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File: Synopsis/Linker/AccessRestrictor.py
1| # $Id: AccessRestrictor.py,v 1.1 2002/08/23 04:37:26 chalky Exp $
2| #
3| # This file is a part of Synopsis.
4| # Copyright (C) 2000, 2001 Stefan Seefeld
5| # Copyright (C) 2000, 2001 Stephen Davies
6| #
7| # Synopsis is free software; you can redistribute it and/or modify it
8| # under the terms of the GNU General Public License as published by
9| # the Free Software Foundation; either version 2 of the License, or
10| # (at your option) any later version.
11| #
12| # This program is distributed in the hope that it will be useful,
13| # but WITHOUT ANY WARRANTY; without even the implied warranty of
14| # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15| # General Public License for more details.
16| #
17| # You should have received a copy of the GNU General Public License
18| # along with this program; if not, write to the Free Software
19| # Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20| # 02111-1307, USA.
21| #
22| # $Log: AccessRestrictor.py,v $
23| # Revision 1.1 2002/08/23 04:37:26 chalky
24| # Huge refactoring of Linker to make it modular, and use a config system similar
25| # to the HTML package
26| #
27|
28| import string
29|
30| from Synopsis.Core import AST, Type, Util
31|
32| from Linker import config, Operation
33|
34| class AccessRestrictor(AST.Visitor):
35| """This class processes declarations, and removes those that need greated
36| access than the maximum passed to the constructor"""
37| def __init__(self):
38| self.__max = config.max_access
39| self.__scopestack = []
40| self.__currscope = []
41| def execute(self, ast):
42| if self.__max is None: return
43| declarations = ast.declarations()
44| for decl in declarations:
45| decl.accept(self)
46| declarations[:] = self.__currscope
47| def push(self):
48| self.__scopestack.append(self.__currscope)
49| self.__currscope = []
50| def pop(self, decl):
51| self.__currscope = self.__scopestack.pop()
52| self.__currscope.append(decl)
53| def add(self, decl):
54| self.__currscope.append(decl)
55| def currscope(self): return self.__currscope
56|
57| def visitDeclaration(self, decl):
58| if decl.accessibility() > self.__max: return
59| self.add(decl)
60| def visitScope(self, scope):
61| if scope.accessibility() > self.__max: return
62| self.push()
63| for decl in scope.declarations():
64| decl.accept(self)
65| scope.declarations()[:] = self.__currscope
66| self.pop(scope)
67|
68| linkerOperation = AccessRestrictor