Synopsis - Cross-Reference

 1#
 2# Copyright (C) 2005 Stefan Seefeld
 3# All rights reserved.
 4# Licensed to the public under the terms of the GNU LGPL (>= 2),
 5# see the file COPYING for details.
 6#
 7
 8from Synopsis import ASG
 9from Synopsis.Processor import Processor
10
11class Transformer(Processor, ASG.Visitor):
12    """A class that creates a new ASG from an old one. This is a helper base for
13    more specialized classes that manipulate the ASG based on
14    the comments in the nodes"""
15
16    def __init__(self, **kwds):
17        """Constructor"""
18
19        Processor.__init__(self, **kwds)
20        self.__scopes = []
21        self.__current = []
22
23    def process(self, ir, **kwds):
24
25        self.set_parameters(kwds)
26        self.ir = self.merge_input(ir)
27
28        for decl in ir.asg.declarations:
29            decl.accept(self)
30
31        self.finalize()
32        return self.output_and_return_ir()
33
34    def finalize(self):
35        """replace the ASG with the newly created one"""
36
37        self.ir.asg.declarations[:] = self.__current
38
39    def push(self):
40        """Pushes the current scope onto the stack and starts a new one"""
41
42        self.__scopes.append(self.__current)
43        self.__current = []
44
45    def pop(self, decl):
46        """Pops the current scope from the stack, and appends the given
47        declaration to it"""
48
49        self.__current = self.__scopes.pop()
50        self.__current.append(decl)
51
52    def add(self, decl):
53        """Adds the given decl to the current scope"""
54
55        self.__current.append(decl)
56
57    def current_scope(self):
58        """Returns the current scope: a list of declarations"""
59
60        return self.__current
61
62    def visit_builtin(self, decl):
63
64        self.visit_declaration(decl)
65

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