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137 lines
5.0 KiB
Python
137 lines
5.0 KiB
Python
# This program is free software; you can redistribute it and/or modify it under
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# the terms of the GNU Lesser General Public License as published by the Free Software
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# Foundation; either version 2 of the License, or (at your option) any later
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# version.
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#
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# This program is distributed in the hope that it will be useful, but WITHOUT
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# ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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# FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along with
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# this program; if not, write to the Free Software Foundation, Inc.,
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# 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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# copyright 2003-2010 LOGILAB S.A. (Paris, FRANCE), all rights reserved.
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# contact http://www.logilab.fr/ -- mailto:contact@logilab.fr
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# copyright 2003-2010 Sylvain Thenault, all rights reserved.
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# contact mailto:thenault@gmail.com
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#
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# This file is part of logilab-astng.
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#
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# logilab-astng is free software: you can redistribute it and/or modify it
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# under the terms of the GNU Lesser General Public License as published by the
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# Free Software Foundation, either version 2.1 of the License, or (at your
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# option) any later version.
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#
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# logilab-astng is distributed in the hope that it will be useful, but
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# WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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# FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
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# for more details.
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#
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# You should have received a copy of the GNU Lesser General Public License along
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# with logilab-astng. If not, see <http://www.gnu.org/licenses/>.
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"""This module contains some mixins for the different nodes.
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"""
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from logilab.astng.exceptions import (ASTNGBuildingException, InferenceError,
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NotFoundError)
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class BlockRangeMixIn(object):
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"""override block range """
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def set_line_info(self, lastchild):
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self.fromlineno = self.lineno
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self.tolineno = lastchild.tolineno
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self.blockstart_tolineno = self._blockstart_toline()
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def _elsed_block_range(self, lineno, orelse, last=None):
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"""handle block line numbers range for try/finally, for, if and while
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statements
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"""
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if lineno == self.fromlineno:
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return lineno, lineno
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if orelse:
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if lineno >= orelse[0].fromlineno:
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return lineno, orelse[-1].tolineno
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return lineno, orelse[0].fromlineno - 1
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return lineno, last or self.tolineno
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class FilterStmtsMixin(object):
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"""Mixin for statement filtering and assignment type"""
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def _get_filtered_stmts(self, _, node, _stmts, mystmt):
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"""method used in _filter_stmts to get statemtents and trigger break"""
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if self.statement() is mystmt:
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# original node's statement is the assignment, only keep
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# current node (gen exp, list comp)
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return [node], True
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return _stmts, False
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def ass_type(self):
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return self
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class AssignTypeMixin(object):
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def ass_type(self):
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return self
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def _get_filtered_stmts(self, lookup_node, node, _stmts, mystmt):
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"""method used in filter_stmts"""
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if self is mystmt:
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return _stmts, True
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if self.statement() is mystmt:
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# original node's statement is the assignment, only keep
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# current node (gen exp, list comp)
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return [node], True
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return _stmts, False
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class ParentAssignTypeMixin(AssignTypeMixin):
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def ass_type(self):
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return self.parent.ass_type()
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class FromImportMixIn(FilterStmtsMixin):
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"""MixIn for From and Import Nodes"""
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def _infer_name(self, frame, name):
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return name
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def do_import_module(self, modname):
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"""return the ast for a module whose name is <modname> imported by <self>
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"""
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# handle special case where we are on a package node importing a module
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# using the same name as the package, which may end in an infinite loop
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# on relative imports
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# XXX: no more needed ?
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mymodule = self.root()
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level = getattr(self, 'level', None) # Import as no level
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# XXX we should investigate deeper if we really want to check
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# importing itself: modname and mymodule.name be relative or absolute
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if mymodule.relative_to_absolute_name(modname, level) == mymodule.name:
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# FIXME: we used to raise InferenceError here, but why ?
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return mymodule
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try:
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return mymodule.import_module(modname, level=level)
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except ASTNGBuildingException:
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raise InferenceError(modname)
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except SyntaxError, ex:
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raise InferenceError(str(ex))
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def real_name(self, asname):
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"""get name from 'as' name"""
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for name, _asname in self.names:
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if name == '*':
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return asname
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if not _asname:
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name = name.split('.', 1)[0]
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_asname = name
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if asname == _asname:
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return name
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raise NotFoundError(asname)
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