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| 1 # copyright 2003-2011 LOGILAB S.A. (Paris, FRANCE), all rights reserved. | |
| 2 # contact http://www.logilab.fr/ -- mailto:contact@logilab.fr | |
| 3 # copyright 2003-2010 Sylvain Thenault, all rights reserved. | |
| 4 # contact mailto:thenault@gmail.com | |
| 5 # | |
| 6 # This file is part of logilab-astng. | |
| 7 # | |
| 8 # logilab-astng is free software: you can redistribute it and/or modify it | |
| 9 # under the terms of the GNU Lesser General Public License as published by the | |
| 10 # Free Software Foundation, either version 2.1 of the License, or (at your | |
| 11 # option) any later version. | |
| 12 # | |
| 13 # logilab-astng is distributed in the hope that it will be useful, but | |
| 14 # WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or | |
| 15 # FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License | |
| 16 # for more details. | |
| 17 # | |
| 18 # You should have received a copy of the GNU Lesser General Public License along | |
| 19 # with logilab-astng. If not, see <http://www.gnu.org/licenses/>. | |
| 20 """This module renders ASTNG nodes to string representation. | |
| 21 | |
| 22 It will probably not work on bare _ast trees. | |
| 23 """ | |
| 24 import sys | |
| 25 | |
| 26 | |
| 27 INDENT = ' ' # 4 spaces ; keep indentation variable | |
| 28 | |
| 29 | |
| 30 def _import_string(names): | |
| 31 """return a list of (name, asname) formatted as a string""" | |
| 32 _names = [] | |
| 33 for name, asname in names: | |
| 34 if asname is not None: | |
| 35 _names.append('%s as %s' % (name, asname)) | |
| 36 else: | |
| 37 _names.append(name) | |
| 38 return ', '.join(_names) | |
| 39 | |
| 40 | |
| 41 class AsStringVisitor(object): | |
| 42 """Visitor to render an ASTNG node as string """ | |
| 43 | |
| 44 def __call__(self, node): | |
| 45 """Makes this visitor behave as a simple function""" | |
| 46 return node.accept(self) | |
| 47 | |
| 48 def _stmt_list(self, stmts): | |
| 49 """return a list of nodes to string""" | |
| 50 stmts = '\n'.join([nstr for nstr in [n.accept(self) for n in stmts] if n
str]) | |
| 51 return INDENT + stmts.replace('\n', '\n'+INDENT) | |
| 52 | |
| 53 | |
| 54 ## visit_<node> methods ########################################### | |
| 55 | |
| 56 def visit_arguments(self, node): | |
| 57 """return an astng.Function node as string""" | |
| 58 return node.format_args() | |
| 59 | |
| 60 def visit_assattr(self, node): | |
| 61 """return an astng.AssAttr node as string""" | |
| 62 return self.visit_getattr(node) | |
| 63 | |
| 64 def visit_assert(self, node): | |
| 65 """return an astng.Assert node as string""" | |
| 66 if node.fail: | |
| 67 return 'assert %s, %s' % (node.test.accept(self), | |
| 68 node.fail.accept(self)) | |
| 69 return 'assert %s' % node.test.accept(self) | |
| 70 | |
| 71 def visit_assname(self, node): | |
| 72 """return an astng.AssName node as string""" | |
| 73 return node.name | |
| 74 | |
| 75 def visit_assign(self, node): | |
| 76 """return an astng.Assign node as string""" | |
| 77 lhs = ' = '.join([n.accept(self) for n in node.targets]) | |
| 78 return '%s = %s' % (lhs, node.value.accept(self)) | |
| 79 | |
| 80 def visit_augassign(self, node): | |
| 81 """return an astng.AugAssign node as string""" | |
| 82 return '%s %s %s' % (node.target.accept(self), node.op, node.value.accep
t(self)) | |
| 83 | |
| 84 def visit_backquote(self, node): | |
| 85 """return an astng.Backquote node as string""" | |
| 86 return '`%s`' % node.value.accept(self) | |
| 87 | |
| 88 def visit_binop(self, node): | |
| 89 """return an astng.BinOp node as string""" | |
| 90 return '(%s) %s (%s)' % (node.left.accept(self), node.op, node.right.acc
ept(self)) | |
| 91 | |
| 92 def visit_boolop(self, node): | |
| 93 """return an astng.BoolOp node as string""" | |
| 94 return (' %s ' % node.op).join(['(%s)' % n.accept(self) | |
| 95 for n in node.values]) | |
| 96 | |
| 97 def visit_break(self, node): | |
| 98 """return an astng.Break node as string""" | |
| 99 return 'break' | |
| 100 | |
| 101 def visit_callfunc(self, node): | |
| 102 """return an astng.CallFunc node as string""" | |
| 103 expr_str = node.func.accept(self) | |
| 104 args = [arg.accept(self) for arg in node.args] | |
| 105 if node.starargs: | |
| 106 args.append( '*' + node.starargs.accept(self)) | |
| 107 if node.kwargs: | |
| 108 args.append( '**' + node.kwargs.accept(self)) | |
| 109 return '%s(%s)' % (expr_str, ', '.join(args)) | |
| 110 | |
| 111 def visit_class(self, node): | |
| 112 """return an astng.Class node as string""" | |
| 113 decorate = node.decorators and node.decorators.accept(self) or '' | |
| 114 bases = ', '.join([n.accept(self) for n in node.bases]) | |
| 115 bases = bases and '(%s)' % bases or '' | |
| 116 docs = node.doc and '\n%s"""%s"""' % (INDENT, node.doc) or '' | |
| 117 return '\n\n%sclass %s%s:%s\n%s\n' % (decorate, node.name, bases, docs, | |
| 118 self._stmt_list( node.body)) | |
| 119 | |
| 120 def visit_compare(self, node): | |
| 121 """return an astng.Compare node as string""" | |
| 122 rhs_str = ' '.join(['%s %s' % (op, expr.accept(self)) | |
| 123 for op, expr in node.ops]) | |
| 124 return '%s %s' % (node.left.accept(self), rhs_str) | |
| 125 | |
| 126 def visit_comprehension(self, node): | |
| 127 """return an astng.Comprehension node as string""" | |
| 128 ifs = ''.join([ ' if %s' % n.accept(self) for n in node.ifs]) | |
| 129 return 'for %s in %s%s' % (node.target.accept(self), | |
| 130 node.iter.accept(self), ifs ) | |
| 131 | |
| 132 def visit_const(self, node): | |
| 133 """return an astng.Const node as string""" | |
| 134 return repr(node.value) | |
| 135 | |
| 136 def visit_continue(self, node): | |
| 137 """return an astng.Continue node as string""" | |
| 138 return 'continue' | |
| 139 | |
| 140 def visit_delete(self, node): # XXX check if correct | |
| 141 """return an astng.Delete node as string""" | |
| 142 return 'del %s' % ', '.join([child.accept(self) | |
| 143 for child in node.targets]) | |
| 144 | |
| 145 def visit_delattr(self, node): | |
| 146 """return an astng.DelAttr node as string""" | |
| 147 return self.visit_getattr(node) | |
| 148 | |
| 149 def visit_delname(self, node): | |
| 150 """return an astng.DelName node as string""" | |
| 151 return node.name | |
| 152 | |
| 153 def visit_decorators(self, node): | |
| 154 """return an astng.Decorators node as string""" | |
| 155 return '@%s\n' % '\n@'.join([item.accept(self) for item in node.nodes]) | |
| 156 | |
| 157 def visit_dict(self, node): | |
| 158 """return an astng.Dict node as string""" | |
| 159 return '{%s}' % ', '.join(['%s: %s' % (key.accept(self), | |
| 160 value.accept(self)) for key, value in node.items]) | |
| 161 | |
| 162 def visit_dictcomp(self, node): | |
| 163 """return an astng.DictComp node as string""" | |
| 164 return '{%s: %s %s}' % (node.key.accept(self), node.value.accept(self), | |
| 165 ' '.join([n.accept(self) for n in node.generators])) | |
| 166 | |
| 167 def visit_discard(self, node): | |
| 168 """return an astng.Discard node as string""" | |
| 169 return node.value.accept(self) | |
| 170 | |
| 171 def visit_emptynode(self, node): | |
| 172 """dummy method for visiting an Empty node""" | |
| 173 return '' | |
| 174 | |
| 175 def visit_excepthandler(self, node): | |
| 176 if node.type: | |
| 177 if node.name: | |
| 178 excs = 'except %s, %s' % (node.type.accept(self), | |
| 179 node.name.accept(self)) | |
| 180 else: | |
| 181 excs = 'except %s' % node.type.accept(self) | |
| 182 else: | |
| 183 excs = 'except' | |
| 184 return '%s:\n%s' % (excs, self._stmt_list(node.body)) | |
| 185 | |
| 186 def visit_ellipsis(self, node): | |
| 187 """return an astng.Ellipsis node as string""" | |
| 188 return '...' | |
| 189 | |
| 190 def visit_empty(self, node): | |
| 191 """return an Empty node as string""" | |
| 192 return '' | |
| 193 | |
| 194 def visit_exec(self, node): | |
| 195 """return an astng.Exec node as string""" | |
| 196 if node.locals: | |
| 197 return 'exec %s in %s, %s' % (node.expr.accept(self), | |
| 198 node.locals.accept(self), | |
| 199 node.globals.accept(self)) | |
| 200 if node.globals: | |
| 201 return 'exec %s in %s' % (node.expr.accept(self), | |
| 202 node.globals.accept(self)) | |
| 203 return 'exec %s' % node.expr.accept(self) | |
| 204 | |
| 205 def visit_extslice(self, node): | |
| 206 """return an astng.ExtSlice node as string""" | |
| 207 return ','.join( [dim.accept(self) for dim in node.dims] ) | |
| 208 | |
| 209 def visit_for(self, node): | |
| 210 """return an astng.For node as string""" | |
| 211 fors = 'for %s in %s:\n%s' % (node.target.accept(self), | |
| 212 node.iter.accept(self), | |
| 213 self._stmt_list( node.body)) | |
| 214 if node.orelse: | |
| 215 fors = '%s\nelse:\n%s' % (fors, self._stmt_list(node.orelse)) | |
| 216 return fors | |
| 217 | |
| 218 def visit_from(self, node): | |
| 219 """return an astng.From node as string""" | |
| 220 return 'from %s import %s' % ('.' * (node.level or 0) + node.modname, | |
| 221 _import_string(node.names)) | |
| 222 | |
| 223 def visit_function(self, node): | |
| 224 """return an astng.Function node as string""" | |
| 225 decorate = node.decorators and node.decorators.accept(self) or '' | |
| 226 docs = node.doc and '\n%s"""%s"""' % (INDENT, node.doc) or '' | |
| 227 return '\n%sdef %s(%s):%s\n%s' % (decorate, node.name, node.args.accept(
self), | |
| 228 docs, self._stmt_list(node.body)) | |
| 229 | |
| 230 def visit_genexpr(self, node): | |
| 231 """return an astng.GenExpr node as string""" | |
| 232 return '(%s %s)' % (node.elt.accept(self), ' '.join([n.accept(self) | |
| 233 for n in node.generators])) | |
| 234 | |
| 235 def visit_getattr(self, node): | |
| 236 """return an astng.Getattr node as string""" | |
| 237 return '%s.%s' % (node.expr.accept(self), node.attrname) | |
| 238 | |
| 239 def visit_global(self, node): | |
| 240 """return an astng.Global node as string""" | |
| 241 return 'global %s' % ', '.join(node.names) | |
| 242 | |
| 243 def visit_if(self, node): | |
| 244 """return an astng.If node as string""" | |
| 245 ifs = ['if %s:\n%s' % (node.test.accept(self), self._stmt_list(node.body
))] | |
| 246 if node.orelse:# XXX use elif ??? | |
| 247 ifs.append('else:\n%s' % self._stmt_list(node.orelse)) | |
| 248 return '\n'.join(ifs) | |
| 249 | |
| 250 def visit_ifexp(self, node): | |
| 251 """return an astng.IfExp node as string""" | |
| 252 return '%s if %s else %s' % (node.body.accept(self), | |
| 253 node.test.accept(self), node.orelse.accept(self)) | |
| 254 | |
| 255 def visit_import(self, node): | |
| 256 """return an astng.Import node as string""" | |
| 257 return 'import %s' % _import_string(node.names) | |
| 258 | |
| 259 def visit_keyword(self, node): | |
| 260 """return an astng.Keyword node as string""" | |
| 261 return '%s=%s' % (node.arg, node.value.accept(self)) | |
| 262 | |
| 263 def visit_lambda(self, node): | |
| 264 """return an astng.Lambda node as string""" | |
| 265 return 'lambda %s: %s' % (node.args.accept(self), node.body.accept(self)
) | |
| 266 | |
| 267 def visit_list(self, node): | |
| 268 """return an astng.List node as string""" | |
| 269 return '[%s]' % ', '.join([child.accept(self) for child in node.elts]) | |
| 270 | |
| 271 def visit_listcomp(self, node): | |
| 272 """return an astng.ListComp node as string""" | |
| 273 return '[%s %s]' % (node.elt.accept(self), ' '.join([n.accept(self) | |
| 274 for n in node.generators])) | |
| 275 | |
| 276 def visit_module(self, node): | |
| 277 """return an astng.Module node as string""" | |
| 278 docs = node.doc and '"""%s"""\n\n' % node.doc or '' | |
| 279 return docs + '\n'.join([n.accept(self) for n in node.body]) + '\n\n' | |
| 280 | |
| 281 def visit_name(self, node): | |
| 282 """return an astng.Name node as string""" | |
| 283 return node.name | |
| 284 | |
| 285 def visit_pass(self, node): | |
| 286 """return an astng.Pass node as string""" | |
| 287 return 'pass' | |
| 288 | |
| 289 def visit_print(self, node): | |
| 290 """return an astng.Print node as string""" | |
| 291 nodes = ', '.join([n.accept(self) for n in node.values]) | |
| 292 if not node.nl: | |
| 293 nodes = '%s,' % nodes | |
| 294 if node.dest: | |
| 295 return 'print >> %s, %s' % (node.dest.accept(self), nodes) | |
| 296 return 'print %s' % nodes | |
| 297 | |
| 298 def visit_raise(self, node): | |
| 299 """return an astng.Raise node as string""" | |
| 300 if node.exc: | |
| 301 if node.inst: | |
| 302 if node.tback: | |
| 303 return 'raise %s, %s, %s' % (node.exc.accept(self), | |
| 304 node.inst.accept(self), | |
| 305 node.tback.accept(self)) | |
| 306 return 'raise %s, %s' % (node.exc.accept(self), | |
| 307 node.inst.accept(self)) | |
| 308 return 'raise %s' % node.exc.accept(self) | |
| 309 return 'raise' | |
| 310 | |
| 311 def visit_return(self, node): | |
| 312 """return an astng.Return node as string""" | |
| 313 if node.value: | |
| 314 return 'return %s' % node.value.accept(self) | |
| 315 else: | |
| 316 return 'return' | |
| 317 | |
| 318 def visit_index(self, node): | |
| 319 """return a astng.Index node as string""" | |
| 320 return node.value.accept(self) | |
| 321 | |
| 322 def visit_set(self, node): | |
| 323 """return an astng.Set node as string""" | |
| 324 return '{%s}' % ', '.join([child.accept(self) for child in node.elts]) | |
| 325 | |
| 326 def visit_setcomp(self, node): | |
| 327 """return an astng.SetComp node as string""" | |
| 328 return '{%s %s}' % (node.elt.accept(self), ' '.join([n.accept(self) | |
| 329 for n in node.generators])) | |
| 330 | |
| 331 def visit_slice(self, node): | |
| 332 """return a astng.Slice node as string""" | |
| 333 lower = node.lower and node.lower.accept(self) or '' | |
| 334 upper = node.upper and node.upper.accept(self) or '' | |
| 335 step = node.step and node.step.accept(self) or '' | |
| 336 if step: | |
| 337 return '%s:%s:%s' % (lower, upper, step) | |
| 338 return '%s:%s' % (lower, upper) | |
| 339 | |
| 340 def visit_subscript(self, node): | |
| 341 """return an astng.Subscript node as string""" | |
| 342 return '%s[%s]' % (node.value.accept(self), node.slice.accept(self)) | |
| 343 | |
| 344 def visit_tryexcept(self, node): | |
| 345 """return an astng.TryExcept node as string""" | |
| 346 trys = ['try:\n%s' % self._stmt_list( node.body)] | |
| 347 for handler in node.handlers: | |
| 348 trys.append(handler.accept(self)) | |
| 349 if node.orelse: | |
| 350 trys.append('else:\n%s' % self._stmt_list(node.orelse)) | |
| 351 return '\n'.join(trys) | |
| 352 | |
| 353 def visit_tryfinally(self, node): | |
| 354 """return an astng.TryFinally node as string""" | |
| 355 return 'try:\n%s\nfinally:\n%s' % (self._stmt_list( node.body), | |
| 356 self._stmt_list(node.finalbody)) | |
| 357 | |
| 358 def visit_tuple(self, node): | |
| 359 """return an astng.Tuple node as string""" | |
| 360 return '(%s)' % ', '.join([child.accept(self) for child in node.elts]) | |
| 361 | |
| 362 def visit_unaryop(self, node): | |
| 363 """return an astng.UnaryOp node as string""" | |
| 364 if node.op == 'not': | |
| 365 operator = 'not ' | |
| 366 else: | |
| 367 operator = node.op | |
| 368 return '%s%s' % (operator, node.operand.accept(self)) | |
| 369 | |
| 370 def visit_while(self, node): | |
| 371 """return an astng.While node as string""" | |
| 372 whiles = 'while %s:\n%s' % (node.test.accept(self), | |
| 373 self._stmt_list(node.body)) | |
| 374 if node.orelse: | |
| 375 whiles = '%s\nelse:\n%s' % (whiles, self._stmt_list(node.orelse)) | |
| 376 return whiles | |
| 377 | |
| 378 def visit_with(self, node): # 'with' without 'as' is possible | |
| 379 """return an astng.With node as string""" | |
| 380 as_var = node.vars and " as (%s)" % (node.vars.accept(self)) or "" | |
| 381 withs = 'with (%s)%s:\n%s' % (node.expr.accept(self), as_var, | |
| 382 self._stmt_list( node.body)) | |
| 383 return withs | |
| 384 | |
| 385 def visit_yield(self, node): | |
| 386 """yield an ast.Yield node as string""" | |
| 387 yi_val = node.value and (" " + node.value.accept(self)) or "" | |
| 388 return 'yield' + yi_val | |
| 389 | |
| 390 | |
| 391 class AsStringVisitor3k(AsStringVisitor): | |
| 392 """AsStringVisitor3k overwrites some AsStringVisitor methods""" | |
| 393 | |
| 394 def visit_excepthandler(self, node): | |
| 395 if node.type: | |
| 396 if node.name: | |
| 397 excs = 'except %s as %s' % (node.type.accept(self), | |
| 398 node.name.accept(self)) | |
| 399 else: | |
| 400 excs = 'except %s' % node.type.accept(self) | |
| 401 else: | |
| 402 excs = 'except' | |
| 403 return '%s:\n%s' % (excs, self._stmt_list(node.body)) | |
| 404 | |
| 405 def visit_nonlocal(self, node): | |
| 406 """return an astng.Nonlocal node as string""" | |
| 407 return 'nonlocal %s' % ', '.join(node.names) | |
| 408 | |
| 409 def visit_raise(self, node): | |
| 410 """return an astng.Raise node as string""" | |
| 411 if node.exc: | |
| 412 if node.cause: | |
| 413 return 'raise %s from %s' % (node.exc.accept(self), | |
| 414 node.cause.accept(self)) | |
| 415 return 'raise %s' % node.exc.accept(self) | |
| 416 return 'raise' | |
| 417 | |
| 418 def visit_starred(self, node): | |
| 419 """return Starred node as string""" | |
| 420 return "*" + node.value.accept(self) | |
| 421 | |
| 422 if sys.version_info >= (3, 0): | |
| 423 AsStringVisitor = AsStringVisitor3k | |
| 424 | |
| 425 # this visitor is stateless, thus it can be reused | |
| 426 as_string = AsStringVisitor() | |
| 427 | |
| OLD | NEW |
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Chromium Code Reviews
Issue 739393004:
Revert "Revert "pylint: upgrade to 1.3.1"" (Closed)
Base URL: svn://svn.chromium.org/chrome/trunk/tools/depot_tools/