Mercurial > cpython-lru_cache-weakref
annotate Python/ast.c @ 67467:abe201dfd3dc 3.1
Merged revisions 87861,87863 via svnmerge from
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r87861 | antoine.pitrou | 2011-01-08 11:23:29 +0100 (sam., 08 janv. 2011) | 3 lines
Fix test_ssl after r87849
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r87863 | antoine.pitrou | 2011-01-08 11:28:11 +0100 (sam., 08 janv. 2011) | 3 lines
Add EHOSTUNREACH ('No route to host') to the errnos trapped by transient_internet().
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| author | Antoine Pitrou <solipsis@pitrou.net> |
|---|---|
| date | Sat, 08 Jan 2011 10:31:09 +0000 |
| parents | 42b84d3188d1 |
| children | 4d9a8e84279a 3c9232a684ae |
| 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" | |
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10 #include "pyarena.h" |
| 35742 | 11 #include "ast.h" |
| 12 #include "token.h" | |
| 13 #include "parsetok.h" | |
| 14 #include "graminit.h" | |
| 15 | |
| 16 #include <assert.h> | |
| 17 | |
| 18 /* Data structure used internally */ | |
| 19 struct compiling { | |
|
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20 char *c_encoding; /* source encoding */ |
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21 PyArena *c_arena; /* arena for allocating memeory */ |
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22 const char *c_filename; /* filename */ |
| 35742 | 23 }; |
| 24 | |
| 25 static asdl_seq *seq_for_testlist(struct compiling *, const node *); | |
| 26 static expr_ty ast_for_expr(struct compiling *, const node *); | |
| 27 static stmt_ty ast_for_stmt(struct compiling *, const node *); | |
| 28 static asdl_seq *ast_for_suite(struct compiling *, const node *); | |
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29 static asdl_seq *ast_for_exprlist(struct compiling *, const node *, |
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30 expr_context_ty); |
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31 static expr_ty ast_for_testlist(struct compiling *, const node *); |
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32 static stmt_ty ast_for_classdef(struct compiling *, const node *, asdl_seq *); |
| 35742 | 33 |
| 34 /* Note different signature for ast_for_call */ | |
| 35 static expr_ty ast_for_call(struct compiling *, const node *, expr_ty); | |
| 36 | |
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37 static PyObject *parsenumber(struct compiling *, const char *); |
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38 static PyObject *parsestr(struct compiling *, const node *n, int *bytesmode); |
| 40894 | 39 static PyObject *parsestrplus(struct compiling *, const node *n, |
| 40 int *bytesmode); | |
| 35742 | 41 |
| 42 #ifndef LINENO | |
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43 #define LINENO(n) ((n)->n_lineno) |
| 35742 | 44 #endif |
| 45 | |
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46 #define COMP_GENEXP 0 |
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47 #define COMP_LISTCOMP 1 |
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48 #define COMP_SETCOMP 2 |
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49 |
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50 static identifier |
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51 new_identifier(const char* n, PyArena *arena) |
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52 { |
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53 PyObject* id = PyUnicode_DecodeUTF8(n, strlen(n), NULL); |
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54 Py_UNICODE *u; |
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55 if (!id) |
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56 return NULL; |
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57 u = PyUnicode_AS_UNICODE(id); |
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58 /* Check whether there are non-ASCII characters in the |
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59 identifier; if so, normalize to NFKC. */ |
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60 for (; *u; u++) { |
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61 if (*u >= 128) { |
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62 PyObject *m = PyImport_ImportModuleNoBlock("unicodedata"); |
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63 PyObject *id2; |
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64 if (!m) |
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65 return NULL; |
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66 id2 = PyObject_CallMethod(m, "normalize", "sO", "NFKC", id); |
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67 Py_DECREF(m); |
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68 if (!id2) |
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69 return NULL; |
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70 Py_DECREF(id); |
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71 id = id2; |
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72 break; |
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73 } |
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74 } |
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75 PyUnicode_InternInPlace(&id); |
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76 PyArena_AddPyObject(arena, id); |
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77 return id; |
| 35742 | 78 } |
| 79 | |
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80 #define NEW_IDENTIFIER(n) new_identifier(STR(n), c->c_arena) |
| 35742 | 81 |
| 82 /* This routine provides an invalid object for the syntax error. | |
| 83 The outermost routine must unpack this error and create the | |
| 84 proper object. We do this so that we don't have to pass | |
| 85 the filename to everything function. | |
| 86 | |
| 87 XXX Maybe we should just pass the filename... | |
| 88 */ | |
| 89 | |
| 90 static int | |
| 91 ast_error(const node *n, const char *errstr) | |
| 92 { | |
| 93 PyObject *u = Py_BuildValue("zi", errstr, LINENO(n)); | |
| 94 if (!u) | |
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95 return 0; |
| 35742 | 96 PyErr_SetObject(PyExc_SyntaxError, u); |
| 97 Py_DECREF(u); | |
| 98 return 0; | |
| 99 } | |
| 100 | |
| 101 static void | |
| 102 ast_error_finish(const char *filename) | |
| 103 { | |
| 104 PyObject *type, *value, *tback, *errstr, *loc, *tmp; | |
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105 PyObject *filename_obj; |
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106 long lineno; |
| 35742 | 107 |
| 108 assert(PyErr_Occurred()); | |
| 109 if (!PyErr_ExceptionMatches(PyExc_SyntaxError)) | |
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110 return; |
| 35742 | 111 |
| 112 PyErr_Fetch(&type, &value, &tback); | |
| 113 errstr = PyTuple_GetItem(value, 0); | |
| 114 if (!errstr) | |
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115 return; |
| 35742 | 116 Py_INCREF(errstr); |
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117 lineno = PyLong_AsLong(PyTuple_GetItem(value, 1)); |
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118 if (lineno == -1) { |
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119 Py_DECREF(errstr); |
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120 return; |
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121 } |
| 35742 | 122 Py_DECREF(value); |
| 123 | |
| 124 loc = PyErr_ProgramText(filename, lineno); | |
| 125 if (!loc) { | |
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126 Py_INCREF(Py_None); |
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127 loc = Py_None; |
| 35742 | 128 } |
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129 if (filename != NULL) |
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130 filename_obj = PyUnicode_DecodeFSDefault(filename); |
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131 else { |
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132 Py_INCREF(Py_None); |
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133 filename_obj = Py_None; |
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134 } |
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135 if (filename_obj != NULL) |
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136 tmp = Py_BuildValue("(NlOO)", filename_obj, lineno, Py_None, loc); |
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137 else |
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138 tmp = NULL; |
| 35742 | 139 Py_DECREF(loc); |
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140 if (!tmp) { |
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141 Py_DECREF(errstr); |
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142 return; |
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143 } |
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144 value = PyTuple_Pack(2, errstr, tmp); |
| 35742 | 145 Py_DECREF(errstr); |
| 146 Py_DECREF(tmp); | |
| 147 if (!value) | |
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148 return; |
| 35742 | 149 PyErr_Restore(type, value, tback); |
| 150 } | |
| 151 | |
| 152 /* num_stmts() returns number of contained statements. | |
| 153 | |
| 154 Use this routine to determine how big a sequence is needed for | |
| 155 the statements in a parse tree. Its raison d'etre is this bit of | |
| 156 grammar: | |
| 157 | |
| 158 stmt: simple_stmt | compound_stmt | |
| 159 simple_stmt: small_stmt (';' small_stmt)* [';'] NEWLINE | |
| 160 | |
| 161 A simple_stmt can contain multiple small_stmt elements joined | |
| 162 by semicolons. If the arg is a simple_stmt, the number of | |
| 163 small_stmt elements is returned. | |
| 164 */ | |
| 165 | |
| 166 static int | |
| 167 num_stmts(const node *n) | |
| 168 { | |
| 169 int i, l; | |
| 170 node *ch; | |
| 171 | |
| 172 switch (TYPE(n)) { | |
| 173 case single_input: | |
| 174 if (TYPE(CHILD(n, 0)) == NEWLINE) | |
| 175 return 0; | |
| 176 else | |
| 177 return num_stmts(CHILD(n, 0)); | |
| 178 case file_input: | |
| 179 l = 0; | |
| 180 for (i = 0; i < NCH(n); i++) { | |
| 181 ch = CHILD(n, i); | |
| 182 if (TYPE(ch) == stmt) | |
| 183 l += num_stmts(ch); | |
| 184 } | |
| 185 return l; | |
| 186 case stmt: | |
| 187 return num_stmts(CHILD(n, 0)); | |
| 188 case compound_stmt: | |
| 189 return 1; | |
| 190 case simple_stmt: | |
| 191 return NCH(n) / 2; /* Divide by 2 to remove count of semi-colons */ | |
| 192 case suite: | |
| 193 if (NCH(n) == 1) | |
| 194 return num_stmts(CHILD(n, 0)); | |
| 195 else { | |
| 196 l = 0; | |
| 197 for (i = 2; i < (NCH(n) - 1); i++) | |
| 198 l += num_stmts(CHILD(n, i)); | |
| 199 return l; | |
| 200 } | |
| 201 default: { | |
| 202 char buf[128]; | |
| 203 | |
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204 sprintf(buf, "Non-statement found: %d %d", |
| 35742 | 205 TYPE(n), NCH(n)); |
| 206 Py_FatalError(buf); | |
| 207 } | |
| 208 } | |
| 209 assert(0); | |
| 210 return 0; | |
| 211 } | |
| 212 | |
| 213 /* Transform the CST rooted at node * to the appropriate AST | |
| 214 */ | |
| 215 | |
| 216 mod_ty | |
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217 PyAST_FromNode(const node *n, PyCompilerFlags *flags, const char *filename, |
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218 PyArena *arena) |
| 35742 | 219 { |
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220 int i, j, k, num; |
| 35742 | 221 asdl_seq *stmts = NULL; |
| 222 stmt_ty s; | |
| 223 node *ch; | |
| 224 struct compiling c; | |
| 225 | |
| 226 if (flags && flags->cf_flags & PyCF_SOURCE_IS_UTF8) { | |
|
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227 c.c_encoding = "utf-8"; |
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228 if (TYPE(n) == encoding_decl) { |
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229 #if 0 |
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230 ast_error(n, "encoding declaration in Unicode string"); |
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231 goto error; |
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232 #endif |
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233 n = CHILD(n, 0); |
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234 } |
| 35742 | 235 } else if (TYPE(n) == encoding_decl) { |
| 236 c.c_encoding = STR(n); | |
| 237 n = CHILD(n, 0); | |
| 238 } else { | |
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239 /* PEP 3120 */ |
| 42403 | 240 c.c_encoding = "utf-8"; |
| 35742 | 241 } |
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242 c.c_arena = arena; |
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243 c.c_filename = filename; |
| 35742 | 244 |
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245 k = 0; |
| 35742 | 246 switch (TYPE(n)) { |
| 247 case file_input: | |
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248 stmts = asdl_seq_new(num_stmts(n), arena); |
| 35742 | 249 if (!stmts) |
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250 return NULL; |
| 35742 | 251 for (i = 0; i < NCH(n) - 1; i++) { |
| 252 ch = CHILD(n, i); | |
| 253 if (TYPE(ch) == NEWLINE) | |
| 254 continue; | |
| 255 REQ(ch, stmt); | |
| 256 num = num_stmts(ch); | |
| 257 if (num == 1) { | |
| 258 s = ast_for_stmt(&c, ch); | |
| 259 if (!s) | |
| 260 goto error; | |
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261 asdl_seq_SET(stmts, k++, s); |
| 35742 | 262 } |
| 263 else { | |
| 264 ch = CHILD(ch, 0); | |
| 265 REQ(ch, simple_stmt); | |
| 266 for (j = 0; j < num; j++) { | |
| 267 s = ast_for_stmt(&c, CHILD(ch, j * 2)); | |
| 268 if (!s) | |
| 269 goto error; | |
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270 asdl_seq_SET(stmts, k++, s); |
| 35742 | 271 } |
| 272 } | |
| 273 } | |
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274 return Module(stmts, arena); |
| 35742 | 275 case eval_input: { |
| 276 expr_ty testlist_ast; | |
| 277 | |
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278 /* XXX Why not comp_for here? */ |
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279 testlist_ast = ast_for_testlist(&c, CHILD(n, 0)); |
| 35742 | 280 if (!testlist_ast) |
| 281 goto error; | |
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282 return Expression(testlist_ast, arena); |
| 35742 | 283 } |
| 284 case single_input: | |
| 285 if (TYPE(CHILD(n, 0)) == NEWLINE) { | |
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286 stmts = asdl_seq_new(1, arena); |
| 35742 | 287 if (!stmts) |
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288 goto error; |
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289 asdl_seq_SET(stmts, 0, Pass(n->n_lineno, n->n_col_offset, |
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290 arena)); |
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291 if (!asdl_seq_GET(stmts, 0)) |
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292 goto error; |
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293 return Interactive(stmts, arena); |
| 35742 | 294 } |
| 295 else { | |
| 296 n = CHILD(n, 0); | |
| 297 num = num_stmts(n); | |
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298 stmts = asdl_seq_new(num, arena); |
| 35742 | 299 if (!stmts) |
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300 goto error; |
| 35742 | 301 if (num == 1) { |
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302 s = ast_for_stmt(&c, n); |
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303 if (!s) |
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304 goto error; |
| 35742 | 305 asdl_seq_SET(stmts, 0, s); |
| 306 } | |
| 307 else { | |
| 308 /* Only a simple_stmt can contain multiple statements. */ | |
| 309 REQ(n, simple_stmt); | |
| 310 for (i = 0; i < NCH(n); i += 2) { | |
| 311 if (TYPE(CHILD(n, i)) == NEWLINE) | |
| 312 break; | |
| 313 s = ast_for_stmt(&c, CHILD(n, i)); | |
| 314 if (!s) | |
| 315 goto error; | |
| 316 asdl_seq_SET(stmts, i / 2, s); | |
| 317 } | |
| 318 } | |
| 319 | |
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320 return Interactive(stmts, arena); |
| 35742 | 321 } |
| 322 default: | |
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323 PyErr_Format(PyExc_SystemError, |
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324 "invalid node %d for PyAST_FromNode", TYPE(n)); |
| 35742 | 325 goto error; |
| 326 } | |
| 327 error: | |
| 328 ast_error_finish(filename); | |
| 329 return NULL; | |
| 330 } | |
| 331 | |
| 332 /* Return the AST repr. of the operator represented as syntax (|, ^, etc.) | |
| 333 */ | |
| 334 | |
| 335 static operator_ty | |
| 336 get_operator(const node *n) | |
| 337 { | |
| 338 switch (TYPE(n)) { | |
| 339 case VBAR: | |
| 340 return BitOr; | |
| 341 case CIRCUMFLEX: | |
| 342 return BitXor; | |
| 343 case AMPER: | |
| 344 return BitAnd; | |
| 345 case LEFTSHIFT: | |
| 346 return LShift; | |
| 347 case RIGHTSHIFT: | |
| 348 return RShift; | |
| 349 case PLUS: | |
| 350 return Add; | |
| 351 case MINUS: | |
| 352 return Sub; | |
| 353 case STAR: | |
| 354 return Mult; | |
| 355 case SLASH: | |
| 356 return Div; | |
| 357 case DOUBLESLASH: | |
| 358 return FloorDiv; | |
| 359 case PERCENT: | |
| 360 return Mod; | |
| 361 default: | |
|
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362 return (operator_ty)0; |
| 35742 | 363 } |
| 364 } | |
| 365 | |
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366 static const char* FORBIDDEN[] = { |
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367 "None", |
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368 "True", |
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369 "False", |
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370 "__debug__", |
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371 NULL, |
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372 }; |
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373 |
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374 static int |
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375 forbidden_name(expr_ty e, const node *n) |
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376 { |
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377 const char **p; |
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378 assert(PyUnicode_Check(e->v.Name.id)); |
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379 for (p = FORBIDDEN; *p; p++) { |
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380 if (PyUnicode_CompareWithASCIIString(e->v.Name.id, *p) == 0) { |
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381 ast_error(n, "assignment to keyword"); |
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382 return 1; |
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383 } |
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384 } |
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385 return 0; |
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386 } |
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387 |
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388 /* Set the context ctx for expr_ty e, recursively traversing e. |
| 35742 | 389 |
| 390 Only sets context for expr kinds that "can appear in assignment context" | |
| 391 (according to ../Parser/Python.asdl). For other expr kinds, it sets | |
| 392 an appropriate syntax error and returns false. | |
| 393 */ | |
| 394 | |
| 395 static int | |
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396 set_context(struct compiling *c, expr_ty e, expr_context_ty ctx, const node *n) |
| 35742 | 397 { |
| 398 asdl_seq *s = NULL; | |
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399 /* If a particular expression type can't be used for assign / delete, |
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400 set expr_name to its name and an error message will be generated. |
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401 */ |
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402 const char* expr_name = NULL; |
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403 |
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404 /* The ast defines augmented store and load contexts, but the |
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405 implementation here doesn't actually use them. The code may be |
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406 a little more complex than necessary as a result. It also means |
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407 that expressions in an augmented assignment have a Store context. |
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408 Consider restructuring so that augmented assignment uses |
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409 set_context(), too. |
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410 */ |
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411 assert(ctx != AugStore && ctx != AugLoad); |
| 35742 | 412 |
| 413 switch (e->kind) { | |
| 414 case Attribute_kind: | |
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415 e->v.Attribute.ctx = ctx; |
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416 break; |
| 35742 | 417 case Subscript_kind: |
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418 e->v.Subscript.ctx = ctx; |
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419 break; |
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420 case Starred_kind: |
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421 e->v.Starred.ctx = ctx; |
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422 if (!set_context(c, e->v.Starred.value, ctx, n)) |
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423 return 0; |
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424 break; |
| 35742 | 425 case Name_kind: |
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426 if (ctx == Store) { |
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427 if (forbidden_name(e, n)) |
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428 return 0; /* forbidden_name() calls ast_error() */ |
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429 } |
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430 e->v.Name.ctx = ctx; |
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431 break; |
| 35742 | 432 case List_kind: |
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433 e->v.List.ctx = ctx; |
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434 s = e->v.List.elts; |
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435 break; |
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437 if (asdl_seq_LEN(e->v.Tuple.elts) == 0) |
| 35742 | 438 return ast_error(n, "can't assign to ()"); |
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439 e->v.Tuple.ctx = ctx; |
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440 s = e->v.Tuple.elts; |
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442 case Lambda_kind: |
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443 expr_name = "lambda"; |
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444 break; |
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446 expr_name = "function call"; |
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447 break; |
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448 case BoolOp_kind: |
| 35742 | 449 case BinOp_kind: |
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450 case UnaryOp_kind: |
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451 expr_name = "operator"; |
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452 break; |
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454 expr_name = "generator expression"; |
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455 break; |
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456 case Yield_kind: |
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457 expr_name = "yield expression"; |
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458 break; |
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459 case ListComp_kind: |
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460 expr_name = "list comprehension"; |
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461 break; |
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462 case SetComp_kind: |
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463 expr_name = "set comprehension"; |
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464 break; |
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465 case DictComp_kind: |
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466 expr_name = "dict comprehension"; |
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467 break; |
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468 case Dict_kind: |
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469 case Set_kind: |
| 35742 | 470 case Num_kind: |
| 471 case Str_kind: | |
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472 expr_name = "literal"; |
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473 break; |
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474 case Ellipsis_kind: |
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475 expr_name = "Ellipsis"; |
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476 break; |
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477 case Compare_kind: |
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478 expr_name = "comparison"; |
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479 break; |
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480 case IfExp_kind: |
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481 expr_name = "conditional expression"; |
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482 break; |
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483 default: |
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484 PyErr_Format(PyExc_SystemError, |
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485 "unexpected expression in assignment %d (line %d)", |
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486 e->kind, e->lineno); |
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487 return 0; |
| 35742 | 488 } |
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489 /* Check for error string set by switch */ |
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490 if (expr_name) { |
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491 char buf[300]; |
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492 PyOS_snprintf(buf, sizeof(buf), |
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493 "can't %s %s", |
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494 ctx == Store ? "assign to" : "delete", |
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495 expr_name); |
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496 return ast_error(n, buf); |
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497 } |
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498 |
| 35742 | 499 /* If the LHS is a list or tuple, we need to set the assignment |
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500 context for all the contained elements. |
| 35742 | 501 */ |
| 502 if (s) { | |
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503 int i; |
| 35742 | 504 |
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505 for (i = 0; i < asdl_seq_LEN(s); i++) { |
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506 if (!set_context(c, (expr_ty)asdl_seq_GET(s, i), ctx, n)) |
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507 return 0; |
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508 } |
| 35742 | 509 } |
| 510 return 1; | |
| 511 } | |
| 512 | |
| 513 static operator_ty | |
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514 ast_for_augassign(struct compiling *c, const node *n) |
| 35742 | 515 { |
| 516 REQ(n, augassign); | |
| 517 n = CHILD(n, 0); | |
| 518 switch (STR(n)[0]) { | |
| 519 case '+': | |
| 520 return Add; | |
| 521 case '-': | |
| 522 return Sub; | |
| 523 case '/': | |
| 524 if (STR(n)[1] == '/') | |
| 525 return FloorDiv; | |
| 526 else | |
| 527 return Div; | |
| 528 case '%': | |
| 529 return Mod; | |
| 530 case '<': | |
| 531 return LShift; | |
| 532 case '>': | |
| 533 return RShift; | |
| 534 case '&': | |
| 535 return BitAnd; | |
| 536 case '^': | |
| 537 return BitXor; | |
| 538 case '|': | |
| 539 return BitOr; | |
| 540 case '*': | |
| 541 if (STR(n)[1] == '*') | |
| 542 return Pow; | |
| 543 else | |
| 544 return Mult; | |
| 545 default: | |
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546 PyErr_Format(PyExc_SystemError, "invalid augassign: %s", STR(n)); |
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547 return (operator_ty)0; |
| 35742 | 548 } |
| 549 } | |
| 550 | |
| 551 static cmpop_ty | |
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552 ast_for_comp_op(struct compiling *c, const node *n) |
| 35742 | 553 { |
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554 /* comp_op: '<'|'>'|'=='|'>='|'<='|'!='|'in'|'not' 'in'|'is' |
| 35742 | 555 |'is' 'not' |
| 556 */ | |
| 557 REQ(n, comp_op); | |
| 558 if (NCH(n) == 1) { | |
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559 n = CHILD(n, 0); |
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560 switch (TYPE(n)) { |
| 35742 | 561 case LESS: |
| 562 return Lt; | |
| 563 case GREATER: | |
| 564 return Gt; | |
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565 case EQEQUAL: /* == */ |
| 35742 | 566 return Eq; |
| 567 case LESSEQUAL: | |
| 568 return LtE; | |
| 569 case GREATEREQUAL: | |
| 570 return GtE; | |
| 571 case NOTEQUAL: | |
| 572 return NotEq; | |
| 573 case NAME: | |
| 574 if (strcmp(STR(n), "in") == 0) | |
| 575 return In; | |
| 576 if (strcmp(STR(n), "is") == 0) | |
| 577 return Is; | |
| 578 default: | |
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579 PyErr_Format(PyExc_SystemError, "invalid comp_op: %s", |
| 35742 | 580 STR(n)); |
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581 return (cmpop_ty)0; |
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582 } |
| 35742 | 583 } |
| 584 else if (NCH(n) == 2) { | |
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585 /* handle "not in" and "is not" */ |
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586 switch (TYPE(CHILD(n, 0))) { |
| 35742 | 587 case NAME: |
| 588 if (strcmp(STR(CHILD(n, 1)), "in") == 0) | |
| 589 return NotIn; | |
| 590 if (strcmp(STR(CHILD(n, 0)), "is") == 0) | |
| 591 return IsNot; | |
| 592 default: | |
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593 PyErr_Format(PyExc_SystemError, "invalid comp_op: %s %s", |
| 35742 | 594 STR(CHILD(n, 0)), STR(CHILD(n, 1))); |
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595 return (cmpop_ty)0; |
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596 } |
| 35742 | 597 } |
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598 PyErr_Format(PyExc_SystemError, "invalid comp_op: has %d children", |
| 35742 | 599 NCH(n)); |
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600 return (cmpop_ty)0; |
| 35742 | 601 } |
| 602 | |
| 603 static asdl_seq * | |
| 604 seq_for_testlist(struct compiling *c, const node *n) | |
| 605 { | |
| 606 /* testlist: test (',' test)* [','] */ | |
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607 asdl_seq *seq; |
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608 expr_ty expression; |
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609 int i; |
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610 assert(TYPE(n) == testlist || TYPE(n) == testlist_comp); |
| 35742 | 611 |
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612 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 613 if (!seq) |
| 614 return NULL; | |
| 615 | |
| 616 for (i = 0; i < NCH(n); i += 2) { | |
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617 assert(TYPE(CHILD(n, i)) == test || TYPE(CHILD(n, i)) == test_nocond); |
| 35742 | 618 |
| 619 expression = ast_for_expr(c, CHILD(n, i)); | |
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620 if (!expression) |
| 35742 | 621 return NULL; |
| 622 | |
| 623 assert(i / 2 < seq->size); | |
| 624 asdl_seq_SET(seq, i / 2, expression); | |
| 625 } | |
| 626 return seq; | |
| 627 } | |
| 628 | |
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629 static arg_ty |
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630 compiler_arg(struct compiling *c, const node *n) |
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631 { |
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632 identifier name; |
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633 expr_ty annotation = NULL; |
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634 node *ch; |
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635 |
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636 assert(TYPE(n) == tfpdef || TYPE(n) == vfpdef); |
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637 ch = CHILD(n, 0); |
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638 name = NEW_IDENTIFIER(ch); |
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639 if (!name) |
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640 return NULL; |
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641 |
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642 if (NCH(n) == 3 && TYPE(CHILD(n, 1)) == COLON) { |
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643 annotation = ast_for_expr(c, CHILD(n, 2)); |
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644 if (!annotation) |
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645 return NULL; |
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646 } |
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647 |
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648 return arg(name, annotation, c->c_arena); |
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649 #if 0 |
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650 result = Tuple(args, Store, LINENO(n), n->n_col_offset, c->c_arena); |
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651 if (!set_context(c, result, Store, n)) |
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652 return NULL; |
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653 return result; |
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654 #endif |
| 35742 | 655 } |
| 656 | |
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657 /* returns -1 if failed to handle keyword only arguments |
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658 returns new position to keep processing if successful |
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659 (',' tfpdef ['=' test])* |
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660 ^^^ |
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661 start pointing here |
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662 */ |
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663 static int |
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664 handle_keywordonly_args(struct compiling *c, const node *n, int start, |
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665 asdl_seq *kwonlyargs, asdl_seq *kwdefaults) |
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666 { |
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667 PyObject *argname; |
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668 node *ch; |
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669 expr_ty expression, annotation; |
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670 arg_ty arg; |
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671 int i = start; |
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672 int j = 0; /* index for kwdefaults and kwonlyargs */ |
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673 |
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674 if (kwonlyargs == NULL) { |
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675 ast_error(CHILD(n, start), "named arguments must follow bare *"); |
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676 return -1; |
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677 } |
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678 assert(kwdefaults != NULL); |
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679 while (i < NCH(n)) { |
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680 ch = CHILD(n, i); |
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681 switch (TYPE(ch)) { |
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682 case vfpdef: |
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683 case tfpdef: |
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684 if (i + 1 < NCH(n) && TYPE(CHILD(n, i + 1)) == EQUAL) { |
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685 expression = ast_for_expr(c, CHILD(n, i + 2)); |
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686 if (!expression) |
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687 goto error; |
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688 asdl_seq_SET(kwdefaults, j, expression); |
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689 i += 2; /* '=' and test */ |
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690 } |
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691 else { /* setting NULL if no default value exists */ |
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692 asdl_seq_SET(kwdefaults, j, NULL); |
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693 } |
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694 if (NCH(ch) == 3) { |
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695 /* ch is NAME ':' test */ |
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696 annotation = ast_for_expr(c, CHILD(ch, 2)); |
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697 if (!annotation) |
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698 goto error; |
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699 } |
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700 else { |
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701 annotation = NULL; |
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702 } |
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703 ch = CHILD(ch, 0); |
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704 argname = NEW_IDENTIFIER(ch); |
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705 if (!argname) |
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706 goto error; |
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707 arg = arg(argname, annotation, c->c_arena); |
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708 if (!arg) |
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709 goto error; |
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710 asdl_seq_SET(kwonlyargs, j++, arg); |
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711 i += 2; /* the name and the comma */ |
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712 break; |
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713 case DOUBLESTAR: |
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714 return i; |
|
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715 default: |
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716 ast_error(ch, "unexpected node"); |
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717 goto error; |
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718 } |
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719 } |
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720 return i; |
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721 error: |
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722 return -1; |
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723 } |
| 35742 | 724 |
|
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|
725 /* Create AST for argument list. */ |
| 35742 | 726 |
| 727 static arguments_ty | |
| 728 ast_for_arguments(struct compiling *c, const node *n) | |
| 729 { | |
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730 /* This function handles both typedargslist (function definition) |
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731 and varargslist (lambda definition). |
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732 |
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733 parameters: '(' [typedargslist] ')' |
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734 typedargslist: ((tfpdef ['=' test] ',')* |
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735 ('*' [tfpdef] (',' tfpdef ['=' test])* [',' '**' tfpdef] |
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736 | '**' tfpdef) |
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737 | tfpdef ['=' test] (',' tfpdef ['=' test])* [',']) |
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738 tfpdef: NAME [':' test] |
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739 varargslist: ((vfpdef ['=' test] ',')* |
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740 ('*' [vfpdef] (',' vfpdef ['=' test])* [',' '**' vfpdef] |
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741 | '**' vfpdef) |
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742 | vfpdef ['=' test] (',' vfpdef ['=' test])* [',']) |
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743 vfpdef: NAME |
| 35742 | 744 */ |
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745 int i, j, k, nposargs = 0, nkwonlyargs = 0; |
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746 int nposdefaults = 0, found_default = 0; |
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747 asdl_seq *posargs, *posdefaults, *kwonlyargs, *kwdefaults; |
| 35742 | 748 identifier vararg = NULL, kwarg = NULL; |
|
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749 arg_ty arg; |
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750 expr_ty varargannotation = NULL, kwargannotation = NULL; |
| 35742 | 751 node *ch; |
| 752 | |
| 753 if (TYPE(n) == parameters) { | |
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754 if (NCH(n) == 2) /* () as argument list */ |
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755 return arguments(NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
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756 NULL, c->c_arena); |
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757 n = CHILD(n, 1); |
| 35742 | 758 } |
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759 assert(TYPE(n) == typedargslist || TYPE(n) == varargslist); |
| 35742 | 760 |
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761 /* First count the number of positional args & defaults. The |
|
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762 variable i is the loop index for this for loop and the next. |
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763 The next loop picks up where the first leaves off. |
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764 */ |
| 35742 | 765 for (i = 0; i < NCH(n); i++) { |
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766 ch = CHILD(n, i); |
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767 if (TYPE(ch) == STAR) { |
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768 /* skip star */ |
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769 i++; |
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770 if (i < NCH(n) && /* skip argument following star */ |
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771 (TYPE(CHILD(n, i)) == tfpdef || |
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772 TYPE(CHILD(n, i)) == vfpdef)) { |
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773 i++; |
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774 } |
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775 break; |
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776 } |
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777 if (TYPE(ch) == DOUBLESTAR) break; |
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778 if (TYPE(ch) == vfpdef || TYPE(ch) == tfpdef) nposargs++; |
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779 if (TYPE(ch) == EQUAL) nposdefaults++; |
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780 } |
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781 /* count the number of keyword only args & |
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782 defaults for keyword only args */ |
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783 for ( ; i < NCH(n); ++i) { |
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784 ch = CHILD(n, i); |
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785 if (TYPE(ch) == DOUBLESTAR) break; |
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786 if (TYPE(ch) == tfpdef || TYPE(ch) == vfpdef) nkwonlyargs++; |
| 35742 | 787 } |
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788 posargs = (nposargs ? asdl_seq_new(nposargs, c->c_arena) : NULL); |
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789 if (!posargs && nposargs) |
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790 return NULL; |
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791 kwonlyargs = (nkwonlyargs ? |
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792 asdl_seq_new(nkwonlyargs, c->c_arena) : NULL); |
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793 if (!kwonlyargs && nkwonlyargs) |
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794 return NULL; |
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795 posdefaults = (nposdefaults ? |
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796 asdl_seq_new(nposdefaults, c->c_arena) : NULL); |
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797 if (!posdefaults && nposdefaults) |
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798 return NULL; |
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799 /* The length of kwonlyargs and kwdefaults are same |
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800 since we set NULL as default for keyword only argument w/o default |
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801 - we have sequence data structure, but no dictionary */ |
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802 kwdefaults = (nkwonlyargs ? |
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803 asdl_seq_new(nkwonlyargs, c->c_arena) : NULL); |
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804 if (!kwdefaults && nkwonlyargs) |
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805 return NULL; |
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806 |
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807 if (nposargs + nkwonlyargs > 255) { |
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808 ast_error(n, "more than 255 arguments"); |
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809 return NULL; |
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810 } |
| 35742 | 811 |
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812 /* tfpdef: NAME [':' test] |
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813 vfpdef: NAME |
| 35742 | 814 */ |
| 815 i = 0; | |
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816 j = 0; /* index for defaults */ |
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817 k = 0; /* index for args */ |
| 35742 | 818 while (i < NCH(n)) { |
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819 ch = CHILD(n, i); |
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820 switch (TYPE(ch)) { |
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821 case tfpdef: |
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822 case vfpdef: |
| 35742 | 823 /* XXX Need to worry about checking if TYPE(CHILD(n, i+1)) is |
| 824 anything other than EQUAL or a comma? */ | |
| 825 /* XXX Should NCH(n) check be made a separate check? */ | |
| 826 if (i + 1 < NCH(n) && TYPE(CHILD(n, i + 1)) == EQUAL) { | |
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827 expr_ty expression = ast_for_expr(c, CHILD(n, i + 2)); |
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828 if (!expression) |
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829 return NULL; |
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830 assert(posdefaults != NULL); |
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831 asdl_seq_SET(posdefaults, j++, expression); |
| 35742 | 832 i += 2; |
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833 found_default = 1; |
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834 } |
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835 else if (found_default) { |
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836 ast_error(n, |
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837 "non-default argument follows default argument"); |
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838 return NULL; |
| 35742 | 839 } |
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840 arg = compiler_arg(c, ch); |
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841 if (!arg) |
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842 return NULL; |
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843 asdl_seq_SET(posargs, k++, arg); |
| 35742 | 844 i += 2; /* the name and the comma */ |
| 845 break; | |
| 846 case STAR: | |
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847 if (i+1 >= NCH(n)) { |
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848 ast_error(CHILD(n, i), |
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849 "named arguments must follow bare *"); |
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850 return NULL; |
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851 } |
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852 ch = CHILD(n, i+1); /* tfpdef or COMMA */ |
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853 if (TYPE(ch) == COMMA) { |
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854 int res = 0; |
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855 i += 2; /* now follows keyword only arguments */ |
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856 res = handle_keywordonly_args(c, n, i, |
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857 kwonlyargs, kwdefaults); |
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858 if (res == -1) return NULL; |
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859 i = res; /* res has new position to process */ |
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860 } |
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861 else { |
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862 vararg = NEW_IDENTIFIER(CHILD(ch, 0)); |
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863 if (!vararg) |
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864 return NULL; |
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865 if (NCH(ch) > 1) { |
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866 /* there is an annotation on the vararg */ |
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867 varargannotation = ast_for_expr(c, CHILD(ch, 2)); |
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868 if (!varargannotation) |
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869 return NULL; |
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870 } |
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871 i += 3; |
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872 if (i < NCH(n) && (TYPE(CHILD(n, i)) == tfpdef |
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873 || TYPE(CHILD(n, i)) == vfpdef)) { |
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874 int res = 0; |
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875 res = handle_keywordonly_args(c, n, i, |
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876 kwonlyargs, kwdefaults); |
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877 if (res == -1) return NULL; |
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878 i = res; /* res has new position to process */ |
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879 } |
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880 } |
| 35742 | 881 break; |
| 882 case DOUBLESTAR: | |
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883 ch = CHILD(n, i+1); /* tfpdef */ |
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884 assert(TYPE(ch) == tfpdef || TYPE(ch) == vfpdef); |
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885 kwarg = NEW_IDENTIFIER(CHILD(ch, 0)); |
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886 if (!kwarg) |
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887 return NULL; |
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888 if (NCH(ch) > 1) { |
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889 /* there is an annotation on the kwarg */ |
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890 kwargannotation = ast_for_expr(c, CHILD(ch, 2)); |
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891 if (!kwargannotation) |
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892 return NULL; |
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893 } |
| 35742 | 894 i += 3; |
| 895 break; | |
| 896 default: | |
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897 PyErr_Format(PyExc_SystemError, |
| 35742 | 898 "unexpected node in varargslist: %d @ %d", |
| 899 TYPE(ch), i); | |
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900 return NULL; |
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901 } |
| 35742 | 902 } |
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903 return arguments(posargs, vararg, varargannotation, kwonlyargs, kwarg, |
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904 kwargannotation, posdefaults, kwdefaults, c->c_arena); |
| 35742 | 905 } |
| 906 | |
| 907 static expr_ty | |
| 908 ast_for_dotted_name(struct compiling *c, const node *n) | |
| 909 { | |
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910 expr_ty e; |
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911 identifier id; |
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912 int lineno, col_offset; |
| 35742 | 913 int i; |
| 914 | |
| 915 REQ(n, dotted_name); | |
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916 |
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917 lineno = LINENO(n); |
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918 col_offset = n->n_col_offset; |
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919 |
| 35742 | 920 id = NEW_IDENTIFIER(CHILD(n, 0)); |
| 921 if (!id) | |
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922 return NULL; |
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923 e = Name(id, Load, lineno, col_offset, c->c_arena); |
| 35742 | 924 if (!e) |
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925 return NULL; |
| 35742 | 926 |
| 927 for (i = 2; i < NCH(n); i+=2) { | |
| 928 id = NEW_IDENTIFIER(CHILD(n, i)); | |
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929 if (!id) |
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930 return NULL; |
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931 e = Attribute(e, id, Load, lineno, col_offset, c->c_arena); |
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932 if (!e) |
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933 return NULL; |
| 35742 | 934 } |
| 935 | |
| 936 return e; | |
| 937 } | |
| 938 | |
| 939 static expr_ty | |
| 940 ast_for_decorator(struct compiling *c, const node *n) | |
| 941 { | |
| 942 /* decorator: '@' dotted_name [ '(' [arglist] ')' ] NEWLINE */ | |
| 943 expr_ty d = NULL; | |
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944 expr_ty name_expr; |
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945 |
| 35742 | 946 REQ(n, decorator); |
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947 REQ(CHILD(n, 0), AT); |
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948 REQ(RCHILD(n, -1), NEWLINE); |
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949 |
| 35742 | 950 name_expr = ast_for_dotted_name(c, CHILD(n, 1)); |
| 951 if (!name_expr) | |
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952 return NULL; |
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953 |
| 35742 | 954 if (NCH(n) == 3) { /* No arguments */ |
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955 d = name_expr; |
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956 name_expr = NULL; |
| 35742 | 957 } |
| 958 else if (NCH(n) == 5) { /* Call with no arguments */ | |
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959 d = Call(name_expr, NULL, NULL, NULL, NULL, LINENO(n), |
|
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960 n->n_col_offset, c->c_arena); |
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961 if (!d) |
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962 return NULL; |
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963 name_expr = NULL; |
| 35742 | 964 } |
| 965 else { | |
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966 d = ast_for_call(c, CHILD(n, 3), name_expr); |
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967 if (!d) |
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968 return NULL; |
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969 name_expr = NULL; |
| 35742 | 970 } |
| 971 | |
| 972 return d; | |
| 973 } | |
| 974 | |
| 975 static asdl_seq* | |
| 976 ast_for_decorators(struct compiling *c, const node *n) | |
| 977 { | |
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978 asdl_seq* decorator_seq; |
|
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979 expr_ty d; |
| 35742 | 980 int i; |
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981 |
| 35742 | 982 REQ(n, decorators); |
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983 decorator_seq = asdl_seq_new(NCH(n), c->c_arena); |
| 35742 | 984 if (!decorator_seq) |
| 985 return NULL; | |
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986 |
| 35742 | 987 for (i = 0; i < NCH(n); i++) { |
|
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988 d = ast_for_decorator(c, CHILD(n, i)); |
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989 if (!d) |
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990 return NULL; |
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991 asdl_seq_SET(decorator_seq, i, d); |
| 35742 | 992 } |
| 993 return decorator_seq; | |
| 994 } | |
| 995 | |
| 996 static stmt_ty | |
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997 ast_for_funcdef(struct compiling *c, const node *n, asdl_seq *decorator_seq) |
| 35742 | 998 { |
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999 /* funcdef: 'def' NAME parameters ['->' test] ':' suite */ |
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1000 identifier name; |
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1001 arguments_ty args; |
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1002 asdl_seq *body; |
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1003 expr_ty returns = NULL; |
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1004 int name_i = 1; |
| 35742 | 1005 |
| 1006 REQ(n, funcdef); | |
| 1007 | |
| 1008 name = NEW_IDENTIFIER(CHILD(n, name_i)); | |
| 1009 if (!name) | |
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1010 return NULL; |
| 35742 | 1011 args = ast_for_arguments(c, CHILD(n, name_i + 1)); |
| 1012 if (!args) | |
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1013 return NULL; |
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1014 if (TYPE(CHILD(n, name_i+2)) == RARROW) { |
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1015 returns = ast_for_expr(c, CHILD(n, name_i + 3)); |
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1016 if (!returns) |
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1017 return NULL; |
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1018 name_i += 2; |
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1019 } |
| 35742 | 1020 body = ast_for_suite(c, CHILD(n, name_i + 3)); |
| 1021 if (!body) | |
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1022 return NULL; |
| 35742 | 1023 |
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1024 return FunctionDef(name, args, body, decorator_seq, returns, LINENO(n), |
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1025 n->n_col_offset, c->c_arena); |
| 35742 | 1026 } |
| 1027 | |
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1028 static stmt_ty |
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1029 ast_for_decorated(struct compiling *c, const node *n) |
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1030 { |
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1031 /* decorated: decorators (classdef | funcdef) */ |
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1032 stmt_ty thing = NULL; |
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1033 asdl_seq *decorator_seq = NULL; |
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1034 |
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1035 REQ(n, decorated); |
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1036 |
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1037 decorator_seq = ast_for_decorators(c, CHILD(n, 0)); |
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1038 if (!decorator_seq) |
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1039 return NULL; |
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1040 |
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1041 assert(TYPE(CHILD(n, 1)) == funcdef || |
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1042 TYPE(CHILD(n, 1)) == classdef); |
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1043 |
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1044 if (TYPE(CHILD(n, 1)) == funcdef) { |
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1045 thing = ast_for_funcdef(c, CHILD(n, 1), decorator_seq); |
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1046 } else if (TYPE(CHILD(n, 1)) == classdef) { |
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1047 thing = ast_for_classdef(c, CHILD(n, 1), decorator_seq); |
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1048 } |
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1049 /* we count the decorators in when talking about the class' or |
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1050 * function's line number */ |
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1051 if (thing) { |
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1052 thing->lineno = LINENO(n); |
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1053 thing->col_offset = n->n_col_offset; |
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1054 } |
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1055 return thing; |
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1056 } |
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1057 |
| 35742 | 1058 static expr_ty |
| 1059 ast_for_lambdef(struct compiling *c, const node *n) | |
| 1060 { | |
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1061 /* lambdef: 'lambda' [varargslist] ':' test |
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1062 lambdef_nocond: 'lambda' [varargslist] ':' test_nocond */ |
| 35742 | 1063 arguments_ty args; |
| 1064 expr_ty expression; | |
| 1065 | |
| 1066 if (NCH(n) == 3) { | |
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1067 args = arguments(NULL, NULL, NULL, NULL, NULL, NULL, NULL, |
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1068 NULL, c->c_arena); |
| 35742 | 1069 if (!args) |
| 1070 return NULL; | |
| 1071 expression = ast_for_expr(c, CHILD(n, 2)); | |
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1072 if (!expression) |
| 35742 | 1073 return NULL; |
| 1074 } | |
| 1075 else { | |
| 1076 args = ast_for_arguments(c, CHILD(n, 1)); | |
| 1077 if (!args) | |
| 1078 return NULL; | |
| 1079 expression = ast_for_expr(c, CHILD(n, 3)); | |
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1080 if (!expression) |
| 35742 | 1081 return NULL; |
| 1082 } | |
| 1083 | |
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1084 return Lambda(args, expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1085 } |
| 1086 | |
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1087 static expr_ty |
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1088 ast_for_ifexpr(struct compiling *c, const node *n) |
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1089 { |
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1090 /* test: or_test 'if' or_test 'else' test */ |
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1091 expr_ty expression, body, orelse; |
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1092 |
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1093 assert(NCH(n) == 5); |
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1094 body = ast_for_expr(c, CHILD(n, 0)); |
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1095 if (!body) |
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1096 return NULL; |
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1097 expression = ast_for_expr(c, CHILD(n, 2)); |
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1098 if (!expression) |
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1099 return NULL; |
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1100 orelse = ast_for_expr(c, CHILD(n, 4)); |
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1101 if (!orelse) |
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1102 return NULL; |
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1103 return IfExp(expression, body, orelse, LINENO(n), n->n_col_offset, |
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1104 c->c_arena); |
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1105 } |
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1106 |
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1107 /* |
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1108 Count the number of 'for' loops in a comprehension. |
| 35742 | 1109 |
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1110 Helper for ast_for_comprehension(). |
| 35742 | 1111 */ |
| 1112 | |
| 1113 static int | |
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1114 count_comp_fors(struct compiling *c, const node *n) |
| 35742 | 1115 { |
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1116 int n_fors = 0; |
| 35742 | 1117 |
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1118 count_comp_for: |
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1119 n_fors++; |
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1120 REQ(n, comp_for); |
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1121 if (NCH(n) == 5) |
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1122 n = CHILD(n, 4); |
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1123 else |
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1124 return n_fors; |
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1125 count_comp_iter: |
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1126 REQ(n, comp_iter); |
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1127 n = CHILD(n, 0); |
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1128 if (TYPE(n) == comp_for) |
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1129 goto count_comp_for; |
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1130 else if (TYPE(n) == comp_if) { |
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1131 if (NCH(n) == 3) { |
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1132 n = CHILD(n, 2); |
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1133 goto count_comp_iter; |
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1134 } |
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1135 else |
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1136 return n_fors; |
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1137 } |
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1138 |
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1139 /* Should never be reached */ |
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1140 PyErr_SetString(PyExc_SystemError, |
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1141 "logic error in count_comp_fors"); |
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1142 return -1; |
| 35742 | 1143 } |
| 1144 | |
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1145 /* Count the number of 'if' statements in a comprehension. |
| 35742 | 1146 |
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1147 Helper for ast_for_comprehension(). |
| 35742 | 1148 */ |
| 1149 | |
| 1150 static int | |
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1151 count_comp_ifs(struct compiling *c, const node *n) |
| 35742 | 1152 { |
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1153 int n_ifs = 0; |
| 35742 | 1154 |
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1155 while (1) { |
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1156 REQ(n, comp_iter); |
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1157 if (TYPE(CHILD(n, 0)) == comp_for) |
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1158 return n_ifs; |
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1159 n = CHILD(n, 0); |
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1160 REQ(n, comp_if); |
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1161 n_ifs++; |
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1162 if (NCH(n) == 2) |
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1163 return n_ifs; |
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1164 n = CHILD(n, 2); |
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1165 } |
| 35742 | 1166 } |
| 1167 | |
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1168 static asdl_seq * |
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1169 ast_for_comprehension(struct compiling *c, const node *n) |
| 35742 | 1170 { |
| 1171 int i, n_fors; | |
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1172 asdl_seq *comps; |
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1173 |
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1174 n_fors = count_comp_fors(c, n); |
| 35742 | 1175 if (n_fors == -1) |
| 1176 return NULL; | |
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1177 |
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1178 comps = asdl_seq_new(n_fors, c->c_arena); |
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1179 if (!comps) |
| 35742 | 1180 return NULL; |
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1181 |
| 35742 | 1182 for (i = 0; i < n_fors; i++) { |
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1183 comprehension_ty comp; |
| 35742 | 1184 asdl_seq *t; |
| 1185 expr_ty expression; | |
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1186 node *for_ch; |
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1187 |
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1188 REQ(n, comp_for); |
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1189 |
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1190 for_ch = CHILD(n, 1); |
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1191 t = ast_for_exprlist(c, for_ch, Store); |
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1192 if (!t) |
| 35742 | 1193 return NULL; |
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1194 expression = ast_for_expr(c, CHILD(n, 3)); |
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1195 if (!expression) |
| 35742 | 1196 return NULL; |
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1197 |
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1198 /* Check the # of children rather than the length of t, since |
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1199 (x for x, in ...) has 1 element in t, but still requires a Tuple. */ |
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1200 if (NCH(for_ch) == 1) |
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1201 comp = comprehension((expr_ty)asdl_seq_GET(t, 0), expression, |
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1202 NULL, c->c_arena); |
| 35742 | 1203 else |
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1204 comp = comprehension(Tuple(t, Store, LINENO(n), n->n_col_offset, |
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1205 c->c_arena), |
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1206 expression, NULL, c->c_arena); |
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1207 |
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1208 if (!comp) |
| 35742 | 1209 return NULL; |
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1210 |
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1211 if (NCH(n) == 5) { |
| 35742 | 1212 int j, n_ifs; |
| 1213 asdl_seq *ifs; | |
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1214 |
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1215 n = CHILD(n, 4); |
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1216 n_ifs = count_comp_ifs(c, n); |
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1217 if (n_ifs == -1) |
| 35742 | 1218 return NULL; |
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1219 |
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1220 ifs = asdl_seq_new(n_ifs, c->c_arena); |
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1221 if (!ifs) |
| 35742 | 1222 return NULL; |
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1223 |
| 35742 | 1224 for (j = 0; j < n_ifs; j++) { |
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1225 REQ(n, comp_iter); |
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1226 n = CHILD(n, 0); |
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1227 REQ(n, comp_if); |
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1228 |
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1229 expression = ast_for_expr(c, CHILD(n, 1)); |
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1230 if (!expression) |
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1231 return NULL; |
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1232 asdl_seq_SET(ifs, j, expression); |
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1233 if (NCH(n) == 3) |
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1234 n = CHILD(n, 2); |
| 35742 | 1235 } |
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1236 /* on exit, must guarantee that n is a comp_for */ |
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1237 if (TYPE(n) == comp_iter) |
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1238 n = CHILD(n, 0); |
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1239 comp->ifs = ifs; |
| 35742 | 1240 } |
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1241 asdl_seq_SET(comps, i, comp); |
| 35742 | 1242 } |
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1243 return comps; |
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1244 } |
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1245 |
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1246 static expr_ty |
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1247 ast_for_itercomp(struct compiling *c, const node *n, int type) |
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1248 { |
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1249 /* testlist_comp: test ( comp_for | (',' test)* [','] ) |
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1250 argument: [test '='] test [comp_for] # Really [keyword '='] test */ |
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1251 expr_ty elt; |
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1252 asdl_seq *comps; |
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1253 |
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1254 assert(NCH(n) > 1); |
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1255 |
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1256 elt = ast_for_expr(c, CHILD(n, 0)); |
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1257 if (!elt) |
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1258 return NULL; |
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1259 |
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1260 comps = ast_for_comprehension(c, CHILD(n, 1)); |
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1261 if (!comps) |
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1262 return NULL; |
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1263 |
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1264 if (type == COMP_GENEXP) |
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1265 return GeneratorExp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1266 else if (type == COMP_LISTCOMP) |
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1267 return ListComp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1268 else if (type == COMP_SETCOMP) |
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1269 return SetComp(elt, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1270 else |
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1271 /* Should never happen */ |
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1272 return NULL; |
| 35742 | 1273 } |
| 1274 | |
| 1275 static expr_ty | |
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1276 ast_for_dictcomp(struct compiling *c, const node *n) |
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1277 { |
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1278 expr_ty key, value; |
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1279 asdl_seq *comps; |
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1280 |
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1281 assert(NCH(n) > 3); |
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1282 REQ(CHILD(n, 1), COLON); |
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1283 |
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1284 key = ast_for_expr(c, CHILD(n, 0)); |
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1285 if (!key) |
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1286 return NULL; |
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1287 |
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1288 value = ast_for_expr(c, CHILD(n, 2)); |
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1289 if (!value) |
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1290 return NULL; |
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1291 |
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1292 comps = ast_for_comprehension(c, CHILD(n, 3)); |
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1293 if (!comps) |
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1294 return NULL; |
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1295 |
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1296 return DictComp(key, value, comps, LINENO(n), n->n_col_offset, c->c_arena); |
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1297 } |
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1298 |
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1299 static expr_ty |
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1300 ast_for_genexp(struct compiling *c, const node *n) |
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1301 { |
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1302 assert(TYPE(n) == (testlist_comp) || TYPE(n) == (argument)); |
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1303 return ast_for_itercomp(c, n, COMP_GENEXP); |
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1304 } |
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1305 |
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1306 static expr_ty |
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1307 ast_for_listcomp(struct compiling *c, const node *n) |
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1308 { |
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1309 assert(TYPE(n) == (testlist_comp)); |
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1310 return ast_for_itercomp(c, n, COMP_LISTCOMP); |
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1311 } |
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1312 |
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1313 static expr_ty |
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1314 ast_for_setcomp(struct compiling *c, const node *n) |
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1315 { |
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1316 assert(TYPE(n) == (dictorsetmaker)); |
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1317 return ast_for_itercomp(c, n, COMP_SETCOMP); |
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1318 } |
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1319 |
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1320 |
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1321 static expr_ty |
| 35742 | 1322 ast_for_atom(struct compiling *c, const node *n) |
| 1323 { | |
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1324 /* atom: '(' [yield_expr|testlist_comp] ')' | '[' [testlist_comp] ']' |
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1325 | '{' [dictmaker|testlist_comp] '}' | NAME | NUMBER | STRING+ |
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1326 | '...' | 'None' | 'True' | 'False' |
| 35742 | 1327 */ |
| 1328 node *ch = CHILD(n, 0); | |
| 40894 | 1329 int bytesmode = 0; |
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1330 |
| 35742 | 1331 switch (TYPE(ch)) { |
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1332 case NAME: { |
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1333 /* All names start in Load context, but may later be |
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1334 changed. */ |
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1335 PyObject *name = NEW_IDENTIFIER(ch); |
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1336 if (!name) |
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1337 return NULL; |
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1338 return Name(name, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1339 } |
| 35742 | 1340 case STRING: { |
| 40894 | 1341 PyObject *str = parsestrplus(c, n, &bytesmode); |
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1342 if (!str) { |
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1343 if (PyErr_ExceptionMatches(PyExc_UnicodeError)) { |
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1344 PyObject *type, *value, *tback, *errstr; |
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1345 PyErr_Fetch(&type, &value, &tback); |
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1346 errstr = PyObject_Str(value); |
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1347 if (errstr) { |
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1348 char *s = ""; |
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1349 char buf[128]; |
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1350 s = _PyUnicode_AsString(errstr); |
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1351 PyOS_snprintf(buf, sizeof(buf), "(unicode error) %s", s); |
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1352 ast_error(n, buf); |
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1353 Py_DECREF(errstr); |
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1354 } else { |
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1355 ast_error(n, "(unicode error) unknown error"); |
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1356 } |
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1357 Py_DECREF(type); |
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1358 Py_DECREF(value); |
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1359 Py_XDECREF(tback); |
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1360 } |
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1361 return NULL; |
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1362 } |
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1363 PyArena_AddPyObject(c->c_arena, str); |
| 40894 | 1364 if (bytesmode) |
| 1365 return Bytes(str, LINENO(n), n->n_col_offset, c->c_arena); | |
| 1366 else | |
| 1367 return Str(str, LINENO(n), n->n_col_offset, c->c_arena); | |
| 35742 | 1368 } |
| 1369 case NUMBER: { | |
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1370 PyObject *pynum = parsenumber(c, STR(ch)); |
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1371 if (!pynum) |
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1372 return NULL; |
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1373 |
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1374 PyArena_AddPyObject(c->c_arena, pynum); |
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1375 return Num(pynum, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1376 } |
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Georg Brandl <georg@python.org>
parents:
41226
diff
changeset
|
1377 case ELLIPSIS: /* Ellipsis */ |
|
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Neal Norwitz <nnorwitz@gmail.com>
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|
1378 return Ellipsis(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1379 case LPAR: /* some parenthesized expressions */ |
|
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|
1380 ch = CHILD(n, 1); |
|
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|
1381 |
|
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|
1382 if (TYPE(ch) == RPAR) |
|
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1383 return Tuple(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1384 |
|
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|
1385 if (TYPE(ch) == yield_expr) |
|
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|
1386 return ast_for_expr(c, ch); |
|
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|
1387 |
|
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|
1388 /* testlist_comp: test ( comp_for | (',' test)* [','] ) */ |
|
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|
1389 if ((NCH(ch) > 1) && (TYPE(CHILD(ch, 1)) == comp_for)) |
|
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1390 return ast_for_genexp(c, ch); |
|
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|
1391 |
|
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|
1392 return ast_for_testlist(c, ch); |
| 35742 | 1393 case LSQB: /* list (or list comprehension) */ |
|
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1394 ch = CHILD(n, 1); |
|
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|
1395 |
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1396 if (TYPE(ch) == RSQB) |
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1397 return List(NULL, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1398 |
|
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|
1399 REQ(ch, testlist_comp); |
|
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1400 if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) { |
|
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1401 asdl_seq *elts = seq_for_testlist(c, ch); |
|
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1402 if (!elts) |
|
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|
1403 return NULL; |
|
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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|
1404 |
|
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1405 return List(elts, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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1406 } |
|
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|
1407 else |
|
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1408 return ast_for_listcomp(c, ch); |
| 35742 | 1409 case LBRACE: { |
|
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|
1410 /* dictorsetmaker: test ':' test (',' test ':' test)* [','] | |
|
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|
1411 * test (gen_for | (',' test)* [',']) */ |
|
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|
1412 int i, size; |
|
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|
1413 asdl_seq *keys, *values; |
|
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|
1414 |
|
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|
1415 ch = CHILD(n, 1); |
|
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|
1416 if (TYPE(ch) == RBRACE) { |
|
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|
1417 /* it's an empty dict */ |
|
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|
1418 return Dict(NULL, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1419 } else if (NCH(ch) == 1 || TYPE(CHILD(ch, 1)) == COMMA) { |
|
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diff
changeset
|
1420 /* it's a simple set */ |
|
41482
a5e410639e24
Make it compile with C89.
Guido van Rossum <guido@python.org>
parents:
41464
diff
changeset
|
1421 asdl_seq *elts; |
|
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SF patch 1547796 by Georg Brandl -- set literals.
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|
1422 size = (NCH(ch) + 1) / 2; /* +1 in case no trailing comma */ |
|
41482
a5e410639e24
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Guido van Rossum <guido@python.org>
parents:
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diff
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|
1423 elts = asdl_seq_new(size, c->c_arena); |
|
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|
1424 if (!elts) |
|
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|
1425 return NULL; |
|
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diff
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|
1426 for (i = 0; i < NCH(ch); i += 2) { |
|
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|
1427 expr_ty expression; |
|
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|
1428 expression = ast_for_expr(c, CHILD(ch, i)); |
|
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|
1429 if (!expression) |
|
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|
1430 return NULL; |
|
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|
1431 asdl_seq_SET(elts, i / 2, expression); |
|
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|
1432 } |
|
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|
1433 return Set(elts, LINENO(n), n->n_col_offset, c->c_arena); |
|
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diff
changeset
|
1434 } else if (TYPE(CHILD(ch, 1)) == comp_for) { |
|
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changeset
|
1435 /* it's a set comprehension */ |
|
060c79f6d919
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|
1436 return ast_for_setcomp(c, ch); |
|
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|
1437 } else if (NCH(ch) > 3 && TYPE(CHILD(ch, 3)) == comp_for) { |
|
090588a17490
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|
1438 return ast_for_dictcomp(c, ch); |
|
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diff
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|
1439 } else { |
|
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diff
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|
1440 /* it's a dict */ |
|
d0b83c4630c0
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|
1441 size = (NCH(ch) + 1) / 4; /* +1 in case no trailing comma */ |
|
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diff
changeset
|
1442 keys = asdl_seq_new(size, c->c_arena); |
|
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|
1443 if (!keys) |
|
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|
1444 return NULL; |
|
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|
1445 |
|
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|
1446 values = asdl_seq_new(size, c->c_arena); |
|
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changeset
|
1447 if (!values) |
|
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|
1448 return NULL; |
|
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|
1449 |
|
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|
1450 for (i = 0; i < NCH(ch); i += 4) { |
|
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changeset
|
1451 expr_ty expression; |
|
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|
1452 |
|
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|
1453 expression = ast_for_expr(c, CHILD(ch, i)); |
|
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changeset
|
1454 if (!expression) |
|
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|
1455 return NULL; |
|
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Neal Norwitz <nnorwitz@gmail.com>
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changeset
|
1456 |
|
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changeset
|
1457 asdl_seq_SET(keys, i / 4, expression); |
|
35873
76ed7fdc9d85
Fix a whole bunch of potential memory leaks (and some real ones too)
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parents:
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diff
changeset
|
1458 |
|
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changeset
|
1459 expression = ast_for_expr(c, CHILD(ch, i + 2)); |
|
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changeset
|
1460 if (!expression) |
|
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changeset
|
1461 return NULL; |
|
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|
1462 |
|
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changeset
|
1463 asdl_seq_SET(values, i / 4, expression); |
|
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|
1464 } |
|
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diff
changeset
|
1465 return Dict(keys, values, LINENO(n), n->n_col_offset, c->c_arena); |
|
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|
1466 } |
| 35742 | 1467 } |
| 1468 default: | |
|
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|
1469 PyErr_Format(PyExc_SystemError, "unhandled atom %d", TYPE(ch)); |
|
cc992d75d5b3
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|
1470 return NULL; |
| 35742 | 1471 } |
| 1472 } | |
| 1473 | |
| 1474 static slice_ty | |
| 1475 ast_for_slice(struct compiling *c, const node *n) | |
| 1476 { | |
| 1477 node *ch; | |
| 1478 expr_ty lower = NULL, upper = NULL, step = NULL; | |
| 1479 | |
| 1480 REQ(n, subscript); | |
| 1481 | |
| 1482 /* | |
|
39783
7a0ad110e91e
Patch #1550786: ellipsis literal.
Georg Brandl <georg@python.org>
parents:
39782
diff
changeset
|
1483 subscript: test | [test] ':' [test] [sliceop] |
| 35742 | 1484 sliceop: ':' [test] |
| 1485 */ | |
| 1486 ch = CHILD(n, 0); | |
| 1487 if (NCH(n) == 1 && TYPE(ch) == test) { | |
| 1488 /* 'step' variable hold no significance in terms of being used over | |
| 1489 other vars */ | |
|
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|
1490 step = ast_for_expr(c, ch); |
| 35742 | 1491 if (!step) |
| 1492 return NULL; | |
|
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|
1493 |
|
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|
1494 return Index(step, c->c_arena); |
| 35742 | 1495 } |
| 1496 | |
| 1497 if (TYPE(ch) == test) { | |
|
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|
1498 lower = ast_for_expr(c, ch); |
| 35742 | 1499 if (!lower) |
| 1500 return NULL; | |
| 1501 } | |
| 1502 | |
| 1503 /* If there's an upper bound it's in the second or third position. */ | |
| 1504 if (TYPE(ch) == COLON) { | |
|
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|
1505 if (NCH(n) > 1) { |
|
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changeset
|
1506 node *n2 = CHILD(n, 1); |
| 35742 | 1507 |
|
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|
1508 if (TYPE(n2) == test) { |
|
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changeset
|
1509 upper = ast_for_expr(c, n2); |
| 35742 | 1510 if (!upper) |
| 1511 return NULL; | |
| 1512 } | |
|
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diff
changeset
|
1513 } |
| 35742 | 1514 } else if (NCH(n) > 2) { |
|
40450
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Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
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changeset
|
1515 node *n2 = CHILD(n, 2); |
| 35742 | 1516 |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
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40215
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changeset
|
1517 if (TYPE(n2) == test) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
1518 upper = ast_for_expr(c, n2); |
| 35742 | 1519 if (!upper) |
| 1520 return NULL; | |
| 1521 } | |
| 1522 } | |
| 1523 | |
| 1524 ch = CHILD(n, NCH(n) - 1); | |
| 1525 if (TYPE(ch) == sliceop) { | |
|
37879
f731859e9b3b
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Thomas Wouters <thomas@python.org>
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changeset
|
1526 if (NCH(ch) == 1) { |
|
f731859e9b3b
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diff
changeset
|
1527 /* No expression, so step is None */ |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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changeset
|
1528 ch = CHILD(ch, 0); |
|
f731859e9b3b
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changeset
|
1529 step = Name(new_identifier("None", c->c_arena), Load, |
|
f731859e9b3b
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diff
changeset
|
1530 LINENO(ch), ch->n_col_offset, c->c_arena); |
| 35742 | 1531 if (!step) |
| 1532 return NULL; | |
|
37879
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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diff
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|
1533 } else { |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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diff
changeset
|
1534 ch = CHILD(ch, 1); |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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changeset
|
1535 if (TYPE(ch) == test) { |
|
f731859e9b3b
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Thomas Wouters <thomas@python.org>
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changeset
|
1536 step = ast_for_expr(c, ch); |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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|
1537 if (!step) |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
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diff
changeset
|
1538 return NULL; |
|
f731859e9b3b
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diff
changeset
|
1539 } |
| 35742 | 1540 } |
| 1541 } | |
| 1542 | |
|
36065
ea083efdc96c
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
|
1543 return Slice(lower, upper, step, c->c_arena); |
| 35742 | 1544 } |
| 1545 | |
| 1546 static expr_ty | |
| 1547 ast_for_binop(struct compiling *c, const node *n) | |
| 1548 { | |
|
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|
1549 /* Must account for a sequence of expressions. |
|
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|
1550 How should A op B op C by represented? |
|
41554
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|
1551 BinOp(BinOp(A, op, B), op, C). |
|
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|
1552 */ |
| 35742 | 1553 |
|
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|
1554 int i, nops; |
|
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|
1555 expr_ty expr1, expr2, result; |
|
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|
1556 operator_ty newoperator; |
|
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|
1557 |
|
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|
1558 expr1 = ast_for_expr(c, CHILD(n, 0)); |
|
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|
1559 if (!expr1) |
|
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|
1560 return NULL; |
| 35742 | 1561 |
|
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|
1562 expr2 = ast_for_expr(c, CHILD(n, 2)); |
|
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|
1563 if (!expr2) |
|
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|
1564 return NULL; |
|
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|
1565 |
|
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|
1566 newoperator = get_operator(CHILD(n, 1)); |
|
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|
1567 if (!newoperator) |
|
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|
1568 return NULL; |
| 35742 | 1569 |
|
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|
1570 result = BinOp(expr1, newoperator, expr2, LINENO(n), n->n_col_offset, |
|
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|
1571 c->c_arena); |
|
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|
1572 if (!result) |
|
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|
1573 return NULL; |
| 35742 | 1574 |
|
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|
1575 nops = (NCH(n) - 1) / 2; |
|
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|
1576 for (i = 1; i < nops; i++) { |
|
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|
1577 expr_ty tmp_result, tmp; |
|
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|
1578 const node* next_oper = CHILD(n, i * 2 + 1); |
|
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|
1579 |
|
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|
1580 newoperator = get_operator(next_oper); |
|
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|
1581 if (!newoperator) |
| 35742 | 1582 return NULL; |
| 1583 | |
|
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|
1584 tmp = ast_for_expr(c, CHILD(n, i * 2 + 2)); |
|
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|
1585 if (!tmp) |
| 35742 | 1586 return NULL; |
| 1587 | |
|
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|
1588 tmp_result = BinOp(result, newoperator, tmp, |
|
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1589 LINENO(next_oper), next_oper->n_col_offset, |
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1590 c->c_arena); |
|
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|
1591 if (!tmp_result) |
|
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1592 return NULL; |
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|
1593 result = tmp_result; |
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1594 } |
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|
1595 return result; |
| 35742 | 1596 } |
| 1597 | |
|
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|
1598 static expr_ty |
|
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|
1599 ast_for_trailer(struct compiling *c, const node *n, expr_ty left_expr) |
|
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|
1600 { |
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1601 /* trailer: '(' [arglist] ')' | '[' subscriptlist ']' | '.' NAME |
|
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|
1602 subscriptlist: subscript (',' subscript)* [','] |
|
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|
1603 subscript: '.' '.' '.' | test | [test] ':' [test] [sliceop] |
|
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1604 */ |
|
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|
1605 REQ(n, trailer); |
|
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|
1606 if (TYPE(CHILD(n, 0)) == LPAR) { |
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|
1607 if (NCH(n) == 2) |
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1608 return Call(left_expr, NULL, NULL, NULL, NULL, LINENO(n), |
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1609 n->n_col_offset, c->c_arena); |
|
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1610 else |
|
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1611 return ast_for_call(c, CHILD(n, 1), left_expr); |
|
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1612 } |
|
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1613 else if (TYPE(CHILD(n, 0)) == DOT ) { |
|
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1614 PyObject *attr_id = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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1615 if (!attr_id) |
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1616 return NULL; |
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1617 return Attribute(left_expr, attr_id, Load, |
|
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|
1618 LINENO(n), n->n_col_offset, c->c_arena); |
|
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1619 } |
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1620 else { |
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1621 REQ(CHILD(n, 0), LSQB); |
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|
1622 REQ(CHILD(n, 2), RSQB); |
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1623 n = CHILD(n, 1); |
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1624 if (NCH(n) == 1) { |
|
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|
1625 slice_ty slc = ast_for_slice(c, CHILD(n, 0)); |
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1626 if (!slc) |
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1627 return NULL; |
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|
1628 return Subscript(left_expr, slc, Load, LINENO(n), n->n_col_offset, |
|
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|
1629 c->c_arena); |
|
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1630 } |
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|
1631 else { |
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|
1632 /* The grammar is ambiguous here. The ambiguity is resolved |
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|
1633 by treating the sequence as a tuple literal if there are |
|
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|
1634 no slice features. |
|
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|
1635 */ |
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|
1636 int j; |
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|
1637 slice_ty slc; |
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|
1638 expr_ty e; |
|
40941
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changeset
|
1639 int simple = 1; |
|
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changeset
|
1640 asdl_seq *slices, *elts; |
|
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|
1641 slices = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
|
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|
1642 if (!slices) |
|
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
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diff
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|
1643 return NULL; |
|
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Refactor code for translating "power" nodes.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
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diff
changeset
|
1644 for (j = 0; j < NCH(n); j += 2) { |
|
842caa245917
Refactor code for translating "power" nodes.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
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diff
changeset
|
1645 slc = ast_for_slice(c, CHILD(n, j)); |
|
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
|
1646 if (!slc) |
|
35799
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parents:
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diff
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|
1647 return NULL; |
|
36686
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
changeset
|
1648 if (slc->kind != Index_kind) |
|
40941
2ca14d6a369b
Whoops, fix build breakage. There were still a few uses of the bool type.
Neal Norwitz <nnorwitz@gmail.com>
parents:
40894
diff
changeset
|
1649 simple = 0; |
|
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Refactor code for translating "power" nodes.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
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diff
changeset
|
1650 asdl_seq_SET(slices, j / 2, slc); |
|
842caa245917
Refactor code for translating "power" nodes.
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
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diff
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|
1651 } |
|
36686
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Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
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|
1652 if (!simple) { |
|
8611f39cd82b
Fix parsing of subscriptlist.
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parents:
36682
diff
changeset
|
1653 return Subscript(left_expr, ExtSlice(slices, c->c_arena), |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
1654 Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
36686
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
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|
1655 } |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
changeset
|
1656 /* extract Index values and put them in a Tuple */ |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
changeset
|
1657 elts = asdl_seq_new(asdl_seq_LEN(slices), c->c_arena); |
|
36877
e9a7a2784e17
SF #1444030: Fix several potential defects found by Coverity.
Hye-Shik Chang <hyeshik@gmail.com>
parents:
36786
diff
changeset
|
1658 if (!elts) |
|
e9a7a2784e17
SF #1444030: Fix several potential defects found by Coverity.
Hye-Shik Chang <hyeshik@gmail.com>
parents:
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diff
changeset
|
1659 return NULL; |
|
36686
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
changeset
|
1660 for (j = 0; j < asdl_seq_LEN(slices); ++j) { |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
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|
1661 slc = (slice_ty)asdl_seq_GET(slices, j); |
|
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Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
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|
1662 assert(slc->kind == Index_kind && slc->v.Index.value); |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
changeset
|
1663 asdl_seq_SET(elts, j, slc->v.Index.value); |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
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|
1664 } |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
1665 e = Tuple(elts, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
36686
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diff
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|
1666 if (!e) |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
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|
1667 return NULL; |
|
8611f39cd82b
Fix parsing of subscriptlist.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36682
diff
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|
1668 return Subscript(left_expr, Index(e, c->c_arena), |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
1669 Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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842caa245917
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Neil Schemenauer <nascheme@enme.ucalgary.ca>
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diff
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|
1670 } |
|
842caa245917
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diff
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|
1671 } |
|
842caa245917
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diff
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|
1672 } |
|
842caa245917
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|
1673 |
|
842caa245917
Refactor code for translating "power" nodes.
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|
1674 static expr_ty |
|
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|
1675 ast_for_factor(struct compiling *c, const node *n) |
|
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|
1676 { |
|
62647
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1677 node *pfactor, *ppower, *patom, *pnum; |
|
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|
1678 expr_ty expression; |
|
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|
1679 |
|
62647
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
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diff
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|
1680 /* If the unary - operator is applied to a constant, don't generate |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1681 a UNARY_NEGATIVE opcode. Just store the approriate value as a |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1682 constant. The peephole optimizer already does something like |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1683 this but it doesn't handle the case where the constant is |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1684 (sys.maxint - 1). In that case, we want a PyIntObject, not a |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1685 PyLongObject. |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1686 */ |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
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|
1687 if (TYPE(CHILD(n, 0)) == MINUS |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
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diff
changeset
|
1688 && NCH(n) == 2 |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1689 && TYPE((pfactor = CHILD(n, 1))) == factor |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1690 && NCH(pfactor) == 1 |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
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|
1691 && TYPE((ppower = CHILD(pfactor, 0))) == power |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
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|
1692 && NCH(ppower) == 1 |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
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|
1693 && TYPE((patom = CHILD(ppower, 0))) == atom |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1694 && TYPE((pnum = CHILD(patom, 0))) == NUMBER) { |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
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changeset
|
1695 char *s = PyObject_MALLOC(strlen(STR(pnum)) + 2); |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
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|
1696 if (s == NULL) |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
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diff
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|
1697 return NULL; |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1698 s[0] = '-'; |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1699 strcpy(s + 1, STR(pnum)); |
|
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Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1700 PyObject_FREE(STR(pnum)); |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1701 STR(pnum) = s; |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1702 return ast_for_atom(c, patom); |
|
d34ce0de941c
Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1703 } |
|
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Revert r82044, since it changed the semantics of negated imaginary literals.
Mark Dickinson <dickinsm@gmail.com>
parents:
62374
diff
changeset
|
1704 |
|
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|
1705 expression = ast_for_expr(c, CHILD(n, 1)); |
|
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|
1706 if (!expression) |
|
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|
1707 return NULL; |
|
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|
1708 |
|
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|
1709 switch (TYPE(CHILD(n, 0))) { |
|
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|
1710 case PLUS: |
|
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|
1711 return UnaryOp(UAdd, expression, LINENO(n), n->n_col_offset, |
|
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|
1712 c->c_arena); |
|
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|
1713 case MINUS: |
|
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|
1714 return UnaryOp(USub, expression, LINENO(n), n->n_col_offset, |
|
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|
1715 c->c_arena); |
|
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|
1716 case TILDE: |
|
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|
1717 return UnaryOp(Invert, expression, LINENO(n), |
|
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|
1718 n->n_col_offset, c->c_arena); |
|
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|
1719 } |
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|
1720 PyErr_Format(PyExc_SystemError, "unhandled factor: %d", |
|
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|
1721 TYPE(CHILD(n, 0))); |
|
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|
1722 return NULL; |
|
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|
1723 } |
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|
1724 |
|
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|
1725 static expr_ty |
|
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|
1726 ast_for_power(struct compiling *c, const node *n) |
|
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1727 { |
|
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|
1728 /* power: atom trailer* ('**' factor)* |
|
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|
1729 */ |
|
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|
1730 int i; |
|
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|
1731 expr_ty e, tmp; |
|
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|
1732 REQ(n, power); |
|
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|
1733 e = ast_for_atom(c, CHILD(n, 0)); |
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|
1734 if (!e) |
|
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|
1735 return NULL; |
|
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|
1736 if (NCH(n) == 1) |
|
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|
1737 return e; |
|
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|
1738 for (i = 1; i < NCH(n); i++) { |
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|
1739 node *ch = CHILD(n, i); |
|
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|
1740 if (TYPE(ch) != trailer) |
|
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|
1741 break; |
|
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|
1742 tmp = ast_for_trailer(c, ch, e); |
|
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|
1743 if (!tmp) |
|
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|
1744 return NULL; |
|
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|
1745 tmp->lineno = e->lineno; |
|
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|
1746 tmp->col_offset = e->col_offset; |
|
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|
1747 e = tmp; |
|
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|
1748 } |
|
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|
1749 if (TYPE(CHILD(n, NCH(n) - 1)) == factor) { |
|
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|
1750 expr_ty f = ast_for_expr(c, CHILD(n, NCH(n) - 1)); |
|
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|
1751 if (!f) |
|
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1752 return NULL; |
|
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1753 tmp = BinOp(e, Pow, f, LINENO(n), n->n_col_offset, c->c_arena); |
|
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1754 if (!tmp) |
|
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|
1755 return NULL; |
|
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|
1756 e = tmp; |
|
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1757 } |
|
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|
1758 return e; |
|
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|
1759 } |
|
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|
1760 |
|
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1761 static expr_ty |
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1762 ast_for_starred(struct compiling *c, const node *n) |
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1763 { |
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1764 expr_ty tmp; |
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1765 REQ(n, star_expr); |
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1766 |
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1767 tmp = ast_for_expr(c, CHILD(n, 1)); |
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1768 if (!tmp) |
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1769 return NULL; |
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1770 |
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1771 /* The Load context is changed later. */ |
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1772 return Starred(tmp, Load, LINENO(n), n->n_col_offset, c->c_arena); |
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1773 } |
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1774 |
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1775 |
| 35742 | 1776 /* Do not name a variable 'expr'! Will cause a compile error. |
| 1777 */ | |
| 1778 | |
| 1779 static expr_ty | |
| 1780 ast_for_expr(struct compiling *c, const node *n) | |
| 1781 { | |
| 1782 /* handle the full range of simple expressions | |
|
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1783 test: or_test ['if' or_test 'else' test] | lambdef |
|
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1784 test_nocond: or_test | lambdef_nocond |
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1785 or_test: and_test ('or' and_test)* |
| 35742 | 1786 and_test: not_test ('and' not_test)* |
| 1787 not_test: 'not' not_test | comparison | |
| 1788 comparison: expr (comp_op expr)* | |
| 1789 expr: xor_expr ('|' xor_expr)* | |
| 1790 xor_expr: and_expr ('^' and_expr)* | |
| 1791 and_expr: shift_expr ('&' shift_expr)* | |
| 1792 shift_expr: arith_expr (('<<'|'>>') arith_expr)* | |
| 1793 arith_expr: term (('+'|'-') term)* | |
| 1794 term: factor (('*'|'/'|'%'|'//') factor)* | |
| 1795 factor: ('+'|'-'|'~') factor | power | |
| 1796 power: atom trailer* ('**' factor)* | |
| 1797 */ | |
| 1798 | |
| 1799 asdl_seq *seq; | |
| 1800 int i; | |
| 1801 | |
| 1802 loop: | |
| 1803 switch (TYPE(n)) { | |
| 1804 case test: | |
|
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1805 case test_nocond: |
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1806 if (TYPE(CHILD(n, 0)) == lambdef || |
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1807 TYPE(CHILD(n, 0)) == lambdef_nocond) |
| 35742 | 1808 return ast_for_lambdef(c, CHILD(n, 0)); |
|
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1809 else if (NCH(n) > 1) |
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1810 return ast_for_ifexpr(c, n); |
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1811 /* Fallthrough */ |
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1812 case or_test: |
| 35742 | 1813 case and_test: |
| 1814 if (NCH(n) == 1) { | |
| 1815 n = CHILD(n, 0); | |
| 1816 goto loop; | |
| 1817 } | |
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1818 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 1819 if (!seq) |
| 1820 return NULL; | |
| 1821 for (i = 0; i < NCH(n); i += 2) { | |
| 1822 expr_ty e = ast_for_expr(c, CHILD(n, i)); | |
| 1823 if (!e) | |
| 1824 return NULL; | |
| 1825 asdl_seq_SET(seq, i / 2, e); | |
| 1826 } | |
| 1827 if (!strcmp(STR(CHILD(n, 1)), "and")) | |
|
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1828 return BoolOp(And, seq, LINENO(n), n->n_col_offset, |
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1829 c->c_arena); |
|
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1830 assert(!strcmp(STR(CHILD(n, 1)), "or")); |
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1831 return BoolOp(Or, seq, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 1832 case not_test: |
| 1833 if (NCH(n) == 1) { | |
| 1834 n = CHILD(n, 0); | |
| 1835 goto loop; | |
| 1836 } | |
| 1837 else { | |
| 1838 expr_ty expression = ast_for_expr(c, CHILD(n, 1)); | |
| 1839 if (!expression) | |
| 1840 return NULL; | |
| 1841 | |
|
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1842 return UnaryOp(Not, expression, LINENO(n), n->n_col_offset, |
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1843 c->c_arena); |
| 35742 | 1844 } |
| 1845 case comparison: | |
| 1846 if (NCH(n) == 1) { | |
| 1847 n = CHILD(n, 0); | |
| 1848 goto loop; | |
| 1849 } | |
| 1850 else { | |
| 1851 expr_ty expression; | |
|
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1852 asdl_int_seq *ops; |
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1853 asdl_seq *cmps; |
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1854 ops = asdl_int_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 1855 if (!ops) |
| 1856 return NULL; | |
|
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1857 cmps = asdl_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 1858 if (!cmps) { |
| 1859 return NULL; | |
| 1860 } | |
| 1861 for (i = 1; i < NCH(n); i += 2) { | |
|
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1862 cmpop_ty newoperator; |
| 35742 | 1863 |
|
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1864 newoperator = ast_for_comp_op(c, CHILD(n, i)); |
|
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1865 if (!newoperator) { |
| 35742 | 1866 return NULL; |
|
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1867 } |
| 35742 | 1868 |
| 1869 expression = ast_for_expr(c, CHILD(n, i + 1)); | |
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1870 if (!expression) { |
| 35742 | 1871 return NULL; |
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1872 } |
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1873 |
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1874 asdl_seq_SET(ops, i / 2, newoperator); |
| 35742 | 1875 asdl_seq_SET(cmps, i / 2, expression); |
| 1876 } | |
| 1877 expression = ast_for_expr(c, CHILD(n, 0)); | |
|
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1878 if (!expression) { |
| 35742 | 1879 return NULL; |
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1880 } |
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1881 |
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1882 return Compare(expression, ops, cmps, LINENO(n), |
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1883 n->n_col_offset, c->c_arena); |
| 35742 | 1884 } |
| 1885 break; | |
| 1886 | |
|
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1887 case star_expr: |
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1888 if (TYPE(CHILD(n, 0)) == STAR) { |
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1889 return ast_for_starred(c, n); |
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1890 } |
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1891 /* Fallthrough */ |
| 35742 | 1892 /* The next five cases all handle BinOps. The main body of code |
| 1893 is the same in each case, but the switch turned inside out to | |
| 1894 reuse the code for each type of operator. | |
| 1895 */ | |
| 1896 case expr: | |
| 1897 case xor_expr: | |
| 1898 case and_expr: | |
| 1899 case shift_expr: | |
| 1900 case arith_expr: | |
| 1901 case term: | |
| 1902 if (NCH(n) == 1) { | |
| 1903 n = CHILD(n, 0); | |
| 1904 goto loop; | |
| 1905 } | |
| 1906 return ast_for_binop(c, n); | |
| 1907 case yield_expr: { | |
|
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1908 expr_ty exp = NULL; |
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1909 if (NCH(n) == 2) { |
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1910 exp = ast_for_testlist(c, CHILD(n, 1)); |
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1911 if (!exp) |
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1912 return NULL; |
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1913 } |
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1914 return Yield(exp, LINENO(n), n->n_col_offset, c->c_arena); |
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1915 } |
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1916 case factor: |
| 35742 | 1917 if (NCH(n) == 1) { |
| 1918 n = CHILD(n, 0); | |
| 1919 goto loop; | |
| 1920 } | |
|
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1921 return ast_for_factor(c, n); |
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1922 case power: |
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1923 return ast_for_power(c, n); |
| 35742 | 1924 default: |
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1925 PyErr_Format(PyExc_SystemError, "unhandled expr: %d", TYPE(n)); |
| 35742 | 1926 return NULL; |
| 1927 } | |
|
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1928 /* should never get here unless if error is set */ |
| 35742 | 1929 return NULL; |
| 1930 } | |
| 1931 | |
| 1932 static expr_ty | |
| 1933 ast_for_call(struct compiling *c, const node *n, expr_ty func) | |
| 1934 { | |
| 1935 /* | |
| 1936 arglist: (argument ',')* (argument [',']| '*' test [',' '**' test] | |
| 1937 | '**' test) | |
|
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1938 argument: [test '='] test [comp_for] # Really [keyword '='] test |
| 35742 | 1939 */ |
| 1940 | |
| 1941 int i, nargs, nkeywords, ngens; | |
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1942 asdl_seq *args; |
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1943 asdl_seq *keywords; |
| 35742 | 1944 expr_ty vararg = NULL, kwarg = NULL; |
| 1945 | |
| 1946 REQ(n, arglist); | |
| 1947 | |
| 1948 nargs = 0; | |
| 1949 nkeywords = 0; | |
| 1950 ngens = 0; | |
| 1951 for (i = 0; i < NCH(n); i++) { | |
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1952 node *ch = CHILD(n, i); |
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1953 if (TYPE(ch) == argument) { |
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1954 if (NCH(ch) == 1) |
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1955 nargs++; |
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1956 else if (TYPE(CHILD(ch, 1)) == comp_for) |
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1957 ngens++; |
| 35742 | 1958 else |
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1959 nkeywords++; |
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1960 } |
| 35742 | 1961 } |
| 1962 if (ngens > 1 || (ngens && (nargs || nkeywords))) { | |
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1963 ast_error(n, "Generator expression must be parenthesized " |
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1964 "if not sole argument"); |
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1965 return NULL; |
| 35742 | 1966 } |
| 1967 | |
| 1968 if (nargs + nkeywords + ngens > 255) { | |
| 1969 ast_error(n, "more than 255 arguments"); | |
| 1970 return NULL; | |
| 1971 } | |
| 1972 | |
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1973 args = asdl_seq_new(nargs + ngens, c->c_arena); |
| 35742 | 1974 if (!args) |
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1975 return NULL; |
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1976 keywords = asdl_seq_new(nkeywords, c->c_arena); |
| 35742 | 1977 if (!keywords) |
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1978 return NULL; |
| 35742 | 1979 nargs = 0; |
| 1980 nkeywords = 0; | |
| 1981 for (i = 0; i < NCH(n); i++) { | |
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1982 node *ch = CHILD(n, i); |
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1983 if (TYPE(ch) == argument) { |
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1984 expr_ty e; |
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1985 if (NCH(ch) == 1) { |
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1986 if (nkeywords) { |
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1987 ast_error(CHILD(ch, 0), |
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1988 "non-keyword arg after keyword arg"); |
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1989 return NULL; |
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1990 } |
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1991 if (vararg) { |
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1992 ast_error(CHILD(ch, 0), |
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1993 "only named arguments may follow *expression"); |
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1994 return NULL; |
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1995 } |
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1996 e = ast_for_expr(c, CHILD(ch, 0)); |
| 35742 | 1997 if (!e) |
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1998 return NULL; |
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1999 asdl_seq_SET(args, nargs++, e); |
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2000 } |
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2001 else if (TYPE(CHILD(ch, 1)) == comp_for) { |
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2002 e = ast_for_genexp(c, ch); |
| 35742 | 2003 if (!e) |
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2004 return NULL; |
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2005 asdl_seq_SET(args, nargs++, e); |
| 35742 | 2006 } |
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2007 else { |
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2008 keyword_ty kw; |
|
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2009 identifier key, tmp; |
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2010 int k; |
| 35742 | 2011 |
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2012 /* CHILD(ch, 0) is test, but must be an identifier? */ |
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2013 e = ast_for_expr(c, CHILD(ch, 0)); |
| 35742 | 2014 if (!e) |
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2015 return NULL; |
| 35742 | 2016 /* f(lambda x: x[0] = 3) ends up getting parsed with |
| 2017 * LHS test = lambda x: x[0], and RHS test = 3. | |
| 2018 * SF bug 132313 points out that complaining about a keyword | |
| 2019 * then is very confusing. | |
| 2020 */ | |
| 2021 if (e->kind == Lambda_kind) { | |
| 2022 ast_error(CHILD(ch, 0), "lambda cannot contain assignment"); | |
|
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2023 return NULL; |
| 35742 | 2024 } else if (e->kind != Name_kind) { |
| 2025 ast_error(CHILD(ch, 0), "keyword can't be an expression"); | |
|
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2026 return NULL; |
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2027 } else if (forbidden_name(e, ch)) { |
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2028 return NULL; |
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2029 } |
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2030 key = e->v.Name.id; |
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2031 for (k = 0; k < nkeywords; k++) { |
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2032 tmp = ((keyword_ty)asdl_seq_GET(keywords, k))->arg; |
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2033 if (!PyUnicode_Compare(tmp, key)) { |
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2034 ast_error(CHILD(ch, 0), "keyword argument repeated"); |
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2035 return NULL; |
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2036 } |
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2037 } |
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2038 e = ast_for_expr(c, CHILD(ch, 2)); |
| 35742 | 2039 if (!e) |
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2040 return NULL; |
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2041 kw = keyword(key, e, c->c_arena); |
| 35742 | 2042 if (!kw) |
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2043 return NULL; |
|
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2044 asdl_seq_SET(keywords, nkeywords++, kw); |
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2045 } |
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2046 } |
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2047 else if (TYPE(ch) == STAR) { |
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2048 vararg = ast_for_expr(c, CHILD(n, i+1)); |
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2049 if (!vararg) |
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2050 return NULL; |
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2051 i++; |
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2052 } |
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2053 else if (TYPE(ch) == DOUBLESTAR) { |
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2054 kwarg = ast_for_expr(c, CHILD(n, i+1)); |
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2055 if (!kwarg) |
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2056 return NULL; |
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2057 i++; |
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2058 } |
| 35742 | 2059 } |
| 2060 | |
|
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2061 return Call(func, args, keywords, vararg, kwarg, func->lineno, func->col_offset, c->c_arena); |
| 35742 | 2062 } |
| 2063 | |
| 2064 static expr_ty | |
|
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2065 ast_for_testlist(struct compiling *c, const node* n) |
| 35742 | 2066 { |
|
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2067 /* testlist_comp: test (comp_for | (',' test)* [',']) */ |
|
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2068 /* testlist: test (',' test)* [','] */ |
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2069 /* testlist1: test (',' test)* */ |
| 35742 | 2070 assert(NCH(n) > 0); |
|
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2071 if (TYPE(n) == testlist_comp) { |
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2072 if (NCH(n) > 1) |
|
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2073 assert(TYPE(CHILD(n, 1)) != comp_for); |
|
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2074 } |
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2075 else { |
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2076 assert(TYPE(n) == testlist || |
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2077 TYPE(n) == testlist1); |
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2078 } |
| 35742 | 2079 if (NCH(n) == 1) |
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2080 return ast_for_expr(c, CHILD(n, 0)); |
| 35742 | 2081 else { |
| 2082 asdl_seq *tmp = seq_for_testlist(c, n); | |
| 2083 if (!tmp) | |
| 2084 return NULL; | |
|
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2085 return Tuple(tmp, Load, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2086 } |
|
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2087 } |
|
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2088 |
| 35742 | 2089 static stmt_ty |
| 2090 ast_for_expr_stmt(struct compiling *c, const node *n) | |
| 2091 { | |
| 2092 REQ(n, expr_stmt); | |
|
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2093 /* expr_stmt: testlist (augassign (yield_expr|testlist) |
| 35742 | 2094 | ('=' (yield_expr|testlist))*) |
| 2095 testlist: test (',' test)* [','] | |
| 2096 augassign: '+=' | '-=' | '*=' | '/=' | '%=' | '&=' | '|=' | '^=' | |
|
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2097 | '<<=' | '>>=' | '**=' | '//=' |
| 35742 | 2098 test: ... here starts the operator precendence dance |
| 2099 */ | |
| 2100 | |
| 2101 if (NCH(n) == 1) { | |
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2102 expr_ty e = ast_for_testlist(c, CHILD(n, 0)); |
| 35742 | 2103 if (!e) |
| 2104 return NULL; | |
| 2105 | |
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2106 return Expr(e, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2107 } |
| 2108 else if (TYPE(CHILD(n, 1)) == augassign) { | |
| 2109 expr_ty expr1, expr2; | |
|
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2110 operator_ty newoperator; |
|
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2111 node *ch = CHILD(n, 0); |
| 35742 | 2112 |
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2113 expr1 = ast_for_testlist(c, ch); |
| 35742 | 2114 if (!expr1) |
| 2115 return NULL; | |
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2116 if(!set_context(c, expr1, Store, ch)) |
|
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2117 return NULL; |
|
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2118 /* set_context checks that most expressions are not the left side. |
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2119 Augmented assignments can only have a name, a subscript, or an |
|
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2120 attribute on the left, though, so we have to explicitly check for |
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2121 those. */ |
|
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2122 switch (expr1->kind) { |
|
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2123 case Name_kind: |
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2124 case Attribute_kind: |
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2125 case Subscript_kind: |
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2126 break; |
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2127 default: |
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2128 ast_error(ch, "illegal expression for augmented assignment"); |
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2129 return NULL; |
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2130 } |
| 35742 | 2131 |
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2132 ch = CHILD(n, 2); |
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2133 if (TYPE(ch) == testlist) |
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2134 expr2 = ast_for_testlist(c, ch); |
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2135 else |
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2136 expr2 = ast_for_expr(c, ch); |
|
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|
2137 if (!expr2) |
| 35742 | 2138 return NULL; |
| 2139 | |
|
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2140 newoperator = ast_for_augassign(c, CHILD(n, 1)); |
|
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2141 if (!newoperator) |
| 35742 | 2142 return NULL; |
| 2143 | |
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2144 return AugAssign(expr1, newoperator, expr2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2145 } |
| 2146 else { | |
|
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2147 int i; |
|
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2148 asdl_seq *targets; |
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2149 node *value; |
| 35742 | 2150 expr_ty expression; |
| 2151 | |
|
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2152 /* a normal assignment */ |
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2153 REQ(CHILD(n, 1), EQUAL); |
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2154 targets = asdl_seq_new(NCH(n) / 2, c->c_arena); |
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2155 if (!targets) |
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2156 return NULL; |
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2157 for (i = 0; i < NCH(n) - 2; i += 2) { |
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2158 expr_ty e; |
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2159 node *ch = CHILD(n, i); |
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2160 if (TYPE(ch) == yield_expr) { |
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2161 ast_error(ch, "assignment to yield expression not possible"); |
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2162 return NULL; |
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2163 } |
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|
2164 e = ast_for_testlist(c, ch); |
|
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|
2165 if (!e) |
|
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|
2166 return NULL; |
| 35742 | 2167 |
|
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2168 /* set context to assign */ |
|
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2169 if (!set_context(c, e, Store, CHILD(n, i))) |
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2170 return NULL; |
| 35742 | 2171 |
|
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2172 asdl_seq_SET(targets, i / 2, e); |
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2173 } |
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2174 value = CHILD(n, NCH(n) - 1); |
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|
2175 if (TYPE(value) == testlist) |
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|
2176 expression = ast_for_testlist(c, value); |
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2177 else |
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2178 expression = ast_for_expr(c, value); |
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2179 if (!expression) |
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|
2180 return NULL; |
|
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|
2181 return Assign(targets, expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2182 } |
| 2183 } | |
| 2184 | |
| 2185 static asdl_seq * | |
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|
2186 ast_for_exprlist(struct compiling *c, const node *n, expr_context_ty context) |
| 35742 | 2187 { |
| 2188 asdl_seq *seq; | |
| 2189 int i; | |
| 2190 expr_ty e; | |
| 2191 | |
| 2192 REQ(n, exprlist); | |
| 2193 | |
|
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|
2194 seq = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
| 35742 | 2195 if (!seq) |
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2196 return NULL; |
| 35742 | 2197 for (i = 0; i < NCH(n); i += 2) { |
|
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2198 e = ast_for_expr(c, CHILD(n, i)); |
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2199 if (!e) |
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2200 return NULL; |
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2201 asdl_seq_SET(seq, i / 2, e); |
|
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2202 if (context && !set_context(c, e, context, CHILD(n, i))) |
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2203 return NULL; |
| 35742 | 2204 } |
| 2205 return seq; | |
| 2206 } | |
| 2207 | |
| 2208 static stmt_ty | |
| 2209 ast_for_del_stmt(struct compiling *c, const node *n) | |
| 2210 { | |
| 2211 asdl_seq *expr_list; | |
|
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2212 |
| 35742 | 2213 /* del_stmt: 'del' exprlist */ |
| 2214 REQ(n, del_stmt); | |
| 2215 | |
| 2216 expr_list = ast_for_exprlist(c, CHILD(n, 1), Del); | |
| 2217 if (!expr_list) | |
| 2218 return NULL; | |
|
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2219 return Delete(expr_list, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2220 } |
| 2221 | |
| 2222 static stmt_ty | |
| 2223 ast_for_flow_stmt(struct compiling *c, const node *n) | |
| 2224 { | |
| 2225 /* | |
| 2226 flow_stmt: break_stmt | continue_stmt | return_stmt | raise_stmt | |
| 2227 | yield_stmt | |
| 2228 break_stmt: 'break' | |
| 2229 continue_stmt: 'continue' | |
| 2230 return_stmt: 'return' [testlist] | |
| 2231 yield_stmt: yield_expr | |
| 2232 yield_expr: 'yield' testlist | |
| 2233 raise_stmt: 'raise' [test [',' test [',' test]]] | |
| 2234 */ | |
| 2235 node *ch; | |
| 2236 | |
| 2237 REQ(n, flow_stmt); | |
| 2238 ch = CHILD(n, 0); | |
| 2239 switch (TYPE(ch)) { | |
| 2240 case break_stmt: | |
|
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2241 return Break(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2242 case continue_stmt: |
|
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changeset
|
2243 return Continue(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2244 case yield_stmt: { /* will reduce to yield_expr */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2245 expr_ty exp = ast_for_expr(c, CHILD(ch, 0)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2246 if (!exp) |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2247 return NULL; |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2248 return Expr(exp, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2249 } |
| 2250 case return_stmt: | |
| 2251 if (NCH(ch) == 1) | |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2252 return Return(NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2253 else { |
|
35798
857f68fba275
Write a separate ast_for_testlist_gexp() function instead of overloading
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
35771
diff
changeset
|
2254 expr_ty expression = ast_for_testlist(c, CHILD(ch, 1)); |
| 35742 | 2255 if (!expression) |
| 2256 return NULL; | |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2257 return Return(expression, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2258 } |
| 2259 case raise_stmt: | |
| 2260 if (NCH(ch) == 1) | |
|
43102
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2261 return Raise(NULL, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2262 else if (NCH(ch) >= 2) { |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2263 expr_ty cause = NULL; |
| 35742 | 2264 expr_ty expression = ast_for_expr(c, CHILD(ch, 1)); |
| 2265 if (!expression) | |
| 2266 return NULL; | |
|
43102
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2267 if (NCH(ch) == 4) { |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2268 cause = ast_for_expr(c, CHILD(ch, 3)); |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2269 if (!cause) |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2270 return NULL; |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2271 } |
|
981ecc526703
Issue #1066: implement PEP 3109, 2/3 of PEP 3134.
Collin Winter <collinw@gmail.com>
parents:
42597
diff
changeset
|
2272 return Raise(expression, cause, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2273 } |
| 2274 default: | |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2275 PyErr_Format(PyExc_SystemError, |
| 35742 | 2276 "unexpected flow_stmt: %d", TYPE(ch)); |
| 2277 return NULL; | |
| 2278 } | |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2279 |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2280 PyErr_SetString(PyExc_SystemError, "unhandled flow statement"); |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2281 return NULL; |
| 35742 | 2282 } |
| 2283 | |
| 2284 static alias_ty | |
|
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
|
2285 alias_for_import_name(struct compiling *c, const node *n) |
| 35742 | 2286 { |
| 2287 /* | |
|
36742
658f8ff2a442
Make 'as' an actual keyword when with's future statement is used. Not
Thomas Wouters <thomas@python.org>
parents:
36718
diff
changeset
|
2288 import_as_name: NAME ['as' NAME] |
|
658f8ff2a442
Make 'as' an actual keyword when with's future statement is used. Not
Thomas Wouters <thomas@python.org>
parents:
36718
diff
changeset
|
2289 dotted_as_name: dotted_name ['as' NAME] |
| 35742 | 2290 dotted_name: NAME ('.' NAME)* |
| 2291 */ | |
|
49844
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
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49797
diff
changeset
|
2292 PyObject *str, *name; |
|
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
|
2293 |
| 35742 | 2294 loop: |
| 2295 switch (TYPE(n)) { | |
| 2296 case import_as_name: | |
|
39442
654c380cf8b9
Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
38453
diff
changeset
|
2297 str = NULL; |
|
654c380cf8b9
Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
38453
diff
changeset
|
2298 if (NCH(n) == 3) { |
|
654c380cf8b9
Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
38453
diff
changeset
|
2299 str = NEW_IDENTIFIER(CHILD(n, 2)); |
|
49844
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2300 if (!str) |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2301 return NULL; |
|
39442
654c380cf8b9
Merged revisions 46753-51188 via svnmerge from
Thomas Wouters <thomas@python.org>
parents:
38453
diff
changeset
|
2302 } |
|
49844
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2303 name = NEW_IDENTIFIER(CHILD(n, 0)); |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2304 if (!name) |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2305 return NULL; |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2306 return alias(name, str, c->c_arena); |
| 35742 | 2307 case dotted_as_name: |
| 2308 if (NCH(n) == 1) { | |
| 2309 n = CHILD(n, 0); | |
| 2310 goto loop; | |
| 2311 } | |
| 2312 else { | |
|
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
|
2313 alias_ty a = alias_for_import_name(c, CHILD(n, 0)); |
|
39610
3674f20ac781
Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
39442
diff
changeset
|
2314 if (!a) |
|
3674f20ac781
Merge current trunk into p3yk. This includes the PyNumber_Index API change,
Thomas Wouters <thomas@python.org>
parents:
39442
diff
changeset
|
2315 return NULL; |
| 35742 | 2316 assert(!a->asname); |
| 2317 a->asname = NEW_IDENTIFIER(CHILD(n, 2)); | |
|
49844
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2318 if (!a->asname) |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2319 return NULL; |
| 35742 | 2320 return a; |
| 2321 } | |
| 2322 break; | |
| 2323 case dotted_name: | |
|
49844
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2324 if (NCH(n) == 1) { |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2325 name = NEW_IDENTIFIER(CHILD(n, 0)); |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2326 if (!name) |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2327 return NULL; |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2328 return alias(name, NULL, c->c_arena); |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
Benjamin Peterson <benjamin@python.org>
parents:
49797
diff
changeset
|
2329 } |
| 35742 | 2330 else { |
| 2331 /* Create a string of the form "a.b.c" */ | |
|
36242
0f5189607264
Repair bizarre indentation created by VC 7.1.
Tim Peters <tim.peters@gmail.com>
parents:
36241
diff
changeset
|
2332 int i; |
|
36241
557e9b6ee7e1
alias_for_import_name(): Dueling compiler warnings ;-)
Tim Peters <tim.peters@gmail.com>
parents:
36231
diff
changeset
|
2333 size_t len; |
| 35742 | 2334 char *s; |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2335 PyObject *uni; |
| 35742 | 2336 |
| 2337 len = 0; | |
| 2338 for (i = 0; i < NCH(n); i += 2) | |
| 2339 /* length of string plus one for the dot */ | |
| 2340 len += strlen(STR(CHILD(n, i))) + 1; | |
| 2341 len--; /* the last name doesn't have a dot */ | |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
2342 str = PyBytes_FromStringAndSize(NULL, len); |
| 35742 | 2343 if (!str) |
| 2344 return NULL; | |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
2345 s = PyBytes_AS_STRING(str); |
| 35742 | 2346 if (!s) |
| 2347 return NULL; | |
| 2348 for (i = 0; i < NCH(n); i += 2) { | |
| 2349 char *sch = STR(CHILD(n, i)); | |
| 2350 strcpy(s, STR(CHILD(n, i))); | |
| 2351 s += strlen(sch); | |
| 2352 *s++ = '.'; | |
| 2353 } | |
| 2354 --s; | |
| 2355 *s = '\0'; | |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2356 uni = PyUnicode_DecodeUTF8(PyBytes_AS_STRING(str), |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
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diff
changeset
|
2357 PyBytes_GET_SIZE(str), |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
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parents:
56955
diff
changeset
|
2358 NULL); |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2359 Py_DECREF(str); |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2360 if (!uni) |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2361 return NULL; |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2362 str = uni; |
|
42013
cd125fe83051
Make identifiers str (not str8) objects throughout.
Martin v. Löwis <martin@v.loewis.de>
parents:
41969
diff
changeset
|
2363 PyUnicode_InternInPlace(&str); |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2364 PyArena_AddPyObject(c->c_arena, str); |
|
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
|
2365 return alias(str, NULL, c->c_arena); |
| 35742 | 2366 } |
| 2367 break; | |
| 2368 case STAR: | |
|
42013
cd125fe83051
Make identifiers str (not str8) objects throughout.
Martin v. Löwis <martin@v.loewis.de>
parents:
41969
diff
changeset
|
2369 str = PyUnicode_InternFromString("*"); |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2370 PyArena_AddPyObject(c->c_arena, str); |
|
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
|
2371 return alias(str, NULL, c->c_arena); |
| 35742 | 2372 default: |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2373 PyErr_Format(PyExc_SystemError, |
| 35742 | 2374 "unexpected import name: %d", TYPE(n)); |
| 2375 return NULL; | |
| 2376 } | |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2377 |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2378 PyErr_SetString(PyExc_SystemError, "unhandled import name condition"); |
| 35742 | 2379 return NULL; |
| 2380 } | |
| 2381 | |
| 2382 static stmt_ty | |
| 2383 ast_for_import_stmt(struct compiling *c, const node *n) | |
| 2384 { | |
| 2385 /* | |
| 2386 import_stmt: import_name | import_from | |
| 2387 import_name: 'import' dotted_as_names | |
|
41235
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2388 import_from: 'from' (('.' | '...')* dotted_name | ('.' | '...')+) |
|
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2389 'import' ('*' | '(' import_as_names ')' | import_as_names) |
| 35742 | 2390 */ |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2391 int lineno; |
|
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2392 int col_offset; |
| 35742 | 2393 int i; |
| 2394 asdl_seq *aliases; | |
| 2395 | |
| 2396 REQ(n, import_stmt); | |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2397 lineno = LINENO(n); |
|
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2398 col_offset = n->n_col_offset; |
| 35742 | 2399 n = CHILD(n, 0); |
|
36682
52cbc447e1c9
And some more cleanup.
Thomas Wouters <thomas@python.org>
parents:
36681
diff
changeset
|
2400 if (TYPE(n) == import_name) { |
| 35742 | 2401 n = CHILD(n, 1); |
|
40450
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2402 REQ(n, dotted_as_names); |
|
cc992d75d5b3
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Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2403 aliases = asdl_seq_new((NCH(n) + 1) / 2, c->c_arena); |
|
cc992d75d5b3
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parents:
40215
diff
changeset
|
2404 if (!aliases) |
|
cc992d75d5b3
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parents:
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diff
changeset
|
2405 return NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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parents:
40215
diff
changeset
|
2406 for (i = 0; i < NCH(n); i += 2) { |
|
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
|
2407 alias_ty import_alias = alias_for_import_name(c, CHILD(n, i)); |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2408 if (!import_alias) |
| 35742 | 2409 return NULL; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2410 asdl_seq_SET(aliases, i / 2, import_alias); |
| 35742 | 2411 } |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2412 return Import(aliases, lineno, col_offset, c->c_arena); |
| 35742 | 2413 } |
|
36682
52cbc447e1c9
And some more cleanup.
Thomas Wouters <thomas@python.org>
parents:
36681
diff
changeset
|
2414 else if (TYPE(n) == import_from) { |
| 35742 | 2415 int n_children; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2416 int idx, ndots = 0; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2417 alias_ty mod = NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2418 identifier modname; |
|
61467
f197407bdba2
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changeset
|
2419 |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2420 /* 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
|
2421 optional module name */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2422 for (idx = 1; idx < NCH(n); idx++) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2423 if (TYPE(CHILD(n, idx)) == dotted_name) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2424 mod = alias_for_import_name(c, CHILD(n, idx)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2425 idx++; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2426 break; |
|
41235
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2427 } 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
|
2428 /* 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
|
2429 ndots += 3; |
|
6c8c33a43a15
"from ... import x" should not be a syntax error... make
Georg Brandl <georg@python.org>
parents:
41230
diff
changeset
|
2430 continue; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2431 } 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
|
2432 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2433 } |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2434 ndots++; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2435 } |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2436 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
|
2437 switch (TYPE(CHILD(n, idx))) { |
|
36681
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2438 case STAR: |
|
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2439 /* from ... import * */ |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2440 n = CHILD(n, idx); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2441 n_children = 1; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2442 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2443 case LPAR: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2444 /* from ... import (x, y, z) */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2445 n = CHILD(n, idx + 1); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2446 n_children = NCH(n); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2447 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2448 case import_as_names: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2449 /* from ... import x, y, z */ |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2450 n = CHILD(n, idx); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2451 n_children = NCH(n); |
|
36681
e9f0db429f2b
Clean up from-import handling.
Thomas Wouters <thomas@python.org>
parents:
36679
diff
changeset
|
2452 if (n_children % 2 == 0) { |
| 35742 | 2453 ast_error(n, "trailing comma not allowed without" |
| 2454 " surrounding parentheses"); | |
| 2455 return NULL; | |
| 2456 } | |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2457 break; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2458 default: |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2459 ast_error(n, "Unexpected node-type in from-import"); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2460 return NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2461 } |
| 35742 | 2462 |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2463 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
|
2464 if (!aliases) |
| 35742 | 2465 return NULL; |
| 2466 | |
| 2467 /* 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
|
2468 if (TYPE(n) == STAR) { |
|
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
|
2469 alias_ty import_alias = alias_for_import_name(c, n); |
|
36072
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2470 if (!import_alias) |
| 35742 | 2471 return NULL; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2472 asdl_seq_SET(aliases, 0, import_alias); |
| 35742 | 2473 } |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2474 else { |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2475 for (i = 0; i < NCH(n); i += 2) { |
|
36718
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2476 alias_ty import_alias = alias_for_import_name(c, CHILD(n, i)); |
|
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2477 if (!import_alias) |
|
45e6f901902c
Remove asdl_seq_APPEND() and simplify asdl seq implementation.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
36712
diff
changeset
|
2478 return NULL; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2479 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
|
2480 } |
| 35742 | 2481 } |
|
36712
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2482 if (mod != NULL) |
|
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2483 modname = mod->name; |
|
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2484 else |
|
5c36c222e7ca
SF patch #1438387, PEP 328: relative and absolute imports.
Thomas Wouters <thomas@python.org>
parents:
36695
diff
changeset
|
2485 modname = new_identifier("", c->c_arena); |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2486 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
|
2487 c->c_arena); |
| 35742 | 2488 } |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2489 PyErr_Format(PyExc_SystemError, |
| 35742 | 2490 "unknown import statement: starts with command '%s'", |
| 2491 STR(CHILD(n, 0))); | |
| 2492 return NULL; | |
| 2493 } | |
| 2494 | |
| 2495 static stmt_ty | |
| 2496 ast_for_global_stmt(struct compiling *c, const node *n) | |
| 2497 { | |
| 2498 /* global_stmt: 'global' NAME (',' NAME)* */ | |
| 2499 identifier name; | |
| 2500 asdl_seq *s; | |
| 2501 int i; | |
| 2502 | |
| 2503 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
|
2504 s = asdl_seq_new(NCH(n) / 2, c->c_arena); |
| 35742 | 2505 if (!s) |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2506 return NULL; |
| 35742 | 2507 for (i = 1; i < NCH(n); i += 2) { |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2508 name = NEW_IDENTIFIER(CHILD(n, i)); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2509 if (!name) |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2510 return NULL; |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2511 asdl_seq_SET(s, i / 2, name); |
| 35742 | 2512 } |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
2513 return Global(s, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2514 } |
| 2515 | |
| 2516 static stmt_ty | |
|
40965
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2517 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
|
2518 { |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2519 /* nonlocal_stmt: 'nonlocal' NAME (',' NAME)* */ |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2520 identifier name; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2521 asdl_seq *s; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2522 int i; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2523 |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2524 REQ(n, nonlocal_stmt); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2525 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
|
2526 if (!s) |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2527 return NULL; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2528 for (i = 1; i < NCH(n); i += 2) { |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2529 name = NEW_IDENTIFIER(CHILD(n, i)); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2530 if (!name) |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2531 return NULL; |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2532 asdl_seq_SET(s, i / 2, name); |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2533 } |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2534 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
|
2535 } |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2536 |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
40941
diff
changeset
|
2537 static stmt_ty |
| 35742 | 2538 ast_for_assert_stmt(struct compiling *c, const node *n) |
| 2539 { | |
| 2540 /* assert_stmt: 'assert' test [',' test] */ | |
| 2541 REQ(n, assert_stmt); | |
| 2542 if (NCH(n) == 2) { | |
| 2543 expr_ty expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2544 if (!expression) | |
| 2545 return NULL; | |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2546 return Assert(expression, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2547 } |
| 2548 else if (NCH(n) == 4) { | |
| 2549 expr_ty expr1, expr2; | |
| 2550 | |
| 2551 expr1 = ast_for_expr(c, CHILD(n, 1)); | |
| 2552 if (!expr1) | |
| 2553 return NULL; | |
| 2554 expr2 = ast_for_expr(c, CHILD(n, 3)); | |
| 2555 if (!expr2) | |
| 2556 return NULL; | |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
2557 |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2558 return Assert(expr1, expr2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2559 } |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
2560 PyErr_Format(PyExc_SystemError, |
| 35742 | 2561 "improper number of parts to 'assert' statement: %d", |
| 2562 NCH(n)); | |
| 2563 return NULL; | |
| 2564 } | |
| 2565 | |
| 2566 static asdl_seq * | |
| 2567 ast_for_suite(struct compiling *c, const node *n) | |
| 2568 { | |
| 2569 /* 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
|
2570 asdl_seq *seq; |
| 35742 | 2571 stmt_ty s; |
| 2572 int i, total, num, end, pos = 0; | |
| 2573 node *ch; | |
| 2574 | |
| 2575 REQ(n, suite); | |
| 2576 | |
| 2577 total = num_stmts(n); | |
|
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
|
2578 seq = asdl_seq_new(total, c->c_arena); |
| 35742 | 2579 if (!seq) |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2580 return NULL; |
| 35742 | 2581 if (TYPE(CHILD(n, 0)) == simple_stmt) { |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2582 n = CHILD(n, 0); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
2583 /* simple_stmt always ends with a NEWLINE, |
|
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|
2584 and may have a trailing SEMI |
|
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|
2585 */ |
|
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|
2586 end = NCH(n) - 1; |
|
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|
2587 if (TYPE(CHILD(n, end - 1)) == SEMI) |
|
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|
2588 end--; |
| 35742 | 2589 /* loop by 2 to skip semi-colons */ |
|
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|
2590 for (i = 0; i < end; i += 2) { |
|
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|
2591 ch = CHILD(n, i); |
|
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|
2592 s = ast_for_stmt(c, ch); |
|
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|
2593 if (!s) |
|
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|
2594 return NULL; |
|
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|
2595 asdl_seq_SET(seq, pos++, s); |
|
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|
2596 } |
| 35742 | 2597 } |
| 2598 else { | |
|
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|
2599 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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|
2600 ch = CHILD(n, i); |
|
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Four months of trunk changes (including a few releases...)
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|
2601 REQ(ch, stmt); |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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|
2602 num = num_stmts(ch); |
|
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Four months of trunk changes (including a few releases...)
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diff
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|
2603 if (num == 1) { |
|
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Four months of trunk changes (including a few releases...)
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|
2604 /* small_stmt or compound_stmt with only one child */ |
|
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|
2605 s = ast_for_stmt(c, ch); |
|
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|
2606 if (!s) |
|
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Four months of trunk changes (including a few releases...)
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|
2607 return NULL; |
|
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Four months of trunk changes (including a few releases...)
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|
2608 asdl_seq_SET(seq, pos++, s); |
|
cc992d75d5b3
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|
2609 } |
|
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changeset
|
2610 else { |
|
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Four months of trunk changes (including a few releases...)
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|
2611 int j; |
|
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Four months of trunk changes (including a few releases...)
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|
2612 ch = CHILD(ch, 0); |
|
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Four months of trunk changes (including a few releases...)
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|
2613 REQ(ch, simple_stmt); |
|
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Four months of trunk changes (including a few releases...)
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|
2614 for (j = 0; j < NCH(ch); j += 2) { |
|
cc992d75d5b3
Four months of trunk changes (including a few releases...)
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diff
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|
2615 /* statement terminates with a semi-colon ';' */ |
|
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Four months of trunk changes (including a few releases...)
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|
2616 if (NCH(CHILD(ch, j)) == 0) { |
|
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Four months of trunk changes (including a few releases...)
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|
2617 assert((j + 1) == NCH(ch)); |
|
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|
2618 break; |
|
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|
2619 } |
|
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diff
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|
2620 s = ast_for_stmt(c, CHILD(ch, j)); |
|
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Four months of trunk changes (including a few releases...)
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|
2621 if (!s) |
|
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Four months of trunk changes (including a few releases...)
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|
2622 return NULL; |
|
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changeset
|
2623 asdl_seq_SET(seq, pos++, s); |
|
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Four months of trunk changes (including a few releases...)
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|
2624 } |
|
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|
2625 } |
|
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|
2626 } |
| 35742 | 2627 } |
| 2628 assert(pos == seq->size); | |
| 2629 return seq; | |
| 2630 } | |
| 2631 | |
| 2632 static stmt_ty | |
| 2633 ast_for_if_stmt(struct compiling *c, const node *n) | |
| 2634 { | |
| 2635 /* if_stmt: 'if' test ':' suite ('elif' test ':' suite)* | |
| 2636 ['else' ':' suite] | |
| 2637 */ | |
| 2638 char *s; | |
| 2639 | |
| 2640 REQ(n, if_stmt); | |
| 2641 | |
| 2642 if (NCH(n) == 4) { | |
| 2643 expr_ty expression; | |
| 2644 asdl_seq *suite_seq; | |
| 2645 | |
| 2646 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2647 if (!expression) | |
| 2648 return NULL; | |
|
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changeset
|
2649 suite_seq = ast_for_suite(c, CHILD(n, 3)); |
|
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
2650 if (!suite_seq) |
| 35742 | 2651 return NULL; |
|
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|
2652 |
|
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|
2653 return If(expression, suite_seq, NULL, LINENO(n), n->n_col_offset, |
|
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changeset
|
2654 c->c_arena); |
| 35742 | 2655 } |
|
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
2656 |
| 35742 | 2657 s = STR(CHILD(n, 4)); |
| 2658 /* s[2], the third character in the string, will be | |
| 2659 's' for el_s_e, or | |
| 2660 'i' for el_i_f | |
| 2661 */ | |
| 2662 if (s[2] == 's') { | |
| 2663 expr_ty expression; | |
| 2664 asdl_seq *seq1, *seq2; | |
| 2665 | |
| 2666 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2667 if (!expression) | |
| 2668 return NULL; | |
| 2669 seq1 = ast_for_suite(c, CHILD(n, 3)); | |
|
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parents:
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changeset
|
2670 if (!seq1) |
| 35742 | 2671 return NULL; |
| 2672 seq2 = ast_for_suite(c, CHILD(n, 6)); | |
|
36072
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Cleanup a bit and make things more consistent.
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parents:
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diff
changeset
|
2673 if (!seq2) |
| 35742 | 2674 return NULL; |
| 2675 | |
|
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|
2676 return If(expression, seq1, seq2, LINENO(n), n->n_col_offset, |
|
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changeset
|
2677 c->c_arena); |
| 35742 | 2678 } |
| 2679 else if (s[2] == 'i') { | |
|
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|
2680 int i, n_elif, has_else = 0; |
|
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|
2681 expr_ty expression; |
|
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|
2682 asdl_seq *suite_seq; |
|
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|
2683 asdl_seq *orelse = NULL; |
|
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|
2684 n_elif = NCH(n) - 4; |
| 35742 | 2685 /* must reference the child n_elif+1 since 'else' token is third, |
| 2686 not fourth, child from the end. */ | |
|
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|
2687 if (TYPE(CHILD(n, (n_elif + 1))) == NAME |
|
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|
2688 && STR(CHILD(n, (n_elif + 1)))[2] == 's') { |
|
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|
2689 has_else = 1; |
|
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|
2690 n_elif -= 3; |
|
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|
2691 } |
|
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changeset
|
2692 n_elif /= 4; |
| 35742 | 2693 |
|
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|
2694 if (has_else) { |
|
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changeset
|
2695 asdl_seq *suite_seq2; |
| 35742 | 2696 |
|
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|
2697 orelse = asdl_seq_new(1, c->c_arena); |
|
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changeset
|
2698 if (!orelse) |
|
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changeset
|
2699 return NULL; |
| 35742 | 2700 expression = ast_for_expr(c, CHILD(n, NCH(n) - 6)); |
|
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changeset
|
2701 if (!expression) |
| 35742 | 2702 return NULL; |
|
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changeset
|
2703 suite_seq = ast_for_suite(c, CHILD(n, NCH(n) - 4)); |
|
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changeset
|
2704 if (!suite_seq) |
|
36072
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Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
2705 return NULL; |
|
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changeset
|
2706 suite_seq2 = ast_for_suite(c, CHILD(n, NCH(n) - 1)); |
|
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changeset
|
2707 if (!suite_seq2) |
| 35742 | 2708 return NULL; |
| 2709 | |
|
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changeset
|
2710 asdl_seq_SET(orelse, 0, |
|
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changeset
|
2711 If(expression, suite_seq, suite_seq2, |
|
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|
2712 LINENO(CHILD(n, NCH(n) - 6)), |
|
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|
2713 CHILD(n, NCH(n) - 6)->n_col_offset, |
|
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changeset
|
2714 c->c_arena)); |
|
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|
2715 /* the just-created orelse handled the last elif */ |
|
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|
2716 n_elif--; |
|
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changeset
|
2717 } |
| 35742 | 2718 |
|
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changeset
|
2719 for (i = 0; i < n_elif; i++) { |
|
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changeset
|
2720 int off = 5 + (n_elif - i - 1) * 4; |
|
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changeset
|
2721 asdl_seq *newobj = asdl_seq_new(1, c->c_arena); |
|
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changeset
|
2722 if (!newobj) |
|
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changeset
|
2723 return NULL; |
| 35742 | 2724 expression = ast_for_expr(c, CHILD(n, off)); |
|
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diff
changeset
|
2725 if (!expression) |
| 35742 | 2726 return NULL; |
| 2727 suite_seq = ast_for_suite(c, CHILD(n, off + 2)); | |
|
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de16a85c3b4c
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diff
changeset
|
2728 if (!suite_seq) |
| 35742 | 2729 return NULL; |
| 2730 | |
|
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|
2731 asdl_seq_SET(newobj, 0, |
|
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|
2732 If(expression, suite_seq, orelse, |
|
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|
2733 LINENO(CHILD(n, off)), |
|
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changeset
|
2734 CHILD(n, off)->n_col_offset, c->c_arena)); |
|
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|
2735 orelse = newobj; |
|
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|
2736 } |
|
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changeset
|
2737 expression = ast_for_expr(c, CHILD(n, 1)); |
|
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|
2738 if (!expression) |
|
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|
2739 return NULL; |
|
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changeset
|
2740 suite_seq = ast_for_suite(c, CHILD(n, 3)); |
|
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|
2741 if (!suite_seq) |
|
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|
2742 return NULL; |
|
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|
2743 return If(expression, suite_seq, orelse, |
|
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|
2744 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2745 } |
|
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|
2746 |
|
de16a85c3b4c
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|
2747 PyErr_Format(PyExc_SystemError, |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
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parents:
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diff
changeset
|
2748 "unexpected token in 'if' statement: %s", s); |
|
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parents:
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diff
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|
2749 return NULL; |
| 35742 | 2750 } |
| 2751 | |
| 2752 static stmt_ty | |
| 2753 ast_for_while_stmt(struct compiling *c, const node *n) | |
| 2754 { | |
| 2755 /* while_stmt: 'while' test ':' suite ['else' ':' suite] */ | |
| 2756 REQ(n, while_stmt); | |
| 2757 | |
| 2758 if (NCH(n) == 4) { | |
| 2759 expr_ty expression; | |
| 2760 asdl_seq *suite_seq; | |
| 2761 | |
| 2762 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2763 if (!expression) | |
| 2764 return NULL; | |
| 2765 suite_seq = ast_for_suite(c, CHILD(n, 3)); | |
|
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|
2766 if (!suite_seq) |
| 35742 | 2767 return NULL; |
|
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40215
diff
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|
2768 return While(expression, suite_seq, NULL, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2769 } |
| 2770 else if (NCH(n) == 7) { | |
| 2771 expr_ty expression; | |
| 2772 asdl_seq *seq1, *seq2; | |
| 2773 | |
| 2774 expression = ast_for_expr(c, CHILD(n, 1)); | |
| 2775 if (!expression) | |
| 2776 return NULL; | |
| 2777 seq1 = ast_for_suite(c, CHILD(n, 3)); | |
|
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parents:
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|
2778 if (!seq1) |
| 35742 | 2779 return NULL; |
| 2780 seq2 = ast_for_suite(c, CHILD(n, 6)); | |
|
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|
2781 if (!seq2) |
| 35742 | 2782 return NULL; |
| 2783 | |
|
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|
2784 return While(expression, seq1, seq2, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2785 } |
|
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|
2786 |
|
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|
2787 PyErr_Format(PyExc_SystemError, |
|
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|
2788 "wrong number of tokens for 'while' statement: %d", |
|
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|
2789 NCH(n)); |
|
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|
2790 return NULL; |
| 35742 | 2791 } |
| 2792 | |
| 2793 static stmt_ty | |
| 2794 ast_for_for_stmt(struct compiling *c, const node *n) | |
| 2795 { | |
|
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|
2796 asdl_seq *_target, *seq = NULL, *suite_seq; |
| 35742 | 2797 expr_ty expression; |
| 2798 expr_ty target; | |
|
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|
2799 const node *node_target; |
| 35742 | 2800 /* for_stmt: 'for' exprlist 'in' testlist ':' suite ['else' ':' suite] */ |
| 2801 REQ(n, for_stmt); | |
| 2802 | |
| 2803 if (NCH(n) == 9) { | |
|
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|
2804 seq = ast_for_suite(c, CHILD(n, 8)); |
| 35742 | 2805 if (!seq) |
| 2806 return NULL; | |
| 2807 } | |
| 2808 | |
|
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|
2809 node_target = CHILD(n, 1); |
|
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|
2810 _target = ast_for_exprlist(c, node_target, Store); |
|
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|
2811 if (!_target) |
| 35742 | 2812 return NULL; |
|
39442
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|
2813 /* Check the # of children rather than the length of _target, since |
|
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|
2814 for x, in ... has 1 element in _target, but still requires a Tuple. */ |
|
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|
2815 if (NCH(node_target) == 1) |
|
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|
2816 target = (expr_ty)asdl_seq_GET(_target, 0); |
| 35742 | 2817 else |
|
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|
2818 target = Tuple(_target, Store, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2819 |
|
35798
857f68fba275
Write a separate ast_for_testlist_gexp() function instead of overloading
Neil Schemenauer <nascheme@enme.ucalgary.ca>
parents:
35771
diff
changeset
|
2820 expression = ast_for_testlist(c, CHILD(n, 3)); |
|
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Cleanup a bit and make things more consistent.
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parents:
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diff
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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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Cleanup a bit and make things more consistent.
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|
2824 if (!suite_seq) |
| 35742 | 2825 return NULL; |
| 2826 | |
|
37879
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Thomas Wouters <thomas@python.org>
parents:
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changeset
|
2827 return For(target, expression, suite_seq, seq, LINENO(n), n->n_col_offset, |
|
f731859e9b3b
Merge p3yk branch with the trunk up to revision 45595. This breaks a fair
Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
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 { | |
|
41824
24b60622b944
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parents:
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diff
changeset
|
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 | |
|
46231
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|
2843 return ExceptHandler(NULL, NULL, suite_seq, LINENO(exc), |
|
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parents:
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changeset
|
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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diff
changeset
|
2854 if (!suite_seq) |
| 35742 | 2855 return NULL; |
| 2856 | |
|
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|
2857 return ExceptHandler(expression, NULL, suite_seq, LINENO(exc), |
|
37879
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parents:
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changeset
|
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
4bab65fcca8e
Some more changes related to the new except syntax and semantics,
Guido van Rossum <guido@python.org>
parents:
40529
diff
changeset
|
2863 identifier e = NEW_IDENTIFIER(CHILD(exc, 3)); |
|
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|
2864 if (!e) |
| 35742 | 2865 return NULL; |
|
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Cleanup a bit and make things more consistent.
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|
2866 expression = ast_for_expr(c, CHILD(exc, 1)); |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
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diff
changeset
|
2867 if (!expression) |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
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parents:
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changeset
|
2868 return NULL; |
| 35742 | 2869 suite_seq = ast_for_suite(c, body); |
|
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Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
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changeset
|
2870 if (!suite_seq) |
| 35742 | 2871 return NULL; |
| 2872 | |
|
46231
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|
2873 return ExceptHandler(expression, e, suite_seq, LINENO(exc), |
|
37879
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Thomas Wouters <thomas@python.org>
parents:
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diff
changeset
|
2874 exc->n_col_offset, c->c_arena); |
| 35742 | 2875 } |
|
36072
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Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
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|
2876 |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
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parents:
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diff
changeset
|
2877 PyErr_Format(PyExc_SystemError, |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2878 "wrong number of children for 'except' clause: %d", |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
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diff
changeset
|
2879 NCH(exc)); |
|
de16a85c3b4c
Cleanup a bit and make things more consistent.
Neal Norwitz <nnorwitz@gmail.com>
parents:
36066
diff
changeset
|
2880 return NULL; |
| 35742 | 2881 } |
| 2882 | |
| 2883 static stmt_ty | |
| 2884 ast_for_try_stmt(struct compiling *c, const node *n) | |
| 2885 { | |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2886 const int nch = NCH(n); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2887 int n_except = (nch - 3)/3; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2888 asdl_seq *body, *orelse = NULL, *finally = NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2889 |
| 35742 | 2890 REQ(n, try_stmt); |
| 2891 | |
|
36066
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2892 body = ast_for_suite(c, CHILD(n, 2)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2893 if (body == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
Neal Norwitz <nnorwitz@gmail.com>
parents:
36065
diff
changeset
|
2894 return 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
|
2895 |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2896 if (TYPE(CHILD(n, nch - 3)) == NAME) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2897 if (strcmp(STR(CHILD(n, nch - 3)), "finally") == 0) { |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2898 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
|
2899 /* we can assume it's an "else", |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2900 because nch >= 9 for try-else-finally and |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2901 it would otherwise have a type of except_clause */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2902 orelse = ast_for_suite(c, CHILD(n, nch - 4)); |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2903 if (orelse == NULL) |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2904 return NULL; |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2905 n_except--; |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2906 } |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2907 |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2908 finally = ast_for_suite(c, CHILD(n, nch - 1)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2909 if (finally == NULL) |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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diff
changeset
|
2910 return 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
|
2911 n_except--; |
|
719ba02d2e2c
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parents:
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diff
changeset
|
2912 } |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2913 else { |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2914 /* we can assume it's an "else", |
|
719ba02d2e2c
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parents:
36065
diff
changeset
|
2915 otherwise it would have a type of except_clause */ |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2916 orelse = ast_for_suite(c, CHILD(n, nch - 1)); |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
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diff
changeset
|
2917 if (orelse == 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
|
2918 return NULL; |
|
719ba02d2e2c
SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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parents:
36065
diff
changeset
|
2919 n_except--; |
|
719ba02d2e2c
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|
2920 } |
| 35742 | 2921 } |
|
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|
2922 else if (TYPE(CHILD(n, nch - 3)) != except_clause) { |
|
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parents:
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|
2923 ast_error(n, "malformed 'try' statement"); |
| 35742 | 2924 return NULL; |
| 2925 } | |
|
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2926 |
|
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|
2927 if (n_except > 0) { |
|
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|
2928 int i; |
|
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|
2929 stmt_ty except_st; |
|
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|
2930 /* process except statements to create a try ... except */ |
|
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|
2931 asdl_seq *handlers = asdl_seq_new(n_except, c->c_arena); |
|
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|
2932 if (handlers == NULL) |
|
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|
2933 return NULL; |
|
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|
2934 |
|
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SF patch #1355913, PEP 341 - Unification of try/except and try/finally
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|
2935 for (i = 0; i < n_except; i++) { |
|
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changeset
|
2936 excepthandler_ty e = ast_for_except_clause(c, CHILD(n, 3 + i * 3), |
|
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|
2937 CHILD(n, 5 + i * 3)); |
|
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|
2938 if (!e) |
|
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|
2939 return NULL; |
|
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|
2940 asdl_seq_SET(handlers, i, e); |
|
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|
2941 } |
|
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2942 |
|
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|
2943 except_st = TryExcept(body, handlers, orelse, LINENO(n), |
|
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Thomas Wouters <thomas@python.org>
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|
2944 n->n_col_offset, c->c_arena); |
|
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|
2945 if (!finally) |
|
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|
2946 return except_st; |
|
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|
2947 |
|
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|
2948 /* if a 'finally' is present too, we nest the TryExcept within a |
|
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|
2949 TryFinally to emulate try ... except ... finally */ |
|
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2950 body = asdl_seq_new(1, c->c_arena); |
|
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|
2951 if (body == NULL) |
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|
2952 return NULL; |
|
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|
2953 asdl_seq_SET(body, 0, except_st); |
|
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|
2954 } |
|
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|
2955 |
|
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|
2956 /* must be a try ... finally (except clauses are in body, if any exist) */ |
|
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diff
changeset
|
2957 assert(finally != NULL); |
|
36786
57322cb2ca11
Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
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diff
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|
2958 return TryFinally(body, finally, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 2959 } |
| 2960 | |
|
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|
2961 /* with_item: test ['as' expr] */ |
|
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PEP 343 -- the with-statement.
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|
2962 static stmt_ty |
|
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|
2963 ast_for_with_item(struct compiling *c, const node *n, asdl_seq *content) |
|
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|
2964 { |
|
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|
2965 expr_ty context_expr, optional_vars = NULL; |
|
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|
2966 |
|
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|
2967 REQ(n, with_item); |
|
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|
2968 context_expr = ast_for_expr(c, CHILD(n, 0)); |
|
64183
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|
2969 if (!context_expr) |
|
54c9c86ad104
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|
2970 return NULL; |
|
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|
2971 if (NCH(n) == 3) { |
|
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|
2972 optional_vars = ast_for_expr(c, CHILD(n, 2)); |
|
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|
2973 |
|
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|
2974 if (!optional_vars) { |
|
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|
2975 return NULL; |
|
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|
2976 } |
|
46664
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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
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|
2977 if (!set_context(c, optional_vars, Store, n)) { |
|
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|
2978 return NULL; |
|
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|
2979 } |
|
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|
2980 } |
|
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|
2981 |
|
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|
2982 return With(context_expr, optional_vars, content, LINENO(n), |
|
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|
2983 n->n_col_offset, c->c_arena); |
|
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|
2984 } |
|
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|
2985 |
|
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|
2986 /* with_stmt: 'with' with_item (',' with_item)* ':' suite */ |
|
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|
2987 static stmt_ty |
|
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|
2988 ast_for_with_stmt(struct compiling *c, const node *n) |
|
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|
2989 { |
|
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|
2990 int i; |
|
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|
2991 stmt_ty ret; |
|
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|
2992 asdl_seq *inner; |
|
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|
2993 |
|
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|
2994 REQ(n, with_stmt); |
|
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|
2995 |
|
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|
2996 /* process the with items inside-out */ |
|
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|
2997 i = NCH(n) - 1; |
|
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|
2998 /* the suite of the innermost with item is the suite of the with stmt */ |
|
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|
2999 inner = ast_for_suite(c, CHILD(n, i)); |
|
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|
3000 if (!inner) |
|
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|
3001 return NULL; |
|
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|
3002 |
|
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|
3003 for (;;) { |
|
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|
3004 i -= 2; |
|
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|
3005 ret = ast_for_with_item(c, CHILD(n, i), inner); |
|
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|
3006 if (!ret) |
|
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|
3007 return NULL; |
|
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|
3008 /* was this the last item? */ |
|
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|
3009 if (i == 1) |
|
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|
3010 break; |
|
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|
3011 /* if not, wrap the result so far in a new sequence */ |
|
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|
3012 inner = asdl_seq_new(1, c->c_arena); |
|
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|
3013 if (!inner) |
|
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|
3014 return NULL; |
|
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changeset
|
3015 asdl_seq_SET(inner, 0, ret); |
|
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|
3016 } |
|
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|
3017 |
|
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|
3018 return ret; |
|
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|
3019 } |
|
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|
3020 |
| 35742 | 3021 static stmt_ty |
|
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|
3022 ast_for_classdef(struct compiling *c, const node *n, asdl_seq *decorator_seq) |
| 35742 | 3023 { |
|
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|
3024 /* classdef: 'class' NAME ['(' arglist ')'] ':' suite */ |
|
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|
3025 PyObject *classname; |
|
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|
3026 asdl_seq *s; |
|
49852
30d01a5f517e
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|
3027 expr_ty call; |
|
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3028 |
| 35742 | 3029 REQ(n, classdef); |
| 3030 | |
|
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|
3031 if (NCH(n) == 4) { /* class NAME ':' suite */ |
| 35742 | 3032 s = ast_for_suite(c, CHILD(n, 3)); |
| 3033 if (!s) | |
| 3034 return NULL; | |
|
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changeset
|
3035 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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|
3036 if (!classname) |
|
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|
3037 return NULL; |
|
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|
3038 return ClassDef(classname, NULL, NULL, NULL, NULL, s, decorator_seq, |
|
40b7277e665f
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changeset
|
3039 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3040 } |
|
41226
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3041 |
|
19f7ff443718
Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3042 if (TYPE(CHILD(n, 3)) == RPAR) { /* class NAME '(' ')' ':' suite */ |
|
40450
cc992d75d5b3
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parents:
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|
3043 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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|
3044 if (!s) |
|
49844
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|
3045 return NULL; |
|
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parents:
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changeset
|
3046 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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Merged revisions 67373 via svnmerge from
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|
3047 if (!classname) |
|
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parents:
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|
3048 return NULL; |
|
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parents:
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|
3049 return ClassDef(classname, NULL, NULL, NULL, NULL, s, decorator_seq, |
|
40b7277e665f
Merged revisions 67373 via svnmerge from
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changeset
|
3050 LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3051 } |
| 3052 | |
|
41226
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Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
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changeset
|
3053 /* class NAME '(' arglist ')' ':' suite */ |
|
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Implement PEP 3115 -- new metaclass syntax and semantics.
Guido van Rossum <guido@python.org>
parents:
40965
diff
changeset
|
3054 /* build up a fake Call node so we can extract its pieces */ |
|
49852
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check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
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|
3055 { |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
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parents:
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|
3056 PyObject *dummy_name; |
|
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check the return value of NEW_IDENTIFIER in some more places
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parents:
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diff
changeset
|
3057 expr_ty dummy; |
|
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check the return value of NEW_IDENTIFIER in some more places
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parents:
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changeset
|
3058 dummy_name = NEW_IDENTIFIER(CHILD(n, 1)); |
|
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check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
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changeset
|
3059 if (!dummy_name) |
|
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check the return value of NEW_IDENTIFIER in some more places
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parents:
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|
3060 return NULL; |
|
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check the return value of NEW_IDENTIFIER in some more places
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changeset
|
3061 dummy = Name(dummy_name, Load, LINENO(n), n->n_col_offset, c->c_arena); |
|
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changeset
|
3062 call = ast_for_call(c, CHILD(n, 3), dummy); |
|
30d01a5f517e
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|
3063 if (!call) |
|
30d01a5f517e
check the return value of NEW_IDENTIFIER in some more places
Benjamin Peterson <benjamin@python.org>
parents:
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|
3064 return NULL; |
|
30d01a5f517e
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changeset
|
3065 } |
| 35742 | 3066 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
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changeset
|
3067 if (!s) |
| 35742 | 3068 return NULL; |
|
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|
3069 classname = NEW_IDENTIFIER(CHILD(n, 1)); |
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|
3070 if (!classname) |
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|
3071 return NULL; |
|
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Guido van Rossum <guido@python.org>
parents:
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|
3072 |
|
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|
3073 return ClassDef(classname, call->v.Call.args, call->v.Call.keywords, |
|
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parents:
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|
3074 call->v.Call.starargs, call->v.Call.kwargs, s, |
|
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changeset
|
3075 decorator_seq, LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3076 } |
| 3077 | |
| 3078 static stmt_ty | |
| 3079 ast_for_stmt(struct compiling *c, const node *n) | |
| 3080 { | |
| 3081 if (TYPE(n) == stmt) { | |
|
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|
3082 assert(NCH(n) == 1); |
|
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|
3083 n = CHILD(n, 0); |
| 35742 | 3084 } |
| 3085 if (TYPE(n) == simple_stmt) { | |
|
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|
3086 assert(num_stmts(n) == 1); |
|
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|
3087 n = CHILD(n, 0); |
| 35742 | 3088 } |
| 3089 if (TYPE(n) == small_stmt) { | |
|
40529
54cd47788811
PEP 3107 - Function Annotations thanks to Tony Lownds
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parents:
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changeset
|
3090 n = CHILD(n, 0); |
|
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Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
3091 /* small_stmt: expr_stmt | del_stmt | pass_stmt | flow_stmt |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
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|
3092 | import_stmt | global_stmt | nonlocal_stmt | assert_stmt |
|
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3093 */ |
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|
3094 switch (TYPE(n)) { |
| 35742 | 3095 case expr_stmt: |
| 3096 return ast_for_expr_stmt(c, n); | |
| 3097 case del_stmt: | |
| 3098 return ast_for_del_stmt(c, n); | |
| 3099 case pass_stmt: | |
|
36786
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Patch #1440601: Add col_offset attribute to AST nodes.
Martin v. Löwis <martin@v.loewis.de>
parents:
36780
diff
changeset
|
3100 return Pass(LINENO(n), n->n_col_offset, c->c_arena); |
| 35742 | 3101 case flow_stmt: |
| 3102 return ast_for_flow_stmt(c, n); | |
| 3103 case import_stmt: | |
| 3104 return ast_for_import_stmt(c, n); | |
| 3105 case global_stmt: | |
| 3106 return ast_for_global_stmt(c, n); | |
|
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parents:
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|
3107 case nonlocal_stmt: |
|
30e5cb3a55ac
Provisional implementation of PEP 3104.
Jeremy Hylton <jeremy@alum.mit.edu>
parents:
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diff
changeset
|
3108 return ast_for_nonlocal_stmt(c, n); |
| 35742 | 3109 case assert_stmt: |
| 3110 return ast_for_assert_stmt(c, n); | |
| 3111 default: | |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
3112 PyErr_Format(PyExc_SystemError, |
| 35742 | 3113 "unhandled small_stmt: TYPE=%d NCH=%d\n", |
| 3114 TYPE(n), NCH(n)); | |
| 3115 return NULL; | |
| 3116 } | |
| 3117 } | |
| 3118 else { | |
| 3119 /* compound_stmt: if_stmt | while_stmt | for_stmt | try_stmt | |
|
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|
3120 | funcdef | classdef | decorated |
|
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|
3121 */ |
|
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|
3122 node *ch = CHILD(n, 0); |
|
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|
3123 REQ(n, compound_stmt); |
|
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|
3124 switch (TYPE(ch)) { |
| 35742 | 3125 case if_stmt: |
| 3126 return ast_for_if_stmt(c, ch); | |
| 3127 case while_stmt: | |
| 3128 return ast_for_while_stmt(c, ch); | |
| 3129 case for_stmt: | |
| 3130 return ast_for_for_stmt(c, ch); | |
| 3131 case try_stmt: | |
| 3132 return ast_for_try_stmt(c, ch); | |
|
36695
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3133 case with_stmt: |
|
b6d2f6fd3e11
PEP 343 -- the with-statement.
Guido van Rossum <guido@python.org>
parents:
36686
diff
changeset
|
3134 return ast_for_with_stmt(c, ch); |
| 35742 | 3135 case funcdef: |
|
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|
3136 return ast_for_funcdef(c, ch, NULL); |
| 35742 | 3137 case classdef: |
|
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|
3138 return ast_for_classdef(c, ch, NULL); |
|
61467
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Antoine Pitrou <solipsis@pitrou.net>
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|
3139 case decorated: |
|
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
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changeset
|
3140 return ast_for_decorated(c, ch); |
| 35742 | 3141 default: |
|
35870
f531c05cd240
Convert all internal errors from Exception to SystemError
Neal Norwitz <nnorwitz@gmail.com>
parents:
35868
diff
changeset
|
3142 PyErr_Format(PyExc_SystemError, |
| 35742 | 3143 "unhandled small_stmt: TYPE=%d NCH=%d\n", |
| 3144 TYPE(n), NCH(n)); | |
| 3145 return NULL; | |
|
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|
3146 } |
| 35742 | 3147 } |
| 3148 } | |
| 3149 | |
| 3150 static PyObject * | |
|
46664
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Christian Heimes <christian@cheimes.de>
parents:
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diff
changeset
|
3151 parsenumber(struct compiling *c, const char *s) |
| 35742 | 3152 { |
|
41554
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|
3153 const char *end; |
|
06145fbc7ab9
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|
3154 long x; |
|
06145fbc7ab9
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changeset
|
3155 double dx; |
| 35742 | 3156 #ifndef WITHOUT_COMPLEX |
|
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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
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changeset
|
3157 Py_complex compl; |
|
41554
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|
3158 int imflag; |
| 35742 | 3159 #endif |
| 3160 | |
|
50035
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Mark Dickinson <dickinsm@gmail.com>
parents:
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diff
changeset
|
3161 assert(s != NULL); |
|
41554
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|
3162 errno = 0; |
|
06145fbc7ab9
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changeset
|
3163 end = s + strlen(s) - 1; |
| 35742 | 3164 #ifndef WITHOUT_COMPLEX |
|
41554
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|
3165 imflag = *end == 'j' || *end == 'J'; |
| 35742 | 3166 #endif |
|
41554
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changeset
|
3167 if (s[0] == '0') { |
|
06145fbc7ab9
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changeset
|
3168 x = (long) PyOS_strtoul((char *)s, (char **)&end, 0); |
|
06145fbc7ab9
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|
3169 if (x < 0 && errno == 0) { |
|
06145fbc7ab9
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|
3170 return PyLong_FromString((char *)s, |
|
06145fbc7ab9
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|
3171 (char **)0, |
|
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|
3172 0); |
|
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|
3173 } |
|
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|
3174 } |
|
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|
3175 else |
|
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|
3176 x = PyOS_strtol((char *)s, (char **)&end, 0); |
|
06145fbc7ab9
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|
3177 if (*end == '\0') { |
|
06145fbc7ab9
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|
3178 if (errno != 0) |
|
06145fbc7ab9
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parents:
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changeset
|
3179 return PyLong_FromString((char *)s, (char **)0, 0); |
|
44099
f324631462a2
Cleanup: Replaced most PyInt_ aliases with PyLong_ and disabled the aliases in intobject.h
Christian Heimes <christian@cheimes.de>
parents:
44025
diff
changeset
|
3180 return PyLong_FromLong(x); |
|
41554
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|
3181 } |
|
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|
3182 /* XXX Huge floats may silently fail */ |
| 35742 | 3183 #ifndef WITHOUT_COMPLEX |
|
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|
3184 if (imflag) { |
|
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|
3185 compl.real = 0.; |
|
53707
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|
3186 compl.imag = PyOS_string_to_double(s, (char **)&end, NULL); |
|
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|
3187 if (compl.imag == -1.0 && PyErr_Occurred()) |
|
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|
3188 return NULL; |
|
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|
3189 return PyComplex_FromCComplex(compl); |
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3190 } |
|
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3191 else |
| 35742 | 3192 #endif |
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3193 { |
|
53707
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|
3194 dx = PyOS_string_to_double(s, NULL, NULL); |
|
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|
3195 if (dx == -1.0 && PyErr_Occurred()) |
|
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|
3196 return NULL; |
|
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3197 return PyFloat_FromDouble(dx); |
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3198 } |
| 35742 | 3199 } |
| 3200 | |
| 3201 static PyObject * | |
|
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|
3202 decode_utf8(struct compiling *c, const char **sPtr, const char *end, char* encoding) |
| 35742 | 3203 { |
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3204 PyObject *u, *v; |
|
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3205 char *s, *t; |
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3206 t = s = (char *)*sPtr; |
|
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3207 /* while (s < end && *s != '\\') s++; */ /* inefficient for u".." */ |
|
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3208 while (s < end && (*s & 0x80)) s++; |
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3209 *sPtr = s; |
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3210 u = PyUnicode_DecodeUTF8(t, s - t, NULL); |
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3211 if (u == NULL) |
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3212 return NULL; |
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3213 v = PyUnicode_AsEncodedString(u, encoding, NULL); |
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3214 Py_DECREF(u); |
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3215 return v; |
| 35742 | 3216 } |
| 3217 | |
| 3218 static PyObject * | |
|
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|
3219 decode_unicode(struct compiling *c, const char *s, size_t len, int rawmode, const char *encoding) |
| 35742 | 3220 { |
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3221 PyObject *v, *u; |
|
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3222 char *buf; |
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3223 char *p; |
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3224 const char *end; |
|
43819
068655054b0d
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3225 |
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3226 if (encoding == NULL) { |
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3227 buf = (char *)s; |
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3228 u = NULL; |
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3229 } else { |
|
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3230 /* check for integer overflow */ |
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3231 if (len > PY_SIZE_MAX / 6) |
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3232 return NULL; |
|
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3233 /* "ä" (2 bytes) may become "\U000000E4" (10 bytes), or 1:5 |
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3234 "\ä" (3 bytes) may become "\u005c\U000000E4" (16 bytes), or ~1:6 */ |
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3235 u = PyBytes_FromStringAndSize((char *)NULL, len * 6); |
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3236 if (u == NULL) |
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3237 return NULL; |
|
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3238 p = buf = PyBytes_AsString(u); |
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3239 end = s + len; |
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3240 while (s < end) { |
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3241 if (*s == '\\') { |
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3242 *p++ = *s++; |
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|
3243 if (*s & 0x80) { |
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|
3244 strcpy(p, "u005c"); |
|
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|
3245 p += 5; |
|
40450
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|
3246 } |
|
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3247 } |
|
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|
3248 if (*s & 0x80) { /* XXX inefficient */ |
|
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|
3249 PyObject *w; |
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|
3250 char *r; |
|
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|
3251 Py_ssize_t rn, i; |
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|
3252 w = decode_utf8(c, &s, end, "utf-32-be"); |
|
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3253 if (w == NULL) { |
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|
3254 Py_DECREF(u); |
|
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|
3255 return NULL; |
|
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|
3256 } |
|
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|
3257 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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|
3258 rn = Py_SIZE(w); |
|
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|
3259 assert(rn % 4 == 0); |
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|
3260 for (i = 0; i < rn; i += 4) { |
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|
3261 sprintf(p, "\\U%02x%02x%02x%02x", |
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|
3262 r[i + 0] & 0xFF, |
|
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|
3263 r[i + 1] & 0xFF, |
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|
3264 r[i + 2] & 0xFF, |
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|
3265 r[i + 3] & 0xFF); |
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|
3266 p += 10; |
|
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3267 } |
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|
3268 /* Should be impossible to overflow */ |
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|
3269 assert(p - buf <= Py_SIZE(u)); |
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|
3270 Py_DECREF(w); |
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3271 } else { |
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3272 *p++ = *s++; |
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|
3273 } |
|
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|
3274 } |
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3275 len = p - buf; |
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|
3276 s = buf; |
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3277 } |
|
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|
3278 if (rawmode) |
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3279 v = PyUnicode_DecodeRawUnicodeEscape(s, len, NULL); |
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3280 else |
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3281 v = PyUnicode_DecodeUnicodeEscape(s, len, NULL); |
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|
3282 Py_XDECREF(u); |
|
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|
3283 return v; |
| 35742 | 3284 } |
| 3285 | |
| 3286 /* s is a Python string literal, including the bracketing quote characters, | |
|
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|
3287 * and r &/or b prefixes (if any), and embedded escape sequences (if any). |
| 35742 | 3288 * parsestr parses it, and returns the decoded Python string object. |
| 3289 */ | |
| 3290 static PyObject * | |
|
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3291 parsestr(struct compiling *c, const node *n, int *bytesmode) |
| 35742 | 3292 { |
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3293 size_t len; |
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3294 const char *s = STR(n); |
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3295 int quote = Py_CHARMASK(*s); |
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3296 int rawmode = 0; |
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3297 int need_encoding; |
|
43777
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Merging the py3k-pep3137 branch back into the py3k branch.
Guido van Rossum <guido@python.org>
parents:
43734
diff
changeset
|
3298 if (isalpha(quote)) { |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3299 if (quote == 'b' || quote == 'B') { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3300 quote = *++s; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3301 *bytesmode = 1; |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
56955
diff
changeset
|
3302 } |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3303 if (quote == 'r' || quote == 'R') { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3304 quote = *++s; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3305 rawmode = 1; |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3306 } |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3307 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3308 if (quote != '\'' && quote != '\"') { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3309 PyErr_BadInternalCall(); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3310 return NULL; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3311 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3312 s++; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3313 len = strlen(s); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3314 if (len > INT_MAX) { |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
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changeset
|
3315 PyErr_SetString(PyExc_OverflowError, |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3316 "string to parse is too long"); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
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|
3317 return NULL; |
|
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Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3318 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3319 if (s[--len] != quote) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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changeset
|
3320 PyErr_BadInternalCall(); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
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|
3321 return NULL; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3322 } |
|
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Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3323 if (len >= 4 && s[0] == quote && s[1] == quote) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3324 s += 2; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3325 len -= 2; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3326 if (s[--len] != quote || s[--len] != quote) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3327 PyErr_BadInternalCall(); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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|
3328 return NULL; |
| 40894 | 3329 } |
|
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Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3330 } |
|
46306
b10292eafb07
Reverted r62128 on Guido's orders
Benjamin Peterson <benjamin@python.org>
parents:
46272
diff
changeset
|
3331 if (!*bytesmode && !rawmode) { |
|
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:
46306
diff
changeset
|
3332 return decode_unicode(c, s, len, rawmode, c->c_encoding); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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changeset
|
3333 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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changeset
|
3334 if (*bytesmode) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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changeset
|
3335 /* Disallow non-ascii characters (but not escapes) */ |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3336 const char *c; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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changeset
|
3337 for (c = s; *c; c++) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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changeset
|
3338 if (Py_CHARMASK(*c) >= 0x80) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3339 ast_error(n, "bytes can only contain ASCII " |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3340 "literal characters."); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3341 return NULL; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3342 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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parents:
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diff
changeset
|
3343 } |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3344 } |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents:
45931
diff
changeset
|
3345 need_encoding = (!*bytesmode && c->c_encoding != NULL && |
|
49539
481ad3d9ffd1
Latin-1 source code was not being properly decoded when passed through
Brett Cannon <bcannon@gmail.com>
parents:
48777
diff
changeset
|
3346 strcmp(c->c_encoding, "utf-8") != 0); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3347 if (rawmode || strchr(s, '\\') == NULL) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3348 if (need_encoding) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3349 PyObject *v, *u = PyUnicode_DecodeUTF8(s, len, NULL); |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3350 if (u == NULL || !*bytesmode) |
|
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3351 return u; |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents:
45931
diff
changeset
|
3352 v = PyUnicode_AsEncodedString(u, c->c_encoding, NULL); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3353 Py_DECREF(u); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3354 return v; |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3355 } else if (*bytesmode) { |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
3356 return PyBytes_FromStringAndSize(s, len); |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents:
45931
diff
changeset
|
3357 } else if (strcmp(c->c_encoding, "utf-8") == 0) { |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3358 return PyUnicode_FromStringAndSize(s, len); |
|
61467
f197407bdba2
Recorded merge of revisions 81032 via svnmerge from
Antoine Pitrou <solipsis@pitrou.net>
parents:
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diff
changeset
|
3359 } else { |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3360 return PyUnicode_DecodeLatin1(s, len, NULL); |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3361 } |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3362 } |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
3363 return PyBytes_DecodeEscape(s, len, NULL, 1, |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
Christian Heimes <christian@cheimes.de>
parents:
45931
diff
changeset
|
3364 need_encoding ? c->c_encoding : NULL); |
| 35742 | 3365 } |
| 3366 | |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3367 /* Build a Python string object out of a STRING+ atom. This takes care of |
| 35742 | 3368 * compile-time literal catenation, calling parsestr() on each piece, and |
| 3369 * pasting the intermediate results together. | |
| 3370 */ | |
| 3371 static PyObject * | |
| 40894 | 3372 parsestrplus(struct compiling *c, const node *n, int *bytesmode) |
| 35742 | 3373 { |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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parents:
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diff
changeset
|
3374 PyObject *v; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3375 int i; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3376 REQ(CHILD(n, 0), STRING); |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
Christian Heimes <christian@cheimes.de>
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changeset
|
3377 v = parsestr(c, CHILD(n, 0), bytesmode); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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changeset
|
3378 if (v != NULL) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
parents:
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diff
changeset
|
3379 /* String literal concatenation */ |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3380 for (i = 1; i < NCH(n); i++) { |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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changeset
|
3381 PyObject *s; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3382 int subbm = 0; |
|
46120
78504d604b44
Merged revisions 61952-61953 via svnmerge from
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diff
changeset
|
3383 s = parsestr(c, CHILD(n, i), &subbm); |
|
41554
06145fbc7ab9
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changeset
|
3384 if (s == NULL) |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3385 goto onError; |
|
06145fbc7ab9
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Guido van Rossum <guido@python.org>
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diff
changeset
|
3386 if (*bytesmode != subbm) { |
|
43819
068655054b0d
Minimal change that disables (AFAICT) the interpolation of \u and \U inside
Guido van Rossum <guido@python.org>
parents:
43777
diff
changeset
|
3387 ast_error(n, "cannot mix bytes and nonbytes literals"); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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changeset
|
3388 goto onError; |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
Guido van Rossum <guido@python.org>
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diff
changeset
|
3389 } |
|
47301
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
3390 if (PyBytes_Check(v) && PyBytes_Check(s)) { |
|
23ab586c427a
Renamed PyString to PyBytes
Christian Heimes <christian@cheimes.de>
parents:
46664
diff
changeset
|
3391 PyBytes_ConcatAndDel(&v, s); |
|
41554
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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changeset
|
3392 if (v == NULL) |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3393 goto onError; |
|
06145fbc7ab9
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diff
changeset
|
3394 } |
|
06145fbc7ab9
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changeset
|
3395 else { |
|
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changeset
|
3396 PyObject *temp = PyUnicode_Concat(v, s); |
|
06145fbc7ab9
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changeset
|
3397 Py_DECREF(s); |
|
06145fbc7ab9
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changeset
|
3398 Py_DECREF(v); |
|
06145fbc7ab9
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changeset
|
3399 v = temp; |
|
06145fbc7ab9
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changeset
|
3400 if (v == NULL) |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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changeset
|
3401 goto onError; |
|
06145fbc7ab9
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Guido van Rossum <guido@python.org>
parents:
41509
diff
changeset
|
3402 } |
|
40450
cc992d75d5b3
Four months of trunk changes (including a few releases...)
Thomas Wouters <thomas@python.org>
parents:
40215
diff
changeset
|
3403 } |
|
41554
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changeset
|
3404 } |
|
06145fbc7ab9
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diff
changeset
|
3405 return v; |
| 35742 | 3406 |
|
41554
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changeset
|
3407 onError: |
|
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changeset
|
3408 Py_XDECREF(v); |
|
06145fbc7ab9
Merged revisions 53952-54987 via svnmerge from
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diff
changeset
|
3409 return NULL; |
| 35742 | 3410 } |