Mercurial > cpython-lru_cache-weakref
annotate Python/ast.c @ 78335:fd5166fdb978 3.2
Issue #12288: Consider '0' and '0.0' as valid initialvalue for tkinter SimpleDialog.
| author | Andrew Svetlov <andrew.svetlov@gmail.com> |
|---|---|
| date | Mon, 30 Jul 2012 19:59:53 +0300 |
| parents | 5fe780c9638a |
| children | 0db75a55145a 6d992dea9391 |
| rev | line source |
|---|---|
| 35742 | 1 /* |
| 2 * This file includes functions to transform a concrete syntax tree (CST) to | |
| 3 * an abstract syntax tree (AST). The main function is PyAST_FromNode(). | |
| 4 * | |
| 5 */ | |
| 6 #include "Python.h" | |
| 7 #include "Python-ast.h" | |
| 8 #include "grammar.h" | |
| 9 #include "node.h" | |
| 10 #include "ast.h" | |
| 11 #include "token.h" | |
| 12 #include "parsetok.h" | |
| 13 #include "graminit.h" | |
| 14 | |
| 15 #include <assert.h> | |
| 16 | |
| 17 /* Data structure used internally */ | |
| 18 struct compiling { | |
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19 char *c_encoding; /* source encoding */ |
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20 PyArena *c_arena; /* arena for allocating memeory */ |
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21 const char *c_filename; /* filename */ |
| 35742 | 22 }; |
| 23 | |
| 24 static asdl_seq *seq_for_testlist(struct compiling *, const node *); | |
| 25 static expr_ty ast_for_expr(struct compiling *, const node *); | |
| 26 static stmt_ty ast_for_stmt(struct compiling *, const node *); | |
| 27 static asdl_seq *ast_for_suite(struct compiling *, const node *); | |
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28 static asdl_seq *ast_for_exprlist(struct compiling *, const node *, |
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29 expr_context_ty); |
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30 static expr_ty ast_for_testlist(struct compiling *, const node *); |
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31 static stmt_ty ast_for_classdef(struct compiling *, const node *, asdl_seq *); |
| 35742 | 32 |
| 33 /* Note different signature for ast_for_call */ | |
| 34 static expr_ty ast_for_call(struct compiling *, const node *, expr_ty); | |
| 35 | |
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36 static PyObject *parsenumber(struct compiling *, const char *); |
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37 static PyObject *parsestr(struct compiling *, const node *n, int *bytesmode); |
| 40894 | 38 static PyObject *parsestrplus(struct compiling *, const node *n, |
| 39 int *bytesmode); | |
| 35742 | 40 |
| 41 #ifndef LINENO | |
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42 #define LINENO(n) ((n)->n_lineno) |
| 35742 | 43 #endif |
| 44 | |
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45 #define COMP_GENEXP 0 |
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46 #define COMP_LISTCOMP 1 |
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47 #define COMP_SETCOMP 2 |
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48 |
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49 static identifier |
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50 new_identifier(const char* n, PyArena *arena) |
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51 { |
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52 PyObject* id = PyUnicode_DecodeUTF8(n, strlen(n), NULL); |
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53 Py_UNICODE *u; |
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54 if (!id) |
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55 return NULL; |
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56 u = PyUnicode_AS_UNICODE(id); |
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57 /* Check whether there are non-ASCII characters in the |
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58 identifier; if so, normalize to NFKC. */ |
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59 for (; *u; u++) { |
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60 if (*u >= 128) { |
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61 PyObject *m = PyImport_ImportModuleNoBlock("unicodedata"); |
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62 PyObject *id2; |
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63 if (!m) |
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64 return NULL; |
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65 id2 = PyObject_CallMethod(m, "normalize", "sO", "NFKC", id); |
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66 Py_DECREF(m); |
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67 if (!id2) |
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68 return NULL; |
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69 Py_DECREF(id); |
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70 id = id2; |
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71 break; |
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72 } |
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73 } |
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74 PyUnicode_InternInPlace(&id); |
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75 PyArena_AddPyObject(arena, id); |
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76 return id; |
| 35742 | 77 } |
| 78 | |
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79 #define NEW_IDENTIFIER(n) new_identifier(STR(n), c->c_arena) |
| 35742 | 80 |
| 81 /* This routine provides an invalid object for the syntax error. | |
| 82 The outermost routine must unpack this error and create the | |
| 83 proper object. We do this so that we don't have to pass | |
| 84 the filename to everything function. | |
| 85 | |
| 86 XXX Maybe we should just pass the filename... | |
| 87 */ | |
| 88 | |
| 89 static int | |
| 90 ast_error(const node *n, const char *errstr) | |
| 91 { | |
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92 PyObject *u = Py_BuildValue("zii", errstr, LINENO(n), n->n_col_offset); |
| 35742 | 93 if (!u) |
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94 return 0; |
| 35742 | 95 PyErr_SetObject(PyExc_SyntaxError, u); |
| 96 Py_DECREF(u); | |
| 97 return 0; | |
| 98 } | |
| 99 | |
| 100 static void | |
| 101 ast_error_finish(const char *filename) | |
| 102 { | |
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103 PyObject *type, *value, *tback, *errstr, *offset, *loc, *tmp; |
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104 PyObject *filename_obj; |
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105 long lineno; |
| 35742 | 106 |
| 107 assert(PyErr_Occurred()); | |
| 108 if (!PyErr_ExceptionMatches(PyExc_SyntaxError)) | |
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109 return; |
| 35742 | 110 |
| 111 PyErr_Fetch(&type, &value, &tback); | |
| 112 errstr = PyTuple_GetItem(value, 0); | |
| 113 if (!errstr) | |
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114 return; |
| 35742 | 115 Py_INCREF(errstr); |
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116 lineno = PyLong_AsLong(PyTuple_GetItem(value, 1)); |
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117 if (lineno == -1) { |
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118 Py_DECREF(errstr); |
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119 return; |
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120 } |
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121 offset = PyTuple_GetItem(value, 2); |
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122 if (!offset) { |
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123 Py_DECREF(errstr); |
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124 return; |
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125 } |
| 35742 | 126 Py_DECREF(value); |
| 127 | |
| 128 loc = PyErr_ProgramText(filename, lineno); | |
| 129 if (!loc) { | |
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130 Py_INCREF(Py_None); |
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131 loc = Py_None; |
| 35742 | 132 } |
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133 if (filename != NULL) |
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134 filename_obj = PyUnicode_DecodeFSDefault(filename); |
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135 else { |
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136 Py_INCREF(Py_None); |
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137 filename_obj = Py_None; |
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138 } |
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139 if (filename_obj != NULL) |
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140 tmp = Py_BuildValue("(NlOO)", filename_obj, lineno, offset, loc); |
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141 else |
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142 tmp = NULL; |
| 35742 | 143 Py_DECREF(loc); |
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144 if (!tmp) { |
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145 Py_DECREF(errstr); |
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146 return; |
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147 } |
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148 value = PyTuple_Pack(2, errstr, tmp); |
| 35742 | 149 Py_DECREF(errstr); |
| 150 Py_DECREF(tmp); | |
| 151 if (!value) | |
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152 return; |
| 35742 | 153 PyErr_Restore(type, value, tback); |
| 154 } | |
| 155 | |
| 156 /* num_stmts() returns number of contained statements. | |
| 157 | |
| 158 Use this routine to determine how big a sequence is needed for | |
| 159 the statements in a parse tree. Its raison d'etre is this bit of | |
| 160 grammar: | |
| 161 | |
| 162 stmt: simple_stmt | compound_stmt | |
| 163 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE | |
| 164 | |
| 165 A simple_stmt can contain multiple small_stmt elements joined | |
| 166 by semicolons. If the arg is a simple_stmt, the number of | |
| 167 small_stmt elements is returned. | |
| 168 */ | |
| 169 | |
| 170 static int | |
| 171 num_stmts(const node *n) | |
| 172 { | |
| 173 int i, l; | |
| 174 node *ch; | |
| 175 | |
| 176 switch (TYPE(n)) { | |
| 177 case single_input: | |
| 178 if (TYPE(CHILD(n, 0)) == NEWLINE) | |
| 179 return 0; | |
| 180 else | |
| 181 return num_stmts(CHILD(n, 0)); | |
| 182 case file_input: | |
| 183 l = 0; | |
| 184 for (i = 0; i < NCH(n); i++) { | |
| 185 ch = CHILD(n, i); | |
| 186 if (TYPE(ch) == stmt) | |
| 187 l += num_stmts(ch); | |
| 188 } | |
| 189 return l; | |
| 190 case stmt: | |
| 191 return num_stmts(CHILD(n, 0)); | |
| 192 case compound_stmt: | |
| 193 return 1; | |
| 194 case simple_stmt: | |
| 195 return NCH(n) / 2; /* Divide by 2 to remove count of semi-colons */ | |
| 196 case suite: | |
| 197 if (NCH(n) == 1) | |
| 198 return num_stmts(CHILD(n, 0)); | |
| 199 else { | |
| 200 l = 0; | |
| 201 for (i = 2; i < (NCH(n) - 1); i++) | |
| 202 l += num_stmts(CHILD(n, i)); | |
| 203 return l; | |
| 204 } | |
| 205 default: { | |
| 206 char buf[128]; | |
| 207 | |
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208 sprintf(buf, "Non-statement found: %d %d", |
| 35742 | 209 TYPE(n), NCH(n)); |
| 210 Py_FatalError(buf); | |
| 211 } | |
| 212 } | |
| 213 assert(0); | |
| 214 return 0; | |
| 215 } | |
| 216 | |
| 217 /* Transform the CST rooted at node * to the appropriate AST | |
| 218 */ | |
| 219 | |
| 220 mod_ty | |
|
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221 PyAST_FromNode(const node *n, PyCompilerFlags *flags, const char *filename, |
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222 PyArena *arena) |
| 35742 | 223 { |
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224 int i, j, k, num; |
| 35742 | 225 asdl_seq *stmts = NULL; |
| 226 stmt_ty s; | |
| 227 node *ch; | |
| 228 struct compiling c; | |
| 229 | |
| 230 if (flags && flags->cf_flags & PyCF_SOURCE_IS_UTF8) { | |
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231 c.c_encoding = "utf-8"; |
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232 if (TYPE(n) == encoding_decl) { |
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233 #if 0 |
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234 ast_error(n, "encoding declaration in Unicode string"); |
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235 goto error; |
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236 #endif |
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237 n = CHILD(n, 0); |
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238 } |
| 35742 | 239 } else if (TYPE(n) == encoding_decl) { |
| 240 c.c_encoding = STR(n); | |
| 241 n = CHILD(n, 0); | |
| 242 } else { | |
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243 /* PEP 3120 */ |
| 42403 | 244 c.c_encoding = "utf-8"; |
| 35742 | 245 } |
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246 c.c_arena = arena; |
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247 c.c_filename = filename; |
| 35742 | 248 |
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249 k = 0; |
| 35742 | 250 switch (TYPE(n)) { |
| 251 case file_input: | |
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252 stmts = asdl_seq_new(num_stmts(n), arena); |
| 35742 | 253 if (!stmts) |
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254 return NULL; |
| 35742 | 255 for (i = 0; i < NCH(n) - 1; i++) { |
| 256 ch = CHILD(n, i); | |
| 257 if (TYPE(ch) == NEWLINE) | |
| 258 continue; | |
| 259 REQ(ch, stmt); | |
| 260 num = num_stmts(ch); | |
| 261 if (num == 1) { | |
| 262 s = ast_for_stmt(&c, ch); | |
| 263 if (!s) | |
| 264 goto error; | |
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265 asdl_seq_SET(stmts, k++, s); |
| 35742 | 266 } |
| 267 else { | |
| 268 ch = CHILD(ch, 0); | |
| 269 REQ(ch, simple_stmt); | |
| 270 for (j = 0; j < num; j++) { | |
| 271 s = ast_for_stmt(&c, CHILD(ch, j * 2)); | |
| 272 if (!s) | |
| 273 goto error; | |
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274 asdl_seq_SET(stmts, k++, s); |
| 35742 | 275 } |
| 276 } | |
| 277 } | |
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278 return Module(stmts, arena); |
| 35742 | 279 case eval_input: { |
| 280 expr_ty testlist_ast; | |
| 281 | |
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282 /* XXX Why not comp_for here? */ |
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283 testlist_ast = ast_for_testlist(&c, CHILD(n, 0)); |
| 35742 | 284 if (!testlist_ast) |
| 285 goto error; | |
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286 return Expression(testlist_ast, arena); |
| 35742 | 287 } |
| 288 case single_input: | |
| 289 if (TYPE(CHILD(n, 0)) == NEWLINE) { | |
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290 stmts = asdl_seq_new(1, arena); |
| 35742 | 291 if (!stmts) |
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292 goto error; |
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293 asdl_seq_SET(stmts, 0, Pass(n->n_lineno, n->n_col_offset, |
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294 arena)); |
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295 if (!asdl_seq_GET(stmts, 0)) |
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296 goto error; |
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297 return Interactive(stmts, arena); |
| 35742 | 298 } |
| 299 else { | |
| 300 n = CHILD(n, 0); | |
| 301 num = num_stmts(n); | |
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302 stmts = asdl_seq_new(num, arena); |
| 35742 | 303 if (!stmts) |
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304 goto error; |
| 35742 | 305 if (num == 1) { |
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306 s = ast_for_stmt(&c, n); |
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307 if (!s) |
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308 goto error; |
| 35742 | 309 asdl_seq_SET(stmts, 0, s); |
| 310 } | |
| 311 else { | |
| 312 /* Only a simple_stmt can contain multiple statements. */ | |
| 313 REQ(n, simple_stmt); | |
| 314 for (i = 0; i < NCH(n); i += 2) { | |
| 315 if (TYPE(CHILD(n, i)) == NEWLINE) | |
| 316 break; | |
| 317 s = ast_for_stmt(&c, CHILD(n, i)); | |
| 318 if (!s) | |
| 319 goto error; | |
| 320 asdl_seq_SET(stmts, i / 2, s); | |
| 321 } | |
| 322 } | |
| 323 | |
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324 return Interactive(stmts, arena); |
| 35742 | 325 } |
| 326 default: | |
|
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327 PyErr_Format(PyExc_SystemError, |
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328 "invalid node %d for PyAST_FromNode", TYPE(n)); |
| 35742 | 329 goto error; |
| 330 } | |
| 331 error: | |
| 332 ast_error_finish(filename); | |
| 333 return NULL; | |
| 334 } | |
| 335 | |
| 336 /* Return the AST repr. of the operator represented as syntax (|, ^, etc.) | |
| 337 */ | |
| 338 | |
| 339 static operator_ty | |
| 340 get_operator(const node *n) | |
| 341 { | |
| 342 switch (TYPE(n)) { | |
| 343 case VBAR: | |
| 344 return BitOr; | |
| 345 case CIRCUMFLEX: | |
| 346 return BitXor; | |
| 347 case AMPER: | |
| 348 return BitAnd; | |
| 349 case LEFTSHIFT: | |
| 350 return LShift; | |
| 351 case RIGHTSHIFT: | |
| 352 return RShift; | |
| 353 case PLUS: | |
| 354 return Add; | |
| 355 case MINUS: | |
| 356 return Sub; | |
| 357 case STAR: | |
| 358 return Mult; | |
| 359 case SLASH: | |
| 360 return Div; | |
| 361 case DOUBLESLASH: | |
| 362 return FloorDiv; | |
| 363 case PERCENT: | |
| 364 return Mod; | |
| 365 default: | |
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366 return (operator_ty)0; |
| 35742 | 367 } |
| 368 } | |
| 369 | |
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370 static const char* FORBIDDEN[] = { |
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371 "None", |
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372 "True", |
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373 "False", |
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374 NULL, |
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375 }; |
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376 |
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377 static int |
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378 forbidden_name(identifier name, const node *n, int full_checks) |
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379 { |
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380 assert(PyUnicode_Check(name)); |
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381 if (PyUnicode_CompareWithASCIIString(name, "__debug__") == 0) { |
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382 ast_error(n, "assignment to keyword"); |
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383 return 1; |
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384 } |
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385 if (full_checks) { |
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386 const char **p; |
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387 for (p = FORBIDDEN; *p; p++) { |
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388 if (PyUnicode_CompareWithASCIIString(name, *p) == 0) { |
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389 ast_error(n, "assignment to keyword"); |
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390 return 1; |
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391 } |
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392 } |
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393 } |
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394 return 0; |
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395 } |
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396 |
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397 /* Set the context ctx for expr_ty e, recursively traversing e. |
| 35742 | 398 |
| 399 Only sets context for expr kinds that "can appear in assignment context" | |
| 400 (according to ../Parser/Python.asdl). For other expr kinds, it sets | |
| 401 an appropriate syntax error and returns false. | |
| 402 */ | |
| 403 | |
| 404 static int | |
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405 set_context(struct compiling *c, expr_ty e, expr_context_ty ctx, const node *n) |
| 35742 | 406 { |
| 407 asdl_seq *s = NULL; | |
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408 /* If a particular expression type can't be used for assign / delete, |
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409 set expr_name to its name and an error message will be generated. |
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410 */ |
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411 const char* expr_name = NULL; |
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412 |
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413 /* The ast defines augmented store and load contexts, but the |
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414 implementation here doesn't actually use them. The code may be |
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415 a little more complex than necessary as a result. It also means |
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416 that expressions in an augmented assignment have a Store context. |
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417 Consider restructuring so that augmented assignment uses |
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418 set_context(), too. |
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419 */ |
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420 assert(ctx != AugStore && ctx != AugLoad); |
| 35742 | 421 |
| 422 switch (e->kind) { | |
| 423 case Attribute_kind: | |
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424 e->v.Attribute.ctx = ctx; |
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425 if (ctx == Store && forbidden_name(e->v.Attribute.attr, n, 1)) |
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426 return 0; |
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429 e->v.Subscript.ctx = ctx; |
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431 case Starred_kind: |
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432 e->v.Starred.ctx = ctx; |
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433 if (!set_context(c, e->v.Starred.value, ctx, n)) |
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434 return 0; |
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437 if (ctx == Store) { |
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438 if (forbidden_name(e->v.Name.id, n, 1)) |
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439 return 0; /* forbidden_name() calls ast_error() */ |
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440 } |
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441 e->v.Name.ctx = ctx; |
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444 e->v.List.ctx = ctx; |
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445 s = e->v.List.elts; |
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448 if (asdl_seq_LEN(e->v.Tuple.elts)) { |
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449 e->v.Tuple.ctx = ctx; |
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450 s = e->v.Tuple.elts; |
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451 } |
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452 else { |
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453 expr_name = "()"; |
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454 } |
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456 case Lambda_kind: |
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457 expr_name = "lambda"; |
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458 break; |
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460 expr_name = "function call"; |
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461 break; |
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462 case BoolOp_kind: |
| 35742 | 463 case BinOp_kind: |
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464 case UnaryOp_kind: |
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465 expr_name = "operator"; |
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466 break; |
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468 expr_name = "generator expression"; |
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469 break; |
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470 case Yield_kind: |
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471 expr_name = "yield expression"; |
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473 case ListComp_kind: |
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474 expr_name = "list comprehension"; |
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475 break; |
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476 case SetComp_kind: |
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477 expr_name = "set comprehension"; |
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478 break; |
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479 case DictComp_kind: |
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480 expr_name = "dict comprehension"; |
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482 case Dict_kind: |
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483 case Set_kind: |
| 35742 | 484 case Num_kind: |
| 485 case Str_kind: | |
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486 case Bytes_kind: |
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487 expr_name = "literal"; |
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489 case Ellipsis_kind: |
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490 expr_name = "Ellipsis"; |
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491 break; |
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492 case Compare_kind: |
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493 expr_name = "comparison"; |
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494 break; |
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495 case IfExp_kind: |
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496 expr_name = "conditional expression"; |
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497 break; |
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498 default: |
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499 PyErr_Format(PyExc_SystemError, |
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500 "unexpected expression in assignment %d (line %d)", |
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501 e->kind, e->lineno); |
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502 return 0; |
| 35742 | 503 } |
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504 /* Check for error string set by switch */ |
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505 if (expr_name) { |
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506 char buf[300]; |
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507 PyOS_snprintf(buf, sizeof(buf), |
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508 "can't %s %s", |
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509 ctx == Store ? "assign to" : "delete", |
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510 expr_name); |
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511 return ast_error(n, buf); |
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512 } |
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513 |
| 35742 | 514 /* If the LHS is a list or tuple, we need to set the assignment |
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515 context for all the contained elements. |
| 35742 | 516 */ |
| 517 if (s) { | |
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518 int i; |
| 35742 | 519 |
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520 for (i = 0; i < asdl_seq_LEN(s); i++) { |
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521 if (!set_context(c, (expr_ty)asdl_seq_GET(s, i), ctx, n)) |
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522 return 0; |
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523 } |
| 35742 | 524 } |
| 525 return 1; | |
| 526 } | |
| 527 | |
| 528 static operator_ty | |
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529 ast_for_augassign(struct compiling *c, const node *n) |
| 35742 | 530 { |
| 531 REQ(n, augassign); | |
| 532 n = CHILD(n, 0); | |
| 533 switch (STR(n)[0]) { | |
| 534 case '+': | |
| 535 return Add; | |
| 536 case '-': | |
| 537 return Sub; | |
| 538 case '/': | |
| 539 if (STR(n)[1] == '/') | |
| 540 return FloorDiv; | |
| 541 else | |
| 542 return Div; | |
| 543 case '%': | |
| 544 return Mod; | |
| 545 case '<': | |
| 546 return LShift; | |
| 547 case '>': | |
| 548 return RShift; | |
| 549 case '&': | |
| 550 return BitAnd; | |
| 551 case '^': | |
| 552 return BitXor; | |
| 553 case '|': | |
| 554 return BitOr; | |
| 555 case '*': | |
| 556 if (STR(n)[1] == '*') | |
| 557 return Pow; | |
| 558 else | |
| 559 return Mult; | |
| 560 default: | |
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561 PyErr_Format(PyExc_SystemError, "invalid augassign: %s", STR(n)); |
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562 return (operator_ty)0; |
| 35742 | 563 } |
| 564 } | |
| 565 | |
| 566 static cmpop_ty | |
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567 ast_for_comp_op(struct compiling *c, const node *n) |
| 35742 | 568 { |
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569 /* comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is' |
| 35742 | 570 |'is' 'not' |
| 571 */ | |
| 572 REQ(n, comp_op); | |
| 573 if (NCH(n) == 1) { | |
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574 n = CHILD(n, 0); |
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575 switch (TYPE(n)) { |
| 35742 | 576 case LESS: |
| 577 return Lt; | |
| 578 case GREATER: | |
| 579 return Gt; | |
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580 case EQEQUAL: /* == */ |
| 35742 | 581 return Eq; |
| 582 case LESSEQUAL: | |
| 583 return LtE; | |
| 584 case GREATEREQUAL: | |
| 585 return GtE; | |
| 586 case NOTEQUAL: | |
| 587 return NotEq; | |
| 588 case NAME: | |
| 589 if (strcmp(STR(n), "in") == 0) | |
| 590 return In; | |
| 591 if (strcmp(STR(n), "is") == 0) | |
| 592 return Is; | |
| 593 default: | |
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594 PyErr_Format(PyExc_SystemError, "invalid comp_op: %s", |
| 35742 | 595 STR(n)); |
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596 return (cmpop_ty)0; |
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597 } |
| 35742 | 598 } |
| 599 else if (NCH(n) == 2) { | |
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600 /* handle "not in" and "is not" */ |
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601 switch (TYPE(CHILD(n, 0))) { |
| 35742 | 602 case NAME: |
| 603 if (strcmp(STR(CHILD(n, 1)), "in") == 0) | |
| 604 return NotIn; | |
| 605 if (strcmp(STR(CHILD(n, 0)), "is") == 0) | |
| 606 return IsNot; | |
| 607 default: | |
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608 PyErr_Format(PyExc_SystemError, "invalid comp_op: %s %s", |
| 35742 | 609 STR(CHILD(n, 0)), STR(CHILD(n, 1))); |
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610 return (cmpop_ty)0; |
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611 } |
| 35742 | 612 } |
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613 PyErr_Format(PyExc_SystemError, "invalid comp_op: has %d children", |
| 35742 | 614 NCH(n)); |
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615 return (cmpop_ty)0; |
| 35742 | 616 } |
| 617 | |
| 618 static asdl_seq * | |
| 619 seq_for_testlist(struct compiling *c, const node *n) | |
| 620 { | |
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621 /* testlist: test (',' test)* [','] |
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622 testlist_star_expr: test|star_expr (',' test|star_expr)* [','] |
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623 */ |
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624 asdl_seq *seq; |
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625 expr_ty expression; |
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626 int i; |
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627 assert(TYPE(n) == testlist || TYPE(n) == testlist_star_expr || TYPE(n) == testlist_comp); |
| 35742 | 628 |
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629 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 630 if (!seq) |
| 631 return NULL; | |
| 632 | |
| 633 for (i = 0; i < NCH(n); i += 2) { | |
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634 const node *ch = CHILD(n, i); |
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635 assert(TYPE(ch) == test || TYPE(ch) == test_nocond || TYPE(ch) == star_expr); |
| 35742 | 636 |
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637 expression = ast_for_expr(c, ch); |
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638 if (!expression) |
| 35742 | 639 return NULL; |
| 640 | |
| 641 assert(i / 2 < seq->size); | |
| 642 asdl_seq_SET(seq, i / 2, expression); | |
| 643 } | |
| 644 return seq; | |
| 645 } | |
| 646 | |
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647 static arg_ty |
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648 ast_for_arg(struct compiling *c, const node *n) |
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649 { |
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650 identifier name; |
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651 expr_ty annotation = NULL; |
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652 node *ch; |
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653 |
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654 assert(TYPE(n) == tfpdef || TYPE(n) == vfpdef); |
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655 ch = CHILD(n, 0); |
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656 name = NEW_IDENTIFIER(ch); |
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657 if (!name) |
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658 return NULL; |
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659 if (forbidden_name(name, ch, 0)) |
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660 return NULL; |
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661 |
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662 if (NCH(n) == 3 && TYPE(CHILD(n, 1)) == COLON) { |
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663 annotation = ast_for_expr(c, CHILD(n, 2)); |
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664 if (!annotation) |
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665 return NULL; |
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666 } |
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667 |
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668 return arg(name, annotation, c->c_arena); |
| 35742 | 669 } |
| 670 | |
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671 /* returns -1 if failed to handle keyword only arguments |
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672 returns new position to keep processing if successful |
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673 (',' tfpdef ['=' test])* |
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674 ^^^ |
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675 start pointing here |
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676 */ |
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677 static int |
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678 handle_keywordonly_args(struct compiling *c, const node *n, int start, |
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679 asdl_seq *kwonlyargs, asdl_seq *kwdefaults) |
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680 { |
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681 PyObject *argname; |
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682 node *ch; |
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683 expr_ty expression, annotation; |
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684 arg_ty arg; |
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685 int i = start; |
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686 int j = 0; /* index for kwdefaults and kwonlyargs */ |
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687 |
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688 if (kwonlyargs == NULL) { |
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689 ast_error(CHILD(n, start), "named arguments must follow bare *"); |
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690 return -1; |
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691 } |
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692 assert(kwdefaults != NULL); |
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693 while (i < NCH(n)) { |
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694 ch = CHILD(n, i); |
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695 switch (TYPE(ch)) { |
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696 case vfpdef: |
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697 case tfpdef: |
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698 if (i + 1 < NCH(n) && TYPE(CHILD(n, i + 1)) == EQUAL) { |
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699 expression = ast_for_expr(c, CHILD(n, i + 2)); |
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700 if (!expression) |
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701 goto error; |
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702 asdl_seq_SET(kwdefaults, j, expression); |
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703 i += 2; /* '=' and test */ |
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704 } |
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705 else { /* setting NULL if no default value exists */ |
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706 asdl_seq_SET(kwdefaults, j, NULL); |
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707 } |
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708 if (NCH(ch) == 3) { |
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709 /* ch is NAME ':' test */ |
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710 annotation = ast_for_expr(c, CHILD(ch, 2)); |
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711 if (!annotation) |
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712 goto error; |
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713 } |
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714 else { |
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715 annotation = NULL; |
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716 } |
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717 ch = CHILD(ch, 0); |
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718 argname = NEW_IDENTIFIER(ch); |
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30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
719 if (!argname) |
|
40215
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Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
720 goto error; |
|
54954
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
721 if (forbidden_name(argname, ch, 0)) |
|
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
722 goto error; |
|
49852
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
723 arg = arg(argname, annotation, c->c_arena); |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
724 if (!arg) |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
725 goto error; |
|
40529
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
40450
diff
changeset
|
726 asdl_seq_SET(kwonlyargs, j++, arg); |
|
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Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
727 i += 2; /* the name and the comma */ |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
728 break; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
729 case DOUBLESTAR: |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
730 return i; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
731 default: |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
732 ast_error(ch, "unexpected node"); |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
733 goto error; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
734 } |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
735 } |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
736 return i; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
737 error: |
|
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|
738 return -1; |
|
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Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
739 } |
| 35742 | 740 |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
741 /* Create AST for argument list. */ |
| 35742 | 742 |
| 743 static arguments_ty | |
| 744 ast_for_arguments(struct compiling *c, const node *n) | |
| 745 { | |
|
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PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
746 /* This function handles both typedargslist (function definition) |
|
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
747 and varargslist (lambda definition). |
|
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
748 |
|
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
749 parameters: '(' [typedargslist] ')' |
|
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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changeset
|
750 typedargslist: ((tfpdef ['=' test] ',')* |
|
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|
751 ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] |
|
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|
752 | '**' tfpdef) |
|
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parents:
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|
753 | tfpdef ['=' test] (',' tfpdef ['=' test])* [',']) |
|
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|
754 tfpdef: NAME [':' test] |
|
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parents:
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diff
changeset
|
755 varargslist: ((vfpdef ['=' test] ',')* |
|
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|
756 ('*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] |
|
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parents:
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changeset
|
757 | '**' vfpdef) |
|
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parents:
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|
758 | vfpdef ['=' test] (',' vfpdef ['=' test])* [',']) |
|
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|
759 vfpdef: NAME |
| 35742 | 760 */ |
|
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Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
761 int i, j, k, nposargs = 0, nkwonlyargs = 0; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
762 int nposdefaults = 0, found_default = 0; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
763 asdl_seq *posargs, *posdefaults, *kwonlyargs, *kwdefaults; |
| 35742 | 764 identifier vararg = NULL, kwarg = NULL; |
|
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parents:
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diff
changeset
|
765 arg_ty arg; |
|
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
766 expr_ty varargannotation = NULL, kwargannotation = NULL; |
| 35742 | 767 node *ch; |
| 768 | |
| 769 if (TYPE(n) == parameters) { | |
|
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parents:
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diff
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|
770 if (NCH(n) == 2) /* () as argument list */ |
|
40529
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PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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|
771 return arguments(NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
|
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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|
772 NULL, c->c_arena); |
|
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parents:
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|
773 n = CHILD(n, 1); |
| 35742 | 774 } |
|
40529
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PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
775 assert(TYPE(n) == typedargslist || TYPE(n) == varargslist); |
| 35742 | 776 |
|
48515
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
777 /* First count the number of positional args & defaults. The |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
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parents:
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diff
changeset
|
778 variable i is the loop index for this for loop and the next. |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
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parents:
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diff
changeset
|
779 The next loop picks up where the first leaves off. |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
780 */ |
| 35742 | 781 for (i = 0; i < NCH(n); i++) { |
|
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changeset
|
782 ch = CHILD(n, i); |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
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diff
changeset
|
783 if (TYPE(ch) == STAR) { |
|
48515
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
784 /* skip star */ |
|
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|
785 i++; |
|
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dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
786 if (i < NCH(n) && /* skip argument following star */ |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
48397
diff
changeset
|
787 (TYPE(CHILD(n, i)) == tfpdef || |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
788 TYPE(CHILD(n, i)) == vfpdef)) { |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
48397
diff
changeset
|
789 i++; |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
790 } |
|
dbc2b7ad0c22
Fix uninitialized memory read for cases like def(f, *): pass
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
791 break; |
|
40215
1cce0526d9b0
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Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
792 } |
|
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parents:
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diff
changeset
|
793 if (TYPE(ch) == DOUBLESTAR) break; |
|
40529
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
40450
diff
changeset
|
794 if (TYPE(ch) == vfpdef || TYPE(ch) == tfpdef) nposargs++; |
|
40215
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Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
795 if (TYPE(ch) == EQUAL) nposdefaults++; |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
796 } |
|
61467
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diff
changeset
|
797 /* count the number of keyword only args & |
|
40215
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
798 defaults for keyword only args */ |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
799 for ( ; i < NCH(n); ++i) { |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
800 ch = CHILD(n, i); |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
39783
diff
changeset
|
801 if (TYPE(ch) == DOUBLESTAR) break; |
|
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parents:
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diff
changeset
|
802 if (TYPE(ch) == tfpdef || TYPE(ch) == vfpdef) nkwonlyargs++; |
| 35742 | 803 } |
|
40215
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
804 posargs = (nposargs ? asdl_seq_new(nposargs, c->c_arena) : NULL); |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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|
805 if (!posargs && nposargs) |
|
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changeset
|
806 return NULL; |
|
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Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
807 kwonlyargs = (nkwonlyargs ? |
|
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Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
808 asdl_seq_new(nkwonlyargs, c->c_arena) : NULL); |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
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changeset
|
809 if (!kwonlyargs && nkwonlyargs) |
|
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|
810 return NULL; |
|
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changeset
|
811 posdefaults = (nposdefaults ? |
|
40215
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Jiwon Seo's PEP 3102 implementation.
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|
812 asdl_seq_new(nposdefaults, c->c_arena) : NULL); |
|
1cce0526d9b0
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changeset
|
813 if (!posdefaults && nposdefaults) |
|
64183
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|
814 return NULL; |
|
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changeset
|
815 /* The length of kwonlyargs and kwdefaults are same |
|
40215
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Jiwon Seo's PEP 3102 implementation.
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parents:
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diff
changeset
|
816 since we set NULL as default for keyword only argument w/o default |
|
1cce0526d9b0
Jiwon Seo's PEP 3102 implementation.
Guido van Rossum <guido@python.org>
parents:
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diff
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|
817 - we have sequence data structure, but no dictionary */ |
|
40529
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PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
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|
818 kwdefaults = (nkwonlyargs ? |
|
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|
819 asdl_seq_new(nkwonlyargs, c->c_arena) : NULL); |
|
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Jiwon Seo's PEP 3102 implementation.
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|
820 if (!kwdefaults && nkwonlyargs) |
|
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|
821 return NULL; |
|
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|
822 |
|
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parents:
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diff
changeset
|
823 if (nposargs + nkwonlyargs > 255) { |
|
40529
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parents:
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diff
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|
824 ast_error(n, "more than 255 arguments"); |
|
54cd47788811
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
825 return NULL; |
|
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|
826 } |
| 35742 | 827 |
|
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|
828 /* tfpdef: NAME [':' test] |
|
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changeset
|
829 vfpdef: NAME |
| 35742 | 830 */ |
| 831 i = 0; | |
|
36718
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Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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changeset
|
832 j = 0; /* index for defaults */ |
|
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
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changeset
|
833 k = 0; /* index for args */ |
| 35742 | 834 while (i < NCH(n)) { |
|
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|
835 ch = CHILD(n, i); |
|
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Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
836 switch (TYPE(ch)) { |
|
40529
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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changeset
|
837 case tfpdef: |
|
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838 case vfpdef: |
| 35742 | 839 /* XXX Need to worry about checking if TYPE(CHILD(n, i+1)) is |
| 840 anything other than EQUAL or a comma? */ | |
| 841 /* XXX Should NCH(n) check be made a separate check? */ | |
| 842 if (i + 1 < NCH(n) && TYPE(CHILD(n, i + 1)) == EQUAL) { | |
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843 expr_ty expression = ast_for_expr(c, CHILD(n, i + 2)); |
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846 assert(posdefaults != NULL); |
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847 asdl_seq_SET(posdefaults, j++, expression); |
| 35742 | 848 i += 2; |
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849 found_default = 1; |
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850 } |
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851 else if (found_default) { |
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852 ast_error(n, |
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853 "non-default argument follows default argument"); |
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854 return NULL; |
| 35742 | 855 } |
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856 arg = ast_for_arg(c, ch); |
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857 if (!arg) |
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858 return NULL; |
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859 asdl_seq_SET(posargs, k++, arg); |
| 35742 | 860 i += 2; /* the name and the comma */ |
| 861 break; | |
| 862 case STAR: | |
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863 if (i+1 >= NCH(n)) { |
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864 ast_error(CHILD(n, i), |
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865 "named arguments must follow bare *"); |
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866 return NULL; |
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867 } |
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868 ch = CHILD(n, i+1); /* tfpdef or COMMA */ |
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869 if (TYPE(ch) == COMMA) { |
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870 int res = 0; |
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871 i += 2; /* now follows keyword only arguments */ |
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872 res = handle_keywordonly_args(c, n, i, |
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873 kwonlyargs, kwdefaults); |
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874 if (res == -1) return NULL; |
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875 i = res; /* res has new position to process */ |
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876 } |
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877 else { |
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878 vararg = NEW_IDENTIFIER(CHILD(ch, 0)); |
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879 if (!vararg) |
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880 return NULL; |
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881 if (forbidden_name(vararg, CHILD(ch, 0), 0)) |
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882 return NULL; |
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883 if (NCH(ch) > 1) { |
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884 /* there is an annotation on the vararg */ |
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885 varargannotation = ast_for_expr(c, CHILD(ch, 2)); |
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886 if (!varargannotation) |
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887 return NULL; |
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888 } |
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889 i += 3; |
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890 if (i < NCH(n) && (TYPE(CHILD(n, i)) == tfpdef |
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891 || TYPE(CHILD(n, i)) == vfpdef)) { |
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892 int res = 0; |
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893 res = handle_keywordonly_args(c, n, i, |
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894 kwonlyargs, kwdefaults); |
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895 if (res == -1) return NULL; |
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896 i = res; /* res has new position to process */ |
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897 } |
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898 } |
| 35742 | 899 break; |
| 900 case DOUBLESTAR: | |
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901 ch = CHILD(n, i+1); /* tfpdef */ |
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902 assert(TYPE(ch) == tfpdef || TYPE(ch) == vfpdef); |
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903 kwarg = NEW_IDENTIFIER(CHILD(ch, 0)); |
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904 if (!kwarg) |
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905 return NULL; |
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906 if (NCH(ch) > 1) { |
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907 /* there is an annotation on the kwarg */ |
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908 kwargannotation = ast_for_expr(c, CHILD(ch, 2)); |
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909 if (!kwargannotation) |
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910 return NULL; |
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911 } |
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912 if (forbidden_name(kwarg, CHILD(ch, 0), 0)) |
|
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913 return NULL; |
| 35742 | 914 i += 3; |
| 915 break; | |
| 916 default: | |
|
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917 PyErr_Format(PyExc_SystemError, |
| 35742 | 918 "unexpected node in varargslist: %d @ %d", |
| 919 TYPE(ch), i); | |
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920 return NULL; |
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921 } |
| 35742 | 922 } |
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923 return arguments(posargs, vararg, varargannotation, kwonlyargs, kwarg, |
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924 kwargannotation, posdefaults, kwdefaults, c->c_arena); |
| 35742 | 925 } |
| 926 | |
| 927 static expr_ty | |
| 928 ast_for_dotted_name(struct compiling *c, const node *n) | |
| 929 { | |
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930 expr_ty e; |
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931 identifier id; |
|
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932 int lineno, col_offset; |
| 35742 | 933 int i; |
| 934 | |
| 935 REQ(n, dotted_name); | |
|
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936 |
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937 lineno = LINENO(n); |
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938 col_offset = n->n_col_offset; |
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939 |
| 35742 | 940 id = NEW_IDENTIFIER(CHILD(n, 0)); |
| 941 if (!id) | |
|
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942 return NULL; |
|
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943 e = Name(id, Load, lineno, col_offset, c->c_arena); |
| 35742 | 944 if (!e) |
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945 return NULL; |
| 35742 | 946 |
| 947 for (i = 2; i < NCH(n); i+=2) { | |
| 948 id = NEW_IDENTIFIER(CHILD(n, i)); | |
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949 if (!id) |
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950 return NULL; |
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951 e = Attribute(e, id, Load, lineno, col_offset, c->c_arena); |
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952 if (!e) |
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953 return NULL; |
| 35742 | 954 } |
| 955 | |
| 956 return e; | |
| 957 } | |
| 958 | |
| 959 static expr_ty | |
| 960 ast_for_decorator(struct compiling *c, const node *n) | |
| 961 { | |
| 962 /* decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE */ | |
| 963 expr_ty d = NULL; | |
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964 expr_ty name_expr; |
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965 |
| 35742 | 966 REQ(n, decorator); |
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967 REQ(CHILD(n, 0), AT); |
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968 REQ(RCHILD(n, -1), NEWLINE); |
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969 |
| 35742 | 970 name_expr = ast_for_dotted_name(c, CHILD(n, 1)); |
| 971 if (!name_expr) | |
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972 return NULL; |
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973 |
| 35742 | 974 if (NCH(n) == 3) { /* No arguments */ |
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975 d = name_expr; |
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976 name_expr = NULL; |
| 35742 | 977 } |
| 978 else if (NCH(n) == 5) { /* Call with no arguments */ | |
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979 d = Call(name_expr, NULL, NULL, NULL, NULL, LINENO(n), |
|
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980 n->n_col_offset, c->c_arena); |
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981 if (!d) |
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982 return NULL; |
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983 name_expr = NULL; |
| 35742 | 984 } |
| 985 else { | |
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986 d = ast_for_call(c, CHILD(n, 3), name_expr); |
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987 if (!d) |
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988 return NULL; |
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989 name_expr = NULL; |
| 35742 | 990 } |
| 991 | |
| 992 return d; | |
| 993 } | |
| 994 | |
| 995 static asdl_seq* | |
| 996 ast_for_decorators(struct compiling *c, const node *n) | |
| 997 { | |
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998 asdl_seq* decorator_seq; |
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999 expr_ty d; |
| 35742 | 1000 int i; |
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1001 |
| 35742 | 1002 REQ(n, decorators); |
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1003 decorator_seq = asdl_seq_new(NCH(n), c->c_arena); |
| 35742 | 1004 if (!decorator_seq) |
| 1005 return NULL; | |
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1006 |
| 35742 | 1007 for (i = 0; i < NCH(n); i++) { |
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1008 d = ast_for_decorator(c, CHILD(n, i)); |
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1009 if (!d) |
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1010 return NULL; |
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1011 asdl_seq_SET(decorator_seq, i, d); |
| 35742 | 1012 } |
| 1013 return decorator_seq; | |
| 1014 } | |
| 1015 | |
| 1016 static stmt_ty | |
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1017 ast_for_funcdef(struct compiling *c, const node *n, asdl_seq *decorator_seq) |
| 35742 | 1018 { |
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1019 /* funcdef: 'def' NAME parameters ['->' test] ':' suite */ |
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1020 identifier name; |
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1021 arguments_ty args; |
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1022 asdl_seq *body; |
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1023 expr_ty returns = NULL; |
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1024 int name_i = 1; |
| 35742 | 1025 |
| 1026 REQ(n, funcdef); | |
| 1027 | |
| 1028 name = NEW_IDENTIFIER(CHILD(n, name_i)); | |
| 1029 if (!name) | |
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1030 return NULL; |
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1031 if (forbidden_name(name, CHILD(n, name_i), 0)) |
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1032 return NULL; |
| 35742 | 1033 args = ast_for_arguments(c, CHILD(n, name_i + 1)); |
| 1034 if (!args) | |
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1035 return NULL; |
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1036 if (TYPE(CHILD(n, name_i+2)) == RARROW) { |
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1037 returns = ast_for_expr(c, CHILD(n, name_i + 3)); |
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1038 if (!returns) |
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1039 return NULL; |
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1040 name_i += 2; |
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1041 } |
| 35742 | 1042 body = ast_for_suite(c, CHILD(n, name_i + 3)); |
| 1043 if (!body) | |
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1044 return NULL; |
| 35742 | 1045 |
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1046 return FunctionDef(name, args, body, decorator_seq, returns, LINENO(n), |
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1047 n->n_col_offset, c->c_arena); |
| 35742 | 1048 } |
| 1049 | |
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1050 static stmt_ty |
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1051 ast_for_decorated(struct compiling *c, const node *n) |
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1052 { |
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1053 /* decorated: decorators (classdef | funcdef) */ |
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1054 stmt_ty thing = NULL; |
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1055 asdl_seq *decorator_seq = NULL; |
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1056 |
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1057 REQ(n, decorated); |
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1058 |
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1059 decorator_seq = ast_for_decorators(c, CHILD(n, 0)); |
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1060 if (!decorator_seq) |
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1061 return NULL; |
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1062 |
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1063 assert(TYPE(CHILD(n, 1)) == funcdef || |
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1064 TYPE(CHILD(n, 1)) == classdef); |
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1065 |
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1066 if (TYPE(CHILD(n, 1)) == funcdef) { |
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1067 thing = ast_for_funcdef(c, CHILD(n, 1), decorator_seq); |
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1068 } else if (TYPE(CHILD(n, 1)) == classdef) { |
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1069 thing = ast_for_classdef(c, CHILD(n, 1), decorator_seq); |
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1070 } |
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1071 /* we count the decorators in when talking about the class' or |
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1072 * function's line number */ |
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1073 if (thing) { |
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1074 thing->lineno = LINENO(n); |
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1075 thing->col_offset = n->n_col_offset; |
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1076 } |
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1077 return thing; |
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1078 } |
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1079 |
| 35742 | 1080 static expr_ty |
| 1081 ast_for_lambdef(struct compiling *c, const node *n) | |
| 1082 { | |
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1083 /* lambdef: 'lambda' [varargslist] ':' test |
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1084 lambdef_nocond: 'lambda' [varargslist] ':' test_nocond */ |
| 35742 | 1085 arguments_ty args; |
| 1086 expr_ty expression; | |
| 1087 | |
| 1088 if (NCH(n) == 3) { | |
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1089 args = arguments(NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
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1090 NULL, c->c_arena); |
| 35742 | 1091 if (!args) |
| 1092 return NULL; | |
| 1093 expression = ast_for_expr(c, CHILD(n, 2)); | |
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1094 if (!expression) |
| 35742 | 1095 return NULL; |
| 1096 } | |
| 1097 else { | |
| 1098 args = ast_for_arguments(c, CHILD(n, 1)); | |
| 1099 if (!args) | |
| 1100 return NULL; | |
| 1101 expression = ast_for_expr(c, CHILD(n, 3)); | |
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1102 if (!expression) |
| 35742 | 1103 return NULL; |
| 1104 } | |
| 1105 | |
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1106 return Lambda(args, expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1107 } |
| 1108 | |
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1109 static expr_ty |
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1110 ast_for_ifexpr(struct compiling *c, const node *n) |
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1111 { |
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1112 /* test: or_test 'if' or_test 'else' test */ |
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1113 expr_ty expression, body, orelse; |
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1114 |
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1115 assert(NCH(n) == 5); |
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1116 body = ast_for_expr(c, CHILD(n, 0)); |
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1117 if (!body) |
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1118 return NULL; |
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1119 expression = ast_for_expr(c, CHILD(n, 2)); |
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1120 if (!expression) |
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1121 return NULL; |
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1122 orelse = ast_for_expr(c, CHILD(n, 4)); |
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1123 if (!orelse) |
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1124 return NULL; |
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1125 return IfExp(expression, body, orelse, LINENO(n), n->n_col_offset, |
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1126 c->c_arena); |
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1127 } |
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1128 |
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1129 /* |
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1130 Count the number of 'for' loops in a comprehension. |
| 35742 | 1131 |
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1132 Helper for ast_for_comprehension(). |
| 35742 | 1133 */ |
| 1134 | |
| 1135 static int | |
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|
1136 count_comp_fors(struct compiling *c, const node *n) |
| 35742 | 1137 { |
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1138 int n_fors = 0; |
| 35742 | 1139 |
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1140 count_comp_for: |
|
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1141 n_fors++; |
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1142 REQ(n, comp_for); |
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1143 if (NCH(n) == 5) |
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1144 n = CHILD(n, 4); |
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1145 else |
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1146 return n_fors; |
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1147 count_comp_iter: |
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1148 REQ(n, comp_iter); |
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1149 n = CHILD(n, 0); |
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1150 if (TYPE(n) == comp_for) |
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1151 goto count_comp_for; |
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1152 else if (TYPE(n) == comp_if) { |
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1153 if (NCH(n) == 3) { |
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1154 n = CHILD(n, 2); |
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1155 goto count_comp_iter; |
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1156 } |
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1157 else |
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1158 return n_fors; |
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1159 } |
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1160 |
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1161 /* Should never be reached */ |
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1162 PyErr_SetString(PyExc_SystemError, |
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1163 "logic error in count_comp_fors"); |
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1164 return -1; |
| 35742 | 1165 } |
| 1166 | |
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1167 /* Count the number of 'if' statements in a comprehension. |
| 35742 | 1168 |
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1169 Helper for ast_for_comprehension(). |
| 35742 | 1170 */ |
| 1171 | |
| 1172 static int | |
|
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1173 count_comp_ifs(struct compiling *c, const node *n) |
| 35742 | 1174 { |
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1175 int n_ifs = 0; |
| 35742 | 1176 |
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1177 while (1) { |
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1178 REQ(n, comp_iter); |
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1179 if (TYPE(CHILD(n, 0)) == comp_for) |
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1180 return n_ifs; |
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1181 n = CHILD(n, 0); |
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1182 REQ(n, comp_if); |
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1183 n_ifs++; |
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1184 if (NCH(n) == 2) |
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1185 return n_ifs; |
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1186 n = CHILD(n, 2); |
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1187 } |
| 35742 | 1188 } |
| 1189 | |
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1190 static asdl_seq * |
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1191 ast_for_comprehension(struct compiling *c, const node *n) |
| 35742 | 1192 { |
| 1193 int i, n_fors; | |
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1194 asdl_seq *comps; |
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1195 |
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1196 n_fors = count_comp_fors(c, n); |
| 35742 | 1197 if (n_fors == -1) |
| 1198 return NULL; | |
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1199 |
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1200 comps = asdl_seq_new(n_fors, c->c_arena); |
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1201 if (!comps) |
| 35742 | 1202 return NULL; |
|
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1203 |
| 35742 | 1204 for (i = 0; i < n_fors; i++) { |
|
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1205 comprehension_ty comp; |
| 35742 | 1206 asdl_seq *t; |
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1207 expr_ty expression, first; |
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1208 node *for_ch; |
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1209 |
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1210 REQ(n, comp_for); |
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1211 |
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1212 for_ch = CHILD(n, 1); |
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1213 t = ast_for_exprlist(c, for_ch, Store); |
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1214 if (!t) |
| 35742 | 1215 return NULL; |
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1216 expression = ast_for_expr(c, CHILD(n, 3)); |
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1217 if (!expression) |
| 35742 | 1218 return NULL; |
|
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1219 |
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1220 /* Check the # of children rather than the length of t, since |
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1221 (x for x, in ...) has 1 element in t, but still requires a Tuple. */ |
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1222 first = (expr_ty)asdl_seq_GET(t, 0); |
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1223 if (NCH(for_ch) == 1) |
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1224 comp = comprehension(first, expression, NULL, c->c_arena); |
| 35742 | 1225 else |
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1226 comp = comprehension(Tuple(t, Store, first->lineno, first->col_offset, |
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1227 c->c_arena), |
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1228 expression, NULL, c->c_arena); |
|
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1229 if (!comp) |
| 35742 | 1230 return NULL; |
|
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1231 |
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1232 if (NCH(n) == 5) { |
| 35742 | 1233 int j, n_ifs; |
| 1234 asdl_seq *ifs; | |
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1235 |
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1236 n = CHILD(n, 4); |
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1237 n_ifs = count_comp_ifs(c, n); |
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1238 if (n_ifs == -1) |
| 35742 | 1239 return NULL; |
|
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1240 |
|
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1241 ifs = asdl_seq_new(n_ifs, c->c_arena); |
|
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1242 if (!ifs) |
| 35742 | 1243 return NULL; |
|
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1244 |
| 35742 | 1245 for (j = 0; j < n_ifs; j++) { |
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1246 REQ(n, comp_iter); |
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1247 n = CHILD(n, 0); |
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1248 REQ(n, comp_if); |
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1249 |
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1250 expression = ast_for_expr(c, CHILD(n, 1)); |
|
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1251 if (!expression) |
|
35798
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
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1252 return NULL; |
|
36718
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Remove asdl_seq_APPEND() and simplify asdl seq implementation.
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1253 asdl_seq_SET(ifs, j, expression); |
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1254 if (NCH(n) == 3) |
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1255 n = CHILD(n, 2); |
| 35742 | 1256 } |
|
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1257 /* on exit, must guarantee that n is a comp_for */ |
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1258 if (TYPE(n) == comp_iter) |
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1259 n = CHILD(n, 0); |
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1260 comp->ifs = ifs; |
| 35742 | 1261 } |
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1262 asdl_seq_SET(comps, i, comp); |
| 35742 | 1263 } |
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1264 return comps; |
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1265 } |
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1266 |
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1267 static expr_ty |
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1268 ast_for_itercomp(struct compiling *c, const node *n, int type) |
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1269 { |
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1270 /* testlist_comp: test ( comp_for | (',' test)* [','] ) |
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1271 argument: [test '='] test [comp_for] # Really [keyword '='] test */ |
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1272 expr_ty elt; |
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1273 asdl_seq *comps; |
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1274 |
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1275 assert(NCH(n) > 1); |
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1276 |
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1277 elt = ast_for_expr(c, CHILD(n, 0)); |
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1278 if (!elt) |
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1279 return NULL; |
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1280 |
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1281 comps = ast_for_comprehension(c, CHILD(n, 1)); |
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1282 if (!comps) |
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1283 return NULL; |
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1284 |
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1285 if (type == COMP_GENEXP) |
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1286 return GeneratorExp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1287 else if (type == COMP_LISTCOMP) |
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1288 return ListComp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1289 else if (type == COMP_SETCOMP) |
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1290 return SetComp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1291 else |
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1292 /* Should never happen */ |
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1293 return NULL; |
| 35742 | 1294 } |
| 1295 | |
| 1296 static expr_ty | |
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1297 ast_for_dictcomp(struct compiling *c, const node *n) |
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1298 { |
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1299 expr_ty key, value; |
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1300 asdl_seq *comps; |
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1301 |
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1302 assert(NCH(n) > 3); |
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1303 REQ(CHILD(n, 1), COLON); |
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1304 |
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1305 key = ast_for_expr(c, CHILD(n, 0)); |
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1306 if (!key) |
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1307 return NULL; |
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1308 value = ast_for_expr(c, CHILD(n, 2)); |
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1309 if (!value) |
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1310 return NULL; |
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1311 |
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1312 comps = ast_for_comprehension(c, CHILD(n, 3)); |
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1313 if (!comps) |
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1314 return NULL; |
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1315 |
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1316 return DictComp(key, value, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1317 } |
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1318 |
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1319 static expr_ty |
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1320 ast_for_genexp(struct compiling *c, const node *n) |
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1321 { |
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1322 assert(TYPE(n) == (testlist_comp) || TYPE(n) == (argument)); |
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1323 return ast_for_itercomp(c, n, COMP_GENEXP); |
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1324 } |
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1325 |
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1326 static expr_ty |
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1327 ast_for_listcomp(struct compiling *c, const node *n) |
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1328 { |
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1329 assert(TYPE(n) == (testlist_comp)); |
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1330 return ast_for_itercomp(c, n, COMP_LISTCOMP); |
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1331 } |
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1332 |
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1333 static expr_ty |
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1334 ast_for_setcomp(struct compiling *c, const node *n) |
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1335 { |
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1336 assert(TYPE(n) == (dictorsetmaker)); |
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1337 return ast_for_itercomp(c, n, COMP_SETCOMP); |
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1338 } |
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1339 |
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1340 |
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1341 static expr_ty |
| 35742 | 1342 ast_for_atom(struct compiling *c, const node *n) |
| 1343 { | |
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1344 /* atom: '(' [yield_expr|testlist_comp] ')' | '[' [testlist_comp] ']' |
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1345 | '{' [dictmaker|testlist_comp] '}' | NAME | NUMBER | STRING+ |
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1346 | '...' | 'None' | 'True' | 'False' |
| 35742 | 1347 */ |
| 1348 node *ch = CHILD(n, 0); | |
| 40894 | 1349 int bytesmode = 0; |
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1350 |
| 35742 | 1351 switch (TYPE(ch)) { |
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1352 case NAME: { |
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1353 /* All names start in Load context, but may later be |
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1354 changed. */ |
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1355 PyObject *name = NEW_IDENTIFIER(ch); |
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1356 if (!name) |
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1357 return NULL; |
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1358 return Name(name, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1359 } |
| 35742 | 1360 case STRING: { |
| 40894 | 1361 PyObject *str = parsestrplus(c, n, &bytesmode); |
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1362 if (!str) { |
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1363 if (PyErr_ExceptionMatches(PyExc_UnicodeError)) { |
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1364 PyObject *type, *value, *tback, *errstr; |
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1365 PyErr_Fetch(&type, &value, &tback); |
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1366 errstr = PyObject_Str(value); |
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1367 if (errstr) { |
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1368 char *s = ""; |
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1369 char buf[128]; |
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1370 s = _PyUnicode_AsString(errstr); |
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1371 PyOS_snprintf(buf, sizeof(buf), "(unicode error) %s", s); |
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1372 ast_error(n, buf); |
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1373 Py_DECREF(errstr); |
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1374 } else { |
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1375 ast_error(n, "(unicode error) unknown error"); |
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1376 } |
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|
1377 Py_DECREF(type); |
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|
1378 Py_DECREF(value); |
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1379 Py_XDECREF(tback); |
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1380 } |
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1381 return NULL; |
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1382 } |
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1383 PyArena_AddPyObject(c->c_arena, str); |
| 40894 | 1384 if (bytesmode) |
| 1385 return Bytes(str, LINENO(n), n->n_col_offset, c->c_arena); | |
| 1386 else | |
| 1387 return Str(str, LINENO(n), n->n_col_offset, c->c_arena); | |
| 35742 | 1388 } |
| 1389 case NUMBER: { | |
|
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1390 PyObject *pynum = parsenumber(c, STR(ch)); |
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1391 if (!pynum) |
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1392 return NULL; |
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1393 |
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1394 PyArena_AddPyObject(c->c_arena, pynum); |
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1395 return Num(pynum, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1396 } |
|
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1397 case ELLIPSIS: /* Ellipsis */ |
|
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1398 return Ellipsis(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1399 case LPAR: /* some parenthesized expressions */ |
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1400 ch = CHILD(n, 1); |
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1401 |
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1402 if (TYPE(ch) == RPAR) |
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1403 return Tuple(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1404 |
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1405 if (TYPE(ch) == yield_expr) |
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1406 return ast_for_expr(c, ch); |
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1407 |
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1408 /* testlist_comp: test ( comp_for | (',' test)* [','] ) */ |
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1409 if ((NCH(ch) > 1) && (TYPE(CHILD(ch, 1)) == comp_for)) |
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1410 return ast_for_genexp(c, ch); |
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1411 |
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1412 return ast_for_testlist(c, ch); |
| 35742 | 1413 case LSQB: /* list (or list comprehension) */ |
|
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1414 ch = CHILD(n, 1); |
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1415 |
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1416 if (TYPE(ch) == RSQB) |
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1417 return List(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1418 |
|
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1419 REQ(ch, testlist_comp); |
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1420 if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) { |
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1421 asdl_seq *elts = seq_for_testlist(c, ch); |
|
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1422 if (!elts) |
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|
1423 return NULL; |
|
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|
1424 |
|
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1425 return List(elts, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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1426 } |
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1427 else |
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1428 return ast_for_listcomp(c, ch); |
| 35742 | 1429 case LBRACE: { |
|
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1430 /* dictorsetmaker: test ':' test (',' test ':' test)* [','] | |
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1431 * test (gen_for | (',' test)* [',']) */ |
|
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1432 int i, size; |
|
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|
1433 asdl_seq *keys, *values; |
|
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1434 |
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1435 ch = CHILD(n, 1); |
|
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1436 if (TYPE(ch) == RBRACE) { |
|
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|
1437 /* it's an empty dict */ |
|
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|
1438 return Dict(NULL, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
|
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1439 } else if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) { |
|
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|
1440 /* it's a simple set */ |
|
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|
1441 asdl_seq *elts; |
|
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1442 size = (NCH(ch) + 1) / 2; /* +1 in case no trailing comma */ |
|
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1443 elts = asdl_seq_new(size, c->c_arena); |
|
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|
1444 if (!elts) |
|
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|
1445 return NULL; |
|
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|
1446 for (i = 0; i < NCH(ch); i += 2) { |
|
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|
1447 expr_ty expression; |
|
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|
1448 expression = ast_for_expr(c, CHILD(ch, i)); |
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|
1449 if (!expression) |
|
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|
1450 return NULL; |
|
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|
1451 asdl_seq_SET(elts, i / 2, expression); |
|
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|
1452 } |
|
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|
1453 return Set(elts, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1454 } else if (TYPE(CHILD(ch, 1)) == comp_for) { |
|
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|
1455 /* it's a set comprehension */ |
|
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|
1456 return ast_for_setcomp(c, ch); |
|
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|
1457 } else if (NCH(ch) > 3 && TYPE(CHILD(ch, 3)) == comp_for) { |
|
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|
1458 return ast_for_dictcomp(c, ch); |
|
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|
1459 } else { |
|
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|
1460 /* it's a dict */ |
|
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|
1461 size = (NCH(ch) + 1) / 4; /* +1 in case no trailing comma */ |
|
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diff
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|
1462 keys = asdl_seq_new(size, c->c_arena); |
|
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|
1463 if (!keys) |
|
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|
1464 return NULL; |
|
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|
1465 |
|
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|
1466 values = asdl_seq_new(size, c->c_arena); |
|
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|
1467 if (!values) |
|
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|
1468 return NULL; |
|
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|
1469 |
|
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|
1470 for (i = 0; i < NCH(ch); i += 4) { |
|
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|
1471 expr_ty expression; |
|
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|
1472 |
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|
1473 expression = ast_for_expr(c, CHILD(ch, i)); |
|
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|
1474 if (!expression) |
|
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|
1475 return NULL; |
|
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|
1476 |
|
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|
1477 asdl_seq_SET(keys, i / 4, expression); |
|
35873
76ed7fdc9d85
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changeset
|
1478 |
|
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|
1479 expression = ast_for_expr(c, CHILD(ch, i + 2)); |
|
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|
1480 if (!expression) |
|
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|
1481 return NULL; |
|
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|
1482 |
|
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diff
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|
1483 asdl_seq_SET(values, i / 4, expression); |
|
d0b83c4630c0
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diff
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|
1484 } |
|
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|
1485 return Dict(keys, values, LINENO(n), n->n_col_offset, c->c_arena); |
|
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diff
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|
1486 } |
| 35742 | 1487 } |
| 1488 default: | |
|
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|
1489 PyErr_Format(PyExc_SystemError, "unhandled atom %d", TYPE(ch)); |
|
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|
1490 return NULL; |
| 35742 | 1491 } |
| 1492 } | |
| 1493 | |
| 1494 static slice_ty | |
| 1495 ast_for_slice(struct compiling *c, const node *n) | |
| 1496 { | |
| 1497 node *ch; | |
| 1498 expr_ty lower = NULL, upper = NULL, step = NULL; | |
| 1499 | |
| 1500 REQ(n, subscript); | |
| 1501 | |
| 1502 /* | |
|
39783
7a0ad110e91e
Patch #1550786: ellipsis literal.
Georg Brandl <georg@python.org>
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changeset
|
1503 subscript: test | [test] ':' [test] [sliceop] |
| 35742 | 1504 sliceop: ':' [test] |
| 1505 */ | |
| 1506 ch = CHILD(n, 0); | |
| 1507 if (NCH(n) == 1 && TYPE(ch) == test) { | |
| 1508 /* 'step' variable hold no significance in terms of being used over | |
| 1509 other vars */ | |
|
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|
1510 step = ast_for_expr(c, ch); |
| 35742 | 1511 if (!step) |
| 1512 return NULL; | |
|
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|
1513 |
|
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|
1514 return Index(step, c->c_arena); |
| 35742 | 1515 } |
| 1516 | |
| 1517 if (TYPE(ch) == test) { | |
|
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|
1518 lower = ast_for_expr(c, ch); |
| 35742 | 1519 if (!lower) |
| 1520 return NULL; | |
| 1521 } | |
| 1522 | |
| 1523 /* If there's an upper bound it's in the second or third position. */ | |
| 1524 if (TYPE(ch) == COLON) { | |
|
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|
1525 if (NCH(n) > 1) { |
|
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|
1526 node *n2 = CHILD(n, 1); |
| 35742 | 1527 |
|
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|
1528 if (TYPE(n2) == test) { |
|
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|
1529 upper = ast_for_expr(c, n2); |
| 35742 | 1530 if (!upper) |
| 1531 return NULL; | |
| 1532 } | |
|
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|
1533 } |
| 35742 | 1534 } else if (NCH(n) > 2) { |
|
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|
1535 node *n2 = CHILD(n, 2); |
| 35742 | 1536 |
|
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|
1537 if (TYPE(n2) == test) { |
|
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|
1538 upper = ast_for_expr(c, n2); |
| 35742 | 1539 if (!upper) |
| 1540 return NULL; | |
| 1541 } | |
| 1542 } | |
| 1543 | |
| 1544 ch = CHILD(n, NCH(n) - 1); | |
| 1545 if (TYPE(ch) == sliceop) { | |
|
54918
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|
1546 if (NCH(ch) != 1) { |
|
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|
1547 ch = CHILD(ch, 1); |
|
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|
1548 if (TYPE(ch) == test) { |
|
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|
1549 step = ast_for_expr(c, ch); |
|
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|
1550 if (!step) |
|
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|
1551 return NULL; |
|
f731859e9b3b
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|
1552 } |
| 35742 | 1553 } |
| 1554 } | |
| 1555 | |
|
36065
ea083efdc96c
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|
1556 return Slice(lower, upper, step, c->c_arena); |
| 35742 | 1557 } |
| 1558 | |
| 1559 static expr_ty | |
| 1560 ast_for_binop(struct compiling *c, const node *n) | |
| 1561 { | |
|
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|
1562 /* Must account for a sequence of expressions. |
|
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|
1563 How should A op B op C by represented? |
|
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|
1564 BinOp(BinOp(A, op, B), op, C). |
|
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|
1565 */ |
| 35742 | 1566 |
|
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|
1567 int i, nops; |
|
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|
1568 expr_ty expr1, expr2, result; |
|
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|
1569 operator_ty newoperator; |
|
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|
1570 |
|
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1571 expr1 = ast_for_expr(c, CHILD(n, 0)); |
|
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|
1572 if (!expr1) |
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|
1573 return NULL; |
| 35742 | 1574 |
|
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|
1575 expr2 = ast_for_expr(c, CHILD(n, 2)); |
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|
1576 if (!expr2) |
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|
1577 return NULL; |
|
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|
1578 |
|
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|
1579 newoperator = get_operator(CHILD(n, 1)); |
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|
1580 if (!newoperator) |
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|
1581 return NULL; |
| 35742 | 1582 |
|
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1583 result = BinOp(expr1, newoperator, expr2, LINENO(n), n->n_col_offset, |
|
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1584 c->c_arena); |
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1585 if (!result) |
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|
1586 return NULL; |
| 35742 | 1587 |
|
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|
1588 nops = (NCH(n) - 1) / 2; |
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|
1589 for (i = 1; i < nops; i++) { |
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|
1590 expr_ty tmp_result, tmp; |
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|
1591 const node* next_oper = CHILD(n, i * 2 + 1); |
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1592 |
|
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1593 newoperator = get_operator(next_oper); |
|
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1594 if (!newoperator) |
| 35742 | 1595 return NULL; |
| 1596 | |
|
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|
1597 tmp = ast_for_expr(c, CHILD(n, i * 2 + 2)); |
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|
1598 if (!tmp) |
| 35742 | 1599 return NULL; |
| 1600 | |
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1601 tmp_result = BinOp(result, newoperator, tmp, |
|
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1602 LINENO(next_oper), next_oper->n_col_offset, |
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1603 c->c_arena); |
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1604 if (!tmp_result) |
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1605 return NULL; |
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1606 result = tmp_result; |
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1607 } |
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|
1608 return result; |
| 35742 | 1609 } |
| 1610 | |
|
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|
1611 static expr_ty |
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|
1612 ast_for_trailer(struct compiling *c, const node *n, expr_ty left_expr) |
|
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1613 { |
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1614 /* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
|
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|
1615 subscriptlist: subscript (',' subscript)* [','] |
|
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|
1616 subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop] |
|
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1617 */ |
|
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|
1618 REQ(n, trailer); |
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|
1619 if (TYPE(CHILD(n, 0)) == LPAR) { |
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1620 if (NCH(n) == 2) |
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1621 return Call(left_expr, NULL, NULL, NULL, NULL, LINENO(n), |
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1622 n->n_col_offset, c->c_arena); |
|
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1623 else |
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1624 return ast_for_call(c, CHILD(n, 1), left_expr); |
|
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1625 } |
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1626 else if (TYPE(CHILD(n, 0)) == DOT ) { |
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1627 PyObject *attr_id = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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1628 if (!attr_id) |
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1629 return NULL; |
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1630 return Attribute(left_expr, attr_id, Load, |
|
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|
1631 LINENO(n), n->n_col_offset, c->c_arena); |
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1632 } |
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1633 else { |
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1634 REQ(CHILD(n, 0), LSQB); |
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1635 REQ(CHILD(n, 2), RSQB); |
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1636 n = CHILD(n, 1); |
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1637 if (NCH(n) == 1) { |
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|
1638 slice_ty slc = ast_for_slice(c, CHILD(n, 0)); |
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|
1639 if (!slc) |
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1640 return NULL; |
|
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1641 return Subscript(left_expr, slc, Load, LINENO(n), n->n_col_offset, |
|
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|
1642 c->c_arena); |
|
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|
1643 } |
|
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|
1644 else { |
|
61467
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diff
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|
1645 /* The grammar is ambiguous here. The ambiguity is resolved |
|
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|
1646 by treating the sequence as a tuple literal if there are |
|
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|
1647 no slice features. |
|
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|
1648 */ |
|
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|
1649 int j; |
|
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|
1650 slice_ty slc; |
|
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|
1651 expr_ty e; |
|
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|
1652 int simple = 1; |
|
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|
1653 asdl_seq *slices, *elts; |
|
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|
1654 slices = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
|
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|
1655 if (!slices) |
|
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|
1656 return NULL; |
|
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|
1657 for (j = 0; j < NCH(n); j += 2) { |
|
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|
1658 slc = ast_for_slice(c, CHILD(n, j)); |
|
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|
1659 if (!slc) |
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|
1660 return NULL; |
|
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|
1661 if (slc->kind != Index_kind) |
|
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|
1662 simple = 0; |
|
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|
1663 asdl_seq_SET(slices, j / 2, slc); |
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|
1664 } |
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|
1665 if (!simple) { |
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|
1666 return Subscript(left_expr, ExtSlice(slices, c->c_arena), |
|
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|
1667 Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1668 } |
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1669 /* extract Index values and put them in a Tuple */ |
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|
1670 elts = asdl_seq_new(asdl_seq_LEN(slices), c->c_arena); |
|
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|
1671 if (!elts) |
|
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1672 return NULL; |
|
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|
1673 for (j = 0; j < asdl_seq_LEN(slices); ++j) { |
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|
1674 slc = (slice_ty)asdl_seq_GET(slices, j); |
|
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|
1675 assert(slc->kind == Index_kind && slc->v.Index.value); |
|
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|
1676 asdl_seq_SET(elts, j, slc->v.Index.value); |
|
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|
1677 } |
|
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|
1678 e = Tuple(elts, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1679 if (!e) |
|
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|
1680 return NULL; |
|
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|
1681 return Subscript(left_expr, Index(e, c->c_arena), |
|
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|
1682 Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1683 } |
|
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|
1684 } |
|
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|
1685 } |
|
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1686 |
|
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|
1687 static expr_ty |
|
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|
1688 ast_for_factor(struct compiling *c, const node *n) |
|
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1689 { |
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|
1690 expr_ty expression; |
|
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1691 |
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|
1692 expression = ast_for_expr(c, CHILD(n, 1)); |
|
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|
1693 if (!expression) |
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1694 return NULL; |
|
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1695 |
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|
1696 switch (TYPE(CHILD(n, 0))) { |
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|
1697 case PLUS: |
|
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1698 return UnaryOp(UAdd, expression, LINENO(n), n->n_col_offset, |
|
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|
1699 c->c_arena); |
|
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1700 case MINUS: |
|
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1701 return UnaryOp(USub, expression, LINENO(n), n->n_col_offset, |
|
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|
1702 c->c_arena); |
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|
1703 case TILDE: |
|
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|
1704 return UnaryOp(Invert, expression, LINENO(n), |
|
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|
1705 n->n_col_offset, c->c_arena); |
|
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1706 } |
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|
1707 PyErr_Format(PyExc_SystemError, "unhandled factor: %d", |
|
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|
1708 TYPE(CHILD(n, 0))); |
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|
1709 return NULL; |
|
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1710 } |
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1711 |
|
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|
1712 static expr_ty |
|
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|
1713 ast_for_power(struct compiling *c, const node *n) |
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1714 { |
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|
1715 /* power: atom trailer* ('**' factor)* |
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|
1716 */ |
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|
1717 int i; |
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|
1718 expr_ty e, tmp; |
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|
1719 REQ(n, power); |
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|
1720 e = ast_for_atom(c, CHILD(n, 0)); |
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|
1721 if (!e) |
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|
1722 return NULL; |
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|
1723 if (NCH(n) == 1) |
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1724 return e; |
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|
1725 for (i = 1; i < NCH(n); i++) { |
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|
1726 node *ch = CHILD(n, i); |
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|
1727 if (TYPE(ch) != trailer) |
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|
1728 break; |
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|
1729 tmp = ast_for_trailer(c, ch, e); |
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1730 if (!tmp) |
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1731 return NULL; |
|
40450
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|
1732 tmp->lineno = e->lineno; |
|
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1733 tmp->col_offset = e->col_offset; |
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|
1734 e = tmp; |
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|
1735 } |
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|
1736 if (TYPE(CHILD(n, NCH(n) - 1)) == factor) { |
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|
1737 expr_ty f = ast_for_expr(c, CHILD(n, NCH(n) - 1)); |
|
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1738 if (!f) |
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|
1739 return NULL; |
|
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|
1740 tmp = BinOp(e, Pow, f, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1741 if (!tmp) |
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|
1742 return NULL; |
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|
1743 e = tmp; |
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1744 } |
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|
1745 return e; |
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1746 } |
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|
1747 |
|
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1748 static expr_ty |
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1749 ast_for_starred(struct compiling *c, const node *n) |
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1750 { |
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1751 expr_ty tmp; |
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1752 REQ(n, star_expr); |
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1753 |
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1754 tmp = ast_for_expr(c, CHILD(n, 1)); |
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1755 if (!tmp) |
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1756 return NULL; |
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1757 |
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1758 /* The Load context is changed later. */ |
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1759 return Starred(tmp, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1760 } |
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1761 |
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1762 |
| 35742 | 1763 /* Do not name a variable 'expr'! Will cause a compile error. |
| 1764 */ | |
| 1765 | |
| 1766 static expr_ty | |
| 1767 ast_for_expr(struct compiling *c, const node *n) | |
| 1768 { | |
| 1769 /* handle the full range of simple expressions | |
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1770 test: or_test ['if' or_test 'else' test] | lambdef |
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1771 test_nocond: or_test | lambdef_nocond |
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1772 or_test: and_test ('or' and_test)* |
| 35742 | 1773 and_test: not_test ('and' not_test)* |
| 1774 not_test: 'not' not_test | comparison | |
| 1775 comparison: expr (comp_op expr)* | |
| 1776 expr: xor_expr ('|' xor_expr)* | |
| 1777 xor_expr: and_expr ('^' and_expr)* | |
| 1778 and_expr: shift_expr ('&' shift_expr)* | |
| 1779 shift_expr: arith_expr (('<<'|'>>') arith_expr)* | |
| 1780 arith_expr: term (('+'|'-') term)* | |
| 1781 term: factor (('*'|'/'|'%'|'//') factor)* | |
| 1782 factor: ('+'|'-'|'~') factor | power | |
| 1783 power: atom trailer* ('**' factor)* | |
| 1784 */ | |
| 1785 | |
| 1786 asdl_seq *seq; | |
| 1787 int i; | |
| 1788 | |
| 1789 loop: | |
| 1790 switch (TYPE(n)) { | |
| 1791 case test: | |
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1792 case test_nocond: |
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1793 if (TYPE(CHILD(n, 0)) == lambdef || |
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1794 TYPE(CHILD(n, 0)) == lambdef_nocond) |
| 35742 | 1795 return ast_for_lambdef(c, CHILD(n, 0)); |
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1796 else if (NCH(n) > 1) |
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1797 return ast_for_ifexpr(c, n); |
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1798 /* Fallthrough */ |
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1799 case or_test: |
| 35742 | 1800 case and_test: |
| 1801 if (NCH(n) == 1) { | |
| 1802 n = CHILD(n, 0); | |
| 1803 goto loop; | |
| 1804 } | |
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1805 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 1806 if (!seq) |
| 1807 return NULL; | |
| 1808 for (i = 0; i < NCH(n); i += 2) { | |
| 1809 expr_ty e = ast_for_expr(c, CHILD(n, i)); | |
| 1810 if (!e) | |
| 1811 return NULL; | |
| 1812 asdl_seq_SET(seq, i / 2, e); | |
| 1813 } | |
| 1814 if (!strcmp(STR(CHILD(n, 1)), "and")) | |
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1815 return BoolOp(And, seq, LINENO(n), n->n_col_offset, |
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1816 c->c_arena); |
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1817 assert(!strcmp(STR(CHILD(n, 1)), "or")); |
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1818 return BoolOp(Or, seq, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1819 case not_test: |
| 1820 if (NCH(n) == 1) { | |
| 1821 n = CHILD(n, 0); | |
| 1822 goto loop; | |
| 1823 } | |
| 1824 else { | |
| 1825 expr_ty expression = ast_for_expr(c, CHILD(n, 1)); | |
| 1826 if (!expression) | |
| 1827 return NULL; | |
| 1828 | |
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1829 return UnaryOp(Not, expression, LINENO(n), n->n_col_offset, |
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1830 c->c_arena); |
| 35742 | 1831 } |
| 1832 case comparison: | |
| 1833 if (NCH(n) == 1) { | |
| 1834 n = CHILD(n, 0); | |
| 1835 goto loop; | |
| 1836 } | |
| 1837 else { | |
| 1838 expr_ty expression; | |
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1839 asdl_int_seq *ops; |
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1840 asdl_seq *cmps; |
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1841 ops = asdl_int_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 1842 if (!ops) |
| 1843 return NULL; | |
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1844 cmps = asdl_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 1845 if (!cmps) { |
| 1846 return NULL; | |
| 1847 } | |
| 1848 for (i = 1; i < NCH(n); i += 2) { | |
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1849 cmpop_ty newoperator; |
| 35742 | 1850 |
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1851 newoperator = ast_for_comp_op(c, CHILD(n, i)); |
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1852 if (!newoperator) { |
| 35742 | 1853 return NULL; |
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1854 } |
| 35742 | 1855 |
| 1856 expression = ast_for_expr(c, CHILD(n, i + 1)); | |
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1857 if (!expression) { |
| 35742 | 1858 return NULL; |
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1859 } |
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1860 |
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1861 asdl_seq_SET(ops, i / 2, newoperator); |
| 35742 | 1862 asdl_seq_SET(cmps, i / 2, expression); |
| 1863 } | |
| 1864 expression = ast_for_expr(c, CHILD(n, 0)); | |
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1865 if (!expression) { |
| 35742 | 1866 return NULL; |
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1867 } |
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1868 |
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1869 return Compare(expression, ops, cmps, LINENO(n), |
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1870 n->n_col_offset, c->c_arena); |
| 35742 | 1871 } |
| 1872 break; | |
| 1873 | |
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1874 case star_expr: |
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1875 return ast_for_starred(c, n); |
| 35742 | 1876 /* The next five cases all handle BinOps. The main body of code |
| 1877 is the same in each case, but the switch turned inside out to | |
| 1878 reuse the code for each type of operator. | |
| 1879 */ | |
| 1880 case expr: | |
| 1881 case xor_expr: | |
| 1882 case and_expr: | |
| 1883 case shift_expr: | |
| 1884 case arith_expr: | |
| 1885 case term: | |
| 1886 if (NCH(n) == 1) { | |
| 1887 n = CHILD(n, 0); | |
| 1888 goto loop; | |
| 1889 } | |
| 1890 return ast_for_binop(c, n); | |
| 1891 case yield_expr: { | |
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1892 expr_ty exp = NULL; |
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1893 if (NCH(n) == 2) { |
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1894 exp = ast_for_testlist(c, CHILD(n, 1)); |
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1895 if (!exp) |
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1896 return NULL; |
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1897 } |
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1898 return Yield(exp, LINENO(n), n->n_col_offset, c->c_arena); |
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1899 } |
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1900 case factor: |
| 35742 | 1901 if (NCH(n) == 1) { |
| 1902 n = CHILD(n, 0); | |
| 1903 goto loop; | |
| 1904 } | |
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1905 return ast_for_factor(c, n); |
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1906 case power: |
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1907 return ast_for_power(c, n); |
| 35742 | 1908 default: |
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1909 PyErr_Format(PyExc_SystemError, "unhandled expr: %d", TYPE(n)); |
| 35742 | 1910 return NULL; |
| 1911 } | |
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1912 /* should never get here unless if error is set */ |
| 35742 | 1913 return NULL; |
| 1914 } | |
| 1915 | |
| 1916 static expr_ty | |
| 1917 ast_for_call(struct compiling *c, const node *n, expr_ty func) | |
| 1918 { | |
| 1919 /* | |
| 1920 arglist: (argument ',')* (argument [',']| '*' test [',' '**' test] | |
| 1921 | '**' test) | |
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1922 argument: [test '='] test [comp_for] # Really [keyword '='] test |
| 35742 | 1923 */ |
| 1924 | |
| 1925 int i, nargs, nkeywords, ngens; | |
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1926 asdl_seq *args; |
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1927 asdl_seq *keywords; |
| 35742 | 1928 expr_ty vararg = NULL, kwarg = NULL; |
| 1929 | |
| 1930 REQ(n, arglist); | |
| 1931 | |
| 1932 nargs = 0; | |
| 1933 nkeywords = 0; | |
| 1934 ngens = 0; | |
| 1935 for (i = 0; i < NCH(n); i++) { | |
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1936 node *ch = CHILD(n, i); |
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1937 if (TYPE(ch) == argument) { |
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1938 if (NCH(ch) == 1) |
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1939 nargs++; |
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1940 else if (TYPE(CHILD(ch, 1)) == comp_for) |
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1941 ngens++; |
| 35742 | 1942 else |
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1943 nkeywords++; |
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1944 } |
| 35742 | 1945 } |
| 1946 if (ngens > 1 || (ngens && (nargs || nkeywords))) { | |
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1947 ast_error(n, "Generator expression must be parenthesized " |
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1948 "if not sole argument"); |
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1949 return NULL; |
| 35742 | 1950 } |
| 1951 | |
| 1952 if (nargs + nkeywords + ngens > 255) { | |
| 1953 ast_error(n, "more than 255 arguments"); | |
| 1954 return NULL; | |
| 1955 } | |
| 1956 | |
|
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1957 args = asdl_seq_new(nargs + ngens, c->c_arena); |
| 35742 | 1958 if (!args) |
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1959 return NULL; |
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1960 keywords = asdl_seq_new(nkeywords, c->c_arena); |
| 35742 | 1961 if (!keywords) |
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1962 return NULL; |
| 35742 | 1963 nargs = 0; |
| 1964 nkeywords = 0; | |
| 1965 for (i = 0; i < NCH(n); i++) { | |
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1966 node *ch = CHILD(n, i); |
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1967 if (TYPE(ch) == argument) { |
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1968 expr_ty e; |
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1969 if (NCH(ch) == 1) { |
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1970 if (nkeywords) { |
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1971 ast_error(CHILD(ch, 0), |
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1972 "non-keyword arg after keyword arg"); |
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1973 return NULL; |
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1974 } |
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1975 if (vararg) { |
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1976 ast_error(CHILD(ch, 0), |
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1977 "only named arguments may follow *expression"); |
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1978 return NULL; |
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1979 } |
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1980 e = ast_for_expr(c, CHILD(ch, 0)); |
| 35742 | 1981 if (!e) |
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1982 return NULL; |
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1983 asdl_seq_SET(args, nargs++, e); |
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1984 } |
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1985 else if (TYPE(CHILD(ch, 1)) == comp_for) { |
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1986 e = ast_for_genexp(c, ch); |
| 35742 | 1987 if (!e) |
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1988 return NULL; |
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1989 asdl_seq_SET(args, nargs++, e); |
| 35742 | 1990 } |
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1991 else { |
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1992 keyword_ty kw; |
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1993 identifier key, tmp; |
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1994 int k; |
| 35742 | 1995 |
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1996 /* CHILD(ch, 0) is test, but must be an identifier? */ |
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1997 e = ast_for_expr(c, CHILD(ch, 0)); |
| 35742 | 1998 if (!e) |
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1999 return NULL; |
| 35742 | 2000 /* f(lambda x: x[0] = 3) ends up getting parsed with |
| 2001 * LHS test = lambda x: x[0], and RHS test = 3. | |
| 2002 * SF bug 132313 points out that complaining about a keyword | |
| 2003 * then is very confusing. | |
| 2004 */ | |
| 2005 if (e->kind == Lambda_kind) { | |
| 2006 ast_error(CHILD(ch, 0), "lambda cannot contain assignment"); | |
|
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2007 return NULL; |
| 35742 | 2008 } else if (e->kind != Name_kind) { |
| 2009 ast_error(CHILD(ch, 0), "keyword can't be an expression"); | |
|
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2010 return NULL; |
|
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2011 } else if (forbidden_name(e->v.Name.id, ch, 1)) { |
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2012 return NULL; |
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2013 } |
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2014 key = e->v.Name.id; |
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2015 for (k = 0; k < nkeywords; k++) { |
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2016 tmp = ((keyword_ty)asdl_seq_GET(keywords, k))->arg; |
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2017 if (!PyUnicode_Compare(tmp, key)) { |
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2018 ast_error(CHILD(ch, 0), "keyword argument repeated"); |
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2019 return NULL; |
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2020 } |
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2021 } |
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2022 e = ast_for_expr(c, CHILD(ch, 2)); |
| 35742 | 2023 if (!e) |
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2024 return NULL; |
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2025 kw = keyword(key, e, c->c_arena); |
| 35742 | 2026 if (!kw) |
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2027 return NULL; |
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2028 asdl_seq_SET(keywords, nkeywords++, kw); |
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2029 } |
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2030 } |
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2031 else if (TYPE(ch) == STAR) { |
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2032 vararg = ast_for_expr(c, CHILD(n, i+1)); |
|
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2033 if (!vararg) |
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2034 return NULL; |
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2035 i++; |
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2036 } |
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2037 else if (TYPE(ch) == DOUBLESTAR) { |
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2038 kwarg = ast_for_expr(c, CHILD(n, i+1)); |
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2039 if (!kwarg) |
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2040 return NULL; |
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2041 i++; |
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2042 } |
| 35742 | 2043 } |
| 2044 | |
|
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2045 return Call(func, args, keywords, vararg, kwarg, func->lineno, func->col_offset, c->c_arena); |
| 35742 | 2046 } |
| 2047 | |
| 2048 static expr_ty | |
|
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2049 ast_for_testlist(struct compiling *c, const node* n) |
| 35742 | 2050 { |
|
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2051 /* testlist_comp: test (comp_for | (',' test)* [',']) */ |
|
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2052 /* testlist: test (',' test)* [','] */ |
| 35742 | 2053 assert(NCH(n) > 0); |
|
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2054 if (TYPE(n) == testlist_comp) { |
|
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2055 if (NCH(n) > 1) |
|
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2056 assert(TYPE(CHILD(n, 1)) != comp_for); |
|
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2057 } |
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2058 else { |
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2059 assert(TYPE(n) == testlist || |
|
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2060 TYPE(n) == testlist_star_expr); |
|
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2061 } |
| 35742 | 2062 if (NCH(n) == 1) |
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2063 return ast_for_expr(c, CHILD(n, 0)); |
| 35742 | 2064 else { |
| 2065 asdl_seq *tmp = seq_for_testlist(c, n); | |
| 2066 if (!tmp) | |
| 2067 return NULL; | |
|
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2068 return Tuple(tmp, Load, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2069 } |
|
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2070 } |
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2071 |
| 35742 | 2072 static stmt_ty |
| 2073 ast_for_expr_stmt(struct compiling *c, const node *n) | |
| 2074 { | |
| 2075 REQ(n, expr_stmt); | |
|
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2076 /* expr_stmt: testlist_star_expr (augassign (yield_expr|testlist) |
| 35742 | 2077 | ('=' (yield_expr|testlist))*) |
|
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2078 testlist_star_expr: (test|star_expr) (',' test|star_expr)* [','] |
| 35742 | 2079 augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' |
|
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2080 | '<<=' | '>>=' | '**=' | '//=' |
| 35742 | 2081 test: ... here starts the operator precendence dance |
| 2082 */ | |
| 2083 | |
| 2084 if (NCH(n) == 1) { | |
|
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2085 expr_ty e = ast_for_testlist(c, CHILD(n, 0)); |
| 35742 | 2086 if (!e) |
| 2087 return NULL; | |
| 2088 | |
|
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2089 return Expr(e, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2090 } |
| 2091 else if (TYPE(CHILD(n, 1)) == augassign) { | |
| 2092 expr_ty expr1, expr2; | |
|
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|
2093 operator_ty newoperator; |
|
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2094 node *ch = CHILD(n, 0); |
| 35742 | 2095 |
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2096 expr1 = ast_for_testlist(c, ch); |
| 35742 | 2097 if (!expr1) |
| 2098 return NULL; | |
|
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2099 if(!set_context(c, expr1, Store, ch)) |
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2100 return NULL; |
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2101 /* set_context checks that most expressions are not the left side. |
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2102 Augmented assignments can only have a name, a subscript, or an |
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2103 attribute on the left, though, so we have to explicitly check for |
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2104 those. */ |
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2105 switch (expr1->kind) { |
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2106 case Name_kind: |
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2107 case Attribute_kind: |
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2108 case Subscript_kind: |
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2109 break; |
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2110 default: |
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2111 ast_error(ch, "illegal expression for augmented assignment"); |
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2112 return NULL; |
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2113 } |
| 35742 | 2114 |
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2115 ch = CHILD(n, 2); |
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2116 if (TYPE(ch) == testlist) |
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2117 expr2 = ast_for_testlist(c, ch); |
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2118 else |
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2119 expr2 = ast_for_expr(c, ch); |
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2120 if (!expr2) |
| 35742 | 2121 return NULL; |
| 2122 | |
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2123 newoperator = ast_for_augassign(c, CHILD(n, 1)); |
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2124 if (!newoperator) |
| 35742 | 2125 return NULL; |
| 2126 | |
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2127 return AugAssign(expr1, newoperator, expr2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2128 } |
| 2129 else { | |
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2130 int i; |
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2131 asdl_seq *targets; |
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2132 node *value; |
| 35742 | 2133 expr_ty expression; |
| 2134 | |
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2135 /* a normal assignment */ |
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2136 REQ(CHILD(n, 1), EQUAL); |
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2137 targets = asdl_seq_new(NCH(n) / 2, c->c_arena); |
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2138 if (!targets) |
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2139 return NULL; |
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2140 for (i = 0; i < NCH(n) - 2; i += 2) { |
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2141 expr_ty e; |
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2142 node *ch = CHILD(n, i); |
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2143 if (TYPE(ch) == yield_expr) { |
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2144 ast_error(ch, "assignment to yield expression not possible"); |
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2145 return NULL; |
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2146 } |
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2147 e = ast_for_testlist(c, ch); |
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2148 if (!e) |
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2149 return NULL; |
| 35742 | 2150 |
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2151 /* set context to assign */ |
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2152 if (!set_context(c, e, Store, CHILD(n, i))) |
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2153 return NULL; |
| 35742 | 2154 |
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2155 asdl_seq_SET(targets, i / 2, e); |
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2156 } |
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2157 value = CHILD(n, NCH(n) - 1); |
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2158 if (TYPE(value) == testlist_star_expr) |
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2159 expression = ast_for_testlist(c, value); |
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2160 else |
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2161 expression = ast_for_expr(c, value); |
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2162 if (!expression) |
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2163 return NULL; |
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2164 return Assign(targets, expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2165 } |
| 2166 } | |
| 2167 | |
|
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2168 |
| 35742 | 2169 static asdl_seq * |
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2170 ast_for_exprlist(struct compiling *c, const node *n, expr_context_ty context) |
| 35742 | 2171 { |
| 2172 asdl_seq *seq; | |
| 2173 int i; | |
| 2174 expr_ty e; | |
| 2175 | |
| 2176 REQ(n, exprlist); | |
| 2177 | |
|
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2178 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 2179 if (!seq) |
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2180 return NULL; |
| 35742 | 2181 for (i = 0; i < NCH(n); i += 2) { |
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2182 e = ast_for_expr(c, CHILD(n, i)); |
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2183 if (!e) |
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2184 return NULL; |
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2185 asdl_seq_SET(seq, i / 2, e); |
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2186 if (context && !set_context(c, e, context, CHILD(n, i))) |
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2187 return NULL; |
| 35742 | 2188 } |
| 2189 return seq; | |
| 2190 } | |
| 2191 | |
| 2192 static stmt_ty | |
| 2193 ast_for_del_stmt(struct compiling *c, const node *n) | |
| 2194 { | |
| 2195 asdl_seq *expr_list; | |
|
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2196 |
| 35742 | 2197 /* del_stmt: 'del' exprlist */ |
| 2198 REQ(n, del_stmt); | |
| 2199 | |
| 2200 expr_list = ast_for_exprlist(c, CHILD(n, 1), Del); | |
| 2201 if (!expr_list) | |
| 2202 return NULL; | |
|
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2203 return Delete(expr_list, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2204 } |
| 2205 | |
| 2206 static stmt_ty | |
| 2207 ast_for_flow_stmt(struct compiling *c, const node *n) | |
| 2208 { | |
| 2209 /* | |
| 2210 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | |
| 2211 | yield_stmt | |
| 2212 break_stmt: 'break' | |
| 2213 continue_stmt: 'continue' | |
| 2214 return_stmt: 'return' [testlist] | |
| 2215 yield_stmt: yield_expr | |
| 2216 yield_expr: 'yield' testlist | |
| 2217 raise_stmt: 'raise' [test [',' test [',' test]]] | |
| 2218 */ | |
| 2219 node *ch; | |
| 2220 | |
| 2221 REQ(n, flow_stmt); | |
| 2222 ch = CHILD(n, 0); | |
| 2223 switch (TYPE(ch)) { | |
| 2224 case break_stmt: | |
|
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2225 return Break(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2226 case continue_stmt: |
|
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2227 return Continue(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2228 case yield_stmt: { /* will reduce to yield_expr */ |
|
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2229 expr_ty exp = ast_for_expr(c, CHILD(ch, 0)); |
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2230 if (!exp) |
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2231 return NULL; |
|
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|
2232 return Expr(exp, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2233 } |
| 2234 case return_stmt: | |
| 2235 if (NCH(ch) == 1) | |
|
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|
2236 return Return(NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2237 else { |
|
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|
2238 expr_ty expression = ast_for_testlist(c, CHILD(ch, 1)); |
| 35742 | 2239 if (!expression) |
| 2240 return NULL; | |
|
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|
2241 return Return(expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2242 } |
| 2243 case raise_stmt: | |
| 2244 if (NCH(ch) == 1) | |
|
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2245 return Raise(NULL, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
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2246 else if (NCH(ch) >= 2) { |
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|
2247 expr_ty cause = NULL; |
| 35742 | 2248 expr_ty expression = ast_for_expr(c, CHILD(ch, 1)); |
| 2249 if (!expression) | |
| 2250 return NULL; | |
|
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2251 if (NCH(ch) == 4) { |
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|
2252 cause = ast_for_expr(c, CHILD(ch, 3)); |
|
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2253 if (!cause) |
|
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|
2254 return NULL; |
|
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|
2255 } |
|
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|
2256 return Raise(expression, cause, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2257 } |
| 2258 default: | |
|
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|
2259 PyErr_Format(PyExc_SystemError, |
| 35742 | 2260 "unexpected flow_stmt: %d", TYPE(ch)); |
| 2261 return NULL; | |
| 2262 } | |
|
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2263 |
|
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|
2264 PyErr_SetString(PyExc_SystemError, "unhandled flow statement"); |
|
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2265 return NULL; |
| 35742 | 2266 } |
| 2267 | |
| 2268 static alias_ty | |
|
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|
2269 alias_for_import_name(struct compiling *c, const node *n, int store) |
| 35742 | 2270 { |
| 2271 /* | |
|
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|
2272 import_as_name: NAME ['as' NAME] |
|
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|
2273 dotted_as_name: dotted_name ['as' NAME] |
| 35742 | 2274 dotted_name: NAME ('.' NAME)* |
| 2275 */ | |
|
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|
2276 identifier str, name; |
|
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|
2277 |
| 35742 | 2278 loop: |
| 2279 switch (TYPE(n)) { | |
| 70916 | 2280 case import_as_name: { |
|
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2281 node *name_node = CHILD(n, 0); |
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2282 str = NULL; |
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2283 name = NEW_IDENTIFIER(name_node); |
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2284 if (!name) |
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2285 return NULL; |
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2286 if (NCH(n) == 3) { |
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2287 node *str_node = CHILD(n, 2); |
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2288 str = NEW_IDENTIFIER(str_node); |
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2289 if (!str) |
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2290 return NULL; |
|
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2291 if (store && forbidden_name(str, str_node, 0)) |
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2292 return NULL; |
|
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2293 } |
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2294 else { |
|
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2295 if (forbidden_name(name, name_node, 0)) |
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2296 return NULL; |
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2297 } |
|
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2298 return alias(name, str, c->c_arena); |
|
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|
2299 } |
| 35742 | 2300 case dotted_as_name: |
| 2301 if (NCH(n) == 1) { | |
| 2302 n = CHILD(n, 0); | |
| 2303 goto loop; | |
| 2304 } | |
| 2305 else { | |
|
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2306 node *asname_node = CHILD(n, 2); |
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|
2307 alias_ty a = alias_for_import_name(c, CHILD(n, 0), 0); |
|
39610
3674f20ac781
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|
2308 if (!a) |
|
3674f20ac781
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|
2309 return NULL; |
| 35742 | 2310 assert(!a->asname); |
|
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2311 a->asname = NEW_IDENTIFIER(asname_node); |
|
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2312 if (!a->asname) |
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2313 return NULL; |
|
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2314 if (forbidden_name(a->asname, asname_node, 0)) |
|
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|
2315 return NULL; |
| 35742 | 2316 return a; |
| 2317 } | |
| 2318 break; | |
| 2319 case dotted_name: | |
|
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2320 if (NCH(n) == 1) { |
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|
2321 node *name_node = CHILD(n, 0); |
|
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|
2322 name = NEW_IDENTIFIER(name_node); |
|
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2323 if (!name) |
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|
2324 return NULL; |
|
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|
2325 if (store && forbidden_name(name, name_node, 0)) |
|
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|
2326 return NULL; |
|
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|
2327 return alias(name, NULL, c->c_arena); |
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|
2328 } |
| 35742 | 2329 else { |
| 2330 /* Create a string of the form "a.b.c" */ | |
|
36242
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Repair bizarre indentation created by VC 7.1.
Tim Peters <tim.peters@gmail.com>
parents:
36241
diff
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|
2331 int i; |
|
36241
557e9b6ee7e1
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Tim Peters <tim.peters@gmail.com>
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|
2332 size_t len; |
| 35742 | 2333 char *s; |
|
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|
2334 PyObject *uni; |
| 35742 | 2335 |
| 2336 len = 0; | |
| 2337 for (i = 0; i < NCH(n); i += 2) | |
| 2338 /* length of string plus one for the dot */ | |
| 2339 len += strlen(STR(CHILD(n, i))) + 1; | |
| 2340 len--; /* the last name doesn't have a dot */ | |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
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diff
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|
2341 str = PyBytes_FromStringAndSize(NULL, len); |
| 35742 | 2342 if (!str) |
| 2343 return NULL; | |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
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diff
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|
2344 s = PyBytes_AS_STRING(str); |
| 35742 | 2345 if (!s) |
| 2346 return NULL; | |
| 2347 for (i = 0; i < NCH(n); i += 2) { | |
| 2348 char *sch = STR(CHILD(n, i)); | |
| 2349 strcpy(s, STR(CHILD(n, i))); | |
| 2350 s += strlen(sch); | |
| 2351 *s++ = '.'; | |
| 2352 } | |
| 2353 --s; | |
| 2354 *s = '\0'; | |
|
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2355 uni = PyUnicode_DecodeUTF8(PyBytes_AS_STRING(str), |
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2356 PyBytes_GET_SIZE(str), |
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2357 NULL); |
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|
2358 Py_DECREF(str); |
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2359 if (!uni) |
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2360 return NULL; |
|
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|
2361 str = uni; |
|
42013
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|
2362 PyUnicode_InternInPlace(&str); |
|
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|
2363 PyArena_AddPyObject(c->c_arena, str); |
|
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|
2364 return alias(str, NULL, c->c_arena); |
| 35742 | 2365 } |
| 2366 break; | |
| 2367 case STAR: | |
|
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2368 str = PyUnicode_InternFromString("*"); |
|
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|
2369 PyArena_AddPyObject(c->c_arena, str); |
|
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|
2370 return alias(str, NULL, c->c_arena); |
| 35742 | 2371 default: |
|
35870
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|
2372 PyErr_Format(PyExc_SystemError, |
| 35742 | 2373 "unexpected import name: %d", TYPE(n)); |
| 2374 return NULL; | |
| 2375 } | |
|
36072
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2376 |
|
de16a85c3b4c
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|
2377 PyErr_SetString(PyExc_SystemError, "unhandled import name condition"); |
| 35742 | 2378 return NULL; |
| 2379 } | |
| 2380 | |
| 2381 static stmt_ty | |
| 2382 ast_for_import_stmt(struct compiling *c, const node *n) | |
| 2383 { | |
| 2384 /* | |
| 2385 import_stmt: import_name | import_from | |
| 2386 import_name: 'import' dotted_as_names | |
|
41235
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|
2387 import_from: 'from' (('.' | '...')* dotted_name | ('.' | '...')+) |
|
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2388 'import' ('*' | '(' import_as_names ')' | import_as_names) |
| 35742 | 2389 */ |
|
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|
2390 int lineno; |
|
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|
2391 int col_offset; |
| 35742 | 2392 int i; |
| 2393 asdl_seq *aliases; | |
| 2394 | |
| 2395 REQ(n, import_stmt); | |
|
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|
2396 lineno = LINENO(n); |
|
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2397 col_offset = n->n_col_offset; |
| 35742 | 2398 n = CHILD(n, 0); |
|
36682
52cbc447e1c9
And some more cleanup.
Thomas Wouters <thomas@python.org>
parents:
36681
diff
changeset
|
2399 if (TYPE(n) == import_name) { |
| 35742 | 2400 n = CHILD(n, 1); |
|
40450
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parents:
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diff
changeset
|
2401 REQ(n, dotted_as_names); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2402 aliases = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2403 if (!aliases) |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2404 return NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2405 for (i = 0; i < NCH(n); i += 2) { |
|
54918
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
54703
diff
changeset
|
2406 alias_ty import_alias = alias_for_import_name(c, CHILD(n, i), 1); |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2407 if (!import_alias) |
| 35742 | 2408 return NULL; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2409 asdl_seq_SET(aliases, i / 2, import_alias); |
| 35742 | 2410 } |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2411 return Import(aliases, lineno, col_offset, c->c_arena); |
| 35742 | 2412 } |
|
36682
52cbc447e1c9
And some more cleanup.
Thomas Wouters <thomas@python.org>
parents:
36681
diff
changeset
|
2413 else if (TYPE(n) == import_from) { |
| 35742 | 2414 int n_children; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2415 int idx, ndots = 0; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2416 alias_ty mod = NULL; |
|
54918
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
54703
diff
changeset
|
2417 identifier modname = NULL; |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2418 |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2419 /* Count the number of dots (for relative imports) and check for the |
|
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2420 optional module name */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2421 for (idx = 1; idx < NCH(n); idx++) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2422 if (TYPE(CHILD(n, idx)) == dotted_name) { |
|
54918
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
54703
diff
changeset
|
2423 mod = alias_for_import_name(c, CHILD(n, idx), 0); |
|
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
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diff
changeset
|
2424 if (!mod) |
|
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
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diff
changeset
|
2425 return NULL; |
|
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parents:
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diff
changeset
|
2426 idx++; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2427 break; |
|
41235
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2428 } else if (TYPE(CHILD(n, idx)) == ELLIPSIS) { |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2429 /* three consecutive dots are tokenized as one ELLIPSIS */ |
|
41235
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2430 ndots += 3; |
|
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2431 continue; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2432 } else if (TYPE(CHILD(n, idx)) != DOT) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2433 break; |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2434 } |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2435 ndots++; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2436 } |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2437 idx++; /* skip over the 'import' keyword */ |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2438 switch (TYPE(CHILD(n, idx))) { |
|
36681
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2439 case STAR: |
|
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2440 /* from ... import * */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2441 n = CHILD(n, idx); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2442 n_children = 1; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2443 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2444 case LPAR: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2445 /* from ... import (x, y, z) */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2446 n = CHILD(n, idx + 1); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2447 n_children = NCH(n); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2448 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2449 case import_as_names: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2450 /* from ... import x, y, z */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2451 n = CHILD(n, idx); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2452 n_children = NCH(n); |
|
36681
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2453 if (n_children % 2 == 0) { |
| 35742 | 2454 ast_error(n, "trailing comma not allowed without" |
| 2455 " surrounding parentheses"); | |
| 2456 return NULL; | |
| 2457 } | |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2458 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2459 default: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2460 ast_error(n, "Unexpected node-type in from-import"); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2461 return NULL; |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2462 } |
| 35742 | 2463 |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2464 aliases = asdl_seq_new((n_children + 1) / 2, c->c_arena); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2465 if (!aliases) |
| 35742 | 2466 return NULL; |
| 2467 | |
| 2468 /* handle "from ... import *" special b/c there's no children */ | |
|
36681
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2469 if (TYPE(n) == STAR) { |
|
54918
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
54703
diff
changeset
|
2470 alias_ty import_alias = alias_for_import_name(c, n, 1); |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2471 if (!import_alias) |
| 35742 | 2472 return NULL; |
|
40450
cc992d75d5b3
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parents:
40215
diff
changeset
|
2473 asdl_seq_SET(aliases, 0, import_alias); |
| 35742 | 2474 } |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2475 else { |
|
40450
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parents:
40215
diff
changeset
|
2476 for (i = 0; i < NCH(n); i += 2) { |
|
54918
0704f15b4682
Merged revisions 73376,73393,73398,73400,73404-73405,73409,73419-73421,73432,73457,73460,73485-73486,73488-73489,73501-73502,73513-73514 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
54703
diff
changeset
|
2477 alias_ty import_alias = alias_for_import_name(c, CHILD(n, i), 1); |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2478 if (!import_alias) |
|
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2479 return NULL; |
|
40450
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2480 asdl_seq_SET(aliases, i / 2, import_alias); |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2481 } |
| 35742 | 2482 } |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2483 if (mod != NULL) |
|
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2484 modname = mod->name; |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2485 return ImportFrom(modname, aliases, ndots, lineno, col_offset, |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2486 c->c_arena); |
| 35742 | 2487 } |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2488 PyErr_Format(PyExc_SystemError, |
| 35742 | 2489 "unknown import statement: starts with command '%s'", |
| 2490 STR(CHILD(n, 0))); | |
| 2491 return NULL; | |
| 2492 } | |
| 2493 | |
| 2494 static stmt_ty | |
| 2495 ast_for_global_stmt(struct compiling *c, const node *n) | |
| 2496 { | |
| 2497 /* global_stmt: 'global' NAME (',' NAME)* */ | |
| 2498 identifier name; | |
| 2499 asdl_seq *s; | |
| 2500 int i; | |
| 2501 | |
| 2502 REQ(n, global_stmt); | |
|
36065
ea083efdc96c
Merge from ast-arena. This reduces the code in Python/ast.c by ~300 lines,
Neal Norwitz <nnorwitz@gmail.com>
parents:
36001
diff
changeset
|
2503 s = asdl_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 2504 if (!s) |
|
40450
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parents:
40215
diff
changeset
|
2505 return NULL; |
| 35742 | 2506 for (i = 1; i < NCH(n); i += 2) { |
|
40450
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parents:
40215
diff
changeset
|
2507 name = NEW_IDENTIFIER(CHILD(n, i)); |
|
cc992d75d5b3
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parents:
40215
diff
changeset
|
2508 if (!name) |
|
cc992d75d5b3
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parents:
40215
diff
changeset
|
2509 return NULL; |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2510 asdl_seq_SET(s, i / 2, name); |
| 35742 | 2511 } |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2512 return Global(s, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2513 } |
| 2514 | |
| 2515 static stmt_ty | |
|
40965
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2516 ast_for_nonlocal_stmt(struct compiling *c, const node *n) |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2517 { |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2518 /* nonlocal_stmt: 'nonlocal' NAME (',' NAME)* */ |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2519 identifier name; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2520 asdl_seq *s; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2521 int i; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2522 |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2523 REQ(n, nonlocal_stmt); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2524 s = asdl_seq_new(NCH(n) / 2, c->c_arena); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2525 if (!s) |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2526 return NULL; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2527 for (i = 1; i < NCH(n); i += 2) { |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2528 name = NEW_IDENTIFIER(CHILD(n, i)); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2529 if (!name) |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2530 return NULL; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2531 asdl_seq_SET(s, i / 2, name); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2532 } |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2533 return Nonlocal(s, LINENO(n), n->n_col_offset, c->c_arena); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2534 } |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2535 |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2536 static stmt_ty |
| 35742 | 2537 ast_for_assert_stmt(struct compiling *c, const node *n) |
| 2538 { | |
| 2539 /* assert_stmt: 'assert' test [',' test] */ | |
| 2540 REQ(n, assert_stmt); | |
| 2541 if (NCH(n) == 2) { | |
| 2542 expr_ty expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2543 if (!expression) | |
| 2544 return NULL; | |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2545 return Assert(expression, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2546 } |
| 2547 else if (NCH(n) == 4) { | |
| 2548 expr_ty expr1, expr2; | |
| 2549 | |
| 2550 expr1 = ast_for_expr(c, CHILD(n, 1)); | |
| 2551 if (!expr1) | |
| 2552 return NULL; | |
| 2553 expr2 = ast_for_expr(c, CHILD(n, 3)); | |
| 2554 if (!expr2) | |
| 2555 return NULL; | |
|
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Antoine Pitrou <solipsis@pitrou.net>
parents:
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|
2556 |
|
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cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2557 return Assert(expr1, expr2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2558 } |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2559 PyErr_Format(PyExc_SystemError, |
| 35742 | 2560 "improper number of parts to 'assert' statement: %d", |
| 2561 NCH(n)); | |
| 2562 return NULL; | |
| 2563 } | |
| 2564 | |
| 2565 static asdl_seq * | |
| 2566 ast_for_suite(struct compiling *c, const node *n) | |
| 2567 { | |
| 2568 /* suite: simple_stmt | NEWLINE INDENT stmt+ DEDENT */ | |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2569 asdl_seq *seq; |
| 35742 | 2570 stmt_ty s; |
| 2571 int i, total, num, end, pos = 0; | |
| 2572 node *ch; | |
| 2573 | |
| 2574 REQ(n, suite); | |
| 2575 | |
| 2576 total = num_stmts(n); | |
|
36065
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Merge from ast-arena. This reduces the code in Python/ast.c by ~300 lines,
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parents:
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diff
changeset
|
2577 seq = asdl_seq_new(total, c->c_arena); |
| 35742 | 2578 if (!seq) |
|
40450
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parents:
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diff
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|
2579 return NULL; |
| 35742 | 2580 if (TYPE(CHILD(n, 0)) == simple_stmt) { |
|
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parents:
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diff
changeset
|
2581 n = CHILD(n, 0); |
|
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Four months of trunk changes (including a few releases...)
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diff
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|
2582 /* simple_stmt always ends with a NEWLINE, |
|
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|
2583 and may have a trailing SEMI |
|
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|
2584 */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2585 end = NCH(n) - 1; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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diff
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|
2586 if (TYPE(CHILD(n, end - 1)) == SEMI) |
|
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Four months of trunk changes (including a few releases...)
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|
2587 end--; |
| 35742 | 2588 /* loop by 2 to skip semi-colons */ |
|
40450
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diff
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|
2589 for (i = 0; i < end; i += 2) { |
|
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parents:
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|
2590 ch = CHILD(n, i); |
|
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parents:
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diff
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|
2591 s = ast_for_stmt(c, ch); |
|
cc992d75d5b3
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parents:
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diff
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|
2592 if (!s) |
|
cc992d75d5b3
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parents:
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diff
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|
2593 return NULL; |
|
cc992d75d5b3
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parents:
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|
2594 asdl_seq_SET(seq, pos++, s); |
|
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parents:
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|
2595 } |
| 35742 | 2596 } |
| 2597 else { | |
|
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parents:
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diff
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|
2598 for (i = 2; i < (NCH(n) - 1); i++) { |
|
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Four months of trunk changes (including a few releases...)
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parents:
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|
2599 ch = CHILD(n, i); |
|
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parents:
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|
2600 REQ(ch, stmt); |
|
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Four months of trunk changes (including a few releases...)
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parents:
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diff
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|
2601 num = num_stmts(ch); |
|
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Four months of trunk changes (including a few releases...)
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parents:
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|
2602 if (num == 1) { |
|
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|
2603 /* small_stmt or compound_stmt with only one child */ |
|
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parents:
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|
2604 s = ast_for_stmt(c, ch); |
|
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|
2605 if (!s) |
|
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parents:
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changeset
|
2606 return NULL; |
|
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parents:
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diff
changeset
|
2607 asdl_seq_SET(seq, pos++, s); |
|
cc992d75d5b3
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parents:
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diff
changeset
|
2608 } |
|
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Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2609 else { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2610 int j; |
|
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Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2611 ch = CHILD(ch, 0); |
|
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Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2612 REQ(ch, simple_stmt); |
|
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Four months of trunk changes (including a few releases...)
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diff
changeset
|
2613 for (j = 0; j < NCH(ch); j += 2) { |
|
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Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2614 /* statement terminates with a semi-colon ';' */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2615 if (NCH(CHILD(ch, j)) == 0) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2616 assert((j + 1) == NCH(ch)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2617 break; |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2618 } |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2619 s = ast_for_stmt(c, CHILD(ch, j)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2620 if (!s) |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2621 return NULL; |
|
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Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2622 asdl_seq_SET(seq, pos++, s); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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diff
changeset
|
2623 } |
|
cc992d75d5b3
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parents:
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diff
changeset
|
2624 } |
|
cc992d75d5b3
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parents:
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diff
changeset
|
2625 } |
| 35742 | 2626 } |
| 2627 assert(pos == seq->size); | |
| 2628 return seq; | |
| 2629 } | |
| 2630 | |
| 2631 static stmt_ty | |
| 2632 ast_for_if_stmt(struct compiling *c, const node *n) | |
| 2633 { | |
| 2634 /* if_stmt: 'if' test ':' suite ('elif' test ':' suite)* | |
| 2635 ['else' ':' suite] | |
| 2636 */ | |
| 2637 char *s; | |
| 2638 | |
| 2639 REQ(n, if_stmt); | |
| 2640 | |
| 2641 if (NCH(n) == 4) { | |
| 2642 expr_ty expression; | |
| 2643 asdl_seq *suite_seq; | |
| 2644 | |
| 2645 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2646 if (!expression) | |
| 2647 return NULL; | |
|
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diff
changeset
|
2648 suite_seq = ast_for_suite(c, CHILD(n, 3)); |
|
36072
de16a85c3b4c
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Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2649 if (!suite_seq) |
| 35742 | 2650 return NULL; |
|
61467
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diff
changeset
|
2651 |
|
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06145fbc7ab9
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parents:
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diff
changeset
|
2652 return If(expression, suite_seq, NULL, LINENO(n), n->n_col_offset, |
|
06145fbc7ab9
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diff
changeset
|
2653 c->c_arena); |
| 35742 | 2654 } |
|
36072
de16a85c3b4c
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Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2655 |
| 35742 | 2656 s = STR(CHILD(n, 4)); |
| 2657 /* s[2], the third character in the string, will be | |
| 2658 's' for el_s_e, or | |
| 2659 'i' for el_i_f | |
| 2660 */ | |
| 2661 if (s[2] == 's') { | |
| 2662 expr_ty expression; | |
| 2663 asdl_seq *seq1, *seq2; | |
| 2664 | |
| 2665 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2666 if (!expression) | |
| 2667 return NULL; | |
| 2668 seq1 = ast_for_suite(c, CHILD(n, 3)); | |
|
36072
de16a85c3b4c
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Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2669 if (!seq1) |
| 35742 | 2670 return NULL; |
| 2671 seq2 = ast_for_suite(c, CHILD(n, 6)); | |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2672 if (!seq2) |
| 35742 | 2673 return NULL; |
| 2674 | |
|
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06145fbc7ab9
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changeset
|
2675 return If(expression, seq1, seq2, LINENO(n), n->n_col_offset, |
|
06145fbc7ab9
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changeset
|
2676 c->c_arena); |
| 35742 | 2677 } |
| 2678 else if (s[2] == 'i') { | |
|
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|
2679 int i, n_elif, has_else = 0; |
|
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|
2680 expr_ty expression; |
|
06145fbc7ab9
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changeset
|
2681 asdl_seq *suite_seq; |
|
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|
2682 asdl_seq *orelse = NULL; |
|
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diff
changeset
|
2683 n_elif = NCH(n) - 4; |
| 35742 | 2684 /* must reference the child n_elif+1 since 'else' token is third, |
| 2685 not fourth, child from the end. */ | |
|
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|
2686 if (TYPE(CHILD(n, (n_elif + 1))) == NAME |
|
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|
2687 && STR(CHILD(n, (n_elif + 1)))[2] == 's') { |
|
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|
2688 has_else = 1; |
|
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diff
changeset
|
2689 n_elif -= 3; |
|
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changeset
|
2690 } |
|
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changeset
|
2691 n_elif /= 4; |
| 35742 | 2692 |
|
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|
2693 if (has_else) { |
|
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changeset
|
2694 asdl_seq *suite_seq2; |
| 35742 | 2695 |
|
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|
2696 orelse = asdl_seq_new(1, c->c_arena); |
|
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changeset
|
2697 if (!orelse) |
|
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changeset
|
2698 return NULL; |
| 35742 | 2699 expression = ast_for_expr(c, CHILD(n, NCH(n) - 6)); |
|
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changeset
|
2700 if (!expression) |
| 35742 | 2701 return NULL; |
|
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changeset
|
2702 suite_seq = ast_for_suite(c, CHILD(n, NCH(n) - 4)); |
|
06145fbc7ab9
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changeset
|
2703 if (!suite_seq) |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
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parents:
36066
diff
changeset
|
2704 return NULL; |
|
41554
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changeset
|
2705 suite_seq2 = ast_for_suite(c, CHILD(n, NCH(n) - 1)); |
|
06145fbc7ab9
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changeset
|
2706 if (!suite_seq2) |
| 35742 | 2707 return NULL; |
| 2708 | |
|
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changeset
|
2709 asdl_seq_SET(orelse, 0, |
|
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|
2710 If(expression, suite_seq, suite_seq2, |
|
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|
2711 LINENO(CHILD(n, NCH(n) - 6)), |
|
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|
2712 CHILD(n, NCH(n) - 6)->n_col_offset, |
|
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|
2713 c->c_arena)); |
|
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|
2714 /* the just-created orelse handled the last elif */ |
|
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|
2715 n_elif--; |
|
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|
2716 } |
| 35742 | 2717 |
|
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|
2718 for (i = 0; i < n_elif; i++) { |
|
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|
2719 int off = 5 + (n_elif - i - 1) * 4; |
|
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|
2720 asdl_seq *newobj = asdl_seq_new(1, c->c_arena); |
|
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|
2721 if (!newobj) |
|
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|
2722 return NULL; |
| 35742 | 2723 expression = ast_for_expr(c, CHILD(n, off)); |
|
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|
2724 if (!expression) |
| 35742 | 2725 return NULL; |
| 2726 suite_seq = ast_for_suite(c, CHILD(n, off + 2)); | |
|
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|
2727 if (!suite_seq) |
| 35742 | 2728 return NULL; |
| 2729 | |
|
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|
2730 asdl_seq_SET(newobj, 0, |
|
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|
2731 If(expression, suite_seq, orelse, |
|
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|
2732 LINENO(CHILD(n, off)), |
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|
2733 CHILD(n, off)->n_col_offset, c->c_arena)); |
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2734 orelse = newobj; |
|
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2735 } |
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2736 expression = ast_for_expr(c, CHILD(n, 1)); |
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2737 if (!expression) |
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|
2738 return NULL; |
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|
2739 suite_seq = ast_for_suite(c, CHILD(n, 3)); |
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2740 if (!suite_seq) |
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2741 return NULL; |
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|
2742 return If(expression, suite_seq, orelse, |
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|
2743 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2744 } |
|
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2745 |
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|
2746 PyErr_Format(PyExc_SystemError, |
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|
2747 "unexpected token in 'if' statement: %s", s); |
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|
2748 return NULL; |
| 35742 | 2749 } |
| 2750 | |
| 2751 static stmt_ty | |
| 2752 ast_for_while_stmt(struct compiling *c, const node *n) | |
| 2753 { | |
| 2754 /* while_stmt: 'while' test ':' suite ['else' ':' suite] */ | |
| 2755 REQ(n, while_stmt); | |
| 2756 | |
| 2757 if (NCH(n) == 4) { | |
| 2758 expr_ty expression; | |
| 2759 asdl_seq *suite_seq; | |
| 2760 | |
| 2761 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2762 if (!expression) | |
| 2763 return NULL; | |
| 2764 suite_seq = ast_for_suite(c, CHILD(n, 3)); | |
|
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|
2765 if (!suite_seq) |
| 35742 | 2766 return NULL; |
|
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2767 return While(expression, suite_seq, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2768 } |
| 2769 else if (NCH(n) == 7) { | |
| 2770 expr_ty expression; | |
| 2771 asdl_seq *seq1, *seq2; | |
| 2772 | |
| 2773 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2774 if (!expression) | |
| 2775 return NULL; | |
| 2776 seq1 = ast_for_suite(c, CHILD(n, 3)); | |
|
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|
2777 if (!seq1) |
| 35742 | 2778 return NULL; |
| 2779 seq2 = ast_for_suite(c, CHILD(n, 6)); | |
|
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|
2780 if (!seq2) |
| 35742 | 2781 return NULL; |
| 2782 | |
|
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2783 return While(expression, seq1, seq2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2784 } |
|
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|
2785 |
|
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|
2786 PyErr_Format(PyExc_SystemError, |
|
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|
2787 "wrong number of tokens for 'while' statement: %d", |
|
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|
2788 NCH(n)); |
|
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|
2789 return NULL; |
| 35742 | 2790 } |
| 2791 | |
| 2792 static stmt_ty | |
| 2793 ast_for_for_stmt(struct compiling *c, const node *n) | |
| 2794 { | |
|
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2795 asdl_seq *_target, *seq = NULL, *suite_seq; |
| 35742 | 2796 expr_ty expression; |
|
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|
2797 expr_ty target, first; |
|
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|
2798 const node *node_target; |
| 35742 | 2799 /* for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite] */ |
| 2800 REQ(n, for_stmt); | |
| 2801 | |
| 2802 if (NCH(n) == 9) { | |
|
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2803 seq = ast_for_suite(c, CHILD(n, 8)); |
| 35742 | 2804 if (!seq) |
| 2805 return NULL; | |
| 2806 } | |
| 2807 | |
|
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|
2808 node_target = CHILD(n, 1); |
|
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|
2809 _target = ast_for_exprlist(c, node_target, Store); |
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2810 if (!_target) |
| 35742 | 2811 return NULL; |
|
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2812 /* Check the # of children rather than the length of _target, since |
|
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2813 for x, in ... has 1 element in _target, but still requires a Tuple. */ |
|
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|
2814 first = (expr_ty)asdl_seq_GET(_target, 0); |
|
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2815 if (NCH(node_target) == 1) |
|
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2816 target = first; |
| 35742 | 2817 else |
|
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|
2818 target = Tuple(_target, Store, first->lineno, first->col_offset, c->c_arena); |
| 35742 | 2819 |
|
35798
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Write a separate ast_for_testlist_gexp() function instead of overloading
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|
2820 expression = ast_for_testlist(c, CHILD(n, 3)); |
|
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|
2821 if (!expression) |
| 35742 | 2822 return NULL; |
| 2823 suite_seq = ast_for_suite(c, CHILD(n, 5)); | |
|
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|
2824 if (!suite_seq) |
| 35742 | 2825 return NULL; |
| 2826 | |
|
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|
2827 return For(target, expression, suite_seq, seq, LINENO(n), n->n_col_offset, |
|
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|
2828 c->c_arena); |
| 35742 | 2829 } |
| 2830 | |
| 2831 static excepthandler_ty | |
| 2832 ast_for_except_clause(struct compiling *c, const node *exc, node *body) | |
| 2833 { | |
|
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|
2834 /* except_clause: 'except' [test ['as' test]] */ |
| 35742 | 2835 REQ(exc, except_clause); |
| 2836 REQ(body, suite); | |
| 2837 | |
| 2838 if (NCH(exc) == 1) { | |
| 2839 asdl_seq *suite_seq = ast_for_suite(c, body); | |
| 2840 if (!suite_seq) | |
| 2841 return NULL; | |
| 2842 | |
|
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|
2843 return ExceptHandler(NULL, NULL, suite_seq, LINENO(exc), |
|
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|
2844 exc->n_col_offset, c->c_arena); |
| 35742 | 2845 } |
| 2846 else if (NCH(exc) == 2) { | |
| 2847 expr_ty expression; | |
| 2848 asdl_seq *suite_seq; | |
| 2849 | |
| 2850 expression = ast_for_expr(c, CHILD(exc, 1)); | |
| 2851 if (!expression) | |
| 2852 return NULL; | |
| 2853 suite_seq = ast_for_suite(c, body); | |
|
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|
2854 if (!suite_seq) |
| 35742 | 2855 return NULL; |
| 2856 | |
|
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|
2857 return ExceptHandler(expression, NULL, suite_seq, LINENO(exc), |
|
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|
2858 exc->n_col_offset, c->c_arena); |
| 35742 | 2859 } |
| 2860 else if (NCH(exc) == 4) { | |
| 2861 asdl_seq *suite_seq; | |
| 2862 expr_ty expression; | |
|
40588
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Some more changes related to the new except syntax and semantics,
Guido van Rossum <guido@python.org>
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|
2863 identifier e = NEW_IDENTIFIER(CHILD(exc, 3)); |
|
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|
2864 if (!e) |
| 35742 | 2865 return NULL; |
|
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|
2866 if (forbidden_name(e, CHILD(exc, 3), 0)) |
|
c45e331238ae
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|
2867 return NULL; |
|
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|
2868 expression = ast_for_expr(c, CHILD(exc, 1)); |
|
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|
2869 if (!expression) |
|
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|
2870 return NULL; |
| 35742 | 2871 suite_seq = ast_for_suite(c, body); |
|
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|
2872 if (!suite_seq) |
| 35742 | 2873 return NULL; |
| 2874 | |
|
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|
2875 return ExceptHandler(expression, e, suite_seq, LINENO(exc), |
|
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|
2876 exc->n_col_offset, c->c_arena); |
| 35742 | 2877 } |
|
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|
2878 |
|
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changeset
|
2879 PyErr_Format(PyExc_SystemError, |
|
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diff
changeset
|
2880 "wrong number of children for 'except' clause: %d", |
|
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changeset
|
2881 NCH(exc)); |
|
de16a85c3b4c
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changeset
|
2882 return NULL; |
| 35742 | 2883 } |
| 2884 | |
| 2885 static stmt_ty | |
| 2886 ast_for_try_stmt(struct compiling *c, const node *n) | |
| 2887 { | |
|
36066
719ba02d2e2c
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diff
changeset
|
2888 const int nch = NCH(n); |
|
719ba02d2e2c
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parents:
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diff
changeset
|
2889 int n_except = (nch - 3)/3; |
|
719ba02d2e2c
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parents:
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diff
changeset
|
2890 asdl_seq *body, *orelse = NULL, *finally = NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
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diff
changeset
|
2891 |
| 35742 | 2892 REQ(n, try_stmt); |
| 2893 | |
|
36066
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diff
changeset
|
2894 body = ast_for_suite(c, CHILD(n, 2)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2895 if (body == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
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diff
changeset
|
2896 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2897 |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2898 if (TYPE(CHILD(n, nch - 3)) == NAME) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2899 if (strcmp(STR(CHILD(n, nch - 3)), "finally") == 0) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2900 if (nch >= 9 && TYPE(CHILD(n, nch - 6)) == NAME) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2901 /* we can assume it's an "else", |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2902 because nch >= 9 for try-else-finally and |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2903 it would otherwise have a type of except_clause */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2904 orelse = ast_for_suite(c, CHILD(n, nch - 4)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2905 if (orelse == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2906 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2907 n_except--; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2908 } |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2909 |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2910 finally = ast_for_suite(c, CHILD(n, nch - 1)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2911 if (finally == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2912 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2913 n_except--; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2914 } |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2915 else { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2916 /* we can assume it's an "else", |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2917 otherwise it would have a type of except_clause */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2918 orelse = ast_for_suite(c, CHILD(n, nch - 1)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2919 if (orelse == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2920 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2921 n_except--; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2922 } |
| 35742 | 2923 } |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2924 else if (TYPE(CHILD(n, nch - 3)) != except_clause) { |
|
35867
f4842f42700b
remove useless debug print helper. fix a couple of exceptions
Neal Norwitz <nnorwitz@gmail.com>
parents:
35799
diff
changeset
|
2925 ast_error(n, "malformed 'try' statement"); |
| 35742 | 2926 return NULL; |
| 2927 } | |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2928 |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2929 if (n_except > 0) { |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2930 int i; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2931 stmt_ty except_st; |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2932 /* process except statements to create a try ... except */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2933 asdl_seq *handlers = asdl_seq_new(n_except, c->c_arena); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2934 if (handlers == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2935 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2936 |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2937 for (i = 0; i < n_except; i++) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2938 excepthandler_ty e = ast_for_except_clause(c, CHILD(n, 3 + i * 3), |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2939 CHILD(n, 5 + i * 3)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2940 if (!e) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2941 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2942 asdl_seq_SET(handlers, i, e); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2943 } |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2944 |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2945 except_st = TryExcept(body, handlers, orelse, LINENO(n), |
|
37879
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
36877
diff
changeset
|
2946 n->n_col_offset, c->c_arena); |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2947 if (!finally) |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2948 return except_st; |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2949 |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2950 /* if a 'finally' is present too, we nest the TryExcept within a |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2951 TryFinally to emulate try ... except ... finally */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2952 body = asdl_seq_new(1, c->c_arena); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2953 if (body == NULL) |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2954 return NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2955 asdl_seq_SET(body, 0, except_st); |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2956 } |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2957 |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2958 /* must be a try ... finally (except clauses are in body, if any exist) */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2959 assert(finally != NULL); |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2960 return TryFinally(body, finally, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2961 } |
| 2962 | |
|
54338
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
53707
diff
changeset
|
2963 /* with_item: test ['as' expr] */ |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2964 static stmt_ty |
|
54338
287ce30d08b5
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parents:
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diff
changeset
|
2965 ast_for_with_item(struct compiling *c, const node *n, asdl_seq *content) |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2966 { |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2967 expr_ty context_expr, optional_vars = NULL; |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2968 |
|
54338
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diff
changeset
|
2969 REQ(n, with_item); |
|
287ce30d08b5
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parents:
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diff
changeset
|
2970 context_expr = ast_for_expr(c, CHILD(n, 0)); |
|
64183
54c9c86ad104
Merged revisions 84209 via svnmerge from
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents:
62647
diff
changeset
|
2971 if (!context_expr) |
|
54c9c86ad104
Merged revisions 84209 via svnmerge from
Amaury Forgeot d'Arc <amauryfa@gmail.com>
parents:
62647
diff
changeset
|
2972 return NULL; |
|
54338
287ce30d08b5
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diff
changeset
|
2973 if (NCH(n) == 3) { |
|
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diff
changeset
|
2974 optional_vars = ast_for_expr(c, CHILD(n, 2)); |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
2975 |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2976 if (!optional_vars) { |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2977 return NULL; |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2978 } |
|
46664
031dfe455585
Merged revisions 62425-62429,62434-62436,62441,62444,62446-62448,62450-62455,62463,62465-62466,62469,62474,62476-62478,62480,62485,62492,62497-62498,62500,62507,62513-62514,62516,62521,62531,62535,62545-62546,62548-62551,62553-62559,62569,62574,62577,62593,62595,62604-62606,62608,62616,62626-62627,62636,62638,62644-62645,62647-62648,62651-62653,62656,62661,62663,62680,62686-62687,62696,62699-62703,62711 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents:
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diff
changeset
|
2979 if (!set_context(c, optional_vars, Store, n)) { |
|
40450
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diff
changeset
|
2980 return NULL; |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2981 } |
|
36695
b6d2f6fd3e11
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Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
2982 } |
|
b6d2f6fd3e11
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Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
2983 |
|
54338
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diff
changeset
|
2984 return With(context_expr, optional_vars, content, LINENO(n), |
|
287ce30d08b5
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diff
changeset
|
2985 n->n_col_offset, c->c_arena); |
|
287ce30d08b5
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diff
changeset
|
2986 } |
|
287ce30d08b5
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diff
changeset
|
2987 |
|
287ce30d08b5
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diff
changeset
|
2988 /* with_stmt: 'with' with_item (',' with_item)* ':' suite */ |
|
287ce30d08b5
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diff
changeset
|
2989 static stmt_ty |
|
287ce30d08b5
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diff
changeset
|
2990 ast_for_with_stmt(struct compiling *c, const node *n) |
|
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changeset
|
2991 { |
|
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parents:
53707
diff
changeset
|
2992 int i; |
|
287ce30d08b5
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diff
changeset
|
2993 stmt_ty ret; |
|
287ce30d08b5
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diff
changeset
|
2994 asdl_seq *inner; |
|
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changeset
|
2995 |
|
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changeset
|
2996 REQ(n, with_stmt); |
|
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diff
changeset
|
2997 |
|
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changeset
|
2998 /* process the with items inside-out */ |
|
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53707
diff
changeset
|
2999 i = NCH(n) - 1; |
|
287ce30d08b5
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parents:
53707
diff
changeset
|
3000 /* the suite of the innermost with item is the suite of the with stmt */ |
|
287ce30d08b5
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changeset
|
3001 inner = ast_for_suite(c, CHILD(n, i)); |
|
287ce30d08b5
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Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3002 if (!inner) |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3003 return NULL; |
|
54338
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Georg Brandl <georg@python.org>
parents:
53707
diff
changeset
|
3004 |
|
287ce30d08b5
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Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3005 for (;;) { |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
53707
diff
changeset
|
3006 i -= 2; |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3007 ret = ast_for_with_item(c, CHILD(n, i), inner); |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3008 if (!ret) |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3009 return NULL; |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3010 /* was this the last item? */ |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3011 if (i == 1) |
|
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Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3012 break; |
|
287ce30d08b5
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Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3013 /* if not, wrap the result so far in a new sequence */ |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3014 inner = asdl_seq_new(1, c->c_arena); |
|
287ce30d08b5
Merged revisions 72924 via svnmerge from
Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3015 if (!inner) |
|
287ce30d08b5
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Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3016 return NULL; |
|
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Georg Brandl <georg@python.org>
parents:
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diff
changeset
|
3017 asdl_seq_SET(inner, 0, ret); |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3018 } |
|
54338
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|
3019 |
|
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parents:
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diff
changeset
|
3020 return ret; |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3021 } |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3022 |
| 35742 | 3023 static stmt_ty |
|
41824
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parents:
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|
3024 ast_for_classdef(struct compiling *c, const node *n, asdl_seq *decorator_seq) |
| 35742 | 3025 { |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3026 /* classdef: 'class' NAME ['(' arglist ')'] ':' suite */ |
|
49844
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changeset
|
3027 PyObject *classname; |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3028 asdl_seq *s; |
|
49852
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3029 expr_ty call; |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
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changeset
|
3030 |
| 35742 | 3031 REQ(n, classdef); |
| 3032 | |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3033 if (NCH(n) == 4) { /* class NAME ':' suite */ |
| 35742 | 3034 s = ast_for_suite(c, CHILD(n, 3)); |
| 3035 if (!s) | |
| 3036 return NULL; | |
|
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|
3037 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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|
3038 if (!classname) |
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|
3039 return NULL; |
|
54954
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
3040 if (forbidden_name(classname, CHILD(n, 3), 0)) |
|
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
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diff
changeset
|
3041 return NULL; |
|
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|
3042 return ClassDef(classname, NULL, NULL, NULL, NULL, s, decorator_seq, |
|
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|
3043 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3044 } |
|
41226
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parents:
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diff
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|
3045 |
|
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
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parents:
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changeset
|
3046 if (TYPE(CHILD(n, 3)) == RPAR) { /* class NAME '(' ')' ':' suite */ |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
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changeset
|
3047 s = ast_for_suite(c, CHILD(n,5)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
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|
3048 if (!s) |
|
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|
3049 return NULL; |
|
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changeset
|
3050 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
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changeset
|
3051 if (!classname) |
|
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parents:
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changeset
|
3052 return NULL; |
|
54954
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
3053 if (forbidden_name(classname, CHILD(n, 3), 0)) |
|
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
3054 return NULL; |
|
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|
3055 return ClassDef(classname, NULL, NULL, NULL, NULL, s, decorator_seq, |
|
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changeset
|
3056 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3057 } |
| 3058 | |
|
41226
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Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3059 /* class NAME '(' arglist ')' ':' suite */ |
|
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3060 /* build up a fake Call node so we can extract its pieces */ |
|
49852
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Benjamin Peterson <benjamin@python.org>
parents:
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|
3061 { |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3062 PyObject *dummy_name; |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3063 expr_ty dummy; |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3064 dummy_name = NEW_IDENTIFIER(CHILD(n, 1)); |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
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parents:
49847
diff
changeset
|
3065 if (!dummy_name) |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3066 return NULL; |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3067 dummy = Name(dummy_name, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
30d01a5f517e
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Benjamin Peterson <benjamin@python.org>
parents:
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diff
changeset
|
3068 call = ast_for_call(c, CHILD(n, 3), dummy); |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
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diff
changeset
|
3069 if (!call) |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
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parents:
49847
diff
changeset
|
3070 return NULL; |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
49847
diff
changeset
|
3071 } |
| 35742 | 3072 s = ast_for_suite(c, CHILD(n, 6)); |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
3073 if (!s) |
| 35742 | 3074 return NULL; |
|
49844
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changeset
|
3075 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
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diff
changeset
|
3076 if (!classname) |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
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parents:
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diff
changeset
|
3077 return NULL; |
|
54954
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
3078 if (forbidden_name(classname, CHILD(n, 1), 0)) |
|
c45e331238ae
In most cases, the parser will protect True, False, and None from being assign to.
Benjamin Peterson <benjamin@python.org>
parents:
54918
diff
changeset
|
3079 return NULL; |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3080 |
|
49844
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changeset
|
3081 return ClassDef(classname, call->v.Call.args, call->v.Call.keywords, |
|
41226
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Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3082 call->v.Call.starargs, call->v.Call.kwargs, s, |
|
41824
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parents:
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diff
changeset
|
3083 decorator_seq, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3084 } |
| 3085 | |
| 3086 static stmt_ty | |
| 3087 ast_for_stmt(struct compiling *c, const node *n) | |
| 3088 { | |
| 3089 if (TYPE(n) == stmt) { | |
|
40450
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40215
diff
changeset
|
3090 assert(NCH(n) == 1); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
3091 n = CHILD(n, 0); |
| 35742 | 3092 } |
| 3093 if (TYPE(n) == simple_stmt) { | |
|
40450
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40215
diff
changeset
|
3094 assert(num_stmts(n) == 1); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3095 n = CHILD(n, 0); |
| 35742 | 3096 } |
| 3097 if (TYPE(n) == small_stmt) { | |
|
40529
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
Neal Norwitz <nnorwitz@gmail.com>
parents:
40450
diff
changeset
|
3098 n = CHILD(n, 0); |
|
40965
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
3099 /* small_stmt: expr_stmt | del_stmt | pass_stmt | flow_stmt |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
3100 | import_stmt | global_stmt | nonlocal_stmt | assert_stmt |
|
40450
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|
3101 */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3102 switch (TYPE(n)) { |
| 35742 | 3103 case expr_stmt: |
| 3104 return ast_for_expr_stmt(c, n); | |
| 3105 case del_stmt: | |
| 3106 return ast_for_del_stmt(c, n); | |
| 3107 case pass_stmt: | |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
3108 return Pass(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3109 case flow_stmt: |
| 3110 return ast_for_flow_stmt(c, n); | |
| 3111 case import_stmt: | |
| 3112 return ast_for_import_stmt(c, n); | |
| 3113 case global_stmt: | |
| 3114 return ast_for_global_stmt(c, n); | |
|
40965
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
3115 case nonlocal_stmt: |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
3116 return ast_for_nonlocal_stmt(c, n); |
| 35742 | 3117 case assert_stmt: |
| 3118 return ast_for_assert_stmt(c, n); | |
| 3119 default: | |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
3120 PyErr_Format(PyExc_SystemError, |
| 35742 | 3121 "unhandled small_stmt: TYPE=%d NCH=%d\n", |
| 3122 TYPE(n), NCH(n)); | |
| 3123 return NULL; | |
| 3124 } | |
| 3125 } | |
| 3126 else { | |
| 3127 /* compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | |
|
41824
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changeset
|
3128 | funcdef | classdef | decorated |
|
40450
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parents:
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diff
changeset
|
3129 */ |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3130 node *ch = CHILD(n, 0); |
|
cc992d75d5b3
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parents:
40215
diff
changeset
|
3131 REQ(n, compound_stmt); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3132 switch (TYPE(ch)) { |
| 35742 | 3133 case if_stmt: |
| 3134 return ast_for_if_stmt(c, ch); | |
| 3135 case while_stmt: | |
| 3136 return ast_for_while_stmt(c, ch); | |
| 3137 case for_stmt: | |
| 3138 return ast_for_for_stmt(c, ch); | |
| 3139 case try_stmt: | |
| 3140 return ast_for_try_stmt(c, ch); | |
|
36695
b6d2f6fd3e11
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Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3141 case with_stmt: |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3142 return ast_for_with_stmt(c, ch); |
| 35742 | 3143 case funcdef: |
|
41824
24b60622b944
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parents:
41717
diff
changeset
|
3144 return ast_for_funcdef(c, ch, NULL); |
| 35742 | 3145 case classdef: |
|
41824
24b60622b944
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Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3146 return ast_for_classdef(c, ch, NULL); |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
3147 case decorated: |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
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parents:
56955
diff
changeset
|
3148 return ast_for_decorated(c, ch); |
| 35742 | 3149 default: |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
3150 PyErr_Format(PyExc_SystemError, |
| 35742 | 3151 "unhandled small_stmt: TYPE=%d NCH=%d\n", |
| 3152 TYPE(n), NCH(n)); | |
| 3153 return NULL; | |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3154 } |
| 35742 | 3155 } |
| 3156 } | |
| 3157 | |
| 3158 static PyObject * | |
|
46664
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|
3159 parsenumber(struct compiling *c, const char *s) |
| 35742 | 3160 { |
|
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|
3161 const char *end; |
|
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|
3162 long x; |
|
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|
3163 double dx; |
|
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|
3164 Py_complex compl; |
|
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3165 int imflag; |
| 35742 | 3166 |
|
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3167 assert(s != NULL); |
|
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3168 errno = 0; |
|
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3169 end = s + strlen(s) - 1; |
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3170 imflag = *end == 'j' || *end == 'J'; |
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3171 if (s[0] == '0') { |
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3172 x = (long) PyOS_strtoul((char *)s, (char **)&end, 0); |
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3173 if (x < 0 && errno == 0) { |
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3174 return PyLong_FromString((char *)s, |
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3175 (char **)0, |
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|
3176 0); |
|
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3177 } |
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3178 } |
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3179 else |
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3180 x = PyOS_strtol((char *)s, (char **)&end, 0); |
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3181 if (*end == '\0') { |
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3182 if (errno != 0) |
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3183 return PyLong_FromString((char *)s, (char **)0, 0); |
|
44099
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|
3184 return PyLong_FromLong(x); |
|
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3185 } |
|
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3186 /* XXX Huge floats may silently fail */ |
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3187 if (imflag) { |
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|
3188 compl.real = 0.; |
|
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|
3189 compl.imag = PyOS_string_to_double(s, (char **)&end, NULL); |
|
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|
3190 if (compl.imag == -1.0 && PyErr_Occurred()) |
|
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|
3191 return NULL; |
|
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|
3192 return PyComplex_FromCComplex(compl); |
|
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3193 } |
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3194 else |
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|
3195 { |
|
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|
3196 dx = PyOS_string_to_double(s, NULL, NULL); |
|
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|
3197 if (dx == -1.0 && PyErr_Occurred()) |
|
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|
3198 return NULL; |
|
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|
3199 return PyFloat_FromDouble(dx); |
|
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3200 } |
| 35742 | 3201 } |
| 3202 | |
| 3203 static PyObject * | |
|
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|
3204 decode_utf8(struct compiling *c, const char **sPtr, const char *end, char* encoding) |
| 35742 | 3205 { |
|
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3206 PyObject *u, *v; |
|
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|
3207 char *s, *t; |
|
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|
3208 t = s = (char *)*sPtr; |
|
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|
3209 /* while (s < end && *s != '\\') s++; */ /* inefficient for u".." */ |
|
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|
3210 while (s < end && (*s & 0x80)) s++; |
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|
3211 *sPtr = s; |
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3212 u = PyUnicode_DecodeUTF8(t, s - t, NULL); |
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3213 if (u == NULL) |
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3214 return NULL; |
|
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|
3215 v = PyUnicode_AsEncodedString(u, encoding, NULL); |
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|
3216 Py_DECREF(u); |
|
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|
3217 return v; |
| 35742 | 3218 } |
| 3219 | |
| 3220 static PyObject * | |
|
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|
3221 decode_unicode(struct compiling *c, const char *s, size_t len, int rawmode, const char *encoding) |
| 35742 | 3222 { |
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3223 PyObject *v, *u; |
|
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|
3224 char *buf; |
|
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|
3225 char *p; |
|
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|
3226 const char *end; |
|
43819
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|
3227 |
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3228 if (encoding == NULL) { |
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3229 buf = (char *)s; |
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3230 u = NULL; |
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|
3231 } else { |
|
48330
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|
3232 /* check for integer overflow */ |
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3233 if (len > PY_SIZE_MAX / 6) |
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3234 return NULL; |
|
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|
3235 /* "ä" (2 bytes) may become "\U000000E4" (10 bytes), or 1:5 |
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3236 "\ä" (3 bytes) may become "\u005c\U000000E4" (16 bytes), or ~1:6 */ |
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3237 u = PyBytes_FromStringAndSize((char *)NULL, len * 6); |
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3238 if (u == NULL) |
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3239 return NULL; |
|
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|
3240 p = buf = PyBytes_AsString(u); |
|
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3241 end = s + len; |
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3242 while (s < end) { |
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|
3243 if (*s == '\\') { |
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3244 *p++ = *s++; |
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|
3245 if (*s & 0x80) { |
|
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|
3246 strcpy(p, "u005c"); |
|
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|
3247 p += 5; |
|
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|
3248 } |
|
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3249 } |
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|
3250 if (*s & 0x80) { /* XXX inefficient */ |
|
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|
3251 PyObject *w; |
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|
3252 char *r; |
|
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|
3253 Py_ssize_t rn, i; |
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|
3254 w = decode_utf8(c, &s, end, "utf-32-be"); |
|
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3255 if (w == NULL) { |
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|
3256 Py_DECREF(u); |
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|
3257 return NULL; |
|
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|
3258 } |
|
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|
3259 r = PyBytes_AS_STRING(w); |
|
44351
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#1629: Renamed Py_Size, Py_Type and Py_Refcnt to Py_SIZE, Py_TYPE and Py_REFCNT.
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|
3260 rn = Py_SIZE(w); |
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|
3261 assert(rn % 4 == 0); |
|
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|
3262 for (i = 0; i < rn; i += 4) { |
|
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|
3263 sprintf(p, "\\U%02x%02x%02x%02x", |
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|
3264 r[i + 0] & 0xFF, |
|
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|
3265 r[i + 1] & 0xFF, |
|
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|
3266 r[i + 2] & 0xFF, |
|
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|
3267 r[i + 3] & 0xFF); |
|
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|
3268 p += 10; |
|
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|
3269 } |
|
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|
3270 /* Should be impossible to overflow */ |
|
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|
3271 assert(p - buf <= Py_SIZE(u)); |
|
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|
3272 Py_DECREF(w); |
|
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|
3273 } else { |
|
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3274 *p++ = *s++; |
|
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3275 } |
|
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3276 } |
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3277 len = p - buf; |
|
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3278 s = buf; |
|
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3279 } |
|
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|
3280 if (rawmode) |
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3281 v = PyUnicode_DecodeRawUnicodeEscape(s, len, NULL); |
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3282 else |
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3283 v = PyUnicode_DecodeUnicodeEscape(s, len, NULL); |
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|
3284 Py_XDECREF(u); |
|
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3285 return v; |
| 35742 | 3286 } |
| 3287 | |
| 3288 /* s is a Python string literal, including the bracketing quote characters, | |
|
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|
3289 * and r &/or b prefixes (if any), and embedded escape sequences (if any). |
| 35742 | 3290 * parsestr parses it, and returns the decoded Python string object. |
| 3291 */ | |
| 3292 static PyObject * | |
|
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3293 parsestr(struct compiling *c, const node *n, int *bytesmode) |
| 35742 | 3294 { |
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3295 size_t len; |
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3296 const char *s = STR(n); |
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3297 int quote = Py_CHARMASK(*s); |
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3298 int rawmode = 0; |
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3299 int need_encoding; |
|
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|
3300 if (isalpha(quote)) { |
|
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3301 if (quote == 'b' || quote == 'B') { |
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3302 quote = *++s; |
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|
3303 *bytesmode = 1; |
|
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3304 } |
|
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3305 if (quote == 'r' || quote == 'R') { |
|
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|
3306 quote = *++s; |
|
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|
3307 rawmode = 1; |
|
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|
3308 } |
|
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3309 } |
|
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3310 if (quote != '\'' && quote != '\"') { |
|
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|
3311 PyErr_BadInternalCall(); |
|
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3312 return NULL; |
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3313 } |
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|
3314 s++; |
|
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|
3315 len = strlen(s); |
|
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|
3316 if (len > INT_MAX) { |
|
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3317 PyErr_SetString(PyExc_OverflowError, |
|
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3318 "string to parse is too long"); |
|
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|
3319 return NULL; |
|
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3320 } |
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3321 if (s[--len] != quote) { |
|
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|
3322 PyErr_BadInternalCall(); |
|
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|
3323 return NULL; |
|
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3324 } |
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|
3325 if (len >= 4 && s[0] == quote && s[1] == quote) { |
|
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3326 s += 2; |
|
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3327 len -= 2; |
|
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3328 if (s[--len] != quote || s[--len] != quote) { |
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3329 PyErr_BadInternalCall(); |
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3330 return NULL; |
| 40894 | 3331 } |
|
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3332 } |
|
46306
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3333 if (!*bytesmode && !rawmode) { |
|
46664
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3334 return decode_unicode(c, s, len, rawmode, c->c_encoding); |
|
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3335 } |
|
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|
3336 if (*bytesmode) { |
|
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|
3337 /* Disallow non-ascii characters (but not escapes) */ |
|
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|
3338 const char *c; |
|
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3339 for (c = s; *c; c++) { |
|
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|
3340 if (Py_CHARMASK(*c) >= 0x80) { |
|
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|
3341 ast_error(n, "bytes can only contain ASCII " |
|
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|
3342 "literal characters."); |
|
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|
3343 return NULL; |
|
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3344 } |
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3345 } |
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|
3346 } |
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|
3347 need_encoding = (!*bytesmode && c->c_encoding != NULL && |
|
49539
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3348 strcmp(c->c_encoding, "utf-8") != 0); |
|
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3349 if (rawmode || strchr(s, '\\') == NULL) { |
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3350 if (need_encoding) { |
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|
3351 PyObject *v, *u = PyUnicode_DecodeUTF8(s, len, NULL); |
|
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|
3352 if (u == NULL || !*bytesmode) |
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3353 return u; |
|
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3354 v = PyUnicode_AsEncodedString(u, c->c_encoding, NULL); |
|
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3355 Py_DECREF(u); |
|
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3356 return v; |
|
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|
3357 } else if (*bytesmode) { |
|
47301
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|
3358 return PyBytes_FromStringAndSize(s, len); |
|
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3359 } else if (strcmp(c->c_encoding, "utf-8") == 0) { |
|
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|
3360 return PyUnicode_FromStringAndSize(s, len); |
|
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3361 } else { |
|
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|
3362 return PyUnicode_DecodeLatin1(s, len, NULL); |
|
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3363 } |
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3364 } |
|
47301
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|
3365 return PyBytes_DecodeEscape(s, len, NULL, 1, |
|
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|
3366 need_encoding ? c->c_encoding : NULL); |
| 35742 | 3367 } |
| 3368 | |
|
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|
3369 /* Build a Python string object out of a STRING+ atom. This takes care of |
| 35742 | 3370 * compile-time literal catenation, calling parsestr() on each piece, and |
| 3371 * pasting the intermediate results together. | |
| 3372 */ | |
| 3373 static PyObject * | |
| 40894 | 3374 parsestrplus(struct compiling *c, const node *n, int *bytesmode) |
| 35742 | 3375 { |
|
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3376 PyObject *v; |
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3377 int i; |
|
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|
3378 REQ(CHILD(n, 0), STRING); |
|
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|
3379 v = parsestr(c, CHILD(n, 0), bytesmode); |
|
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Guido van Rossum <guido@python.org>
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3380 if (v != NULL) { |
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3381 /* String literal concatenation */ |
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3382 for (i = 1; i < NCH(n); i++) { |
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3383 PyObject *s; |
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3384 int subbm = 0; |
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3385 s = parsestr(c, CHILD(n, i), &subbm); |
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3386 if (s == NULL) |
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3387 goto onError; |
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3388 if (*bytesmode != subbm) { |
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Minimal change that disables (AFAICT) the interpolation of \u and \U inside
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3389 ast_error(n, "cannot mix bytes and nonbytes literals"); |
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3390 goto onError; |
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3391 } |
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47301
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Renamed PyString to PyBytes
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3392 if (PyBytes_Check(v) && PyBytes_Check(s)) { |
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23ab586c427a
Renamed PyString to PyBytes
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3393 PyBytes_ConcatAndDel(&v, s); |
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3394 if (v == NULL) |
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3395 goto onError; |
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3396 } |
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3397 else { |
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3398 PyObject *temp = PyUnicode_Concat(v, s); |
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3399 Py_DECREF(s); |
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3400 Py_DECREF(v); |
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3401 v = temp; |
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3402 if (v == NULL) |
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3403 goto onError; |
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3404 } |
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40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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3405 } |
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3406 } |
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3407 return v; |
| 35742 | 3408 |
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3409 onError: |
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3410 Py_XDECREF(v); |
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3411 return NULL; |
| 35742 | 3412 } |