TransitionDeclAST.py revision 6657:ef5fae93a3b2 
1# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
2# Copyright (c) 2009 The Hewlett-Packard Development Company
3# All rights reserved.
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14# this software without specific prior written permission.
15#
16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27
28from slicc.ast.DeclAST import DeclAST
29from slicc.symbols import Transition
30
31class TransitionDeclAST(DeclAST):
32    def __init__(self, slicc, states, events, next_state, pairs, actions):
33        super(TransitionDeclAST, self).__init__(slicc, pairs)
34
35        self.states = states
36        self.events = events
37        self.next_state = next_state
38        self.actions = actions
39
40    def __repr__(self):
41        return "[TransitionDecl: ]"
42
43    def generate(self):
44        machine = self.symtab.state_machine
45
46        if machine is None:
47            self.error("Transition declaration not part of a machine.")
48
49        for state in self.states:
50            next_state = self.next_state or state
51            for event in self.events:
52                t = Transition(self.symtab, machine, state, event, next_state,
53                               self.actions, self.location, self.pairs)
54                machine.addTransition(t)
55