Synopsis - Cross-Reference

 1#
 2# Copyright (C) 2000 Stefan Seefeld
 3# Copyright (C) 2000 Stephen Davies
 4# All rights reserved.
 5# Licensed to the public under the terms of the GNU LGPL (>= 2),
 6# see the file COPYING for details.
 7#
 8
 9from Synopsis.Processor import Processor, Parameter
10from Synopsis import ASG
11
12class AccessRestrictor(Processor, ASG.Visitor):
13   """This class processes declarations, and removes those that need greated
14   access than the maximum passed to the constructor"""
15
16   access = Parameter(None, 'specify up to which accessibility level the interface should be documented')
17
18   def __init__(self, **kwds):
19
20      self.set_parameters(kwds)
21      self.__scopestack = []
22      self.__currscope = []
23
24   def process(self, ir, **kwds):
25
26      self.set_parameters(kwds)
27      self.ir = self.merge_input(ir)
28
29      if self.access is not None:
30
31         for decl in ir.asg.declarations:
32            decl.accept(self)
33         ir.asg.declarations = self.__currscope
34
35      return self.output_and_return_ir()
36
37   def push(self):
38
39      self.__scopestack.append(self.__currscope)
40      self.__currscope = []
41
42   def pop(self, decl):
43
44      self.__currscope = self.__scopestack.pop()
45      self.__currscope.append(decl)
46
47   def add(self, decl):
48
49      self.__currscope.append(decl)
50
51   def visit_declaration(self, decl):
52
53      if decl.accessibility > self.access: return
54      self.add(decl)
55
56   def visit_scope(self, scope):
57
58      if scope.accessibility > self.access: return
59      self.push()
60      for decl in scope.declarations:
61         decl.accept(self)
62      scope.declarations = self.__currscope
63      self.pop(scope)
64

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