# Copyright (c) 1999-2008 Mark D. Hill and David A. Wood
# Copyright (c) 2009 The Hewlett-Packard Development Company
# All rights reserved.
#
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# 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
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# documentation and/or other materials provided with the distribution;
# neither the name of the copyright holders nor the names of its
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# this software without specific prior written permission.
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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from slicc.ast.TypeFieldAST import TypeFieldAST
from slicc.symbols import Event, State, RequestType

class TypeFieldEnumAST(TypeFieldAST):
    def __init__(self, slicc, field_id, pairs_ast):
        super(TypeFieldEnumAST, self).__init__(slicc, pairs_ast)

        self.field_id = field_id
        self.pairs_ast = pairs_ast

    def __repr__(self):
        return "[TypeFieldEnum: %r]" % self.field_id

    def generate(self, type):
        if str(type) == "State":
            self.error("States must in a State Declaration, not a normal enum.")

        # Add enumeration
        if not type.addEnum(self.field_id, self.pairs_ast.pairs):
            self.error("Duplicate enumeration: %s:%s" % (type, self.field_id))

        # Fill machine info
        machine = self.symtab.state_machine

        if str(type) == "Event":
            if not machine:
                self.error("Event declaration not part of a machine.")
            e = Event(self.symtab, self.field_id, self.location, self.pairs)
            machine.addEvent(e)

        if str(type) == "RequestType":
            if not machine:
                self.error("RequestType declaration not part of a machine.")
            s = RequestType(self.symtab, self.field_id, self.location,
                           self.pairs)
            machine.addRequestType(s)