TransitionDeclAST.py revision 6778:b3f2dfbe8006
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. 4# 5# Redistribution and use in source and binary forms, with or without 6# modification, are permitted provided that the following conditions are 7# met: redistributions of source code must retain the above copyright 8# notice, this list of conditions and the following disclaimer; 9# redistributions in binary form must reproduce the above copyright 10# notice, this list of conditions and the following disclaimer in the 11# documentation and/or other materials provided with the distribution; 12# neither the name of the copyright holders nor the names of its 13# contributors may be used to endorse or promote products derived from 14# this software without specific prior written permission. 15# 16# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 17# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 18# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR 19# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT 20# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, 21# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT 22# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 23# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 24# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 25# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE 26# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 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 action in self.actions: 50 if action not in machine.actions: 51 self.error("Invalid action: %s is not part of machine: %s" % \ 52 (action, machine)) 53 54 for state in self.states: 55 if state not in machine.states: 56 self.error("Invalid state: %s is not part of machine: %s" % \ 57 (state, machine)) 58 next_state = self.next_state or state 59 for event in self.events: 60 if event not in machine.events: 61 self.error("Invalid event: %s is not part of machine: %s" % \ 62 (event, machine)) 63 t = Transition(self.symtab, machine, state, event, next_state, 64 self.actions, self.location, self.pairs) 65 machine.addTransition(t) 66