Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1 | /* parsermodule.c |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 3 | * Copyright 1995-1996 by Fred L. Drake, Jr. and Virginia Polytechnic |
| 4 | * Institute and State University, Blacksburg, Virginia, USA. |
| 5 | * Portions copyright 1991-1995 by Stichting Mathematisch Centrum, |
| 6 | * Amsterdam, The Netherlands. Copying is permitted under the terms |
| 7 | * associated with the main Python distribution, with the additional |
| 8 | * restriction that this additional notice be included and maintained |
| 9 | * on all distributed copies. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 10 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 11 | * This module serves to replace the original parser module written |
| 12 | * by Guido. The functionality is not matched precisely, but the |
| 13 | * original may be implemented on top of this. This is desirable |
| 14 | * since the source of the text to be parsed is now divorced from |
| 15 | * this interface. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 16 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 17 | * Unlike the prior interface, the ability to give a parse tree |
| 18 | * produced by Python code as a tuple to the compiler is enabled by |
| 19 | * this module. See the documentation for more details. |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 20 | * |
| 21 | * I've added some annotations that help with the lint code-checking |
| 22 | * program, but they're not complete by a long shot. The real errors |
| 23 | * that lint detects are gone, but there are still warnings with |
| 24 | * Py_[X]DECREF() and Py_[X]INCREF() macros. The lint annotations |
| 25 | * look like "NOTE(...)". |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 26 | */ |
| 27 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 28 | #include "Python.h" /* general Python API */ |
| 29 | #include "graminit.h" /* symbols defined in the grammar */ |
| 30 | #include "node.h" /* internal parser structure */ |
| 31 | #include "token.h" /* token definitions */ |
| 32 | /* ISTERMINAL() / ISNONTERMINAL() */ |
| 33 | #include "compile.h" /* PyNode_Compile() */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 34 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 35 | #ifdef lint |
| 36 | #include <note.h> |
| 37 | #else |
| 38 | #define NOTE(x) |
| 39 | #endif |
| 40 | |
Guido van Rossum | 19efc5f | 1998-04-28 16:10:19 +0000 | [diff] [blame] | 41 | #ifdef macintosh |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 42 | char *strdup(char *); |
Guido van Rossum | 19efc5f | 1998-04-28 16:10:19 +0000 | [diff] [blame] | 43 | #endif |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 44 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 45 | /* String constants used to initialize module attributes. |
| 46 | * |
| 47 | */ |
| 48 | static char* |
| 49 | parser_copyright_string |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 50 | = "Copyright 1995-1996 by Virginia Polytechnic Institute & State\n\ |
| 51 | University, Blacksburg, Virginia, USA, and Fred L. Drake, Jr., Reston,\n\ |
| 52 | Virginia, USA. Portions copyright 1991-1995 by Stichting Mathematisch\n\ |
| 53 | Centrum, Amsterdam, The Netherlands."; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 54 | |
| 55 | |
| 56 | static char* |
| 57 | parser_doc_string |
| 58 | = "This is an interface to Python's internal parser."; |
| 59 | |
| 60 | static char* |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 61 | parser_version_string = "0.4"; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 62 | |
| 63 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 64 | typedef PyObject* (*SeqMaker) (int length); |
| 65 | typedef int (*SeqInserter) (PyObject* sequence, |
| 66 | int index, |
| 67 | PyObject* element); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 68 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 69 | /* The function below is copyrigthed by Stichting Mathematisch Centrum. The |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 70 | * original copyright statement is included below, and continues to apply |
| 71 | * in full to the function immediately following. All other material is |
| 72 | * original, copyrighted by Fred L. Drake, Jr. and Virginia Polytechnic |
| 73 | * Institute and State University. Changes were made to comply with the |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 74 | * new naming conventions. Added arguments to provide support for creating |
| 75 | * lists as well as tuples, and optionally including the line numbers. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 76 | */ |
| 77 | |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 78 | /*********************************************************** |
Guido van Rossum | 524b588 | 1995-01-04 19:10:35 +0000 | [diff] [blame] | 79 | Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam, |
| 80 | The Netherlands. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 81 | |
| 82 | All Rights Reserved |
| 83 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 84 | Permission to use, copy, modify, and distribute this software and its |
| 85 | documentation for any purpose and without fee is hereby granted, |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 86 | 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] | 87 | both that copyright notice and this permission notice appear in |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 88 | supporting documentation, and that the names of Stichting Mathematisch |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 89 | Centrum or CWI or Corporation for National Research Initiatives or |
| 90 | CNRI not be used in advertising or publicity pertaining to |
| 91 | distribution of the software without specific, written prior |
| 92 | permission. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 93 | |
Guido van Rossum | d266eb4 | 1996-10-25 14:44:06 +0000 | [diff] [blame] | 94 | While CWI is the initial source for this software, a modified version |
| 95 | is made available by the Corporation for National Research Initiatives |
| 96 | (CNRI) at the Internet address ftp://ftp.python.org. |
| 97 | |
| 98 | STICHTING MATHEMATISCH CENTRUM AND CNRI DISCLAIM ALL WARRANTIES WITH |
| 99 | REGARD TO THIS SOFTWARE, INCLUDING ALL IMPLIED WARRANTIES OF |
| 100 | MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL STICHTING MATHEMATISCH |
| 101 | CENTRUM OR CNRI BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL |
| 102 | DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR |
| 103 | PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER |
| 104 | TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR |
| 105 | PERFORMANCE OF THIS SOFTWARE. |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 106 | |
| 107 | ******************************************************************/ |
| 108 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 109 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 110 | node2tuple(node *n, /* node to convert */ |
| 111 | SeqMaker mkseq, /* create sequence */ |
| 112 | SeqInserter addelem, /* func. to add elem. in seq. */ |
| 113 | int lineno) /* include line numbers? */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 114 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 115 | if (n == NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 116 | Py_INCREF(Py_None); |
| 117 | return (Py_None); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 118 | } |
| 119 | if (ISNONTERMINAL(TYPE(n))) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 120 | int i; |
| 121 | PyObject *v; |
| 122 | PyObject *w; |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 123 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 124 | v = mkseq(1 + NCH(n)); |
| 125 | if (v == NULL) |
| 126 | return (v); |
| 127 | w = PyInt_FromLong(TYPE(n)); |
| 128 | if (w == NULL) { |
| 129 | Py_DECREF(v); |
| 130 | return ((PyObject*) NULL); |
| 131 | } |
| 132 | (void) addelem(v, 0, w); |
| 133 | for (i = 0; i < NCH(n); i++) { |
| 134 | w = node2tuple(CHILD(n, i), mkseq, addelem, lineno); |
| 135 | if (w == NULL) { |
| 136 | Py_DECREF(v); |
| 137 | return ((PyObject*) NULL); |
| 138 | } |
| 139 | (void) addelem(v, i+1, w); |
| 140 | } |
| 141 | return (v); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 142 | } |
| 143 | else if (ISTERMINAL(TYPE(n))) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 144 | PyObject *result = mkseq(2 + lineno); |
| 145 | if (result != NULL) { |
| 146 | (void) addelem(result, 0, PyInt_FromLong(TYPE(n))); |
| 147 | (void) addelem(result, 1, PyString_FromString(STR(n))); |
| 148 | if (lineno == 1) |
| 149 | (void) addelem(result, 2, PyInt_FromLong(n->n_lineno)); |
| 150 | } |
| 151 | return (result); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 152 | } |
| 153 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 154 | PyErr_SetString(PyExc_SystemError, |
| 155 | "unrecognized parse tree node type"); |
| 156 | return ((PyObject*) NULL); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 157 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 158 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 159 | /* |
| 160 | * End of material copyrighted by Stichting Mathematisch Centrum. |
| 161 | */ |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 162 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 163 | |
| 164 | |
| 165 | /* There are two types of intermediate objects we're interested in: |
| 166 | * 'eval' and 'exec' types. These constants can be used in the ast_type |
| 167 | * field of the object type to identify which any given object represents. |
| 168 | * These should probably go in an external header to allow other extensions |
| 169 | * to use them, but then, we really should be using C++ too. ;-) |
| 170 | * |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 171 | * The PyAST_FRAGMENT type is not currently supported. Maybe not useful? |
| 172 | * Haven't decided yet. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 173 | */ |
| 174 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 175 | #define PyAST_EXPR 1 |
| 176 | #define PyAST_SUITE 2 |
| 177 | #define PyAST_FRAGMENT 3 |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 178 | |
| 179 | |
| 180 | /* These are the internal objects and definitions required to implement the |
| 181 | * AST type. Most of the internal names are more reminiscent of the 'old' |
| 182 | * naming style, but the code uses the new naming convention. |
| 183 | */ |
| 184 | |
| 185 | static PyObject* |
| 186 | parser_error = 0; |
| 187 | |
| 188 | |
| 189 | typedef struct _PyAST_Object { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 190 | PyObject_HEAD /* standard object header */ |
| 191 | node* ast_node; /* the node* returned by the parser */ |
| 192 | int ast_type; /* EXPR or SUITE ? */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 193 | } PyAST_Object; |
| 194 | |
| 195 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 196 | staticforward void |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 197 | parser_free(PyAST_Object *ast); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 198 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 199 | staticforward int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 200 | parser_compare(PyAST_Object *left, PyAST_Object *right); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 201 | |
| 202 | staticforward PyObject * |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 203 | parser_getattr(PyObject *self, char *name); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 204 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 205 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 206 | static |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 207 | PyTypeObject PyAST_Type = { |
Guido van Rossum | 3c8c598 | 1998-05-29 02:58:20 +0000 | [diff] [blame] | 208 | PyObject_HEAD_INIT(NULL) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 209 | 0, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 210 | "ast", /* tp_name */ |
| 211 | (int) sizeof(PyAST_Object), /* tp_basicsize */ |
| 212 | 0, /* tp_itemsize */ |
| 213 | (destructor)parser_free, /* tp_dealloc */ |
| 214 | 0, /* tp_print */ |
| 215 | parser_getattr, /* tp_getattr */ |
| 216 | 0, /* tp_setattr */ |
| 217 | (cmpfunc)parser_compare, /* tp_compare */ |
| 218 | 0, /* tp_repr */ |
| 219 | 0, /* tp_as_number */ |
| 220 | 0, /* tp_as_sequence */ |
| 221 | 0, /* tp_as_mapping */ |
| 222 | 0, /* tp_hash */ |
| 223 | 0, /* tp_call */ |
| 224 | 0, /* tp_str */ |
| 225 | 0, /* tp_getattro */ |
| 226 | 0, /* tp_setattro */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 227 | |
| 228 | /* Functions to access object as input/output buffer */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 229 | 0, /* tp_as_buffer */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 230 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 231 | Py_TPFLAGS_DEFAULT, /* tp_flags */ |
Fred Drake | 69b9ae4 | 1997-05-23 04:04:17 +0000 | [diff] [blame] | 232 | |
| 233 | /* __doc__ */ |
| 234 | "Intermediate representation of a Python parse tree." |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 235 | }; /* PyAST_Type */ |
| 236 | |
| 237 | |
| 238 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 239 | parser_compare_nodes(node *left, node *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 240 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 241 | int j; |
Guido van Rossum | 52f2c05 | 1993-11-10 12:53:24 +0000 | [diff] [blame] | 242 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 243 | if (TYPE(left) < TYPE(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 244 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 245 | |
| 246 | if (TYPE(right) < TYPE(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 247 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 248 | |
| 249 | if (ISTERMINAL(TYPE(left))) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 250 | return (strcmp(STR(left), STR(right))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 251 | |
| 252 | if (NCH(left) < NCH(right)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 253 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 254 | |
| 255 | if (NCH(right) < NCH(left)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 256 | return (1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 257 | |
| 258 | for (j = 0; j < NCH(left); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 259 | int v = parser_compare_nodes(CHILD(left, j), CHILD(right, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 260 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 261 | if (v != 0) |
| 262 | return (v); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 263 | } |
| 264 | return (0); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 265 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 266 | |
| 267 | |
| 268 | /* int parser_compare(PyAST_Object* left, PyAST_Object* right) |
| 269 | * |
| 270 | * Comparison function used by the Python operators ==, !=, <, >, <=, >= |
| 271 | * This really just wraps a call to parser_compare_nodes() with some easy |
| 272 | * checks and protection code. |
| 273 | * |
| 274 | */ |
| 275 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 276 | parser_compare(PyAST_Object *left, PyAST_Object *right) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 277 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 278 | if (left == right) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 279 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 280 | |
| 281 | if ((left == 0) || (right == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 282 | return (-1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 283 | |
| 284 | return (parser_compare_nodes(left->ast_node, right->ast_node)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 285 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 286 | |
| 287 | |
| 288 | /* parser_newastobject(node* ast) |
| 289 | * |
| 290 | * Allocates a new Python object representing an AST. This is simply the |
| 291 | * 'wrapper' object that holds a node* and allows it to be passed around in |
| 292 | * Python code. |
| 293 | * |
| 294 | */ |
| 295 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 296 | parser_newastobject(node *ast, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 297 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 298 | PyAST_Object* o = PyObject_NEW(PyAST_Object, &PyAST_Type); |
| 299 | |
| 300 | if (o != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 301 | o->ast_node = ast; |
| 302 | o->ast_type = type; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 303 | } |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 304 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 305 | PyNode_Free(ast); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 306 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 307 | return ((PyObject*)o); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 308 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 309 | |
| 310 | |
| 311 | /* void parser_free(PyAST_Object* ast) |
| 312 | * |
| 313 | * This is called by a del statement that reduces the reference count to 0. |
| 314 | * |
| 315 | */ |
| 316 | static void |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 317 | parser_free(PyAST_Object *ast) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 318 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 319 | PyNode_Free(ast->ast_node); |
| 320 | PyMem_DEL(ast); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 321 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 322 | |
| 323 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 324 | /* parser_ast2tuple(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 325 | * |
| 326 | * This provides conversion from a node* to a tuple object that can be |
| 327 | * returned to the Python-level caller. The AST object is not modified. |
| 328 | * |
| 329 | */ |
| 330 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 331 | parser_ast2tuple(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 332 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 333 | PyObject *line_option = 0; |
| 334 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 335 | int ok; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 336 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 337 | static char *keywords[] = {"ast", "line_info", NULL}; |
| 338 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 339 | if (self == NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 340 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|O:ast2tuple", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 341 | &PyAST_Type, &self, &line_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 342 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 343 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 344 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|O:totuple", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 345 | &line_option); |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 346 | if (ok != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 347 | int lineno = 0; |
| 348 | if (line_option != NULL) { |
| 349 | lineno = (PyObject_IsTrue(line_option) != 0) ? 1 : 0; |
| 350 | } |
| 351 | /* |
| 352 | * Convert AST into a tuple representation. Use Guido's function, |
| 353 | * since it's known to work already. |
| 354 | */ |
| 355 | res = node2tuple(((PyAST_Object*)self)->ast_node, |
| 356 | PyTuple_New, PyTuple_SetItem, lineno); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 357 | } |
| 358 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 359 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 360 | |
| 361 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 362 | /* parser_ast2list(PyObject* self, PyObject* args, PyObject* kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 363 | * |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 364 | * This provides conversion from a node* to a list object that can be |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 365 | * returned to the Python-level caller. The AST object is not modified. |
| 366 | * |
| 367 | */ |
| 368 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 369 | parser_ast2list(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 370 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 371 | PyObject *line_option = 0; |
| 372 | PyObject *res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 373 | int ok; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 374 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 375 | static char *keywords[] = {"ast", "line_info", NULL}; |
| 376 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 377 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 378 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|O:ast2list", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 379 | &PyAST_Type, &self, &line_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 380 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 381 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|O:tolist", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 382 | &line_option); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 383 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 384 | int lineno = 0; |
| 385 | if (line_option != 0) { |
| 386 | lineno = PyObject_IsTrue(line_option) ? 1 : 0; |
| 387 | } |
| 388 | /* |
| 389 | * Convert AST into a tuple representation. Use Guido's function, |
| 390 | * since it's known to work already. |
| 391 | */ |
| 392 | res = node2tuple(self->ast_node, |
| 393 | PyList_New, PyList_SetItem, lineno); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 394 | } |
| 395 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 396 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 397 | |
| 398 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 399 | /* parser_compileast(PyObject* self, PyObject* args) |
| 400 | * |
| 401 | * This function creates code objects from the parse tree represented by |
| 402 | * the passed-in data object. An optional file name is passed in as well. |
| 403 | * |
| 404 | */ |
| 405 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 406 | parser_compileast(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 407 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 408 | PyObject* res = 0; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 409 | char* str = "<ast>"; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 410 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 411 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 412 | static char *keywords[] = {"ast", "filename", NULL}; |
| 413 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 414 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 415 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!|s:compileast", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 416 | &PyAST_Type, &self, &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 417 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 418 | ok = PyArg_ParseTupleAndKeywords(args, kw, "|s:compile", &keywords[1], |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 419 | &str); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 420 | |
| 421 | if (ok) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 422 | res = (PyObject *)PyNode_Compile(self->ast_node, str); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 423 | |
| 424 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 425 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 426 | |
| 427 | |
| 428 | /* PyObject* parser_isexpr(PyObject* self, PyObject* args) |
| 429 | * PyObject* parser_issuite(PyObject* self, PyObject* args) |
| 430 | * |
| 431 | * Checks the passed-in AST object to determine if it is an expression or |
| 432 | * a statement suite, respectively. The return is a Python truth value. |
| 433 | * |
| 434 | */ |
| 435 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 436 | parser_isexpr(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 437 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 438 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 439 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 440 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 441 | static char *keywords[] = {"ast", NULL}; |
| 442 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 443 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 444 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:isexpr", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 445 | &PyAST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 446 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 447 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":isexpr", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 448 | |
| 449 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 450 | /* Check to see if the AST represents an expression or not. */ |
| 451 | res = (self->ast_type == PyAST_EXPR) ? Py_True : Py_False; |
| 452 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 453 | } |
| 454 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 455 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 456 | |
| 457 | |
| 458 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 459 | parser_issuite(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 460 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 461 | PyObject* res = 0; |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 462 | int ok; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 463 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 464 | static char *keywords[] = {"ast", NULL}; |
| 465 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 466 | if (self == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 467 | ok = PyArg_ParseTupleAndKeywords(args, kw, "O!:issuite", keywords, |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 468 | &PyAST_Type, &self); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 469 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 470 | ok = PyArg_ParseTupleAndKeywords(args, kw, ":issuite", &keywords[1]); |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 471 | |
| 472 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 473 | /* Check to see if the AST represents an expression or not. */ |
| 474 | res = (self->ast_type == PyAST_EXPR) ? Py_False : Py_True; |
| 475 | Py_INCREF(res); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 476 | } |
| 477 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 478 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 479 | |
| 480 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 481 | #define PUBLIC_METHOD_TYPE (METH_VARARGS|METH_KEYWORDS) |
| 482 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 483 | static PyMethodDef |
| 484 | parser_methods[] = { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 485 | {"compile", (PyCFunction)parser_compileast, PUBLIC_METHOD_TYPE, |
| 486 | "Compile this AST object into a code object."}, |
| 487 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
| 488 | "Determines if this AST object was created from an expression."}, |
| 489 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
| 490 | "Determines if this AST object was created from a suite."}, |
| 491 | {"tolist", (PyCFunction)parser_ast2list, PUBLIC_METHOD_TYPE, |
| 492 | "Creates a list-tree representation of this AST."}, |
| 493 | {"totuple", (PyCFunction)parser_ast2tuple, PUBLIC_METHOD_TYPE, |
| 494 | "Creates a tuple-tree representation of this AST."}, |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 495 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 496 | {NULL, NULL, 0, NULL} |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 497 | }; |
| 498 | |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 499 | |
| 500 | static PyObject* |
| 501 | parser_getattr(self, name) |
| 502 | PyObject *self; |
| 503 | char *name; |
| 504 | { |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 505 | return (Py_FindMethod(parser_methods, self, name)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 506 | } |
Fred Drake | 503d8d6 | 1998-04-13 18:45:18 +0000 | [diff] [blame] | 507 | |
| 508 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 509 | /* err_string(char* message) |
| 510 | * |
| 511 | * Sets the error string for an exception of type ParserError. |
| 512 | * |
| 513 | */ |
| 514 | static void |
| 515 | err_string(message) |
| 516 | char *message; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 517 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 518 | PyErr_SetString(parser_error, message); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 519 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 520 | |
| 521 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 522 | /* PyObject* parser_do_parse(PyObject* args, int type) |
| 523 | * |
| 524 | * Internal function to actually execute the parse and return the result if |
| 525 | * successful, or set an exception if not. |
| 526 | * |
| 527 | */ |
| 528 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 529 | parser_do_parse(PyObject *args, PyObject *kw, char *argspec, int type) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 530 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 531 | char* string = 0; |
| 532 | PyObject* res = 0; |
| 533 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 534 | static char *keywords[] = {"source", NULL}; |
| 535 | |
| 536 | if (PyArg_ParseTupleAndKeywords(args, kw, argspec, keywords, &string)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 537 | node* n = PyParser_SimpleParseString(string, |
| 538 | (type == PyAST_EXPR) |
| 539 | ? eval_input : file_input); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 540 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 541 | if (n != 0) |
| 542 | res = parser_newastobject(n, type); |
| 543 | else |
| 544 | err_string("Could not parse string."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 545 | } |
| 546 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 547 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 548 | |
| 549 | |
| 550 | /* PyObject* parser_expr(PyObject* self, PyObject* args) |
| 551 | * PyObject* parser_suite(PyObject* self, PyObject* args) |
| 552 | * |
| 553 | * External interfaces to the parser itself. Which is called determines if |
| 554 | * the parser attempts to recognize an expression ('eval' form) or statement |
| 555 | * suite ('exec' form). The real work is done by parser_do_parse() above. |
| 556 | * |
| 557 | */ |
| 558 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 559 | parser_expr(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 560 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 561 | NOTE(ARGUNUSED(self)) |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 562 | return (parser_do_parse(args, kw, "s:expr", PyAST_EXPR)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 563 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 564 | |
| 565 | |
| 566 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 567 | parser_suite(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 568 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 569 | NOTE(ARGUNUSED(self)) |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 570 | return (parser_do_parse(args, kw, "s:suite", PyAST_SUITE)); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 571 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 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 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 592 | staticforward node* build_node_tree(PyObject *tuple); |
| 593 | staticforward int validate_expr_tree(node *tree); |
| 594 | staticforward int validate_file_input(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* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 611 | parser_tuple2ast(PyAST_Object *self, PyObject *args, PyObject *kw) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 612 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 613 | NOTE(ARGUNUSED(self)) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 614 | PyObject *ast = 0; |
| 615 | PyObject *tuple = 0; |
| 616 | PyObject *temp = 0; |
| 617 | int ok; |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 618 | int start_sym = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 619 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 620 | static char *keywords[] = {"sequence", NULL}; |
| 621 | |
| 622 | if (!PyArg_ParseTupleAndKeywords(args, kw, "O:tuple2ast", keywords, |
| 623 | &tuple)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 624 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 625 | if (!PySequence_Check(tuple)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 626 | PyErr_SetString(PyExc_ValueError, |
| 627 | "tuple2ast() requires a single sequence argument"); |
| 628 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 629 | } |
| 630 | /* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 631 | * This mess of tests is written this way so we can use the abstract |
| 632 | * object interface (AOI). Unfortunately, the AOI increments reference |
| 633 | * counts, which requires that we store a pointer to retrieved object |
| 634 | * so we can DECREF it after the check. But we really should accept |
| 635 | * lists as well as tuples at the very least. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 636 | */ |
| 637 | ok = PyObject_Length(tuple) >= 2; |
| 638 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 639 | temp = PySequence_GetItem(tuple, 0); |
| 640 | ok = (temp != NULL) && PyInt_Check(temp); |
| 641 | if (ok) |
| 642 | /* this is used after the initial checks: */ |
| 643 | start_sym = PyInt_AS_LONG(temp); |
| 644 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 645 | } |
| 646 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 647 | temp = PySequence_GetItem(tuple, 1); |
| 648 | ok = (temp != NULL) && PySequence_Check(temp); |
| 649 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 650 | } |
| 651 | if (ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 652 | temp = PySequence_GetItem(tuple, 1); |
| 653 | ok = (temp != NULL) && PyObject_Length(temp) >= 2; |
| 654 | if (ok) { |
| 655 | PyObject *temp2 = PySequence_GetItem(temp, 0); |
| 656 | if (temp2 != NULL) { |
| 657 | ok = PyInt_Check(temp2); |
| 658 | Py_DECREF(temp2); |
| 659 | } |
| 660 | } |
| 661 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 662 | } |
| 663 | /* If we've failed at some point, get out of here. */ |
| 664 | if (!ok) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 665 | err_string("malformed sequence for tuple2ast()"); |
| 666 | return (0); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 667 | } |
| 668 | /* |
| 669 | * This might be a valid parse tree, but let's do a quick check |
| 670 | * before we jump the gun. |
| 671 | */ |
| 672 | if (start_sym == eval_input) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 673 | /* Might be an eval form. */ |
| 674 | node* expression = build_node_tree(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 675 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 676 | if ((expression != 0) && validate_expr_tree(expression)) |
| 677 | ast = parser_newastobject(expression, PyAST_EXPR); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 678 | } |
| 679 | else if (start_sym == file_input) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 680 | /* This looks like an exec form so far. */ |
| 681 | node* suite_tree = build_node_tree(tuple); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 682 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 683 | if ((suite_tree != 0) && validate_file_input(suite_tree)) |
| 684 | ast = parser_newastobject(suite_tree, PyAST_SUITE); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 685 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 686 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 687 | /* This is a fragment, and is not yet supported. Maybe they |
| 688 | * will be if I find a use for them. |
| 689 | */ |
| 690 | err_string("Fragmentary parse trees not supported."); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 691 | |
| 692 | /* Make sure we throw an exception on all errors. We should never |
| 693 | * get this, but we'd do well to be sure something is done. |
| 694 | */ |
| 695 | if ((ast == 0) && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 696 | err_string("Unspecified ast error occurred."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 697 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 698 | return (ast); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 699 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 700 | |
| 701 | |
| 702 | /* int check_terminal_tuple() |
| 703 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 704 | * Check a tuple to determine that it is indeed a valid terminal |
| 705 | * node. The node is known to be required as a terminal, so we throw |
| 706 | * an exception if there is a failure. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 707 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 708 | * The format of an acceptable terminal tuple is "(is[i])": the fact |
| 709 | * that elem is a tuple and the integer is a valid terminal symbol |
| 710 | * has been established before this function is called. We must |
| 711 | * check the length of the tuple and the type of the second element |
| 712 | * and optional third element. We do *NOT* check the actual text of |
| 713 | * the string element, which we could do in many cases. This is done |
| 714 | * by the validate_*() functions which operate on the internal |
| 715 | * representation. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 716 | */ |
| 717 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 718 | check_terminal_tuple(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)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 725 | PyObject *temp = PySequence_GetItem(elem, 1); |
| 726 | res = PyString_Check(temp); |
| 727 | str = "Illegal terminal symbol; expected a string."; |
| 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); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 735 | } |
| 736 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 737 | res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 738 | } |
| 739 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 740 | elem = Py_BuildValue("(os)", elem, str); |
| 741 | PyErr_SetObject(parser_error, elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 742 | } |
| 743 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 744 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 745 | |
| 746 | |
| 747 | /* node* build_node_children() |
| 748 | * |
| 749 | * Iterate across the children of the current non-terminal node and build |
| 750 | * their structures. If successful, return the root of this portion of |
| 751 | * the tree, otherwise, 0. Any required exception will be specified already, |
| 752 | * and no memory will have been deallocated. |
| 753 | * |
| 754 | */ |
| 755 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 756 | build_node_children(PyObject *tuple, node *root, int *line_num) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 757 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 758 | int len = PyObject_Length(tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 759 | int i; |
| 760 | |
| 761 | for (i = 1; i < len; ++i) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 762 | /* elem must always be a tuple, however simple */ |
| 763 | PyObject* elem = PySequence_GetItem(tuple, i); |
| 764 | int ok = elem != NULL; |
| 765 | long type = 0; |
| 766 | char *strn = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 767 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 768 | if (ok) |
| 769 | ok = PySequence_Check(elem); |
| 770 | if (ok) { |
| 771 | PyObject *temp = PySequence_GetItem(elem, 0); |
| 772 | if (temp == NULL) |
| 773 | ok = 0; |
| 774 | else { |
| 775 | ok = PyInt_Check(temp); |
| 776 | if (ok) |
| 777 | type = PyInt_AS_LONG(temp); |
| 778 | Py_DECREF(temp); |
| 779 | } |
| 780 | } |
| 781 | if (!ok) { |
| 782 | PyErr_SetObject(parser_error, |
| 783 | Py_BuildValue("(os)", elem, |
| 784 | "Illegal node construct.")); |
| 785 | Py_XDECREF(elem); |
| 786 | return (0); |
| 787 | } |
| 788 | if (ISTERMINAL(type)) { |
| 789 | if (check_terminal_tuple(elem)) { |
| 790 | PyObject *temp = PySequence_GetItem(elem, 1); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 791 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 792 | /* check_terminal_tuple() already verified it's a string */ |
| 793 | strn = (char *)malloc(PyString_GET_SIZE(temp) + 1); |
| 794 | if (strn != NULL) |
| 795 | (void) strcpy(strn, PyString_AS_STRING(temp)); |
| 796 | Py_XDECREF(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 797 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 798 | if (PyObject_Length(elem) == 3) { |
| 799 | PyObject* temp = PySequence_GetItem(elem, 2); |
| 800 | *line_num = PyInt_AsLong(temp); |
| 801 | Py_DECREF(temp); |
| 802 | } |
| 803 | } |
| 804 | else { |
| 805 | Py_XDECREF(elem); |
| 806 | return (0); |
| 807 | } |
| 808 | } |
| 809 | else if (!ISNONTERMINAL(type)) { |
| 810 | /* |
| 811 | * It has to be one or the other; this is an error. |
| 812 | * Throw an exception. |
| 813 | */ |
| 814 | PyErr_SetObject(parser_error, |
| 815 | Py_BuildValue("(os)", elem, |
| 816 | "Unknown node type.")); |
| 817 | Py_XDECREF(elem); |
| 818 | return (0); |
| 819 | } |
| 820 | PyNode_AddChild(root, type, strn, *line_num); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 821 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 822 | if (ISNONTERMINAL(type)) { |
| 823 | node* new_child = CHILD(root, i - 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 824 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 825 | if (new_child != build_node_children(elem, new_child, line_num)) { |
| 826 | Py_XDECREF(elem); |
| 827 | return (0); |
| 828 | } |
| 829 | } |
| 830 | else if (type == NEWLINE) { /* It's true: we increment the */ |
| 831 | ++(*line_num); /* line number *after* the newline! */ |
| 832 | } |
| 833 | Py_XDECREF(elem); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 834 | } |
| 835 | return (root); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 836 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 837 | |
| 838 | |
| 839 | static node* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 840 | build_node_tree(PyObject *tuple) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 841 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 842 | node* res = 0; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 843 | PyObject *temp = PySequence_GetItem(tuple, 0); |
| 844 | long num = -1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 845 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 846 | if (temp != NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 847 | num = PyInt_AsLong(temp); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 848 | Py_XDECREF(temp); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 849 | if (ISTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 850 | /* |
| 851 | * The tuple is simple, but it doesn't start with a start symbol. |
| 852 | * Throw an exception now and be done with it. |
| 853 | */ |
| 854 | tuple = Py_BuildValue("(os)", tuple, |
| 855 | "Illegal ast tuple; cannot start with terminal symbol."); |
| 856 | PyErr_SetObject(parser_error, tuple); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 857 | } |
| 858 | else if (ISNONTERMINAL(num)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 859 | /* |
| 860 | * Not efficient, but that can be handled later. |
| 861 | */ |
| 862 | int line_num = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 863 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 864 | res = PyNode_New(num); |
| 865 | if (res != build_node_children(tuple, res, &line_num)) { |
| 866 | PyNode_Free(res); |
| 867 | res = 0; |
| 868 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 869 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 870 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 871 | /* The tuple is illegal -- if the number is neither TERMINAL nor |
| 872 | * NONTERMINAL, we can't use it. |
| 873 | */ |
| 874 | PyErr_SetObject(parser_error, |
| 875 | Py_BuildValue("(os)", tuple, |
| 876 | "Illegal component tuple.")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 877 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 878 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 879 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 880 | |
| 881 | |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 882 | #ifdef HAVE_OLD_CPP |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 883 | #define VALIDATER(n) static int validate_/**/n(node *tree) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 884 | #else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 885 | #define VALIDATER(n) static int validate_##n(node *tree) |
Guido van Rossum | 360a934 | 1996-08-21 19:04:10 +0000 | [diff] [blame] | 886 | #endif |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 887 | |
| 888 | |
| 889 | /* |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 890 | * Validation routines used within the validation section: |
| 891 | */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 892 | staticforward int validate_terminal(node *terminal, int type, char *string); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 893 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 894 | #define validate_ampersand(ch) validate_terminal(ch, AMPER, "&") |
| 895 | #define validate_circumflex(ch) validate_terminal(ch, CIRCUMFLEX, "^") |
| 896 | #define validate_colon(ch) validate_terminal(ch, COLON, ":") |
| 897 | #define validate_comma(ch) validate_terminal(ch, COMMA, ",") |
| 898 | #define validate_dedent(ch) validate_terminal(ch, DEDENT, "") |
| 899 | #define validate_equal(ch) validate_terminal(ch, EQUAL, "=") |
| 900 | #define validate_indent(ch) validate_terminal(ch, INDENT, (char*)NULL) |
| 901 | #define validate_lparen(ch) validate_terminal(ch, LPAR, "(") |
| 902 | #define validate_newline(ch) validate_terminal(ch, NEWLINE, (char*)NULL) |
| 903 | #define validate_rparen(ch) validate_terminal(ch, RPAR, ")") |
| 904 | #define validate_semi(ch) validate_terminal(ch, SEMI, ";") |
| 905 | #define validate_star(ch) validate_terminal(ch, STAR, "*") |
| 906 | #define validate_vbar(ch) validate_terminal(ch, VBAR, "|") |
| 907 | #define validate_doublestar(ch) validate_terminal(ch, DOUBLESTAR, "**") |
| 908 | #define validate_dot(ch) validate_terminal(ch, DOT, ".") |
| 909 | #define validate_name(ch, str) validate_terminal(ch, NAME, str) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 910 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 911 | VALIDATER(node); VALIDATER(small_stmt); |
| 912 | VALIDATER(class); VALIDATER(node); |
| 913 | VALIDATER(parameters); VALIDATER(suite); |
| 914 | VALIDATER(testlist); VALIDATER(varargslist); |
| 915 | VALIDATER(fpdef); VALIDATER(fplist); |
| 916 | VALIDATER(stmt); VALIDATER(simple_stmt); |
| 917 | VALIDATER(expr_stmt); VALIDATER(power); |
| 918 | VALIDATER(print_stmt); VALIDATER(del_stmt); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 919 | VALIDATER(return_stmt); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 920 | VALIDATER(raise_stmt); VALIDATER(import_stmt); |
Guido van Rossum | 2a28846 | 1996-08-21 21:55:43 +0000 | [diff] [blame] | 921 | VALIDATER(global_stmt); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 922 | VALIDATER(assert_stmt); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 923 | VALIDATER(exec_stmt); VALIDATER(compound_stmt); |
| 924 | VALIDATER(while); VALIDATER(for); |
| 925 | VALIDATER(try); VALIDATER(except_clause); |
| 926 | VALIDATER(test); VALIDATER(and_test); |
| 927 | VALIDATER(not_test); VALIDATER(comparison); |
| 928 | VALIDATER(comp_op); VALIDATER(expr); |
| 929 | VALIDATER(xor_expr); VALIDATER(and_expr); |
| 930 | VALIDATER(shift_expr); VALIDATER(arith_expr); |
| 931 | VALIDATER(term); VALIDATER(factor); |
| 932 | VALIDATER(atom); VALIDATER(lambdef); |
| 933 | VALIDATER(trailer); VALIDATER(subscript); |
| 934 | VALIDATER(subscriptlist); VALIDATER(sliceop); |
| 935 | VALIDATER(exprlist); VALIDATER(dictmaker); |
| 936 | VALIDATER(arglist); VALIDATER(argument); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 937 | |
| 938 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 939 | #define is_even(n) (((n) & 1) == 0) |
| 940 | #define is_odd(n) (((n) & 1) == 1) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 941 | |
| 942 | |
| 943 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 944 | validate_ntype(node *n, int t) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 945 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 946 | int res = (TYPE(n) == t); |
| 947 | |
| 948 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 949 | char buffer[128]; |
| 950 | (void) sprintf(buffer, "Expected node type %d, got %d.", t, TYPE(n)); |
| 951 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 952 | } |
| 953 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 954 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 955 | |
| 956 | |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 957 | /* Verifies that the number of child nodes is exactly 'num', raising |
| 958 | * an exception if it isn't. The exception message does not indicate |
| 959 | * the exact number of nodes, allowing this to be used to raise the |
| 960 | * "right" exception when the wrong number of nodes is present in a |
| 961 | * specific variant of a statement's syntax. This is commonly used |
| 962 | * in that fashion. |
| 963 | */ |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 964 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 965 | validate_numnodes(node *n, int num, const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 966 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 967 | if (NCH(n) != num) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 968 | char buff[60]; |
| 969 | (void) sprintf(buff, "Illegal number of children for %s node.", name); |
| 970 | err_string(buff); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 971 | } |
| 972 | return (NCH(n) == num); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 973 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 974 | |
| 975 | |
| 976 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 977 | validate_terminal(node *terminal, int type, char *string) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 978 | { |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 979 | int res = (validate_ntype(terminal, type) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 980 | && ((string == 0) || (strcmp(string, STR(terminal)) == 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 981 | |
| 982 | if (!res && !PyErr_Occurred()) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 983 | char buffer[60]; |
| 984 | (void) sprintf(buffer, "Illegal terminal: expected \"%s\"", string); |
| 985 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 986 | } |
| 987 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 988 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 989 | |
| 990 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 991 | /* X (',' X) [','] |
| 992 | */ |
| 993 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 994 | validate_repeating_list(node *tree, int ntype, int (*vfunc)(), |
| 995 | const char *const name) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 996 | { |
| 997 | int nch = NCH(tree); |
| 998 | int res = (nch && validate_ntype(tree, ntype) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 999 | && vfunc(CHILD(tree, 0))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1000 | |
| 1001 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1002 | (void) validate_numnodes(tree, 1, name); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1003 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1004 | if (is_even(nch)) |
| 1005 | res = validate_comma(CHILD(tree, --nch)); |
| 1006 | if (res && nch > 1) { |
| 1007 | int pos = 1; |
| 1008 | for ( ; res && pos < nch; pos += 2) |
| 1009 | res = (validate_comma(CHILD(tree, pos)) |
| 1010 | && vfunc(CHILD(tree, pos + 1))); |
| 1011 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1012 | } |
| 1013 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1014 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1015 | |
| 1016 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1017 | /* VALIDATE(class) |
| 1018 | * |
| 1019 | * classdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1020 | * 'class' NAME ['(' testlist ')'] ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1021 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1022 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1023 | validate_class(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1024 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1025 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1026 | int res = validate_ntype(tree, classdef) && ((nch == 4) || (nch == 7)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1027 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1028 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1029 | res = (validate_name(CHILD(tree, 0), "class") |
| 1030 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1031 | && validate_colon(CHILD(tree, nch - 2)) |
| 1032 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1033 | } |
| 1034 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1035 | (void) validate_numnodes(tree, 4, "class"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1036 | if (res && (nch == 7)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1037 | res = (validate_lparen(CHILD(tree, 2)) |
| 1038 | && validate_testlist(CHILD(tree, 3)) |
| 1039 | && validate_rparen(CHILD(tree, 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1040 | } |
| 1041 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1042 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1043 | |
| 1044 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1045 | /* if_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1046 | * 'if' test ':' suite ('elif' test ':' suite)* ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1047 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1048 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1049 | validate_if(node *tree) |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1050 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1051 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1052 | int res = (validate_ntype(tree, if_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1053 | && (nch >= 4) |
| 1054 | && validate_name(CHILD(tree, 0), "if") |
| 1055 | && validate_test(CHILD(tree, 1)) |
| 1056 | && validate_colon(CHILD(tree, 2)) |
| 1057 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1058 | |
| 1059 | if (res && ((nch % 4) == 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1060 | /* ... 'else' ':' suite */ |
| 1061 | res = (validate_name(CHILD(tree, nch - 3), "else") |
| 1062 | && validate_colon(CHILD(tree, nch - 2)) |
| 1063 | && validate_suite(CHILD(tree, nch - 1))); |
| 1064 | nch -= 3; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1065 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1066 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1067 | (void) validate_numnodes(tree, 4, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1068 | if ((nch % 4) != 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1069 | /* Will catch the case for nch < 4 */ |
| 1070 | res = validate_numnodes(tree, 0, "if"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1071 | else if (res && (nch > 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1072 | /* ... ('elif' test ':' suite)+ ... */ |
| 1073 | int j = 4; |
| 1074 | while ((j < nch) && res) { |
| 1075 | res = (validate_name(CHILD(tree, j), "elif") |
| 1076 | && validate_colon(CHILD(tree, j + 2)) |
| 1077 | && validate_test(CHILD(tree, j + 1)) |
| 1078 | && validate_suite(CHILD(tree, j + 3))); |
| 1079 | j += 4; |
| 1080 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1081 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1082 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1083 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1084 | |
| 1085 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1086 | /* parameters: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1087 | * '(' [varargslist] ')' |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1088 | * |
| 1089 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1090 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1091 | validate_parameters(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1092 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1093 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1094 | int res = validate_ntype(tree, parameters) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1095 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1096 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1097 | res = (validate_lparen(CHILD(tree, 0)) |
| 1098 | && validate_rparen(CHILD(tree, nch - 1))); |
| 1099 | if (res && (nch == 3)) |
| 1100 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1101 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1102 | else { |
| 1103 | (void) validate_numnodes(tree, 2, "parameters"); |
| 1104 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1105 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1106 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1107 | |
| 1108 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1109 | /* VALIDATE(suite) |
| 1110 | * |
| 1111 | * suite: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1112 | * simple_stmt |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1113 | * | NEWLINE INDENT stmt+ DEDENT |
| 1114 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1115 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1116 | validate_suite(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1117 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1118 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1119 | int res = (validate_ntype(tree, suite) && ((nch == 1) || (nch >= 4))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1120 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1121 | if (res && (nch == 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1122 | res = validate_simple_stmt(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1123 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1124 | /* NEWLINE INDENT stmt+ DEDENT */ |
| 1125 | res = (validate_newline(CHILD(tree, 0)) |
| 1126 | && validate_indent(CHILD(tree, 1)) |
| 1127 | && validate_stmt(CHILD(tree, 2)) |
| 1128 | && validate_dedent(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1129 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1130 | if (res && (nch > 4)) { |
| 1131 | int i = 3; |
| 1132 | --nch; /* forget the DEDENT */ |
| 1133 | for ( ; res && (i < nch); ++i) |
| 1134 | res = validate_stmt(CHILD(tree, i)); |
| 1135 | } |
| 1136 | else if (nch < 4) |
| 1137 | res = validate_numnodes(tree, 4, "suite"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1138 | } |
| 1139 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1140 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1141 | |
| 1142 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1143 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1144 | validate_testlist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1145 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1146 | return (validate_repeating_list(tree, testlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1147 | validate_test, "testlist")); |
| 1148 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1149 | |
| 1150 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1151 | /* VALIDATE(varargslist) |
| 1152 | * |
| 1153 | * varargslist: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1154 | * (fpdef ['=' test] ',')* ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1155 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1156 | * |
| 1157 | * (fpdef ['=' test] ',')* |
| 1158 | * ('*' NAME [',' ('**'|'*' '*') NAME] |
| 1159 | * | ('**'|'*' '*') NAME) |
| 1160 | * | fpdef ['=' test] (',' fpdef ['=' test])* [','] |
| 1161 | * |
| 1162 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1163 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1164 | validate_varargslist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1165 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1166 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1167 | int res = validate_ntype(tree, varargslist) && (nch != 0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1168 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1169 | if (res && (nch >= 2) && (TYPE(CHILD(tree, nch - 1)) == NAME)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1170 | /* (fpdef ['=' test] ',')* |
| 1171 | * ('*' NAME [',' '*' '*' NAME] | '*' '*' NAME) |
| 1172 | */ |
| 1173 | int pos = 0; |
| 1174 | int remaining = nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1175 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1176 | while (res && (TYPE(CHILD(tree, pos)) == fpdef)) { |
| 1177 | res = validate_fpdef(CHILD(tree, pos)); |
| 1178 | if (res) { |
| 1179 | if (TYPE(CHILD(tree, pos + 1)) == EQUAL) { |
| 1180 | res = validate_test(CHILD(tree, pos + 2)); |
| 1181 | pos += 2; |
| 1182 | } |
| 1183 | res = res && validate_comma(CHILD(tree, pos + 1)); |
| 1184 | pos += 2; |
| 1185 | } |
| 1186 | } |
| 1187 | if (res) { |
| 1188 | remaining = nch - pos; |
| 1189 | res = ((remaining == 2) || (remaining == 3) |
| 1190 | || (remaining == 5) || (remaining == 6)); |
| 1191 | if (!res) |
| 1192 | (void) validate_numnodes(tree, 2, "varargslist"); |
| 1193 | else if (TYPE(CHILD(tree, pos)) == DOUBLESTAR) |
| 1194 | return ((remaining == 2) |
| 1195 | && validate_ntype(CHILD(tree, pos+1), NAME)); |
| 1196 | else { |
| 1197 | res = validate_star(CHILD(tree, pos++)); |
| 1198 | --remaining; |
| 1199 | } |
| 1200 | } |
| 1201 | if (res) { |
| 1202 | if (remaining == 2) { |
| 1203 | res = (validate_star(CHILD(tree, pos)) |
| 1204 | && validate_ntype(CHILD(tree, pos + 1), NAME)); |
| 1205 | } |
| 1206 | else { |
| 1207 | res = validate_ntype(CHILD(tree, pos++), NAME); |
| 1208 | if (res && (remaining >= 4)) { |
| 1209 | res = validate_comma(CHILD(tree, pos)); |
| 1210 | if (--remaining == 3) |
| 1211 | res = (validate_star(CHILD(tree, pos + 1)) |
| 1212 | && validate_star(CHILD(tree, pos + 2))); |
| 1213 | else |
| 1214 | res = validate_ntype(CHILD(tree, pos + 1), DOUBLESTAR); |
| 1215 | } |
| 1216 | } |
| 1217 | } |
| 1218 | if (!res && !PyErr_Occurred()) |
| 1219 | err_string("Incorrect validation of variable arguments list."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1220 | } |
| 1221 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1222 | /* fpdef ['=' test] (',' fpdef ['=' test])* [','] */ |
| 1223 | if (TYPE(CHILD(tree, nch - 1)) == COMMA) |
| 1224 | --nch; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1225 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1226 | /* fpdef ['=' test] (',' fpdef ['=' test])* */ |
| 1227 | res = (is_odd(nch) |
| 1228 | && validate_fpdef(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1229 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1230 | if (res && (nch > 1)) { |
| 1231 | int pos = 1; |
| 1232 | if (TYPE(CHILD(tree, 1)) == EQUAL) { |
| 1233 | res = validate_test(CHILD(tree, 2)); |
| 1234 | pos += 2; |
| 1235 | } |
| 1236 | /* ... (',' fpdef ['=' test])* */ |
| 1237 | for ( ; res && (pos < nch); pos += 2) { |
| 1238 | /* ',' fpdef */ |
| 1239 | res = (validate_comma(CHILD(tree, pos)) |
| 1240 | && validate_fpdef(CHILD(tree, pos + 1))); |
| 1241 | if (res |
| 1242 | && ((nch - pos) > 2) |
| 1243 | && (TYPE(CHILD(tree, pos + 2)) == EQUAL)) { |
| 1244 | /* ['=' test] */ |
| 1245 | res = validate_test(CHILD(tree, pos + 3)); |
| 1246 | pos += 2; |
| 1247 | } |
| 1248 | } |
| 1249 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1250 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1251 | else { |
| 1252 | err_string("Improperly formed argument list."); |
| 1253 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1254 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1255 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1256 | |
| 1257 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1258 | /* VALIDATE(fpdef) |
| 1259 | * |
| 1260 | * fpdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1261 | * NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1262 | * | '(' fplist ')' |
| 1263 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1264 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1265 | validate_fpdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1266 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1267 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1268 | int res = validate_ntype(tree, fpdef); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1269 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1270 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1271 | if (nch == 1) |
| 1272 | res = validate_ntype(CHILD(tree, 0), NAME); |
| 1273 | else if (nch == 3) |
| 1274 | res = (validate_lparen(CHILD(tree, 0)) |
| 1275 | && validate_fplist(CHILD(tree, 1)) |
| 1276 | && validate_rparen(CHILD(tree, 2))); |
| 1277 | else |
| 1278 | res = validate_numnodes(tree, 1, "fpdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1279 | } |
| 1280 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1281 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1282 | |
| 1283 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1284 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1285 | validate_fplist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1286 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1287 | return (validate_repeating_list(tree, fplist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1288 | validate_fpdef, "fplist")); |
| 1289 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1290 | |
| 1291 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1292 | /* simple_stmt | compound_stmt |
| 1293 | * |
| 1294 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1295 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1296 | validate_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1297 | { |
| 1298 | int res = (validate_ntype(tree, stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1299 | && validate_numnodes(tree, 1, "stmt")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1300 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1301 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1302 | tree = CHILD(tree, 0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1303 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1304 | if (TYPE(tree) == simple_stmt) |
| 1305 | res = validate_simple_stmt(tree); |
| 1306 | else |
| 1307 | res = validate_compound_stmt(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1308 | } |
| 1309 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1310 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1311 | |
| 1312 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1313 | /* small_stmt (';' small_stmt)* [';'] NEWLINE |
| 1314 | * |
| 1315 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1316 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1317 | validate_simple_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1318 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1319 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1320 | int res = (validate_ntype(tree, simple_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1321 | && (nch >= 2) |
| 1322 | && validate_small_stmt(CHILD(tree, 0)) |
| 1323 | && validate_newline(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1324 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1325 | if (nch < 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1326 | res = validate_numnodes(tree, 2, "simple_stmt"); |
| 1327 | --nch; /* forget the NEWLINE */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1328 | if (res && is_even(nch)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1329 | res = validate_semi(CHILD(tree, --nch)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1330 | if (res && (nch > 2)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1331 | int i; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1332 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1333 | for (i = 1; res && (i < nch); i += 2) |
| 1334 | res = (validate_semi(CHILD(tree, i)) |
| 1335 | && validate_small_stmt(CHILD(tree, i + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1336 | } |
| 1337 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1338 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1339 | |
| 1340 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1341 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1342 | validate_small_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1343 | { |
| 1344 | int nch = NCH(tree); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1345 | int res = (validate_numnodes(tree, 1, "small_stmt") |
| 1346 | && ((TYPE(CHILD(tree, 0)) == expr_stmt) |
| 1347 | || (TYPE(CHILD(tree, 0)) == print_stmt) |
| 1348 | || (TYPE(CHILD(tree, 0)) == del_stmt) |
| 1349 | || (TYPE(CHILD(tree, 0)) == pass_stmt) |
| 1350 | || (TYPE(CHILD(tree, 0)) == flow_stmt) |
| 1351 | || (TYPE(CHILD(tree, 0)) == import_stmt) |
| 1352 | || (TYPE(CHILD(tree, 0)) == global_stmt) |
| 1353 | || (TYPE(CHILD(tree, 0)) == assert_stmt) |
| 1354 | || (TYPE(CHILD(tree, 0)) == exec_stmt))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1355 | |
| 1356 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1357 | res = validate_node(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1358 | else if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1359 | char buffer[60]; |
| 1360 | (void) sprintf(buffer, "Unrecognized child node of small_stmt: %d.", |
| 1361 | TYPE(CHILD(tree, 0))); |
| 1362 | err_string(buffer); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1363 | } |
| 1364 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1365 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1366 | |
| 1367 | |
| 1368 | /* compound_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1369 | * if_stmt | while_stmt | for_stmt | try_stmt | funcdef | classdef |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1370 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1371 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1372 | validate_compound_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1373 | { |
| 1374 | int res = (validate_ntype(tree, compound_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1375 | && validate_numnodes(tree, 1, "compound_stmt")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1376 | |
| 1377 | if (!res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1378 | return (0); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1379 | |
| 1380 | tree = CHILD(tree, 0); |
| 1381 | res = ((TYPE(tree) == if_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1382 | || (TYPE(tree) == while_stmt) |
| 1383 | || (TYPE(tree) == for_stmt) |
| 1384 | || (TYPE(tree) == try_stmt) |
| 1385 | || (TYPE(tree) == funcdef) |
| 1386 | || (TYPE(tree) == classdef)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1387 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1388 | res = validate_node(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1389 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1390 | char buffer[60]; |
| 1391 | (void) sprintf(buffer, "Illegal compound statement type: %d.", |
| 1392 | TYPE(tree)); |
| 1393 | err_string(buffer); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1394 | } |
| 1395 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1396 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1397 | |
| 1398 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1399 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1400 | validate_expr_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1401 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1402 | int j; |
| 1403 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1404 | int res = (validate_ntype(tree, expr_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1405 | && is_odd(nch) |
| 1406 | && validate_testlist(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1407 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1408 | for (j = 1; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1409 | res = (validate_equal(CHILD(tree, j)) |
| 1410 | && validate_testlist(CHILD(tree, j + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1411 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1412 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1413 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1414 | |
| 1415 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1416 | /* print_stmt: |
| 1417 | * |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1418 | * 'print' (test ',')* [test] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1419 | * |
| 1420 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1421 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1422 | validate_print_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1423 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1424 | int j; |
| 1425 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1426 | int res = (validate_ntype(tree, print_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1427 | && (nch != 0) |
| 1428 | && validate_name(CHILD(tree, 0), "print")); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1429 | |
| 1430 | if (res && is_even(nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1431 | res = validate_test(CHILD(tree, nch - 1)); |
| 1432 | --nch; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1433 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1434 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1435 | (void) validate_numnodes(tree, 1, "print_stmt"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1436 | for (j = 1; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1437 | res = (validate_test(CHILD(tree, j)) |
| 1438 | && validate_ntype(CHILD(tree, j + 1), COMMA)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1439 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1440 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1441 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1442 | |
| 1443 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1444 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1445 | validate_del_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1446 | { |
| 1447 | return (validate_numnodes(tree, 2, "del_stmt") |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1448 | && validate_name(CHILD(tree, 0), "del") |
| 1449 | && validate_exprlist(CHILD(tree, 1))); |
| 1450 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1451 | |
| 1452 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1453 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1454 | validate_return_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1455 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1456 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1457 | int res = (validate_ntype(tree, return_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1458 | && ((nch == 1) || (nch == 2)) |
| 1459 | && validate_name(CHILD(tree, 0), "return")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1460 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1461 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1462 | res = validate_testlist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1463 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1464 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1465 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1466 | |
| 1467 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1468 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1469 | validate_raise_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1470 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1471 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1472 | int res = (validate_ntype(tree, raise_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1473 | && ((nch == 1) || (nch == 2) || (nch == 4) || (nch == 6))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1474 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1475 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1476 | res = validate_name(CHILD(tree, 0), "raise"); |
| 1477 | if (res && (nch >= 2)) |
| 1478 | res = validate_test(CHILD(tree, 1)); |
| 1479 | if (res && nch > 2) { |
| 1480 | res = (validate_comma(CHILD(tree, 2)) |
| 1481 | && validate_test(CHILD(tree, 3))); |
| 1482 | if (res && (nch > 4)) |
| 1483 | res = (validate_comma(CHILD(tree, 4)) |
| 1484 | && validate_test(CHILD(tree, 5))); |
| 1485 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1486 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1487 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1488 | (void) validate_numnodes(tree, 2, "raise"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1489 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1490 | res = (validate_comma(CHILD(tree, 2)) |
| 1491 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1492 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1493 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1494 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1495 | |
| 1496 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1497 | /* import_stmt: |
| 1498 | * |
| 1499 | * 'import' dotted_name (',' dotted_name)* |
| 1500 | * | 'from' dotted_name 'import' ('*' | NAME (',' NAME)*) |
| 1501 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1502 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1503 | validate_import_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1504 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1505 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1506 | int res = (validate_ntype(tree, import_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1507 | && (nch >= 2) && is_even(nch) |
| 1508 | && validate_ntype(CHILD(tree, 0), NAME) |
| 1509 | && validate_ntype(CHILD(tree, 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1510 | |
| 1511 | if (res && (strcmp(STR(CHILD(tree, 0)), "import") == 0)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1512 | int j; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1513 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1514 | for (j = 2; res && (j < nch); j += 2) |
| 1515 | res = (validate_comma(CHILD(tree, j)) |
| 1516 | && validate_ntype(CHILD(tree, j + 1), dotted_name)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1517 | } |
| 1518 | else if (res && validate_name(CHILD(tree, 0), "from")) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1519 | res = ((nch >= 4) && is_even(nch) |
| 1520 | && validate_name(CHILD(tree, 2), "import")); |
| 1521 | if (nch == 4) { |
| 1522 | res = ((TYPE(CHILD(tree, 3)) == NAME) |
| 1523 | || (TYPE(CHILD(tree, 3)) == STAR)); |
| 1524 | if (!res) |
| 1525 | err_string("Illegal import statement."); |
| 1526 | } |
| 1527 | else { |
| 1528 | /* 'from' NAME 'import' NAME (',' NAME)+ */ |
| 1529 | int j; |
| 1530 | res = validate_ntype(CHILD(tree, 3), NAME); |
| 1531 | for (j = 4; res && (j < nch); j += 2) |
| 1532 | res = (validate_comma(CHILD(tree, j)) |
| 1533 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
| 1534 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1535 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1536 | else |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1537 | res = 0; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1538 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1539 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1540 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1541 | |
| 1542 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1543 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1544 | validate_global_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1545 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1546 | int j; |
| 1547 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1548 | int res = (validate_ntype(tree, global_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1549 | && is_even(nch) && (nch >= 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1550 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1551 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1552 | res = (validate_name(CHILD(tree, 0), "global") |
| 1553 | && validate_ntype(CHILD(tree, 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1554 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1555 | res = (validate_comma(CHILD(tree, j)) |
| 1556 | && validate_ntype(CHILD(tree, j + 1), NAME)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1557 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1558 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1559 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1560 | |
| 1561 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1562 | /* exec_stmt: |
| 1563 | * |
| 1564 | * 'exec' expr ['in' test [',' test]] |
| 1565 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1566 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1567 | validate_exec_stmt(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1568 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1569 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1570 | int res = (validate_ntype(tree, exec_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1571 | && ((nch == 2) || (nch == 4) || (nch == 6)) |
| 1572 | && validate_name(CHILD(tree, 0), "exec") |
| 1573 | && validate_expr(CHILD(tree, 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1574 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1575 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1576 | err_string("Illegal exec statement."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1577 | if (res && (nch > 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1578 | res = (validate_name(CHILD(tree, 2), "in") |
| 1579 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1580 | if (res && (nch == 6)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1581 | res = (validate_comma(CHILD(tree, 4)) |
| 1582 | && validate_test(CHILD(tree, 5))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1583 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1584 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1585 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1586 | |
| 1587 | |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1588 | /* assert_stmt: |
| 1589 | * |
| 1590 | * 'assert' test [',' test] |
| 1591 | */ |
| 1592 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1593 | validate_assert_stmt(node *tree) |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1594 | { |
| 1595 | int nch = NCH(tree); |
| 1596 | int res = (validate_ntype(tree, assert_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1597 | && ((nch == 2) || (nch == 4)) |
| 1598 | && (validate_name(CHILD(tree, 0), "__assert__") || |
| 1599 | validate_name(CHILD(tree, 0), "assert")) |
| 1600 | && validate_test(CHILD(tree, 1))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1601 | |
| 1602 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1603 | err_string("Illegal assert statement."); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1604 | if (res && (nch > 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1605 | res = (validate_comma(CHILD(tree, 2)) |
| 1606 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1607 | |
| 1608 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1609 | } |
Guido van Rossum | 925e547 | 1997-04-02 05:32:13 +0000 | [diff] [blame] | 1610 | |
| 1611 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1612 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1613 | validate_while(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1614 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1615 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1616 | int res = (validate_ntype(tree, while_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1617 | && ((nch == 4) || (nch == 7)) |
| 1618 | && validate_name(CHILD(tree, 0), "while") |
| 1619 | && validate_test(CHILD(tree, 1)) |
| 1620 | && validate_colon(CHILD(tree, 2)) |
| 1621 | && validate_suite(CHILD(tree, 3))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1622 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1623 | if (res && (nch == 7)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1624 | res = (validate_name(CHILD(tree, 4), "else") |
| 1625 | && validate_colon(CHILD(tree, 5)) |
| 1626 | && validate_suite(CHILD(tree, 6))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1627 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1628 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1629 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1630 | |
| 1631 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1632 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1633 | validate_for(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1634 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1635 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1636 | int res = (validate_ntype(tree, for_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1637 | && ((nch == 6) || (nch == 9)) |
| 1638 | && validate_name(CHILD(tree, 0), "for") |
| 1639 | && validate_exprlist(CHILD(tree, 1)) |
| 1640 | && validate_name(CHILD(tree, 2), "in") |
| 1641 | && validate_testlist(CHILD(tree, 3)) |
| 1642 | && validate_colon(CHILD(tree, 4)) |
| 1643 | && validate_suite(CHILD(tree, 5))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1644 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1645 | if (res && (nch == 9)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1646 | res = (validate_name(CHILD(tree, 6), "else") |
| 1647 | && validate_colon(CHILD(tree, 7)) |
| 1648 | && validate_suite(CHILD(tree, 8))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1649 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1650 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1651 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1652 | |
| 1653 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1654 | /* try_stmt: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1655 | * 'try' ':' suite (except_clause ':' suite)+ ['else' ':' suite] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1656 | * | 'try' ':' suite 'finally' ':' suite |
| 1657 | * |
| 1658 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1659 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1660 | validate_try(tree) |
| 1661 | node *tree; |
| 1662 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1663 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1664 | int pos = 3; |
| 1665 | int res = (validate_ntype(tree, try_stmt) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1666 | && (nch >= 6) && ((nch % 3) == 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1667 | |
| 1668 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1669 | res = (validate_name(CHILD(tree, 0), "try") |
| 1670 | && validate_colon(CHILD(tree, 1)) |
| 1671 | && validate_suite(CHILD(tree, 2)) |
| 1672 | && validate_colon(CHILD(tree, nch - 2)) |
| 1673 | && validate_suite(CHILD(tree, nch - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1674 | else { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1675 | const char* name = "execpt"; |
| 1676 | char buffer[60]; |
| 1677 | if (TYPE(CHILD(tree, nch - 3)) != except_clause) |
| 1678 | name = STR(CHILD(tree, nch - 3)); |
| 1679 | (void) sprintf(buffer, |
| 1680 | "Illegal number of children for try/%s node.", name); |
| 1681 | err_string(buffer); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1682 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1683 | /* Skip past except_clause sections: */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1684 | while (res && (TYPE(CHILD(tree, pos)) == except_clause)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1685 | res = (validate_except_clause(CHILD(tree, pos)) |
| 1686 | && validate_colon(CHILD(tree, pos + 1)) |
| 1687 | && validate_suite(CHILD(tree, pos + 2))); |
| 1688 | pos += 3; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1689 | } |
| 1690 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1691 | res = validate_ntype(CHILD(tree, pos), NAME); |
| 1692 | if (res && (strcmp(STR(CHILD(tree, pos)), "finally") == 0)) |
| 1693 | res = (validate_numnodes(tree, 6, "try/finally") |
| 1694 | && validate_colon(CHILD(tree, 4)) |
| 1695 | && validate_suite(CHILD(tree, 5))); |
| 1696 | else if (res) { |
| 1697 | if (nch == (pos + 3)) { |
| 1698 | res = ((strcmp(STR(CHILD(tree, pos)), "except") == 0) |
| 1699 | || (strcmp(STR(CHILD(tree, pos)), "else") == 0)); |
| 1700 | if (!res) |
| 1701 | err_string("Illegal trailing triple in try statement."); |
| 1702 | } |
| 1703 | else if (nch == (pos + 6)) { |
| 1704 | res = (validate_name(CHILD(tree, pos), "except") |
| 1705 | && validate_colon(CHILD(tree, pos + 1)) |
| 1706 | && validate_suite(CHILD(tree, pos + 2)) |
| 1707 | && validate_name(CHILD(tree, pos + 3), "else")); |
| 1708 | } |
| 1709 | else |
| 1710 | res = validate_numnodes(tree, pos + 3, "try/except"); |
| 1711 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1712 | } |
| 1713 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1714 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1715 | |
| 1716 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1717 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1718 | validate_except_clause(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1719 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1720 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1721 | int res = (validate_ntype(tree, except_clause) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1722 | && ((nch == 1) || (nch == 2) || (nch == 4)) |
| 1723 | && validate_name(CHILD(tree, 0), "except")); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1724 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1725 | if (res && (nch > 1)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1726 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1727 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1728 | res = (validate_comma(CHILD(tree, 2)) |
| 1729 | && validate_test(CHILD(tree, 3))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1730 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1731 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1732 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1733 | |
| 1734 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1735 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1736 | validate_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1737 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1738 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1739 | int res = validate_ntype(tree, test) && is_odd(nch); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1740 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1741 | if (res && (TYPE(CHILD(tree, 0)) == lambdef)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1742 | res = ((nch == 1) |
| 1743 | && validate_lambdef(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1744 | else if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1745 | int pos; |
| 1746 | res = validate_and_test(CHILD(tree, 0)); |
| 1747 | for (pos = 1; res && (pos < nch); pos += 2) |
| 1748 | res = (validate_name(CHILD(tree, pos), "or") |
| 1749 | && validate_and_test(CHILD(tree, pos + 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1750 | } |
| 1751 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1752 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1753 | |
| 1754 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1755 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1756 | validate_and_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1757 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1758 | int pos; |
| 1759 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1760 | int res = (validate_ntype(tree, and_test) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1761 | && is_odd(nch) |
| 1762 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1763 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1764 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1765 | res = (validate_name(CHILD(tree, pos), "and") |
| 1766 | && validate_not_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1767 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1768 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1769 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1770 | |
| 1771 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1772 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1773 | validate_not_test(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1774 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1775 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1776 | int res = validate_ntype(tree, not_test) && ((nch == 1) || (nch == 2)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1777 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1778 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1779 | if (nch == 2) |
| 1780 | res = (validate_name(CHILD(tree, 0), "not") |
| 1781 | && validate_not_test(CHILD(tree, 1))); |
| 1782 | else if (nch == 1) |
| 1783 | res = validate_comparison(CHILD(tree, 0)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1784 | } |
| 1785 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1786 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1787 | |
| 1788 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1789 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1790 | validate_comparison(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1791 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1792 | int pos; |
| 1793 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1794 | int res = (validate_ntype(tree, comparison) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1795 | && is_odd(nch) |
| 1796 | && validate_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1797 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1798 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1799 | res = (validate_comp_op(CHILD(tree, pos)) |
| 1800 | && validate_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1801 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1802 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1803 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1804 | |
| 1805 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1806 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1807 | validate_comp_op(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1808 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1809 | int res = 0; |
| 1810 | int nch = NCH(tree); |
| 1811 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1812 | if (!validate_ntype(tree, comp_op)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1813 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1814 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1815 | /* |
| 1816 | * Only child will be a terminal with a well-defined symbolic name |
| 1817 | * or a NAME with a string of either 'is' or 'in' |
| 1818 | */ |
| 1819 | tree = CHILD(tree, 0); |
| 1820 | switch (TYPE(tree)) { |
| 1821 | case LESS: |
| 1822 | case GREATER: |
| 1823 | case EQEQUAL: |
| 1824 | case EQUAL: |
| 1825 | case LESSEQUAL: |
| 1826 | case GREATEREQUAL: |
| 1827 | case NOTEQUAL: |
| 1828 | res = 1; |
| 1829 | break; |
| 1830 | case NAME: |
| 1831 | res = ((strcmp(STR(tree), "in") == 0) |
| 1832 | || (strcmp(STR(tree), "is") == 0)); |
| 1833 | if (!res) { |
| 1834 | char buff[128]; |
| 1835 | (void) sprintf(buff, "Illegal operator: '%s'.", STR(tree)); |
| 1836 | err_string(buff); |
| 1837 | } |
| 1838 | break; |
| 1839 | default: |
| 1840 | err_string("Illegal comparison operator type."); |
| 1841 | break; |
| 1842 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1843 | } |
Guido van Rossum | a376cc5 | 1996-12-05 23:43:35 +0000 | [diff] [blame] | 1844 | else if ((res = validate_numnodes(tree, 2, "comp_op")) != 0) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1845 | res = (validate_ntype(CHILD(tree, 0), NAME) |
| 1846 | && validate_ntype(CHILD(tree, 1), NAME) |
| 1847 | && (((strcmp(STR(CHILD(tree, 0)), "is") == 0) |
| 1848 | && (strcmp(STR(CHILD(tree, 1)), "not") == 0)) |
| 1849 | || ((strcmp(STR(CHILD(tree, 0)), "not") == 0) |
| 1850 | && (strcmp(STR(CHILD(tree, 1)), "in") == 0)))); |
| 1851 | if (!res && !PyErr_Occurred()) |
| 1852 | err_string("Unknown comparison operator."); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1853 | } |
| 1854 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1855 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1856 | |
| 1857 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1858 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1859 | validate_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1860 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1861 | int j; |
| 1862 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1863 | int res = (validate_ntype(tree, expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1864 | && is_odd(nch) |
| 1865 | && validate_xor_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1866 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1867 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1868 | res = (validate_xor_expr(CHILD(tree, j)) |
| 1869 | && validate_vbar(CHILD(tree, j - 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1870 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1871 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1872 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1873 | |
| 1874 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1875 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1876 | validate_xor_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1877 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1878 | int j; |
| 1879 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1880 | int res = (validate_ntype(tree, xor_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1881 | && is_odd(nch) |
| 1882 | && validate_and_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1883 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1884 | for (j = 2; res && (j < nch); j += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1885 | res = (validate_circumflex(CHILD(tree, j - 1)) |
| 1886 | && validate_and_expr(CHILD(tree, j))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1887 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1888 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1889 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1890 | |
| 1891 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1892 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1893 | validate_and_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1894 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1895 | int pos; |
| 1896 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1897 | int res = (validate_ntype(tree, and_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1898 | && is_odd(nch) |
| 1899 | && validate_shift_expr(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1900 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1901 | for (pos = 1; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1902 | res = (validate_ampersand(CHILD(tree, pos)) |
| 1903 | && validate_shift_expr(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1904 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1905 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1906 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1907 | |
| 1908 | |
| 1909 | static int |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1910 | validate_chain_two_ops(tree, termvalid, op1, op2) |
| 1911 | node *tree; |
| 1912 | int (*termvalid)(); |
| 1913 | int op1; |
| 1914 | int op2; |
| 1915 | { |
| 1916 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1917 | int nch = NCH(tree); |
| 1918 | int res = (is_odd(nch) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1919 | && (*termvalid)(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1920 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1921 | for ( ; res && (pos < nch); pos += 2) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1922 | if (TYPE(CHILD(tree, pos)) != op1) |
| 1923 | res = validate_ntype(CHILD(tree, pos), op2); |
| 1924 | if (res) |
| 1925 | res = (*termvalid)(CHILD(tree, pos + 1)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1926 | } |
| 1927 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1928 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1929 | |
| 1930 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1931 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1932 | validate_shift_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1933 | { |
| 1934 | return (validate_ntype(tree, shift_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1935 | && validate_chain_two_ops(tree, validate_arith_expr, |
| 1936 | LEFTSHIFT, RIGHTSHIFT)); |
| 1937 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1938 | |
| 1939 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1940 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1941 | validate_arith_expr(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1942 | { |
| 1943 | return (validate_ntype(tree, arith_expr) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1944 | && validate_chain_two_ops(tree, validate_term, PLUS, MINUS)); |
| 1945 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1946 | |
| 1947 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1948 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1949 | validate_term(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1950 | { |
| 1951 | int pos = 1; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1952 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1953 | int res = (validate_ntype(tree, term) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1954 | && is_odd(nch) |
| 1955 | && validate_factor(CHILD(tree, 0))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1956 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1957 | for ( ; res && (pos < nch); pos += 2) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1958 | res = (((TYPE(CHILD(tree, pos)) == STAR) |
| 1959 | || (TYPE(CHILD(tree, pos)) == SLASH) |
| 1960 | || (TYPE(CHILD(tree, pos)) == PERCENT)) |
| 1961 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1962 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1963 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1964 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1965 | |
| 1966 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1967 | /* factor: |
| 1968 | * |
| 1969 | * factor: ('+'|'-'|'~') factor | power |
| 1970 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1971 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1972 | validate_factor(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1973 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1974 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1975 | int res = (validate_ntype(tree, factor) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1976 | && (((nch == 2) |
| 1977 | && ((TYPE(CHILD(tree, 0)) == PLUS) |
| 1978 | || (TYPE(CHILD(tree, 0)) == MINUS) |
| 1979 | || (TYPE(CHILD(tree, 0)) == TILDE)) |
| 1980 | && validate_factor(CHILD(tree, 1))) |
| 1981 | || ((nch == 1) |
| 1982 | && validate_power(CHILD(tree, 0))))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1983 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1984 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 1985 | |
| 1986 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1987 | /* power: |
| 1988 | * |
| 1989 | * power: atom trailer* ('**' factor)* |
| 1990 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 1991 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1992 | validate_power(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1993 | { |
| 1994 | int pos = 1; |
| 1995 | int nch = NCH(tree); |
| 1996 | int res = (validate_ntype(tree, power) && (nch >= 1) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 1997 | && validate_atom(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 1998 | |
| 1999 | while (res && (pos < nch) && (TYPE(CHILD(tree, pos)) == trailer)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2000 | res = validate_trailer(CHILD(tree, pos++)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2001 | if (res && (pos < nch)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2002 | if (!is_even(nch - pos)) { |
| 2003 | err_string("Illegal number of nodes for 'power'."); |
| 2004 | return (0); |
| 2005 | } |
| 2006 | for ( ; res && (pos < (nch - 1)); pos += 2) |
| 2007 | res = (validate_doublestar(CHILD(tree, pos)) |
| 2008 | && validate_factor(CHILD(tree, pos + 1))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2009 | } |
| 2010 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2011 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2012 | |
| 2013 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2014 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2015 | validate_atom(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2016 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2017 | int pos; |
| 2018 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2019 | int res = validate_ntype(tree, atom) && (nch >= 1); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2020 | |
| 2021 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2022 | switch (TYPE(CHILD(tree, 0))) { |
| 2023 | case LPAR: |
| 2024 | res = ((nch <= 3) |
| 2025 | && (validate_rparen(CHILD(tree, nch - 1)))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2026 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2027 | if (res && (nch == 3)) |
| 2028 | res = validate_testlist(CHILD(tree, 1)); |
| 2029 | break; |
| 2030 | case LSQB: |
| 2031 | res = ((nch <= 3) |
| 2032 | && validate_ntype(CHILD(tree, nch - 1), RSQB)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2033 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2034 | if (res && (nch == 3)) |
| 2035 | res = validate_testlist(CHILD(tree, 1)); |
| 2036 | break; |
| 2037 | case LBRACE: |
| 2038 | res = ((nch <= 3) |
| 2039 | && validate_ntype(CHILD(tree, nch - 1), RBRACE)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2040 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2041 | if (res && (nch == 3)) |
| 2042 | res = validate_dictmaker(CHILD(tree, 1)); |
| 2043 | break; |
| 2044 | case BACKQUOTE: |
| 2045 | res = ((nch == 3) |
| 2046 | && validate_testlist(CHILD(tree, 1)) |
| 2047 | && validate_ntype(CHILD(tree, 2), BACKQUOTE)); |
| 2048 | break; |
| 2049 | case NAME: |
| 2050 | case NUMBER: |
| 2051 | res = (nch == 1); |
| 2052 | break; |
| 2053 | case STRING: |
| 2054 | for (pos = 1; res && (pos < nch); ++pos) |
| 2055 | res = validate_ntype(CHILD(tree, pos), STRING); |
| 2056 | break; |
| 2057 | default: |
| 2058 | res = 0; |
| 2059 | break; |
| 2060 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2061 | } |
| 2062 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2063 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2064 | |
| 2065 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2066 | /* funcdef: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2067 | * 'def' NAME parameters ':' suite |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2068 | * |
| 2069 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2070 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2071 | validate_funcdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2072 | { |
| 2073 | return (validate_ntype(tree, funcdef) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2074 | && validate_numnodes(tree, 5, "funcdef") |
| 2075 | && validate_name(CHILD(tree, 0), "def") |
| 2076 | && validate_ntype(CHILD(tree, 1), NAME) |
| 2077 | && validate_colon(CHILD(tree, 3)) |
| 2078 | && validate_parameters(CHILD(tree, 2)) |
| 2079 | && validate_suite(CHILD(tree, 4))); |
| 2080 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2081 | |
| 2082 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2083 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2084 | validate_lambdef(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2085 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2086 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2087 | int res = (validate_ntype(tree, lambdef) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2088 | && ((nch == 3) || (nch == 4)) |
| 2089 | && validate_name(CHILD(tree, 0), "lambda") |
| 2090 | && validate_colon(CHILD(tree, nch - 2)) |
| 2091 | && validate_test(CHILD(tree, nch - 1))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2092 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2093 | if (res && (nch == 4)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2094 | res = validate_varargslist(CHILD(tree, 1)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2095 | else if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2096 | (void) validate_numnodes(tree, 3, "lambdef"); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2097 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2098 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2099 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2100 | |
| 2101 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2102 | /* arglist: |
| 2103 | * |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2104 | * (argument ',')* (argument* [','] | '*' test [',' '**' test] | '**' test) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2105 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2106 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2107 | validate_arglist(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2108 | { |
Fred Drake | e7ab64e | 2000-04-25 04:14:46 +0000 | [diff] [blame] | 2109 | int nch = NCH(tree); |
| 2110 | int i, ok; |
| 2111 | node *last; |
| 2112 | |
| 2113 | if (nch <= 0) |
| 2114 | /* raise the right error from having an invalid number of children */ |
| 2115 | return validate_numnodes(tree, nch + 1, "arglist"); |
| 2116 | |
| 2117 | last = CHILD(tree, nch - 1); |
| 2118 | if (TYPE(last) == test) { |
| 2119 | /* Extended call syntax introduced in Python 1.6 has been used; |
| 2120 | * validate and strip that off and continue; |
| 2121 | * adjust nch to perform the cut, and ensure resulting nch is even |
| 2122 | * (validation of the first part doesn't require that). |
| 2123 | */ |
| 2124 | if (nch < 2) { |
| 2125 | validate_numnodes(tree, nch + 1, "arglist"); |
| 2126 | return 0; |
| 2127 | } |
| 2128 | ok = validate_test(last); |
| 2129 | if (ok) { |
| 2130 | node *prev = CHILD(tree, nch - 2); |
| 2131 | /* next must be '*' or '**' */ |
| 2132 | if (validate_doublestar(prev)) { |
| 2133 | nch -= 2; |
| 2134 | if (nch >= 3) { |
| 2135 | /* may include: '*' test ',' */ |
| 2136 | last = CHILD(tree, nch - 1); |
| 2137 | prev = CHILD(tree, nch - 2); |
| 2138 | if (TYPE(prev) == test) { |
| 2139 | ok = validate_comma(last) |
| 2140 | && validate_test(prev) |
| 2141 | && validate_star(CHILD(tree, nch - 3)); |
| 2142 | if (ok) |
| 2143 | nch -= 3; |
| 2144 | } |
| 2145 | /* otherwise, nothing special */ |
| 2146 | } |
| 2147 | } |
| 2148 | else { |
| 2149 | /* must be only: '*' test */ |
| 2150 | PyErr_Clear(); |
| 2151 | ok = validate_star(prev); |
| 2152 | nch -= 2; |
| 2153 | } |
| 2154 | if (ok && is_odd(nch)) { |
| 2155 | /* Illegal number of nodes before extended call syntax; |
| 2156 | * validation of the "normal" arguments does not require |
| 2157 | * a trailing comma, but requiring an even number of |
| 2158 | * children will effect the same requirement. |
| 2159 | */ |
| 2160 | return validate_numnodes(tree, nch + 1, "arglist"); |
| 2161 | } |
| 2162 | } |
| 2163 | } |
| 2164 | /* what remains must be: (argument ",")* [argument [","]] */ |
| 2165 | i = 0; |
| 2166 | while (ok && nch - i >= 2) { |
| 2167 | ok = validate_argument(CHILD(tree, i)) |
| 2168 | && validate_comma(CHILD(tree, i + 1)); |
| 2169 | i += 2; |
| 2170 | } |
| 2171 | if (ok && i < nch) { |
| 2172 | ok = validate_comma(CHILD(tree, i)); |
| 2173 | ++i; |
| 2174 | } |
| 2175 | if (i != nch) { |
| 2176 | /* internal error! */ |
| 2177 | ok = 0; |
| 2178 | err_string("arglist: internal error; nch != i"); |
| 2179 | } |
| 2180 | return (ok); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2181 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2182 | |
| 2183 | |
| 2184 | |
| 2185 | /* argument: |
| 2186 | * |
| 2187 | * [test '='] test |
| 2188 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2189 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2190 | validate_argument(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2191 | { |
| 2192 | int nch = NCH(tree); |
| 2193 | int res = (validate_ntype(tree, argument) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2194 | && ((nch == 1) || (nch == 3)) |
| 2195 | && validate_test(CHILD(tree, 0))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2196 | |
| 2197 | if (res && (nch == 3)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2198 | res = (validate_equal(CHILD(tree, 1)) |
| 2199 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2200 | |
| 2201 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2202 | } |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2203 | |
| 2204 | |
| 2205 | |
| 2206 | /* trailer: |
| 2207 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2208 | * '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2209 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2210 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2211 | validate_trailer(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2212 | { |
| 2213 | int nch = NCH(tree); |
| 2214 | int res = validate_ntype(tree, trailer) && ((nch == 2) || (nch == 3)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2215 | |
| 2216 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2217 | switch (TYPE(CHILD(tree, 0))) { |
| 2218 | case LPAR: |
| 2219 | res = validate_rparen(CHILD(tree, nch - 1)); |
| 2220 | if (res && (nch == 3)) |
| 2221 | res = validate_arglist(CHILD(tree, 1)); |
| 2222 | break; |
| 2223 | case LSQB: |
| 2224 | res = (validate_numnodes(tree, 3, "trailer") |
| 2225 | && validate_subscriptlist(CHILD(tree, 1)) |
| 2226 | && validate_ntype(CHILD(tree, 2), RSQB)); |
| 2227 | break; |
| 2228 | case DOT: |
| 2229 | res = (validate_numnodes(tree, 2, "trailer") |
| 2230 | && validate_ntype(CHILD(tree, 1), NAME)); |
| 2231 | break; |
| 2232 | default: |
| 2233 | res = 0; |
| 2234 | break; |
| 2235 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2236 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2237 | else { |
| 2238 | (void) validate_numnodes(tree, 2, "trailer"); |
| 2239 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2240 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2241 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2242 | |
| 2243 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2244 | /* subscriptlist: |
| 2245 | * |
| 2246 | * subscript (',' subscript)* [','] |
| 2247 | */ |
| 2248 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2249 | validate_subscriptlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2250 | { |
| 2251 | return (validate_repeating_list(tree, subscriptlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2252 | validate_subscript, "subscriptlist")); |
| 2253 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2254 | |
| 2255 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2256 | /* subscript: |
| 2257 | * |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2258 | * '.' '.' '.' | test | [test] ':' [test] [sliceop] |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2259 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2260 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2261 | validate_subscript(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2262 | { |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2263 | int offset = 0; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2264 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2265 | int res = validate_ntype(tree, subscript) && (nch >= 1) && (nch <= 4); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2266 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2267 | if (!res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2268 | if (!PyErr_Occurred()) |
| 2269 | err_string("invalid number of arguments for subscript node"); |
| 2270 | return (0); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2271 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2272 | if (TYPE(CHILD(tree, 0)) == DOT) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2273 | /* take care of ('.' '.' '.') possibility */ |
| 2274 | return (validate_numnodes(tree, 3, "subscript") |
| 2275 | && validate_dot(CHILD(tree, 0)) |
| 2276 | && validate_dot(CHILD(tree, 1)) |
| 2277 | && validate_dot(CHILD(tree, 2))); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2278 | if (nch == 1) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2279 | if (TYPE(CHILD(tree, 0)) == test) |
| 2280 | res = validate_test(CHILD(tree, 0)); |
| 2281 | else |
| 2282 | res = validate_colon(CHILD(tree, 0)); |
| 2283 | return (res); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2284 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2285 | /* Must be [test] ':' [test] [sliceop], |
| 2286 | * but at least one of the optional components will |
| 2287 | * be present, but we don't know which yet. |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2288 | */ |
| 2289 | if ((TYPE(CHILD(tree, 0)) != COLON) || (nch == 4)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2290 | res = validate_test(CHILD(tree, 0)); |
| 2291 | offset = 1; |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2292 | } |
| 2293 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2294 | res = validate_colon(CHILD(tree, offset)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2295 | if (res) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2296 | int rem = nch - ++offset; |
| 2297 | if (rem) { |
| 2298 | if (TYPE(CHILD(tree, offset)) == test) { |
| 2299 | res = validate_test(CHILD(tree, offset)); |
| 2300 | ++offset; |
| 2301 | --rem; |
| 2302 | } |
| 2303 | if (res && rem) |
| 2304 | res = validate_sliceop(CHILD(tree, offset)); |
| 2305 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2306 | } |
| 2307 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2308 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2309 | |
| 2310 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2311 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2312 | validate_sliceop(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2313 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2314 | int nch = NCH(tree); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2315 | int res = ((nch == 1) || validate_numnodes(tree, 2, "sliceop")) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2316 | && validate_ntype(tree, sliceop); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2317 | if (!res && !PyErr_Occurred()) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2318 | res = validate_numnodes(tree, 1, "sliceop"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2319 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2320 | if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2321 | res = validate_colon(CHILD(tree, 0)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2322 | if (res && (nch == 2)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2323 | res = validate_test(CHILD(tree, 1)); |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2324 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2325 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2326 | } |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2327 | |
| 2328 | |
| 2329 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2330 | validate_exprlist(node *tree) |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2331 | { |
| 2332 | return (validate_repeating_list(tree, exprlist, |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2333 | validate_expr, "exprlist")); |
| 2334 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2335 | |
| 2336 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2337 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2338 | validate_dictmaker(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2339 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2340 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2341 | int res = (validate_ntype(tree, dictmaker) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2342 | && (nch >= 3) |
| 2343 | && validate_test(CHILD(tree, 0)) |
| 2344 | && validate_colon(CHILD(tree, 1)) |
| 2345 | && validate_test(CHILD(tree, 2))); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2346 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2347 | if (res && ((nch % 4) == 0)) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2348 | res = validate_comma(CHILD(tree, --nch)); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2349 | else if (res) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2350 | res = ((nch % 4) == 3); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2351 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2352 | if (res && (nch > 3)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2353 | int pos = 3; |
| 2354 | /* ( ',' test ':' test )* */ |
| 2355 | while (res && (pos < nch)) { |
| 2356 | res = (validate_comma(CHILD(tree, pos)) |
| 2357 | && validate_test(CHILD(tree, pos + 1)) |
| 2358 | && validate_colon(CHILD(tree, pos + 2)) |
| 2359 | && validate_test(CHILD(tree, pos + 3))); |
| 2360 | pos += 4; |
| 2361 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2362 | } |
| 2363 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2364 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2365 | |
| 2366 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2367 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2368 | validate_eval_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2369 | { |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2370 | int pos; |
| 2371 | int nch = NCH(tree); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2372 | int res = (validate_ntype(tree, eval_input) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2373 | && (nch >= 2) |
| 2374 | && validate_testlist(CHILD(tree, 0)) |
| 2375 | && validate_ntype(CHILD(tree, nch - 1), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2376 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2377 | for (pos = 1; res && (pos < (nch - 1)); ++pos) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2378 | res = validate_ntype(CHILD(tree, pos), NEWLINE); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2379 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2380 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2381 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2382 | |
| 2383 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2384 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2385 | validate_node(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2386 | { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2387 | int nch = 0; /* num. children on current node */ |
| 2388 | int res = 1; /* result value */ |
| 2389 | node* next = 0; /* node to process after this one */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2390 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2391 | while (res & (tree != 0)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2392 | nch = NCH(tree); |
| 2393 | next = 0; |
| 2394 | switch (TYPE(tree)) { |
| 2395 | /* |
| 2396 | * Definition nodes. |
| 2397 | */ |
| 2398 | case funcdef: |
| 2399 | res = validate_funcdef(tree); |
| 2400 | break; |
| 2401 | case classdef: |
| 2402 | res = validate_class(tree); |
| 2403 | break; |
| 2404 | /* |
| 2405 | * "Trivial" parse tree nodes. |
| 2406 | * (Why did I call these trivial?) |
| 2407 | */ |
| 2408 | case stmt: |
| 2409 | res = validate_stmt(tree); |
| 2410 | break; |
| 2411 | case small_stmt: |
| 2412 | /* |
| 2413 | * expr_stmt | print_stmt | del_stmt | pass_stmt | flow_stmt |
| 2414 | * | import_stmt | global_stmt | exec_stmt | assert_stmt |
| 2415 | */ |
| 2416 | res = validate_small_stmt(tree); |
| 2417 | break; |
| 2418 | case flow_stmt: |
| 2419 | res = (validate_numnodes(tree, 1, "flow_stmt") |
| 2420 | && ((TYPE(CHILD(tree, 0)) == break_stmt) |
| 2421 | || (TYPE(CHILD(tree, 0)) == continue_stmt) |
| 2422 | || (TYPE(CHILD(tree, 0)) == return_stmt) |
| 2423 | || (TYPE(CHILD(tree, 0)) == raise_stmt))); |
| 2424 | if (res) |
| 2425 | next = CHILD(tree, 0); |
| 2426 | else if (nch == 1) |
| 2427 | err_string("Illegal flow_stmt type."); |
| 2428 | break; |
| 2429 | /* |
| 2430 | * Compound statements. |
| 2431 | */ |
| 2432 | case simple_stmt: |
| 2433 | res = validate_simple_stmt(tree); |
| 2434 | break; |
| 2435 | case compound_stmt: |
| 2436 | res = validate_compound_stmt(tree); |
| 2437 | break; |
| 2438 | /* |
| 2439 | * Fundemental statements. |
| 2440 | */ |
| 2441 | case expr_stmt: |
| 2442 | res = validate_expr_stmt(tree); |
| 2443 | break; |
| 2444 | case print_stmt: |
| 2445 | res = validate_print_stmt(tree); |
| 2446 | break; |
| 2447 | case del_stmt: |
| 2448 | res = validate_del_stmt(tree); |
| 2449 | break; |
| 2450 | case pass_stmt: |
| 2451 | res = (validate_numnodes(tree, 1, "pass") |
| 2452 | && validate_name(CHILD(tree, 0), "pass")); |
| 2453 | break; |
| 2454 | case break_stmt: |
| 2455 | res = (validate_numnodes(tree, 1, "break") |
| 2456 | && validate_name(CHILD(tree, 0), "break")); |
| 2457 | break; |
| 2458 | case continue_stmt: |
| 2459 | res = (validate_numnodes(tree, 1, "continue") |
| 2460 | && validate_name(CHILD(tree, 0), "continue")); |
| 2461 | break; |
| 2462 | case return_stmt: |
| 2463 | res = validate_return_stmt(tree); |
| 2464 | break; |
| 2465 | case raise_stmt: |
| 2466 | res = validate_raise_stmt(tree); |
| 2467 | break; |
| 2468 | case import_stmt: |
| 2469 | res = validate_import_stmt(tree); |
| 2470 | break; |
| 2471 | case global_stmt: |
| 2472 | res = validate_global_stmt(tree); |
| 2473 | break; |
| 2474 | case exec_stmt: |
| 2475 | res = validate_exec_stmt(tree); |
| 2476 | break; |
| 2477 | case assert_stmt: |
| 2478 | res = validate_assert_stmt(tree); |
| 2479 | break; |
| 2480 | case if_stmt: |
| 2481 | res = validate_if(tree); |
| 2482 | break; |
| 2483 | case while_stmt: |
| 2484 | res = validate_while(tree); |
| 2485 | break; |
| 2486 | case for_stmt: |
| 2487 | res = validate_for(tree); |
| 2488 | break; |
| 2489 | case try_stmt: |
| 2490 | res = validate_try(tree); |
| 2491 | break; |
| 2492 | case suite: |
| 2493 | res = validate_suite(tree); |
| 2494 | break; |
| 2495 | /* |
| 2496 | * Expression nodes. |
| 2497 | */ |
| 2498 | case testlist: |
| 2499 | res = validate_testlist(tree); |
| 2500 | break; |
| 2501 | case test: |
| 2502 | res = validate_test(tree); |
| 2503 | break; |
| 2504 | case and_test: |
| 2505 | res = validate_and_test(tree); |
| 2506 | break; |
| 2507 | case not_test: |
| 2508 | res = validate_not_test(tree); |
| 2509 | break; |
| 2510 | case comparison: |
| 2511 | res = validate_comparison(tree); |
| 2512 | break; |
| 2513 | case exprlist: |
| 2514 | res = validate_exprlist(tree); |
| 2515 | break; |
| 2516 | case comp_op: |
| 2517 | res = validate_comp_op(tree); |
| 2518 | break; |
| 2519 | case expr: |
| 2520 | res = validate_expr(tree); |
| 2521 | break; |
| 2522 | case xor_expr: |
| 2523 | res = validate_xor_expr(tree); |
| 2524 | break; |
| 2525 | case and_expr: |
| 2526 | res = validate_and_expr(tree); |
| 2527 | break; |
| 2528 | case shift_expr: |
| 2529 | res = validate_shift_expr(tree); |
| 2530 | break; |
| 2531 | case arith_expr: |
| 2532 | res = validate_arith_expr(tree); |
| 2533 | break; |
| 2534 | case term: |
| 2535 | res = validate_term(tree); |
| 2536 | break; |
| 2537 | case factor: |
| 2538 | res = validate_factor(tree); |
| 2539 | break; |
| 2540 | case power: |
| 2541 | res = validate_power(tree); |
| 2542 | break; |
| 2543 | case atom: |
| 2544 | res = validate_atom(tree); |
| 2545 | break; |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2546 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2547 | default: |
| 2548 | /* Hopefully never reached! */ |
| 2549 | err_string("Unrecogniged node type."); |
| 2550 | res = 0; |
| 2551 | break; |
| 2552 | } |
| 2553 | tree = next; |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2554 | } |
| 2555 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2556 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2557 | |
| 2558 | |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2559 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2560 | validate_expr_tree(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2561 | { |
| 2562 | int res = validate_eval_input(tree); |
| 2563 | |
| 2564 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2565 | err_string("Could not validate expression tuple."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2566 | |
| 2567 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2568 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2569 | |
| 2570 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2571 | /* file_input: |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2572 | * (NEWLINE | stmt)* ENDMARKER |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2573 | */ |
Guido van Rossum | 4747887 | 1996-08-21 14:32:37 +0000 | [diff] [blame] | 2574 | static int |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2575 | validate_file_input(node *tree) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2576 | { |
| 2577 | int j = 0; |
| 2578 | int nch = NCH(tree) - 1; |
| 2579 | int res = ((nch >= 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2580 | && validate_ntype(CHILD(tree, nch), ENDMARKER)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2581 | |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2582 | for ( ; res && (j < nch); ++j) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2583 | if (TYPE(CHILD(tree, j)) == stmt) |
| 2584 | res = validate_stmt(CHILD(tree, j)); |
| 2585 | else |
| 2586 | res = validate_newline(CHILD(tree, j)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2587 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2588 | /* This stays in to prevent any internal failues from getting to the |
| 2589 | * user. Hopefully, this won't be needed. If a user reports getting |
| 2590 | * this, we have some debugging to do. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2591 | */ |
| 2592 | if (!res && !PyErr_Occurred()) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2593 | err_string("VALIDATION FAILURE: report this to the maintainer!."); |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2594 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2595 | return (res); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2596 | } |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2597 | |
| 2598 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2599 | static PyObject* |
| 2600 | pickle_constructor = NULL; |
| 2601 | |
| 2602 | |
| 2603 | static PyObject* |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2604 | parser__pickler(PyObject *self, PyObject *args) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2605 | { |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 2606 | NOTE(ARGUNUSED(self)) |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2607 | PyObject *result = NULL; |
| 2608 | PyObject *ast = NULL; |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2609 | PyObject *empty_dict = NULL; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2610 | |
| 2611 | if (PyArg_ParseTuple(args, "O!:_pickler", &PyAST_Type, &ast)) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2612 | PyObject *newargs; |
| 2613 | PyObject *tuple; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2614 | |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2615 | if ((empty_dict = PyDict_New()) == NULL) |
| 2616 | goto finally; |
| 2617 | if ((newargs = Py_BuildValue("Oi", ast, 1)) == NULL) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2618 | goto finally; |
| 2619 | tuple = parser_ast2tuple((PyAST_Object*)NULL, newargs, empty_dict); |
| 2620 | if (tuple != NULL) { |
| 2621 | result = Py_BuildValue("O(O)", pickle_constructor, tuple); |
| 2622 | Py_DECREF(tuple); |
| 2623 | } |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2624 | Py_DECREF(empty_dict); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2625 | Py_DECREF(newargs); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2626 | } |
| 2627 | finally: |
Fred Drake | 2a6875e | 1999-09-20 22:32:18 +0000 | [diff] [blame] | 2628 | Py_XDECREF(empty_dict); |
| 2629 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2630 | return (result); |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2631 | } |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2632 | |
| 2633 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2634 | /* Functions exported by this module. Most of this should probably |
| 2635 | * be converted into an AST object with methods, but that is better |
| 2636 | * done directly in Python, allowing subclasses to be created directly. |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2637 | * We'd really have to write a wrapper around it all anyway to allow |
| 2638 | * inheritance. |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2639 | */ |
| 2640 | static PyMethodDef parser_functions[] = { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2641 | {"ast2tuple", (PyCFunction)parser_ast2tuple, PUBLIC_METHOD_TYPE, |
| 2642 | "Creates a tuple-tree representation of an AST."}, |
| 2643 | {"ast2list", (PyCFunction)parser_ast2list, PUBLIC_METHOD_TYPE, |
| 2644 | "Creates a list-tree representation of an AST."}, |
| 2645 | {"compileast", (PyCFunction)parser_compileast, PUBLIC_METHOD_TYPE, |
| 2646 | "Compiles an AST object into a code object."}, |
| 2647 | {"expr", (PyCFunction)parser_expr, PUBLIC_METHOD_TYPE, |
| 2648 | "Creates an AST object from an expression."}, |
| 2649 | {"isexpr", (PyCFunction)parser_isexpr, PUBLIC_METHOD_TYPE, |
| 2650 | "Determines if an AST object was created from an expression."}, |
| 2651 | {"issuite", (PyCFunction)parser_issuite, PUBLIC_METHOD_TYPE, |
| 2652 | "Determines if an AST object was created from a suite."}, |
| 2653 | {"suite", (PyCFunction)parser_suite, PUBLIC_METHOD_TYPE, |
| 2654 | "Creates an AST object from a suite."}, |
| 2655 | {"sequence2ast", (PyCFunction)parser_tuple2ast, PUBLIC_METHOD_TYPE, |
| 2656 | "Creates an AST object from a tree representation."}, |
| 2657 | {"tuple2ast", (PyCFunction)parser_tuple2ast, PUBLIC_METHOD_TYPE, |
| 2658 | "Creates an AST object from a tree representation."}, |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2659 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2660 | /* private stuff: support pickle module */ |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2661 | {"_pickler", (PyCFunction)parser__pickler, METH_VARARGS, |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2662 | "Returns the pickle magic to allow ast objects to be pickled."}, |
| 2663 | |
Fred Drake | 268397f | 1998-04-29 14:16:32 +0000 | [diff] [blame] | 2664 | {NULL, NULL, 0, NULL} |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2665 | }; |
| 2666 | |
| 2667 | |
Guido van Rossum | 3886bb6 | 1998-12-04 18:50:17 +0000 | [diff] [blame] | 2668 | DL_EXPORT(void) |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2669 | initparser() |
| 2670 | { |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 2671 | PyObject* module; |
| 2672 | PyObject* dict; |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2673 | |
Guido van Rossum | f2b2dac | 1997-01-23 23:29:44 +0000 | [diff] [blame] | 2674 | PyAST_Type.ob_type = &PyType_Type; |
| 2675 | module = Py_InitModule("parser", parser_functions); |
| 2676 | dict = PyModule_GetDict(module); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2677 | |
Fred Drake | 7a15ba5 | 1999-09-09 14:21:52 +0000 | [diff] [blame] | 2678 | if (parser_error == 0) |
| 2679 | parser_error = PyErr_NewException("parser.ParserError", NULL, NULL); |
| 2680 | else |
| 2681 | puts("parser module initialized more than once!"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2682 | |
| 2683 | if ((parser_error == 0) |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2684 | || (PyDict_SetItemString(dict, "ParserError", parser_error) != 0)) { |
| 2685 | /* |
| 2686 | * This is serious. |
| 2687 | */ |
| 2688 | Py_FatalError("can't define parser.ParserError"); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2689 | } |
| 2690 | /* |
| 2691 | * Nice to have, but don't cry if we fail. |
| 2692 | */ |
Guido van Rossum | 3d602e3 | 1996-07-21 02:33:56 +0000 | [diff] [blame] | 2693 | Py_INCREF(&PyAST_Type); |
| 2694 | PyDict_SetItemString(dict, "ASTType", (PyObject*)&PyAST_Type); |
| 2695 | |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2696 | PyDict_SetItemString(dict, "__copyright__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2697 | PyString_FromString(parser_copyright_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2698 | PyDict_SetItemString(dict, "__doc__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2699 | PyString_FromString(parser_doc_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2700 | PyDict_SetItemString(dict, "__version__", |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2701 | PyString_FromString(parser_version_string)); |
Guido van Rossum | d9e9f9c | 1995-10-11 17:35:38 +0000 | [diff] [blame] | 2702 | |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2703 | /* register to support pickling */ |
| 2704 | module = PyImport_ImportModule("copy_reg"); |
| 2705 | if (module != NULL) { |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2706 | PyObject *func, *pickler; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2707 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2708 | func = PyObject_GetAttrString(module, "pickle"); |
| 2709 | pickle_constructor = PyDict_GetItemString(dict, "sequence2ast"); |
| 2710 | pickler = PyDict_GetItemString(dict, "_pickler"); |
| 2711 | Py_XINCREF(pickle_constructor); |
| 2712 | if ((func != NULL) && (pickle_constructor != NULL) |
| 2713 | && (pickler != NULL)) { |
| 2714 | PyObject *res; |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2715 | |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2716 | res = PyObject_CallFunction( |
| 2717 | func, "OOO", &PyAST_Type, pickler, pickle_constructor); |
| 2718 | Py_XDECREF(res); |
| 2719 | } |
| 2720 | Py_XDECREF(func); |
| 2721 | Py_DECREF(module); |
Fred Drake | 43f8f9b | 1998-04-13 16:25:46 +0000 | [diff] [blame] | 2722 | } |
Fred Drake | ff9ea48 | 2000-04-19 13:54:15 +0000 | [diff] [blame] | 2723 | } |