638 | ok = (temp != NULL) && PyInt_Check(temp); |
| 639 | if (ok) |
| 640 | /* this is used after the initial checks: */ |
| 641 | start_sym = PyInt_AsLong(temp); |
| 642 | Py_XDECREF(temp); |
| 643 | } |
| 644 | if (ok) { |
| 645 | temp = PySequence_GetItem(tuple, 1); |
| 646 | ok = (temp != NULL) && PySequence_Check(temp); |
| 647 | Py_XDECREF(temp); |
| 648 | } |
| 649 | if (ok) { |
| 650 | temp = PySequence_GetItem(tuple, 1); |
| 651 | ok = (temp != NULL) && PyObject_Length(temp) >= 2; |
| 652 | if (ok) { |
| 653 | PyObject *temp2 = PySequence_GetItem(temp, 0); |
| 654 | if (temp2 != NULL) { |
| 655 | ok = PyInt_Check(temp2); |
| 656 | Py_DECREF(temp2); |
| 657 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 658 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 659 | Py_XDECREF(temp); |
| 660 | } |
| 661 | /* If we've failed at some point, get out of here. */ |
| 662 | if (!ok) { |
| 663 | err_string("malformed sequence for tuple2ast()"); |
| 664 | return (0); |
| 665 | } |
| 666 | /* |
| 667 | * This might be a valid parse tree, but let's do a quick check |
| 668 | * before we jump the gun. |
| 669 | */ |
| 670 | if (start_sym == eval_input) { |
| 671 | /* Might be an eval form. */ |
| 672 | node* expression = build_node_tree(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 673 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 674 | if ((expression != 0) && validate_expr_tree(expression)) |
| 675 | ast = parser_newastobject(expression, PyAST_EXPR); |
| 676 | } |
| 677 | else if (start_sym == file_input) { |
| 678 | /* This looks like an exec form so far. */ |
| 679 | node* suite_tree = build_node_tree(tuple); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 680 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 681 | if ((suite_tree != 0) && validate_file_input(suite_tree)) |
| 682 | ast = parser_newastobject(suite_tree, PyAST_SUITE); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 683 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 684 | else |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 685 | /* This is a fragment, and is not yet supported. Maybe they |
| 686 | * will be if I find a use for them. |
| 687 | */ |
| 688 | err_string("Fragmentary parse trees not supported."); |
| 689 | |
| 690 | /* Make sure we throw an exception on all errors. We should never |
| 691 | * get this, but we'd do well to be sure something is done. |
| 692 | */ |
| 693 | if ((ast == 0) && !PyErr_Occurred()) |
| 694 | err_string("Unspecified ast error occurred."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 695 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 696 | return (ast); |
| 697 | |
| 698 | } /* parser_tuple2ast() */ |
| 699 | |
| 700 | |
| 701 | /* int check_terminal_tuple() |
| 702 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 703 | * Check a tuple to determine that it is indeed a valid terminal |
| 704 | * node. The node is known to be required as a terminal, so we throw |
| 705 | * an exception if there is a failure. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 706 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 707 | * The format of an acceptable terminal tuple is "(is[i])": the fact |
| 708 | * that elem is a tuple and the integer is a valid terminal symbol |
| 709 | * has been established before this function is called. We must |
| 710 | * check the length of the tuple and the type of the second element |
| 711 | * and optional third element. We do *NOT* check the actual text of |
| 712 | * the string element, which we could do in many cases. This is done |
| 713 | * by the validate_*() functions which operate on the internal |
| 714 | * representation. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 715 | */ |
| 716 | static int |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 717 | check_terminal_tuple(elem) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 718 | PyObject *elem; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 719 | { |
| 720 | int len = PyObject_Length(elem); |
| 721 | int res = 1; |
| 722 | char* str = "Illegal terminal symbol; bad node length."; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 723 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 724 | if ((len == 2) || (len == 3)) { |
| 725 | PyObject *temp = PySequence_GetItem(elem, 1); |
| 726 | res = PyString_Check(temp); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 727 | str = "Illegal terminal symbol; expected a string."; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 728 | if (res && (len == 3)) { |
| 729 | PyObject* third = PySequence_GetItem(elem, 2); |
| 730 | res = PyInt_Check(third); |
| 731 | str = "Invalid third element of terminal node."; |
| 732 | Py_XDECREF(third); |
| 733 | } |
| 734 | Py_XDECREF(temp); |
| 735 | } |
| 736 | else { |
| 737 | res = 0; |
| 738 | } |
| 739 | if (!res) { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 740 | elem = Py_BuildValue("(os)", elem, str); |
| 741 | PyErr_SetObject(parser_error, elem); |
| 742 | } |
| 743 | return (res); |
| 744 | |
| 745 | } /* check_terminal_tuple() */ |
| 746 | |
| 747 | |
| 748 | /* node* build_node_children() |
| 749 | * |
| 750 | * Iterate across the children of the current non-terminal node and build |
| 751 | * their structures. If successful, return the root of this portion of |
| 752 | * the tree, otherwise, 0. Any required exception will be specified already, |
| 753 | * and no memory will have been deallocated. |
| 754 | * |
| 755 | */ |
| 756 | static node* |
| 757 | build_node_children(tuple, root, line_num) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 758 | PyObject *tuple; |
| 759 | node *root; |
| 760 | int *line_num; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 761 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 762 | int len = PyObject_Length(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 763 | int i; |
| 764 | |
| 765 | for (i = 1; i < len; ++i) { |
| 766 | /* elem must always be a tuple, however simple */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 767 | PyObject* elem = PySequence_GetItem(tuple, i); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 768 | int ok = elem != NULL; |
| 769 | long type = 0; |
| 770 | char *strn = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 771 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 772 | if (ok) |
| 773 | ok = PySequence_Check(elem); |
| 774 | if (ok) { |
| 775 | PyObject *temp = PySequence_GetItem(elem, 0); |
| 776 | if (temp == NULL) |
| 777 | ok = 0; |
| 778 | else { |
| 779 | ok = PyInt_Check(temp); |
| 780 | if (ok) |
| 781 | type = PyInt_AsLong(temp); |
| 782 | Py_DECREF(temp); |
| 783 | } |
| 784 | } |
| 785 | if (!ok) { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 786 | PyErr_SetObject(parser_error, |
| 787 | Py_BuildValue("(os)", elem, |
| 788 | "Illegal node construct.")); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 789 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 790 | return (0); |
| 791 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 792 | if (ISTERMINAL(type)) { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 793 | if (check_terminal_tuple(elem)) { |
| 794 | PyObject *temp = PySequence_GetItem(elem, 1); |
| 795 | |
Fred Drake | d49266e | 1997-10-09 16:29:31 +0000 | [diff] [blame] | 796 | /* check_terminal_tuple() already verified it's a string */ |
| 797 | strn = (char *)malloc(PyString_GET_SIZE(temp) + 1); |
| 798 | if (strn != NULL) |
| 799 | strcpy(strn, PyString_AS_STRING(temp)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 800 | Py_XDECREF(temp); |
| 801 | |
| 802 | if (PyObject_Length(elem) == 3) { |
| 803 | PyObject* temp = PySequence_GetItem(elem, 2); |
| 804 | *line_num = PyInt_AsLong(temp); |
| 805 | Py_DECREF(temp); |
| 806 | } |
| 807 | } |
| 808 | else { |
| 809 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 810 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 811 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 812 | } |
| 813 | else if (!ISNONTERMINAL(type)) { |
| 814 | /* |
| 815 | * It has to be one or the other; this is an error. |
| 816 | * Throw an exception. |
| 817 | */ |
| 818 | PyErr_SetObject(parser_error, |
| 819 | Py_BuildValue("(os)", elem, |
| 820 | "Unknown node type.")); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 821 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 822 | return (0); |
| 823 | } |
| 824 | PyNode_AddChild(root, type, strn, *line_num); |
| 825 | |
| 826 | if (ISNONTERMINAL(type)) { |
| 827 | node* new_child = CHILD(root, i - 1); |
| 828 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 829 | if (new_child != build_node_children(elem, new_child, line_num)) { |
| 830 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 831 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 832 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 833 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 834 | else if (type == NEWLINE) { /* It's true: we increment the */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 835 | ++(*line_num); /* line number *after* the newline! */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 836 | } |
| 837 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 838 | } |
| 839 | return (root); |
| 840 | |
| 841 | } /* build_node_children() */ |
| 842 | |
| 843 | |
| 844 | static node* |
| 845 | build_node_tree(tuple) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 846 | PyObject *tuple; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 847 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 848 | node* res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 849 | PyObject *temp = PySequence_GetItem(tuple, 0); |
| 850 | long num = -1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 851 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 852 | if (temp != NULL) |
| 853 | num = PyInt_AsLong(temp); |
| 854 | Py_XDECREF(temp); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 855 | if (ISTERMINAL(num)) { |
| 856 | /* |
| 857 | * The tuple is simple, but it doesn't start with a start symbol. |
| 858 | * Throw an exception now and be done with it. |
| 859 | */ |
| 860 | tuple = Py_BuildValue("(os)", tuple, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 861 | "Illegal ast tuple; cannot start with terminal symbol."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 862 | PyErr_SetObject(parser_error, tuple); |
| 863 | } |
| 864 | else if (ISNONTERMINAL(num)) { |
| 865 | /* |
| 866 | * Not efficient, but that can be handled later. |
| 867 | */ |
| 868 | int line_num = 0; |
| 869 | |
| 870 | res = PyNode_New(num); |
| 871 | if (res != build_node_children(tuple, res, &line_num)) { |
| 872 | PyNode_Free(res); |
| 873 | res = 0; |
| 874 | } |
| 875 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 876 | else |
| 877 | /* The tuple is illegal -- if the number is neither TERMINAL nor |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 878 | * NONTERMINAL, we can't use it. |
| 879 | */ |
| 880 | PyErr_SetObject(parser_error, |
| 881 | Py_BuildValue("(os)", tuple, |
| 882 | "Illegal component tuple.")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 883 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 884 | return (res); |
| 885 | |
| 886 | } /* build_node_tree() */ |
| 887 | |
| 888 | |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 889 | #ifdef HAVE_OLD_CPP |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 890 | #define VALIDATER(n) static int validate_/**/n Py_PROTO((node *tree)) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 891 | #else |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 892 | #define VALIDATER(n) static int validate_##n Py_PROTO((node *tree)) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 893 | #endif |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 894 | |
| 895 | |
| 896 | /* |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 897 | * Validation routines used within the validation section: |
| 898 | */ |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 899 | staticforward int validate_terminal Py_PROTO((node *terminal, |
| 900 | int type, char *string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 901 | |
| 902 | #define validate_ampersand(ch) validate_terminal(ch, AMPER, "&") |
| 903 | #define validate_circumflex(ch) validate_terminal(ch, CIRCUMFLEX, "^") |
| 904 | #define validate_colon(ch) validate_terminal(ch, COLON, ":") |
| 905 | #define validate_comma(ch) validate_terminal(ch, COMMA, ",") |
| 906 | #define validate_dedent(ch) validate_terminal(ch, DEDENT, "") |
| 907 | #define validate_equal(ch) validate_terminal(ch, EQUAL, "=") |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 908 | #define validate_indent(ch) validate_terminal(ch, INDENT, 0) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 909 | #define validate_lparen(ch) validate_terminal(ch, LPAR, "(") |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 910 | #define validate_newline(ch) validate_terminal(ch, NEWLINE, 0) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 911 | #define validate_rparen(ch) validate_terminal(ch, RPAR, ")") |
| 912 | #define validate_semi(ch) validate_terminal(ch, SEMI, ";") |
| 913 | #define validate_star(ch) validate_terminal(ch, STAR, "*") |
| 914 | #define validate_vbar(ch) validate_terminal(ch, VBAR, "|") |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 915 | #define validate_doublestar(ch) validate_terminal(ch, DOUBLESTAR, "**") |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 916 | #define validate_dot(ch) validate_terminal(ch, DOT, ".") |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 917 | #define validate_name(ch, str) validate_terminal(ch, NAME, str) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 918 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 919 | VALIDATER(node); VALIDATER(small_stmt); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 920 | VALIDATER(class); VALIDATER(node); |
| 921 | VALIDATER(parameters); VALIDATER(suite); |
| 922 | VALIDATER(testlist); VALIDATER(varargslist); |
| 923 | VALIDATER(fpdef); VALIDATER(fplist); |
| 924 | VALIDATER(stmt); VALIDATER(simple_stmt); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 925 | VALIDATER(expr_stmt); VALIDATER(power); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 926 | VALIDATER(print_stmt); VALIDATER(del_stmt); |
| 927 | VALIDATER(return_stmt); |
| 928 | VALIDATER(raise_stmt); VALIDATER(import_stmt); |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 929 | VALIDATER(global_stmt); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 930 | VALIDATER(assert_stmt); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 931 | VALIDATER(exec_stmt); VALIDATER(compound_stmt); |
| 932 | VALIDATER(while); VALIDATER(for); |
| 933 | VALIDATER(try); VALIDATER(except_clause); |
| 934 | VALIDATER(test); VALIDATER(and_test); |
| 935 | VALIDATER(not_test); VALIDATER(comparison); |
| 936 | VALIDATER(comp_op); VALIDATER(expr); |
| 937 | VALIDATER(xor_expr); VALIDATER(and_expr); |
| 938 | VALIDATER(shift_expr); VALIDATER(arith_expr); |
| 939 | VALIDATER(term); VALIDATER(factor); |
| 940 | VALIDATER(atom); VALIDATER(lambdef); |
| 941 | VALIDATER(trailer); VALIDATER(subscript); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 942 | VALIDATER(subscriptlist); VALIDATER(sliceop); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 943 | VALIDATER(exprlist); VALIDATER(dictmaker); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 944 | VALIDATER(arglist); VALIDATER(argument); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 945 | |
| 946 | |
| 947 | #define is_even(n) (((n) & 1) == 0) |
| 948 | #define is_odd(n) (((n) & 1) == 1) |
| 949 | |
| 950 | |
| 951 | static int |
| 952 | validate_ntype(n, t) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 953 | node *n; |
| 954 | int t; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 955 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 956 | int res = (TYPE(n) == t); |
| 957 | |
| 958 | if (!res) { |
| 959 | char buffer[128]; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 960 | sprintf(buffer, "Expected node type %d, got %d.", t, TYPE(n)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 961 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 962 | } |
| 963 | return (res); |
| 964 | |
| 965 | } /* validate_ntype() */ |
| 966 | |
| 967 | |
| 968 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 969 | validate_numnodes(n, num, name) |
| 970 | node *n; |
| 971 | int num; |
| 972 | const char *const name; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 973 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 974 | if (NCH(n) != num) { |
| 975 | char buff[60]; |
| 976 | sprintf(buff, "Illegal number of children for %s node.", name); |
| 977 | err_string(buff); |
| 978 | } |
| 979 | return (NCH(n) == num); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 980 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 981 | } /* validate_numnodes() */ |
| 982 | |
| 983 | |
| 984 | static int |
| 985 | validate_terminal(terminal, type, string) |
| 986 | node *terminal; |
| 987 | int type; |
| 988 | char *string; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 989 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 990 | int res = (validate_ntype(terminal, type) |
| 991 | && ((string == 0) || (strcmp(string, STR(terminal)) == 0))); |
| 992 | |
| 993 | if (!res && !PyErr_Occurred()) { |
| 994 | char buffer[60]; |
| 995 | sprintf(buffer, "Illegal terminal: expected \"%s\"", string); |
| 996 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 997 | } |
| 998 | return (res); |
| 999 | |
| 1000 | } /* validate_terminal() */ |
| 1001 | |
| 1002 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1003 | /* X (',' X) [','] |
| 1004 | */ |
| 1005 | static int |
| 1006 | validate_repeating_list(tree, ntype, vfunc, name) |
| 1007 | node *tree; |
| 1008 | int ntype; |
| 1009 | int (*vfunc)(); |
| 1010 | const char *const name; |
| 1011 | { |
| 1012 | int nch = NCH(tree); |
| 1013 | int res = (nch && validate_ntype(tree, ntype) |
| 1014 | && vfunc(CHILD(tree, 0))); |
| 1015 | |
| 1016 | if (!res && !PyErr_Occurred()) |
| 1017 | validate_numnodes(tree, 1, name); |
| 1018 | else { |
| 1019 | if (is_even(nch)) |
| 1020 | res = validate_comma(CHILD(tree, --nch)); |
| 1021 | if (res && nch > 1) { |
| 1022 | int pos = 1; |
| 1023 | for ( ; res && pos < nch; pos += 2) |
| 1024 | res = (validate_comma(CHILD(tree, pos)) |
| 1025 | && vfunc(CHILD(tree, pos + 1))); |
| 1026 | } |
| 1027 | } |
| 1028 | return (res); |
| 1029 | |
| 1030 | } /* validate_repeating_list() */ |
| 1031 | |
| 1032 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1033 | /* VALIDATE(class) |
| 1034 | * |
| 1035 | * classdef: |
| 1036 | * 'class' NAME ['(' testlist ')'] ':' suite |
| 1037 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1038 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1039 | validate_class(tree) |
| 1040 | node *tree; |
| 1041 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1042 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1043 | int res = validate_ntype(tree, classdef) && ((nch == 4) || (nch == 7)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1044 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1045 | if (res) { |
| 1046 | res = (validate_name(CHILD(tree, 0), "class") |
| 1047 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1048 | && validate_colon(CHILD(tree, nch - 2)) |
| 1049 | && validate_suite(CHILD(tree, nch - 1))); |
| 1050 | } |
| 1051 | else |
| 1052 | validate_numnodes(tree, 4, "class"); |
| 1053 | if (res && (nch == 7)) { |
| 1054 | res = (validate_lparen(CHILD(tree, 2)) |
| 1055 | && validate_testlist(CHILD(tree, 3)) |
| 1056 | && validate_rparen(CHILD(tree, 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1057 | } |
| 1058 | return (res); |
| 1059 | |
| 1060 | } /* validate_class() */ |
| 1061 | |
| 1062 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1063 | /* if_stmt: |
| 1064 | * 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
| 1065 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1066 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1067 | validate_if(tree) |
| 1068 | node *tree; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1069 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1070 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1071 | int res = (validate_ntype(tree, if_stmt) |
| 1072 | && (nch >= 4) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1073 | && validate_name(CHILD(tree, 0), "if") |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1074 | && validate_test(CHILD(tree, 1)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1075 | && validate_colon(CHILD(tree, 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1076 | && validate_suite(CHILD(tree, 3))); |
| 1077 | |
| 1078 | if (res && ((nch % 4) == 3)) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1079 | /* ... 'else' ':' suite */ |
| 1080 | res = (validate_name(CHILD(tree, nch - 3), "else") |
| 1081 | && validate_colon(CHILD(tree, nch - 2)) |
| 1082 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1083 | nch -= 3; |
| 1084 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1085 | else if (!res && !PyErr_Occurred()) |
| 1086 | validate_numnodes(tree, 4, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1087 | if ((nch % 4) != 0) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1088 | /* Will catch the case for nch < 4 */ |
| 1089 | res = validate_numnodes(tree, 0, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1090 | else if (res && (nch > 4)) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1091 | /* ... ('elif' test ':' suite)+ ... */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1092 | int j = 4; |
| 1093 | while ((j < nch) && res) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1094 | res = (validate_name(CHILD(tree, j), "elif") |
| 1095 | && validate_colon(CHILD(tree, j + 2)) |
| 1096 | && validate_test(CHILD(tree, j + 1)) |
| 1097 | && validate_suite(CHILD(tree, j + 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1098 | j += 4; |
| 1099 | } |
| 1100 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1101 | return (res); |
| 1102 | |
| 1103 | } /* validate_if() */ |
| 1104 | |
| 1105 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1106 | /* parameters: |
| 1107 | * '(' [varargslist] ')' |
| 1108 | * |
| 1109 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1110 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1111 | validate_parameters(tree) |
| 1112 | node *tree; |
| 1113 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1114 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1115 | int res = validate_ntype(tree, parameters) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1116 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1117 | if (res) { |
| 1118 | res = (validate_lparen(CHILD(tree, 0)) |
| 1119 | && validate_rparen(CHILD(tree, nch - 1))); |
| 1120 | if (res && (nch == 3)) |
| 1121 | res = validate_varargslist(CHILD(tree, 1)); |
| 1122 | } |
| 1123 | else |
| 1124 | validate_numnodes(tree, 2, "parameters"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1125 | |
| 1126 | return (res); |
| 1127 | |
| 1128 | } /* validate_parameters() */ |
| 1129 | |
| 1130 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1131 | /* VALIDATE(suite) |
| 1132 | * |
| 1133 | * suite: |
| 1134 | * simple_stmt |
| 1135 | * | NEWLINE INDENT stmt+ DEDENT |
| 1136 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1137 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1138 | validate_suite(tree) |
| 1139 | node *tree; |
| 1140 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1141 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1142 | int res = (validate_ntype(tree, suite) && ((nch == 1) || (nch >= 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1143 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1144 | if (res && (nch == 1)) |
| 1145 | res = validate_simple_stmt(CHILD(tree, 0)); |
| 1146 | else if (res) { |
| 1147 | /* NEWLINE INDENT stmt+ DEDENT */ |
| 1148 | res = (validate_newline(CHILD(tree, 0)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1149 | && validate_indent(CHILD(tree, 1)) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1150 | && validate_stmt(CHILD(tree, 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1151 | && validate_dedent(CHILD(tree, nch - 1))); |
| 1152 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1153 | if (res && (nch > 4)) { |
| 1154 | int i = 3; |
| 1155 | --nch; /* forget the DEDENT */ |
| 1156 | for ( ; res && (i < nch); ++i) |
| 1157 | res = validate_stmt(CHILD(tree, i)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1158 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1159 | else if (nch < 4) |
| 1160 | validate_numnodes(tree, 4, "suite"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1161 | } |
| 1162 | return (res); |
| 1163 | |
| 1164 | } /* validate_suite() */ |
| 1165 | |
| 1166 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1167 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1168 | validate_testlist(tree) |
| 1169 | node *tree; |
| 1170 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1171 | return (validate_repeating_list(tree, testlist, |
| 1172 | validate_test, "testlist")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1173 | |
| 1174 | } /* validate_testlist() */ |
| 1175 | |
| 1176 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1177 | /* VALIDATE(varargslist) |
| 1178 | * |
| 1179 | * varargslist: |
| 1180 | * (fpdef ['=' test] ',')* ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
| 1181 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1182 | * |
| 1183 | * (fpdef ['=' test] ',')* |
| 1184 | * ('*' NAME [',' ('**'|'*' '*') NAME] |
| 1185 | * | ('**'|'*' '*') NAME) |
| 1186 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1187 | * |
| 1188 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1189 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1190 | validate_varargslist(tree) |
| 1191 | node *tree; |
| 1192 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1193 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1194 | int res = validate_ntype(tree, varargslist) && (nch != 0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1195 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1196 | if (res && (nch >= 2) && (TYPE(CHILD(tree, nch - 1)) == NAME)) { |
| 1197 | /* (fpdef ['=' test] ',')* |
| 1198 | * ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
| 1199 | */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1200 | int pos = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1201 | int remaining = nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1202 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1203 | while (res && (TYPE(CHILD(tree, pos)) == fpdef)) { |
| 1204 | res = validate_fpdef(CHILD(tree, pos)); |
| 1205 | if (res) { |
| 1206 | if (TYPE(CHILD(tree, pos + 1)) == EQUAL) { |
| 1207 | res = validate_test(CHILD(tree, pos + 2)); |
| 1208 | pos += 2; |
| 1209 | } |
| 1210 | res = res && validate_comma(CHILD(tree, pos + 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1211 | pos += 2; |
| 1212 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1213 | } |
| 1214 | if (res) { |
| 1215 | remaining = nch - pos; |
| 1216 | res = ((remaining == 2) || (remaining == 3) |
| 1217 | || (remaining == 5) || (remaining == 6)); |
| 1218 | if (!res) |
| 1219 | validate_numnodes(tree, 2, "varargslist"); |
| 1220 | else if (TYPE(CHILD(tree, pos)) == DOUBLESTAR) |
| 1221 | return ((remaining == 2) |
| 1222 | && validate_ntype(CHILD(tree, pos+1), NAME)); |
| 1223 | else { |
| 1224 | res = validate_star(CHILD(tree, pos++)); |
| 1225 | --remaining; |
| 1226 | } |
| 1227 | } |
| 1228 | if (res) { |
| 1229 | if (remaining == 2) { |
| 1230 | res = (validate_star(CHILD(tree, pos)) |
| 1231 | && validate_ntype(CHILD(tree, pos + 1), NAME)); |
| 1232 | } |
| 1233 | else { |
| 1234 | res = validate_ntype(CHILD(tree, pos++), NAME); |
| 1235 | if (res && (remaining >= 4)) { |
| 1236 | res = validate_comma(CHILD(tree, pos)); |
| 1237 | if (--remaining == 3) |
Fred Drake | e1607a8 | 1996-09-11 21:58:26 +0000 | [diff] [blame] | 1238 | res = (validate_star(CHILD(tree, pos + 1)) |
| 1239 | && validate_star(CHILD(tree, pos + 2))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1240 | else |
| 1241 | validate_ntype(CHILD(tree, pos + 1), DOUBLESTAR); |
| 1242 | } |
| 1243 | } |
| 1244 | } |
| 1245 | if (!res && !PyErr_Occurred()) |
| 1246 | err_string("Incorrect validation of variable arguments list."); |
| 1247 | } |
| 1248 | else if (res) { |
| 1249 | /* fpdef ['=' test] (',' fpdef ['=' test])* [','] */ |
| 1250 | if (TYPE(CHILD(tree, nch - 1)) == COMMA) |
| 1251 | --nch; |
| 1252 | |
| 1253 | /* fpdef ['=' test] (',' fpdef ['=' test])* */ |
| 1254 | res = (is_odd(nch) |
| 1255 | && validate_fpdef(CHILD(tree, 0))); |
| 1256 | |
| 1257 | if (res && (nch > 1)) { |
| 1258 | int pos = 1; |
| 1259 | if (TYPE(CHILD(tree, 1)) == EQUAL) { |
| 1260 | res = validate_test(CHILD(tree, 2)); |
| 1261 | pos += 2; |
| 1262 | } |
| 1263 | /* ... (',' fpdef ['=' test])* */ |
| 1264 | for ( ; res && (pos < nch); pos += 2) { |
| 1265 | /* ',' fpdef */ |
| 1266 | res = (validate_comma(CHILD(tree, pos)) |
| 1267 | && validate_fpdef(CHILD(tree, pos + 1))); |
| 1268 | if (res |
| 1269 | && ((nch - pos) > 2) |
| 1270 | && (TYPE(CHILD(tree, pos + 2)) == EQUAL)) { |
| 1271 | /* ['=' test] */ |
| 1272 | res = validate_test(CHILD(tree, pos + 3)); |
| 1273 | pos += 2; |
| 1274 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1275 | } |
| 1276 | } |
| 1277 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1278 | else |
| 1279 | err_string("Improperly formed argument list."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1280 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1281 | return (res); |
| 1282 | |
| 1283 | } /* validate_varargslist() */ |
| 1284 | |
| 1285 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1286 | /* VALIDATE(fpdef) |
| 1287 | * |
| 1288 | * fpdef: |
| 1289 | * NAME |
| 1290 | * | '(' fplist ')' |
| 1291 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1292 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1293 | validate_fpdef(tree) |
| 1294 | node *tree; |
| 1295 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1296 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1297 | int res = validate_ntype(tree, fpdef); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1298 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1299 | if (res) { |
| 1300 | if (nch == 1) |
| 1301 | res = validate_ntype(CHILD(tree, 0), NAME); |
| 1302 | else if (nch == 3) |
| 1303 | res = (validate_lparen(CHILD(tree, 0)) |
| 1304 | && validate_fplist(CHILD(tree, 1)) |
| 1305 | && validate_rparen(CHILD(tree, 2))); |
| 1306 | else |
| 1307 | validate_numnodes(tree, 1, "fpdef"); |
| 1308 | } |
| 1309 | return (res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1310 | |
| 1311 | } /* validate_fpdef() */ |
| 1312 | |
| 1313 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1314 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1315 | validate_fplist(tree) |
| 1316 | node *tree; |
| 1317 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1318 | return (validate_repeating_list(tree, fplist, |
| 1319 | validate_fpdef, "fplist")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1320 | |
| 1321 | } /* validate_fplist() */ |
| 1322 | |
| 1323 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1324 | /* simple_stmt | compound_stmt |
| 1325 | * |
| 1326 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1327 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1328 | validate_stmt(tree) |
| 1329 | node *tree; |
| 1330 | { |
| 1331 | int res = (validate_ntype(tree, stmt) |
| 1332 | && validate_numnodes(tree, 1, "stmt")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1333 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1334 | if (res) { |
| 1335 | tree = CHILD(tree, 0); |
| 1336 | |
| 1337 | if (TYPE(tree) == simple_stmt) |
| 1338 | res = validate_simple_stmt(tree); |
| 1339 | else |
| 1340 | res = validate_compound_stmt(tree); |
| 1341 | } |
| 1342 | return (res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1343 | |
| 1344 | } /* validate_stmt() */ |
| 1345 | |
| 1346 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1347 | /* small_stmt (';' small_stmt)* [';'] NEWLINE |
| 1348 | * |
| 1349 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1350 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1351 | validate_simple_stmt(tree) |
| 1352 | node *tree; |
| 1353 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1354 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1355 | int res = (validate_ntype(tree, simple_stmt) |
| 1356 | && (nch >= 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1357 | && validate_small_stmt(CHILD(tree, 0)) |
| 1358 | && validate_newline(CHILD(tree, nch - 1))); |
| 1359 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1360 | if (nch < 2) |
| 1361 | res = validate_numnodes(tree, 2, "simple_stmt"); |
| 1362 | --nch; /* forget the NEWLINE */ |
| 1363 | if (res && is_even(nch)) |
| 1364 | res = validate_semi(CHILD(tree, --nch)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1365 | if (res && (nch > 2)) { |
| 1366 | int i; |
| 1367 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1368 | for (i = 1; res && (i < nch); i += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1369 | res = (validate_semi(CHILD(tree, i)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1370 | && validate_small_stmt(CHILD(tree, i + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1371 | } |
| 1372 | return (res); |
| 1373 | |
| 1374 | } /* validate_simple_stmt() */ |
| 1375 | |
| 1376 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1377 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1378 | validate_small_stmt(tree) |
| 1379 | node *tree; |
| 1380 | { |
| 1381 | int nch = NCH(tree); |
| 1382 | int res = (validate_numnodes(tree, 1, "small_stmt") |
| 1383 | && ((TYPE(CHILD(tree, 0)) == expr_stmt) |
| 1384 | || (TYPE(CHILD(tree, 0)) == print_stmt) |
| 1385 | || (TYPE(CHILD(tree, 0)) == del_stmt) |
| 1386 | || (TYPE(CHILD(tree, 0)) == pass_stmt) |
| 1387 | || (TYPE(CHILD(tree, 0)) == flow_stmt) |
| 1388 | || (TYPE(CHILD(tree, 0)) == import_stmt) |
| 1389 | || (TYPE(CHILD(tree, 0)) == global_stmt) |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1390 | || (TYPE(CHILD(tree, 0)) == assert_stmt) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1391 | || (TYPE(CHILD(tree, 0)) == exec_stmt))); |
| 1392 | |
| 1393 | if (res) |
| 1394 | res = validate_node(CHILD(tree, 0)); |
| 1395 | else if (nch == 1) { |
| 1396 | char buffer[60]; |
| 1397 | sprintf(buffer, "Unrecognized child node of small_stmt: %d.", |
| 1398 | TYPE(CHILD(tree, 0))); |
| 1399 | err_string(buffer); |
| 1400 | } |
| 1401 | return (res); |
| 1402 | |
| 1403 | } /* validate_small_stmt */ |
| 1404 | |
| 1405 | |
| 1406 | /* compound_stmt: |
| 1407 | * if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef |
| 1408 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1409 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1410 | validate_compound_stmt(tree) |
| 1411 | node *tree; |
| 1412 | { |
| 1413 | int res = (validate_ntype(tree, compound_stmt) |
| 1414 | && validate_numnodes(tree, 1, "compound_stmt")); |
| 1415 | |
| 1416 | if (!res) |
| 1417 | return (0); |
| 1418 | |
| 1419 | tree = CHILD(tree, 0); |
| 1420 | res = ((TYPE(tree) == if_stmt) |
| 1421 | || (TYPE(tree) == while_stmt) |
| 1422 | || (TYPE(tree) == for_stmt) |
| 1423 | || (TYPE(tree) == try_stmt) |
| 1424 | || (TYPE(tree) == funcdef) |
| 1425 | || (TYPE(tree) == classdef)); |
| 1426 | if (res) |
| 1427 | res = validate_node(tree); |
| 1428 | else { |
| 1429 | char buffer[60]; |
| 1430 | sprintf(buffer, "Illegal compound statement type: %d.", TYPE(tree)); |
| 1431 | err_string(buffer); |
| 1432 | } |
| 1433 | return (res); |
| 1434 | |
| 1435 | } /* validate_compound_stmt() */ |
| 1436 | |
| 1437 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1438 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1439 | validate_expr_stmt(tree) |
| 1440 | node *tree; |
| 1441 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1442 | int j; |
| 1443 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1444 | int res = (validate_ntype(tree, expr_stmt) |
| 1445 | && is_odd(nch) |
| 1446 | && validate_testlist(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1447 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1448 | for (j = 1; res && (j < nch); j += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1449 | res = (validate_equal(CHILD(tree, j)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1450 | && validate_testlist(CHILD(tree, j + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1451 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1452 | return (res); |
| 1453 | |
| 1454 | } /* validate_expr_stmt() */ |
| 1455 | |
| 1456 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1457 | /* print_stmt: |
| 1458 | * |
| 1459 | * 'print' (test ',')* [test] |
| 1460 | * |
| 1461 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1462 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1463 | validate_print_stmt(tree) |
| 1464 | node *tree; |
| 1465 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1466 | int j; |
| 1467 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1468 | int res = (validate_ntype(tree, print_stmt) |
| 1469 | && (nch != 0) |
| 1470 | && validate_name(CHILD(tree, 0), "print")); |
| 1471 | |
| 1472 | if (res && is_even(nch)) { |
| 1473 | res = validate_test(CHILD(tree, nch - 1)); |
| 1474 | --nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1475 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1476 | else if (!res && !PyErr_Occurred()) |
| 1477 | validate_numnodes(tree, 1, "print_stmt"); |
| 1478 | for (j = 1; res && (j < nch); j += 2) |
| 1479 | res = (validate_test(CHILD(tree, j)) |
| 1480 | && validate_ntype(CHILD(tree, j + 1), COMMA)); |
| 1481 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1482 | return (res); |
| 1483 | |
| 1484 | } /* validate_print_stmt() */ |
| 1485 | |
| 1486 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1487 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1488 | validate_del_stmt(tree) |
| 1489 | node *tree; |
| 1490 | { |
| 1491 | return (validate_numnodes(tree, 2, "del_stmt") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1492 | && validate_name(CHILD(tree, 0), "del") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1493 | && validate_exprlist(CHILD(tree, 1))); |
| 1494 | |
| 1495 | } /* validate_del_stmt() */ |
| 1496 | |
| 1497 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1498 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1499 | validate_return_stmt(tree) |
| 1500 | node *tree; |
| 1501 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1502 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1503 | int res = (validate_ntype(tree, return_stmt) |
| 1504 | && ((nch == 1) || (nch == 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1505 | && validate_name(CHILD(tree, 0), "return")); |
| 1506 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1507 | if (res && (nch == 2)) |
| 1508 | res = validate_testlist(CHILD(tree, 1)); |
| 1509 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1510 | return (res); |
| 1511 | |
| 1512 | } /* validate_return_stmt() */ |
| 1513 | |
| 1514 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1515 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1516 | validate_raise_stmt(tree) |
| 1517 | node *tree; |
| 1518 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1519 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1520 | int res = (validate_ntype(tree, raise_stmt) |
Fred Drake | c542bc7 | 1998-04-10 04:43:28 +0000 | [diff] [blame] | 1521 | && ((nch == 1) || (nch == 2) || (nch == 4) || (nch == 6))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1522 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1523 | if (res) { |
Fred Drake | c542bc7 | 1998-04-10 04:43:28 +0000 | [diff] [blame] | 1524 | res = validate_name(CHILD(tree, 0), "raise"); |
| 1525 | if (res && (nch >= 2)) |
| 1526 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1527 | if (res && nch > 2) { |
| 1528 | res = (validate_comma(CHILD(tree, 2)) |
| 1529 | && validate_test(CHILD(tree, 3))); |
| 1530 | if (res && (nch > 4)) |
| 1531 | res = (validate_comma(CHILD(tree, 4)) |
| 1532 | && validate_test(CHILD(tree, 5))); |
| 1533 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1534 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1535 | else |
| 1536 | validate_numnodes(tree, 2, "raise"); |
| 1537 | if (res && (nch == 4)) |
| 1538 | res = (validate_comma(CHILD(tree, 2)) |
| 1539 | && validate_test(CHILD(tree, 3))); |
| 1540 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1541 | return (res); |
| 1542 | |
| 1543 | } /* validate_raise_stmt() */ |
| 1544 | |
| 1545 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1546 | /* import_stmt: |
| 1547 | * |
| 1548 | * 'import' dotted_name (',' dotted_name)* |
| 1549 | * | 'from' dotted_name 'import' ('*' | NAME (',' NAME)*) |
| 1550 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1551 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1552 | validate_import_stmt(tree) |
| 1553 | node *tree; |
| 1554 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1555 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1556 | int res = (validate_ntype(tree, import_stmt) |
| 1557 | && (nch >= 2) && is_even(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1558 | && validate_ntype(CHILD(tree, 0), NAME) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1559 | && validate_ntype(CHILD(tree, 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1560 | |
| 1561 | if (res && (strcmp(STR(CHILD(tree, 0)), "import") == 0)) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1562 | int j; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1563 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1564 | for (j = 2; res && (j < nch); j += 2) |
| 1565 | res = (validate_comma(CHILD(tree, j)) |
| 1566 | && validate_ntype(CHILD(tree, j + 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1567 | } |
| 1568 | else if (res && validate_name(CHILD(tree, 0), "from")) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1569 | res = ((nch >= 4) && is_even(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1570 | && validate_name(CHILD(tree, 2), "import")); |
| 1571 | if (nch == 4) { |
| 1572 | res = ((TYPE(CHILD(tree, 3)) == NAME) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1573 | || (TYPE(CHILD(tree, 3)) == STAR)); |
| 1574 | if (!res) |
| 1575 | err_string("Illegal import statement."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1576 | } |
| 1577 | else { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1578 | /* 'from' NAME 'import' NAME (',' NAME)+ */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1579 | int j; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1580 | res = validate_ntype(CHILD(tree, 3), NAME); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1581 | for (j = 4; res && (j < nch); j += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1582 | res = (validate_comma(CHILD(tree, j)) |
| 1583 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1584 | } |
| 1585 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1586 | else |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1587 | res = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1588 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1589 | return (res); |
| 1590 | |
| 1591 | } /* validate_import_stmt() */ |
| 1592 | |
| 1593 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1594 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1595 | validate_global_stmt(tree) |
| 1596 | node *tree; |
| 1597 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1598 | int j; |
| 1599 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1600 | int res = (validate_ntype(tree, global_stmt) |
| 1601 | && is_even(nch) && (nch >= 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1602 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1603 | if (res) |
| 1604 | res = (validate_name(CHILD(tree, 0), "global") |
| 1605 | && validate_ntype(CHILD(tree, 1), NAME)); |
| 1606 | for (j = 2; res && (j < nch); j += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1607 | res = (validate_comma(CHILD(tree, j)) |
| 1608 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1609 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1610 | return (res); |
| 1611 | |
| 1612 | } /* validate_global_stmt() */ |
| 1613 | |
| 1614 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1615 | /* exec_stmt: |
| 1616 | * |
| 1617 | * 'exec' expr ['in' test [',' test]] |
| 1618 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1619 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1620 | validate_exec_stmt(tree) |
| 1621 | node *tree; |
| 1622 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1623 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1624 | int res = (validate_ntype(tree, exec_stmt) |
| 1625 | && ((nch == 2) || (nch == 4) || (nch == 6)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1626 | && validate_name(CHILD(tree, 0), "exec") |
| 1627 | && validate_expr(CHILD(tree, 1))); |
| 1628 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1629 | if (!res && !PyErr_Occurred()) |
| 1630 | err_string("Illegal exec statement."); |
| 1631 | if (res && (nch > 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1632 | res = (validate_name(CHILD(tree, 2), "in") |
| 1633 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1634 | if (res && (nch == 6)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1635 | res = (validate_comma(CHILD(tree, 4)) |
| 1636 | && validate_test(CHILD(tree, 5))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1637 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1638 | return (res); |
| 1639 | |
| 1640 | } /* validate_exec_stmt() */ |
| 1641 | |
| 1642 | |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1643 | /* assert_stmt: |
| 1644 | * |
| 1645 | * 'assert' test [',' test] |
| 1646 | */ |
| 1647 | static int |
| 1648 | validate_assert_stmt(tree) |
| 1649 | node *tree; |
| 1650 | { |
| 1651 | int nch = NCH(tree); |
| 1652 | int res = (validate_ntype(tree, assert_stmt) |
| 1653 | && ((nch == 2) || (nch == 4)) |
| 1654 | && (validate_name(CHILD(tree, 0), "__assert__") || |
| 1655 | validate_name(CHILD(tree, 0), "assert")) |
| 1656 | && validate_test(CHILD(tree, 1))); |
| 1657 | |
| 1658 | if (!res && !PyErr_Occurred()) |
| 1659 | err_string("Illegal assert statement."); |
| 1660 | if (res && (nch > 2)) |
| 1661 | res = (validate_comma(CHILD(tree, 2)) |
| 1662 | && validate_test(CHILD(tree, 3))); |
| 1663 | |
| 1664 | return (res); |
| 1665 | |
| 1666 | } /* validate_assert_stmt() */ |
| 1667 | |
| 1668 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1669 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1670 | validate_while(tree) |
| 1671 | node *tree; |
| 1672 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1673 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1674 | int res = (validate_ntype(tree, while_stmt) |
| 1675 | && ((nch == 4) || (nch == 7)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1676 | && validate_name(CHILD(tree, 0), "while") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1677 | && validate_test(CHILD(tree, 1)) |
| 1678 | && validate_colon(CHILD(tree, 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1679 | && validate_suite(CHILD(tree, 3))); |
| 1680 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1681 | if (res && (nch == 7)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1682 | res = (validate_name(CHILD(tree, 4), "else") |
| 1683 | && validate_colon(CHILD(tree, 5)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1684 | && validate_suite(CHILD(tree, 6))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1685 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1686 | return (res); |
| 1687 | |
| 1688 | } /* validate_while() */ |
| 1689 | |
| 1690 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1691 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1692 | validate_for(tree) |
| 1693 | node *tree; |
| 1694 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1695 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1696 | int res = (validate_ntype(tree, for_stmt) |
| 1697 | && ((nch == 6) || (nch == 9)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1698 | && validate_name(CHILD(tree, 0), "for") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1699 | && validate_exprlist(CHILD(tree, 1)) |
| 1700 | && validate_name(CHILD(tree, 2), "in") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1701 | && validate_testlist(CHILD(tree, 3)) |
| 1702 | && validate_colon(CHILD(tree, 4)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1703 | && validate_suite(CHILD(tree, 5))); |
| 1704 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1705 | if (res && (nch == 9)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1706 | res = (validate_name(CHILD(tree, 6), "else") |
| 1707 | && validate_colon(CHILD(tree, 7)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1708 | && validate_suite(CHILD(tree, 8))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1709 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1710 | return (res); |
| 1711 | |
| 1712 | } /* validate_for() */ |
| 1713 | |
| 1714 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1715 | /* try_stmt: |
| 1716 | * 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
| 1717 | * | 'try' ':' suite 'finally' ':' suite |
| 1718 | * |
| 1719 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1720 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1721 | validate_try(tree) |
| 1722 | node *tree; |
| 1723 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1724 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1725 | int pos = 3; |
| 1726 | int res = (validate_ntype(tree, try_stmt) |
| 1727 | && (nch >= 6) && ((nch % 3) == 0)); |
| 1728 | |
| 1729 | if (res) |
| 1730 | res = (validate_name(CHILD(tree, 0), "try") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1731 | && validate_colon(CHILD(tree, 1)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1732 | && validate_suite(CHILD(tree, 2)) |
| 1733 | && validate_colon(CHILD(tree, nch - 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1734 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1735 | else { |
| 1736 | const char* name = "execpt"; |
| 1737 | char buffer[60]; |
| 1738 | if (TYPE(CHILD(tree, nch - 3)) != except_clause) |
| 1739 | name = STR(CHILD(tree, nch - 3)); |
| 1740 | sprintf(buffer, "Illegal number of children for try/%s node.", name); |
| 1741 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1742 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1743 | /* Skip past except_clause sections: */ |
| 1744 | while (res && (TYPE(CHILD(tree, pos)) == except_clause)) { |
| 1745 | res = (validate_except_clause(CHILD(tree, pos)) |
| 1746 | && validate_colon(CHILD(tree, pos + 1)) |
| 1747 | && validate_suite(CHILD(tree, pos + 2))); |
| 1748 | pos += 3; |
| 1749 | } |
| 1750 | if (res && (pos < nch)) { |
| 1751 | res = validate_ntype(CHILD(tree, pos), NAME); |
| 1752 | if (res && (strcmp(STR(CHILD(tree, pos)), "finally") == 0)) |
| 1753 | res = (validate_numnodes(tree, 6, "try/finally") |
| 1754 | && validate_colon(CHILD(tree, 4)) |
| 1755 | && validate_suite(CHILD(tree, 5))); |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1756 | else if (res) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1757 | if (nch == (pos + 3)) { |
| 1758 | res = ((strcmp(STR(CHILD(tree, pos)), "except") == 0) |
| 1759 | || (strcmp(STR(CHILD(tree, pos)), "else") == 0)); |
| 1760 | if (!res) |
| 1761 | err_string("Illegal trailing triple in try statement."); |
| 1762 | } |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1763 | else if (nch == (pos + 6)) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1764 | res = (validate_name(CHILD(tree, pos), "except") |
| 1765 | && validate_colon(CHILD(tree, pos + 1)) |
| 1766 | && validate_suite(CHILD(tree, pos + 2)) |
| 1767 | && validate_name(CHILD(tree, pos + 3), "else")); |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1768 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1769 | else |
| 1770 | res = validate_numnodes(tree, pos + 3, "try/except"); |
Guido van Rossum | 730806d | 1998-04-10 22:27:42 +0000 | [diff] [blame] | 1771 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1772 | } |
| 1773 | return (res); |
| 1774 | |
| 1775 | } /* validate_try() */ |
| 1776 | |
| 1777 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1778 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1779 | validate_except_clause(tree) |
| 1780 | node *tree; |
| 1781 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1782 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1783 | int res = (validate_ntype(tree, except_clause) |
| 1784 | && ((nch == 1) || (nch == 2) || (nch == 4)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1785 | && validate_name(CHILD(tree, 0), "except")); |
| 1786 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1787 | if (res && (nch > 1)) |
| 1788 | res = validate_test(CHILD(tree, 1)); |
| 1789 | if (res && (nch == 4)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1790 | res = (validate_comma(CHILD(tree, 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1791 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1792 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1793 | return (res); |
| 1794 | |
| 1795 | } /* validate_except_clause() */ |
| 1796 | |
| 1797 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1798 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1799 | validate_test(tree) |
| 1800 | node *tree; |
| 1801 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1802 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1803 | int res = validate_ntype(tree, test) && is_odd(nch); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1804 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1805 | if (res && (TYPE(CHILD(tree, 0)) == lambdef)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1806 | res = ((nch == 1) |
| 1807 | && validate_lambdef(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1808 | else if (res) { |
| 1809 | int pos; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1810 | res = validate_and_test(CHILD(tree, 0)); |
| 1811 | for (pos = 1; res && (pos < nch); pos += 2) |
| 1812 | res = (validate_name(CHILD(tree, pos), "or") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1813 | && validate_and_test(CHILD(tree, pos + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1814 | } |
| 1815 | return (res); |
| 1816 | |
| 1817 | } /* validate_test() */ |
| 1818 | |
| 1819 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1820 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1821 | validate_and_test(tree) |
| 1822 | node *tree; |
| 1823 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1824 | int pos; |
| 1825 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1826 | int res = (validate_ntype(tree, and_test) |
| 1827 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1828 | && validate_not_test(CHILD(tree, 0))); |
| 1829 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1830 | for (pos = 1; res && (pos < nch); pos += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1831 | res = (validate_name(CHILD(tree, pos), "and") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1832 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1833 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1834 | return (res); |
| 1835 | |
| 1836 | } /* validate_and_test() */ |
| 1837 | |
| 1838 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1839 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1840 | validate_not_test(tree) |
| 1841 | node *tree; |
| 1842 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1843 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1844 | int res = validate_ntype(tree, not_test) && ((nch == 1) || (nch == 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1845 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1846 | if (res) { |
| 1847 | if (nch == 2) |
| 1848 | res = (validate_name(CHILD(tree, 0), "not") |
| 1849 | && validate_not_test(CHILD(tree, 1))); |
| 1850 | else if (nch == 1) |
| 1851 | res = validate_comparison(CHILD(tree, 0)); |
| 1852 | } |
| 1853 | return (res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1854 | |
| 1855 | } /* validate_not_test() */ |
| 1856 | |
| 1857 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1858 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1859 | validate_comparison(tree) |
| 1860 | node *tree; |
| 1861 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1862 | int pos; |
| 1863 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1864 | int res = (validate_ntype(tree, comparison) |
| 1865 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1866 | && validate_expr(CHILD(tree, 0))); |
| 1867 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1868 | for (pos = 1; res && (pos < nch); pos += 2) |
| 1869 | res = (validate_comp_op(CHILD(tree, pos)) |
| 1870 | && validate_expr(CHILD(tree, pos + 1))); |
| 1871 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1872 | return (res); |
| 1873 | |
| 1874 | } /* validate_comparison() */ |
| 1875 | |
| 1876 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1877 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1878 | validate_comp_op(tree) |
| 1879 | node *tree; |
| 1880 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1881 | int res = 0; |
| 1882 | int nch = NCH(tree); |
| 1883 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1884 | if (!validate_ntype(tree, comp_op)) |
| 1885 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1886 | if (nch == 1) { |
| 1887 | /* |
| 1888 | * Only child will be a terminal with a well-defined symbolic name |
| 1889 | * or a NAME with a string of either 'is' or 'in' |
| 1890 | */ |
| 1891 | tree = CHILD(tree, 0); |
| 1892 | switch (TYPE(tree)) { |
| 1893 | case LESS: |
| 1894 | case GREATER: |
| 1895 | case EQEQUAL: |
| 1896 | case EQUAL: |
| 1897 | case LESSEQUAL: |
| 1898 | case GREATEREQUAL: |
| 1899 | case NOTEQUAL: |
| 1900 | res = 1; |
| 1901 | break; |
| 1902 | case NAME: |
| 1903 | res = ((strcmp(STR(tree), "in") == 0) |
| 1904 | || (strcmp(STR(tree), "is") == 0)); |
| 1905 | if (!res) { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1906 | char buff[128]; |
| 1907 | sprintf(buff, "Illegal operator: '%s'.", STR(tree)); |
| 1908 | err_string(buff); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1909 | } |
| 1910 | break; |
| 1911 | default: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1912 | err_string("Illegal comparison operator type."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1913 | break; |
| 1914 | } |
| 1915 | } |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 1916 | else if ((res = validate_numnodes(tree, 2, "comp_op")) != 0) { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1917 | res = (validate_ntype(CHILD(tree, 0), NAME) |
| 1918 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1919 | && (((strcmp(STR(CHILD(tree, 0)), "is") == 0) |
| 1920 | && (strcmp(STR(CHILD(tree, 1)), "not") == 0)) |
| 1921 | || ((strcmp(STR(CHILD(tree, 0)), "not") == 0) |
| 1922 | && (strcmp(STR(CHILD(tree, 1)), "in") == 0)))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1923 | if (!res && !PyErr_Occurred()) |
| 1924 | err_string("Unknown comparison operator."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1925 | } |
| 1926 | return (res); |
| 1927 | |
| 1928 | } /* validate_comp_op() */ |
| 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_expr(tree) |
| 1933 | node *tree; |
| 1934 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1935 | int j; |
| 1936 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1937 | int res = (validate_ntype(tree, expr) |
| 1938 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1939 | && validate_xor_expr(CHILD(tree, 0))); |
| 1940 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1941 | for (j = 2; res && (j < nch); j += 2) |
| 1942 | res = (validate_xor_expr(CHILD(tree, j)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1943 | && validate_vbar(CHILD(tree, j - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1944 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1945 | return (res); |
| 1946 | |
| 1947 | } /* validate_expr() */ |
| 1948 | |
| 1949 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1950 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1951 | validate_xor_expr(tree) |
| 1952 | node *tree; |
| 1953 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1954 | int j; |
| 1955 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1956 | int res = (validate_ntype(tree, xor_expr) |
| 1957 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1958 | && validate_and_expr(CHILD(tree, 0))); |
| 1959 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1960 | for (j = 2; res && (j < nch); j += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1961 | res = (validate_circumflex(CHILD(tree, j - 1)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1962 | && validate_and_expr(CHILD(tree, j))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1963 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1964 | return (res); |
| 1965 | |
| 1966 | } /* validate_xor_expr() */ |
| 1967 | |
| 1968 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1969 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1970 | validate_and_expr(tree) |
| 1971 | node *tree; |
| 1972 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1973 | int pos; |
| 1974 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1975 | int res = (validate_ntype(tree, and_expr) |
| 1976 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1977 | && validate_shift_expr(CHILD(tree, 0))); |
| 1978 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1979 | for (pos = 1; res && (pos < nch); pos += 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1980 | res = (validate_ampersand(CHILD(tree, pos)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1981 | && validate_shift_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1982 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1983 | return (res); |
| 1984 | |
| 1985 | } /* validate_and_expr() */ |
| 1986 | |
| 1987 | |
| 1988 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1989 | validate_chain_two_ops(tree, termvalid, op1, op2) |
| 1990 | node *tree; |
| 1991 | int (*termvalid)(); |
| 1992 | int op1; |
| 1993 | int op2; |
| 1994 | { |
| 1995 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1996 | int nch = NCH(tree); |
| 1997 | int res = (is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1998 | && (*termvalid)(CHILD(tree, 0))); |
| 1999 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2000 | for ( ; res && (pos < nch); pos += 2) { |
| 2001 | if (TYPE(CHILD(tree, pos)) != op1) |
| 2002 | res = validate_ntype(CHILD(tree, pos), op2); |
| 2003 | if (res) |
| 2004 | res = (*termvalid)(CHILD(tree, pos + 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2005 | } |
| 2006 | return (res); |
| 2007 | |
| 2008 | } /* validate_chain_two_ops() */ |
| 2009 | |
| 2010 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2011 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2012 | validate_shift_expr(tree) |
| 2013 | node *tree; |
| 2014 | { |
| 2015 | return (validate_ntype(tree, shift_expr) |
| 2016 | && validate_chain_two_ops(tree, validate_arith_expr, |
| 2017 | LEFTSHIFT, RIGHTSHIFT)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2018 | |
| 2019 | } /* validate_shift_expr() */ |
| 2020 | |
| 2021 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2022 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2023 | validate_arith_expr(tree) |
| 2024 | node *tree; |
| 2025 | { |
| 2026 | return (validate_ntype(tree, arith_expr) |
| 2027 | && validate_chain_two_ops(tree, validate_term, PLUS, MINUS)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2028 | |
| 2029 | } /* validate_arith_expr() */ |
| 2030 | |
| 2031 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2032 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2033 | validate_term(tree) |
| 2034 | node *tree; |
| 2035 | { |
| 2036 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2037 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2038 | int res = (validate_ntype(tree, term) |
| 2039 | && is_odd(nch) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2040 | && validate_factor(CHILD(tree, 0))); |
| 2041 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2042 | for ( ; res && (pos < nch); pos += 2) |
| 2043 | res = (((TYPE(CHILD(tree, pos)) == STAR) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2044 | || (TYPE(CHILD(tree, pos)) == SLASH) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2045 | || (TYPE(CHILD(tree, pos)) == PERCENT)) |
| 2046 | && validate_factor(CHILD(tree, pos + 1))); |
| 2047 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2048 | return (res); |
| 2049 | |
| 2050 | } /* validate_term() */ |
| 2051 | |
| 2052 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2053 | /* factor: |
| 2054 | * |
| 2055 | * factor: ('+'|'-'|'~') factor | power |
| 2056 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2057 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2058 | validate_factor(tree) |
| 2059 | node *tree; |
| 2060 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2061 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2062 | int res = (validate_ntype(tree, factor) |
| 2063 | && (((nch == 2) |
| 2064 | && ((TYPE(CHILD(tree, 0)) == PLUS) |
| 2065 | || (TYPE(CHILD(tree, 0)) == MINUS) |
| 2066 | || (TYPE(CHILD(tree, 0)) == TILDE)) |
| 2067 | && validate_factor(CHILD(tree, 1))) |
| 2068 | || ((nch == 1) |
| 2069 | && validate_power(CHILD(tree, 0))))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2070 | return (res); |
| 2071 | |
| 2072 | } /* validate_factor() */ |
| 2073 | |
| 2074 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2075 | /* power: |
| 2076 | * |
| 2077 | * power: atom trailer* ('**' factor)* |
| 2078 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2079 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2080 | validate_power(tree) |
| 2081 | node *tree; |
| 2082 | { |
| 2083 | int pos = 1; |
| 2084 | int nch = NCH(tree); |
| 2085 | int res = (validate_ntype(tree, power) && (nch >= 1) |
| 2086 | && validate_atom(CHILD(tree, 0))); |
| 2087 | |
| 2088 | while (res && (pos < nch) && (TYPE(CHILD(tree, pos)) == trailer)) |
| 2089 | res = validate_trailer(CHILD(tree, pos++)); |
| 2090 | if (res && (pos < nch)) { |
| 2091 | if (!is_even(nch - pos)) { |
| 2092 | err_string("Illegal number of nodes for 'power'."); |
| 2093 | return (0); |
| 2094 | } |
| 2095 | for ( ; res && (pos < (nch - 1)); pos += 2) |
| 2096 | res = (validate_doublestar(CHILD(tree, pos)) |
| 2097 | && validate_factor(CHILD(tree, pos + 1))); |
| 2098 | } |
| 2099 | return (res); |
| 2100 | |
| 2101 | } /* validate_power() */ |
| 2102 | |
| 2103 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2104 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2105 | validate_atom(tree) |
| 2106 | node *tree; |
| 2107 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2108 | int pos; |
| 2109 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2110 | int res = validate_ntype(tree, atom) && (nch >= 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2111 | |
| 2112 | if (res) { |
| 2113 | switch (TYPE(CHILD(tree, 0))) { |
| 2114 | case LPAR: |
| 2115 | res = ((nch <= 3) |
| 2116 | && (validate_rparen(CHILD(tree, nch - 1)))); |
| 2117 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2118 | if (res && (nch == 3)) |
| 2119 | res = validate_testlist(CHILD(tree, 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2120 | break; |
| 2121 | case LSQB: |
| 2122 | res = ((nch <= 3) |
| 2123 | && validate_ntype(CHILD(tree, nch - 1), RSQB)); |
| 2124 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2125 | if (res && (nch == 3)) |
| 2126 | res = validate_testlist(CHILD(tree, 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2127 | break; |
| 2128 | case LBRACE: |
| 2129 | res = ((nch <= 3) |
| 2130 | && validate_ntype(CHILD(tree, nch - 1), RBRACE)); |
| 2131 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2132 | if (res && (nch == 3)) |
| 2133 | res = validate_dictmaker(CHILD(tree, 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2134 | break; |
| 2135 | case BACKQUOTE: |
| 2136 | res = ((nch == 3) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2137 | && validate_testlist(CHILD(tree, 1)) |
| 2138 | && validate_ntype(CHILD(tree, 2), BACKQUOTE)); |
| 2139 | break; |
| 2140 | case NAME: |
| 2141 | case NUMBER: |
| 2142 | res = (nch == 1); |
| 2143 | break; |
| 2144 | case STRING: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2145 | for (pos = 1; res && (pos < nch); ++pos) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2146 | res = validate_ntype(CHILD(tree, pos), STRING); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2147 | break; |
| 2148 | default: |
| 2149 | res = 0; |
| 2150 | break; |
| 2151 | } |
| 2152 | } |
| 2153 | return (res); |
| 2154 | |
| 2155 | } /* validate_atom() */ |
| 2156 | |
| 2157 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2158 | /* funcdef: |
| 2159 | * 'def' NAME parameters ':' suite |
| 2160 | * |
| 2161 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2162 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2163 | validate_funcdef(tree) |
| 2164 | node *tree; |
| 2165 | { |
| 2166 | return (validate_ntype(tree, funcdef) |
| 2167 | && validate_numnodes(tree, 5, "funcdef") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2168 | && validate_name(CHILD(tree, 0), "def") |
| 2169 | && validate_ntype(CHILD(tree, 1), NAME) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2170 | && validate_colon(CHILD(tree, 3)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2171 | && validate_parameters(CHILD(tree, 2)) |
| 2172 | && validate_suite(CHILD(tree, 4))); |
| 2173 | |
| 2174 | } /* validate_funcdef() */ |
| 2175 | |
| 2176 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2177 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2178 | validate_lambdef(tree) |
| 2179 | node *tree; |
| 2180 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2181 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2182 | int res = (validate_ntype(tree, lambdef) |
| 2183 | && ((nch == 3) || (nch == 4)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2184 | && validate_name(CHILD(tree, 0), "lambda") |
| 2185 | && validate_colon(CHILD(tree, nch - 2)) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2186 | && validate_test(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2187 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2188 | if (res && (nch == 4)) |
| 2189 | res = validate_varargslist(CHILD(tree, 1)); |
| 2190 | else if (!res && !PyErr_Occurred()) |
| 2191 | validate_numnodes(tree, 3, "lambdef"); |
| 2192 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2193 | return (res); |
| 2194 | |
| 2195 | } /* validate_lambdef() */ |
| 2196 | |
| 2197 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2198 | /* arglist: |
| 2199 | * |
| 2200 | * argument (',' argument)* [','] |
| 2201 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2202 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2203 | validate_arglist(tree) |
| 2204 | node *tree; |
| 2205 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2206 | return (validate_repeating_list(tree, arglist, |
| 2207 | validate_argument, "arglist")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2208 | |
| 2209 | } /* validate_arglist() */ |
| 2210 | |
| 2211 | |
| 2212 | |
| 2213 | /* argument: |
| 2214 | * |
| 2215 | * [test '='] test |
| 2216 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2217 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2218 | validate_argument(tree) |
| 2219 | node *tree; |
| 2220 | { |
| 2221 | int nch = NCH(tree); |
| 2222 | int res = (validate_ntype(tree, argument) |
| 2223 | && ((nch == 1) || (nch == 3)) |
| 2224 | && validate_test(CHILD(tree, 0))); |
| 2225 | |
| 2226 | if (res && (nch == 3)) |
| 2227 | res = (validate_equal(CHILD(tree, 1)) |
| 2228 | && validate_test(CHILD(tree, 2))); |
| 2229 | |
| 2230 | return (res); |
| 2231 | |
| 2232 | } /* validate_argument() */ |
| 2233 | |
| 2234 | |
| 2235 | |
| 2236 | /* trailer: |
| 2237 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2238 | * '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2239 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2240 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2241 | validate_trailer(tree) |
| 2242 | node *tree; |
| 2243 | { |
| 2244 | int nch = NCH(tree); |
| 2245 | int res = validate_ntype(tree, trailer) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2246 | |
| 2247 | if (res) { |
| 2248 | switch (TYPE(CHILD(tree, 0))) { |
| 2249 | case LPAR: |
| 2250 | res = validate_rparen(CHILD(tree, nch - 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2251 | if (res && (nch == 3)) |
| 2252 | res = validate_arglist(CHILD(tree, 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2253 | break; |
| 2254 | case LSQB: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2255 | res = (validate_numnodes(tree, 3, "trailer") |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2256 | && validate_subscriptlist(CHILD(tree, 1)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2257 | && validate_ntype(CHILD(tree, 2), RSQB)); |
| 2258 | break; |
| 2259 | case DOT: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2260 | res = (validate_numnodes(tree, 2, "trailer") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2261 | && validate_ntype(CHILD(tree, 1), NAME)); |
| 2262 | break; |
| 2263 | default: |
| 2264 | res = 0; |
| 2265 | break; |
| 2266 | } |
| 2267 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2268 | else |
| 2269 | validate_numnodes(tree, 2, "trailer"); |
| 2270 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2271 | return (res); |
| 2272 | |
| 2273 | } /* validate_trailer() */ |
| 2274 | |
| 2275 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2276 | /* subscriptlist: |
| 2277 | * |
| 2278 | * subscript (',' subscript)* [','] |
| 2279 | */ |
| 2280 | static int |
| 2281 | validate_subscriptlist(tree) |
| 2282 | node *tree; |
| 2283 | { |
| 2284 | return (validate_repeating_list(tree, subscriptlist, |
| 2285 | validate_subscript, "subscriptlist")); |
| 2286 | |
| 2287 | } /* validate_subscriptlist() */ |
| 2288 | |
| 2289 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2290 | /* subscript: |
| 2291 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2292 | * '.' '.' '.' | test | [test] ':' [test] [sliceop] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2293 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2294 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2295 | validate_subscript(tree) |
| 2296 | node *tree; |
| 2297 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2298 | int offset = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2299 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2300 | int res = validate_ntype(tree, subscript) && (nch >= 1) && (nch <= 4); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2301 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2302 | if (!res) { |
| 2303 | if (!PyErr_Occurred()) |
| 2304 | err_string("invalid number of arguments for subscript node"); |
| 2305 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2306 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2307 | if (TYPE(CHILD(tree, 0)) == DOT) |
| 2308 | /* take care of ('.' '.' '.') possibility */ |
| 2309 | return (validate_numnodes(tree, 3, "subscript") |
| 2310 | && validate_dot(CHILD(tree, 0)) |
| 2311 | && validate_dot(CHILD(tree, 1)) |
| 2312 | && validate_dot(CHILD(tree, 2))); |
| 2313 | if (nch == 1) { |
| 2314 | if (TYPE(CHILD(tree, 0)) == test) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2315 | res = validate_test(CHILD(tree, 0)); |
| 2316 | else |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2317 | res = validate_colon(CHILD(tree, 0)); |
| 2318 | return (res); |
| 2319 | } |
| 2320 | /* Must be [test] ':' [test] [sliceop], |
| 2321 | * but at least one of the optional components will |
| 2322 | * be present, but we don't know which yet. |
| 2323 | */ |
| 2324 | if ((TYPE(CHILD(tree, 0)) != COLON) || (nch == 4)) { |
| 2325 | res = validate_test(CHILD(tree, 0)); |
| 2326 | offset = 1; |
| 2327 | } |
| 2328 | if (res) |
| 2329 | res = validate_colon(CHILD(tree, offset)); |
| 2330 | if (res) { |
| 2331 | int rem = nch - ++offset; |
| 2332 | if (rem) { |
| 2333 | if (TYPE(CHILD(tree, offset)) == test) { |
| 2334 | res = validate_test(CHILD(tree, offset)); |
| 2335 | ++offset; |
| 2336 | --rem; |
| 2337 | } |
| 2338 | if (res && rem) |
| 2339 | res = validate_sliceop(CHILD(tree, offset)); |
| 2340 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2341 | } |
| 2342 | return (res); |
| 2343 | |
| 2344 | } /* validate_subscript() */ |
| 2345 | |
| 2346 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2347 | static int |
| 2348 | validate_sliceop(tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2349 | node *tree; |
| 2350 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2351 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2352 | int res = ((nch == 1) || validate_numnodes(tree, 2, "sliceop")) |
| 2353 | && validate_ntype(tree, sliceop); |
| 2354 | if (!res && !PyErr_Occurred()) { |
| 2355 | validate_numnodes(tree, 1, "sliceop"); |
| 2356 | res = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2357 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2358 | if (res) |
| 2359 | res = validate_colon(CHILD(tree, 0)); |
| 2360 | if (res && (nch == 2)) |
| 2361 | res = validate_test(CHILD(tree, 1)); |
| 2362 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2363 | return (res); |
| 2364 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2365 | } /* validate_sliceop() */ |
| 2366 | |
| 2367 | |
| 2368 | static int |
| 2369 | validate_exprlist(tree) |
| 2370 | node *tree; |
| 2371 | { |
| 2372 | return (validate_repeating_list(tree, exprlist, |
| 2373 | validate_expr, "exprlist")); |
| 2374 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2375 | } /* validate_exprlist() */ |
| 2376 | |
| 2377 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2378 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2379 | validate_dictmaker(tree) |
| 2380 | node *tree; |
| 2381 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2382 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2383 | int res = (validate_ntype(tree, dictmaker) |
| 2384 | && (nch >= 3) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2385 | && validate_test(CHILD(tree, 0)) |
| 2386 | && validate_colon(CHILD(tree, 1)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2387 | && validate_test(CHILD(tree, 2))); |
| 2388 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2389 | if (res && ((nch % 4) == 0)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2390 | res = validate_comma(CHILD(tree, --nch)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2391 | else if (res) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2392 | res = ((nch % 4) == 3); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2393 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2394 | if (res && (nch > 3)) { |
| 2395 | int pos = 3; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2396 | /* ( ',' test ':' test )* */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2397 | while (res && (pos < nch)) { |
| 2398 | res = (validate_comma(CHILD(tree, pos)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2399 | && validate_test(CHILD(tree, pos + 1)) |
| 2400 | && validate_colon(CHILD(tree, pos + 2)) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2401 | && validate_test(CHILD(tree, pos + 3))); |
| 2402 | pos += 4; |
| 2403 | } |
| 2404 | } |
| 2405 | return (res); |
| 2406 | |
| 2407 | } /* validate_dictmaker() */ |
| 2408 | |
| 2409 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2410 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2411 | validate_eval_input(tree) |
| 2412 | node *tree; |
| 2413 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2414 | int pos; |
| 2415 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2416 | int res = (validate_ntype(tree, eval_input) |
| 2417 | && (nch >= 2) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2418 | && validate_testlist(CHILD(tree, 0)) |
| 2419 | && validate_ntype(CHILD(tree, nch - 1), ENDMARKER)); |
| 2420 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2421 | for (pos = 1; res && (pos < (nch - 1)); ++pos) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2422 | res = validate_ntype(CHILD(tree, pos), NEWLINE); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2423 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2424 | return (res); |
| 2425 | |
| 2426 | } /* validate_eval_input() */ |
| 2427 | |
| 2428 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2429 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2430 | validate_node(tree) |
| 2431 | node *tree; |
| 2432 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2433 | int nch = 0; /* num. children on current node */ |
| 2434 | int res = 1; /* result value */ |
| 2435 | node* next = 0; /* node to process after this one */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2436 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2437 | while (res & (tree != 0)) { |
| 2438 | nch = NCH(tree); |
| 2439 | next = 0; |
| 2440 | switch (TYPE(tree)) { |
| 2441 | /* |
| 2442 | * Definition nodes. |
| 2443 | */ |
| 2444 | case funcdef: |
| 2445 | res = validate_funcdef(tree); |
| 2446 | break; |
| 2447 | case classdef: |
| 2448 | res = validate_class(tree); |
| 2449 | break; |
| 2450 | /* |
| 2451 | * "Trivial" parse tree nodes. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2452 | * (Why did I call these trivial?) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2453 | */ |
| 2454 | case stmt: |
| 2455 | res = validate_stmt(tree); |
| 2456 | break; |
| 2457 | case small_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2458 | /* |
| 2459 | * expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 2460 | * | import_stmt | global_stmt | exec_stmt | assert_stmt |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2461 | */ |
| 2462 | res = validate_small_stmt(tree); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2463 | break; |
| 2464 | case flow_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2465 | res = (validate_numnodes(tree, 1, "flow_stmt") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2466 | && ((TYPE(CHILD(tree, 0)) == break_stmt) |
| 2467 | || (TYPE(CHILD(tree, 0)) == continue_stmt) |
| 2468 | || (TYPE(CHILD(tree, 0)) == return_stmt) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2469 | || (TYPE(CHILD(tree, 0)) == raise_stmt))); |
| 2470 | if (res) |
| 2471 | next = CHILD(tree, 0); |
| 2472 | else if (nch == 1) |
| 2473 | err_string("Illegal flow_stmt type."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2474 | break; |
| 2475 | /* |
| 2476 | * Compound statements. |
| 2477 | */ |
| 2478 | case simple_stmt: |
| 2479 | res = validate_simple_stmt(tree); |
| 2480 | break; |
| 2481 | case compound_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2482 | res = validate_compound_stmt(tree); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2483 | break; |
| 2484 | /* |
| 2485 | * Fundemental statements. |
| 2486 | */ |
| 2487 | case expr_stmt: |
| 2488 | res = validate_expr_stmt(tree); |
| 2489 | break; |
| 2490 | case print_stmt: |
| 2491 | res = validate_print_stmt(tree); |
| 2492 | break; |
| 2493 | case del_stmt: |
| 2494 | res = validate_del_stmt(tree); |
| 2495 | break; |
| 2496 | case pass_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2497 | res = (validate_numnodes(tree, 1, "pass") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2498 | && validate_name(CHILD(tree, 0), "pass")); |
| 2499 | break; |
| 2500 | case break_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2501 | res = (validate_numnodes(tree, 1, "break") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2502 | && validate_name(CHILD(tree, 0), "break")); |
| 2503 | break; |
| 2504 | case continue_stmt: |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2505 | res = (validate_numnodes(tree, 1, "continue") |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2506 | && validate_name(CHILD(tree, 0), "continue")); |
| 2507 | break; |
| 2508 | case return_stmt: |
| 2509 | res = validate_return_stmt(tree); |
| 2510 | break; |
| 2511 | case raise_stmt: |
| 2512 | res = validate_raise_stmt(tree); |
| 2513 | break; |
| 2514 | case import_stmt: |
| 2515 | res = validate_import_stmt(tree); |
| 2516 | break; |
| 2517 | case global_stmt: |
| 2518 | res = validate_global_stmt(tree); |
| 2519 | break; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2520 | case exec_stmt: |
| 2521 | res = validate_exec_stmt(tree); |
| 2522 | break; |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 2523 | case assert_stmt: |
| 2524 | res = validate_assert_stmt(tree); |
| 2525 | break; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2526 | case if_stmt: |
| 2527 | res = validate_if(tree); |
| 2528 | break; |
| 2529 | case while_stmt: |
| 2530 | res = validate_while(tree); |
| 2531 | break; |
| 2532 | case for_stmt: |
| 2533 | res = validate_for(tree); |
| 2534 | break; |
| 2535 | case try_stmt: |
| 2536 | res = validate_try(tree); |
| 2537 | break; |
| 2538 | case suite: |
| 2539 | res = validate_suite(tree); |
| 2540 | break; |
| 2541 | /* |
| 2542 | * Expression nodes. |
| 2543 | */ |
| 2544 | case testlist: |
| 2545 | res = validate_testlist(tree); |
| 2546 | break; |
| 2547 | case test: |
| 2548 | res = validate_test(tree); |
| 2549 | break; |
| 2550 | case and_test: |
| 2551 | res = validate_and_test(tree); |
| 2552 | break; |
| 2553 | case not_test: |
| 2554 | res = validate_not_test(tree); |
| 2555 | break; |
| 2556 | case comparison: |
| 2557 | res = validate_comparison(tree); |
| 2558 | break; |
| 2559 | case exprlist: |
| 2560 | res = validate_exprlist(tree); |
| 2561 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2562 | case comp_op: |
| 2563 | res = validate_comp_op(tree); |
| 2564 | break; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2565 | case expr: |
| 2566 | res = validate_expr(tree); |
| 2567 | break; |
| 2568 | case xor_expr: |
| 2569 | res = validate_xor_expr(tree); |
| 2570 | break; |
| 2571 | case and_expr: |
| 2572 | res = validate_and_expr(tree); |
| 2573 | break; |
| 2574 | case shift_expr: |
| 2575 | res = validate_shift_expr(tree); |
| 2576 | break; |
| 2577 | case arith_expr: |
| 2578 | res = validate_arith_expr(tree); |
| 2579 | break; |
| 2580 | case term: |
| 2581 | res = validate_term(tree); |
| 2582 | break; |
| 2583 | case factor: |
| 2584 | res = validate_factor(tree); |
| 2585 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2586 | case power: |
| 2587 | res = validate_power(tree); |
| 2588 | break; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2589 | case atom: |
| 2590 | res = validate_atom(tree); |
| 2591 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2592 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2593 | default: |
| 2594 | /* Hopefully never reached! */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2595 | err_string("Unrecogniged node type."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2596 | res = 0; |
| 2597 | break; |
| 2598 | } |
| 2599 | tree = next; |
| 2600 | } |
| 2601 | return (res); |
| 2602 | |
| 2603 | } /* validate_node() */ |
| 2604 | |
| 2605 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2606 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2607 | validate_expr_tree(tree) |
| 2608 | node *tree; |
| 2609 | { |
| 2610 | int res = validate_eval_input(tree); |
| 2611 | |
| 2612 | if (!res && !PyErr_Occurred()) |
| 2613 | err_string("Could not validate expression tuple."); |
| 2614 | |
| 2615 | return (res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2616 | |
| 2617 | } /* validate_expr_tree() */ |
| 2618 | |
| 2619 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2620 | /* file_input: |
| 2621 | * (NEWLINE | stmt)* ENDMARKER |
| 2622 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2623 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2624 | validate_file_input(tree) |
| 2625 | node *tree; |
| 2626 | { |
| 2627 | int j = 0; |
| 2628 | int nch = NCH(tree) - 1; |
| 2629 | int res = ((nch >= 0) |
| 2630 | && validate_ntype(CHILD(tree, nch), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2631 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2632 | for ( ; res && (j < nch); ++j) { |
| 2633 | if (TYPE(CHILD(tree, j)) == stmt) |
| 2634 | res = validate_stmt(CHILD(tree, j)); |
| 2635 | else |
| 2636 | res = validate_newline(CHILD(tree, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2637 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2638 | /* This stays in to prevent any internal failues from getting to the |
| 2639 | * user. Hopefully, this won't be needed. If a user reports getting |
| 2640 | * this, we have some debugging to do. |
| 2641 | */ |
| 2642 | if (!res && !PyErr_Occurred()) |
| 2643 | err_string("VALIDATION FAILURE: report this to the maintainer!."); |
| 2644 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2645 | return (res); |
| 2646 | |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 2647 | } /* validate_file_input() */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2648 | |
| 2649 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2650 | static PyObject* |
| 2651 | pickle_constructor = NULL; |
| 2652 | |
| 2653 | |
| 2654 | static PyObject* |
| 2655 | parser__pickler(self, args) |
| 2656 | PyObject *self; |
| 2657 | PyObject *args; |
| 2658 | { |
| 2659 | PyObject *result = NULL; |
| 2660 | PyObject *ast = NULL; |
| 2661 | |
| 2662 | if (PyArg_ParseTuple(args, "O!:_pickler", &PyAST_Type, &ast)) { |
| 2663 | PyObject *newargs; |
| 2664 | PyObject *tuple; |
| 2665 | |
| 2666 | if ((newargs = Py_BuildValue("Oi", ast, 1)) == NULL) |
| 2667 | goto finally; |
| 2668 | tuple = parser_ast2tuple(NULL, newargs); |
| 2669 | if (tuple != NULL) { |
| 2670 | result = Py_BuildValue("O(O)", pickle_constructor, tuple); |
| 2671 | Py_DECREF(tuple); |
| 2672 | } |
| 2673 | Py_XDECREF(newargs); |
| 2674 | } |
| 2675 | finally: |
| 2676 | return (result); |
| 2677 | |
| 2678 | } /* parser__pickler() */ |
| 2679 | |
| 2680 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2681 | /* Functions exported by this module. Most of this should probably |
| 2682 | * be converted into an AST object with methods, but that is better |
| 2683 | * done directly in Python, allowing subclasses to be created directly. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2684 | * We'd really have to write a wrapper around it all anyway to allow |
| 2685 | * inheritance. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2686 | */ |
| 2687 | static PyMethodDef parser_functions[] = { |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2688 | {"ast2tuple", parser_ast2tuple, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2689 | "Creates a tuple-tree representation of an AST."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2690 | {"ast2list", parser_ast2list, METH_VARARGS, |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2691 | "Creates a list-tree representation of an AST."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2692 | {"compileast", parser_compileast, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2693 | "Compiles an AST object into a code object."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2694 | {"expr", parser_expr, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2695 | "Creates an AST object from an expression."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2696 | {"isexpr", parser_isexpr, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2697 | "Determines if an AST object was created from an expression."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2698 | {"issuite", parser_issuite, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2699 | "Determines if an AST object was created from a suite."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2700 | {"suite", parser_suite, METH_VARARGS, |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2701 | "Creates an AST object from a suite."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2702 | {"sequence2ast", parser_tuple2ast, METH_VARARGS, |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2703 | "Creates an AST object from a tree representation."}, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2704 | {"tuple2ast", parser_tuple2ast, METH_VARARGS, |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2705 | "Creates an AST object from a tree representation."}, |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2706 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2707 | /* private stuff: support pickle module */ |
| 2708 | {"_pickler", parser__pickler, METH_VARARGS, |
| 2709 | "Returns the pickle magic to allow ast objects to be pickled."}, |
| 2710 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2711 | {0, 0, 0} |
| 2712 | }; |
| 2713 | |
| 2714 | |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 2715 | void |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2716 | initparser() |
| 2717 | { |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 2718 | PyObject* module; |
| 2719 | PyObject* dict; |
| 2720 | |
| 2721 | PyAST_Type.ob_type = &PyType_Type; |
| 2722 | module = Py_InitModule("parser", parser_functions); |
| 2723 | dict = PyModule_GetDict(module); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2724 | |
Fred Drake | 0225a38 | 1997-10-07 19:32:00 +0000 | [diff] [blame] | 2725 | parser_error = PyErr_NewException("parser.ParserError", NULL, NULL); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2726 | |
| 2727 | if ((parser_error == 0) |
| 2728 | || (PyDict_SetItemString(dict, "ParserError", parser_error) != 0)) { |
| 2729 | /* |
| 2730 | * This is serious. |
| 2731 | */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2732 | Py_FatalError("can't define parser.ParserError"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2733 | } |
| 2734 | /* |
| 2735 | * Nice to have, but don't cry if we fail. |
| 2736 | */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2737 | Py_INCREF(&PyAST_Type); |
| 2738 | PyDict_SetItemString(dict, "ASTType", (PyObject*)&PyAST_Type); |
| 2739 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2740 | PyDict_SetItemString(dict, "__copyright__", |
| 2741 | PyString_FromString(parser_copyright_string)); |
| 2742 | PyDict_SetItemString(dict, "__doc__", |
| 2743 | PyString_FromString(parser_doc_string)); |
| 2744 | PyDict_SetItemString(dict, "__version__", |
| 2745 | PyString_FromString(parser_version_string)); |
| 2746 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 2747 | parser_method_list = PyList_New(0); |
| 2748 | if (parser_method_list != NULL) { |
| 2749 | PyMethodDef *mdef = parser_methods; |
| 2750 | |
| 2751 | while (mdef->ml_name != NULL) { |
| 2752 | PyObject *temp = PyString_FromString(mdef->ml_name); |
| 2753 | if (temp != NULL) { |
| 2754 | PyList_Append(parser_method_list, temp); |
| 2755 | Py_DECREF(temp); |
| 2756 | } |
| 2757 | ++mdef; |
| 2758 | } |
| 2759 | } |
| 2760 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2761 | /* register to support pickling */ |
| 2762 | module = PyImport_ImportModule("copy_reg"); |
| 2763 | if (module != NULL) { |
| 2764 | PyObject *func, *constructor, *pickler; |
| 2765 | |
| 2766 | func = PyObject_GetAttrString(module, "pickle"); |
| 2767 | pickle_constructor = PyDict_GetItemString(dict, "sequence2ast"); |
| 2768 | pickler = PyDict_GetItemString(dict, "_pickler"); |
| 2769 | Py_XINCREF(pickle_constructor); |
| 2770 | if ((func != NULL) && (pickle_constructor != NULL) |
| 2771 | && (pickler != NULL)) { |
| 2772 | PyObject *res; |
| 2773 | |
| 2774 | res = PyObject_CallFunction( |
| 2775 | func, "OOO", &PyAST_Type, pickler, pickle_constructor); |
| 2776 | Py_XDECREF(res); |
| 2777 | } |
| 2778 | Py_XDECREF(func); |
| 2779 | Py_DECREF(module); |
| 2780 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2781 | } /* initparser() */ |