1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
#
# Copyright (C) 2005 Stefan Seefeld
# All rights reserved.
# Licensed to the public under the terms of the GNU LGPL (>= 2),
# see the file COPYING for details.
#
from Synopsis import AST
from Processor import Processor
class Transformer(Processor):
"""A class that creates a new AST from an old one. This is a helper base for
more specialized classes that manipulate the AST based on
the comments in the nodes"""
def __init__(self, **kwds):
"""Constructor"""
Processor.__init__(self, **kwds)
self.__scopestack = []
self.__currscope = []
def finalize(self):
"""replace the AST with the newly created one"""
self.ast.declarations()[:] = self.__currscope
def push(self):
"""Pushes the current scope onto the stack and starts a new one"""
self.__scopestack.append(self.__currscope)
self.__currscope = []
def pop(self, decl):
"""Pops the current scope from the stack, and appends the given
declaration to it"""
self.__currscope = self.__scopestack.pop()
self.__currscope.append(decl)
def add(self, decl):
"""Adds the given decl to the current scope"""
self.__currscope.append(decl)
def currscope(self):
"""Returns the current scope: a list of declarations"""
return self.__currscope
|
