Moved dynamic scoping stuff out of fix.py and into its own module.

This commit is contained in:
Jeremy Fincher 2005-01-27 07:10:32 +00:00
parent 7fb3b21d94
commit e62585092d
2 changed files with 51 additions and 0 deletions

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@ -29,6 +29,7 @@
import sys import sys
import os.path import os.path
import dynamicScope
installDir = os.path.dirname(sys.modules[__name__].__file__) installDir = os.path.dirname(sys.modules[__name__].__file__)

50
src/dynamicScope.py Normal file
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@ -0,0 +1,50 @@
###
# Copyright (c) 2004-2005, Jeremiah Fincher
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are met:
#
# * Redistributions of source code must retain the above copyright notice,
# this list of conditions, and the following disclaimer.
# * Redistributions in binary form must reproduce the above copyright notice,
# this list of conditions, and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
# * Neither the name of the author of this software nor the name of
# contributors to this software may be used to endorse or promote products
# derived from this software without specific prior written consent.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
###
class DynamicScope(object):
def _getLocals(self, name):
f = sys._getframe().f_back.f_back # _getLocals <- __[gs]etattr__ <- ...
while f:
if name in f.f_locals:
return f.f_locals
f = f.f_back
raise NameError, name
def __getattr__(self, name):
try:
return self._getLocals(name)[name]
except (NameError, KeyError):
return None
def __setattr__(self, name, value):
self._getLocals(name)[name] = value
__builtins__['dynamic'] = DynamicScope()
# vim:set shiftwidth=4 tabstop=8 expandtab textwidth=78: