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# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions are
# met: redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer;
# redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
# contributors may be used to endorse or promote products derived from
# this software without specific prior written permission.
#
# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
from slicc.ast.DeclAST import DeclAST
from slicc.symbols import Transition
class TransitionDeclAST(DeclAST):
def __init__(self, slicc, states, events, next_state, pairs, actions):
super(TransitionDeclAST, self).__init__(slicc, pairs)
self.states = states
self.events = events
self.next_state = next_state
self.actions = actions
def __repr__(self):
return "[TransitionDecl: ]"
def generate(self):
machine = self.symtab.state_machine
if machine is None:
self.error("Transition declaration not part of a machine.")
for action in self.actions:
if action not in machine.actions:
self.error("Invalid action: %s is not part of machine: %s" % \
(action, machine))
for state in self.states:
if state not in machine.states:
self.error("Invalid state: %s is not part of machine: %s" % \
(state, machine))
next_state = self.next_state or state
for event in self.events:
if event not in machine.events:
self.error("Invalid event: %s is not part of machine: %s" % \
(event, machine))
t = Transition(self.symtab, machine, state, event, next_state,
self.actions, self.location, self.pairs)
machine.addTransition(t)
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