public override bool Equals(object obj)
{
MatchRangeTransition other = obj as MatchRangeTransition;
if (other == null)
{
return(false);
}
return(Range == other.Range &&
base.Equals(other));
}
private Transition MergeTransitions(Transition first, Transition second)
{
Contract.Requires(first != null);
Contract.Requires(second != null);
Contract.Ensures(Contract.Result <Transition>().SourceState == null);
Contract.Ensures(Contract.Result <Transition>().IsRecursive == second.IsRecursive);
Contract.Assert(!first.IsRecursive);
Contract.Assert(first.IsEpsilon || !second.IsRecursive);
if (first.IsMatch)
{
if (!second.IsEpsilon)
{
throw new InvalidOperationException();
}
MatchRangeTransition matchRangeTransition = first as MatchRangeTransition;
if (matchRangeTransition != null)
{
return(new MatchRangeTransition(second.TargetState, matchRangeTransition.Range));
}
throw new NotImplementedException("Unknown match transition type.");
}
if (first.IsEpsilon)
{
if (second.IsEpsilon)
{
return(new EpsilonTransition(second.TargetState));
}
MatchRangeTransition matchRangeTransition = second as MatchRangeTransition;
if (matchRangeTransition != null)
{
return(new MatchRangeTransition(second.TargetState, matchRangeTransition.Range));
}
PopContextTransition popContextTransition = second as PopContextTransition;
if (popContextTransition != null)
{
var transition = new PopContextTransition(second.TargetState, popContextTransition.ContextIdentifiers);
//transition.PushTransitions.UnionWith(popContextTransition.PushTransitions);
//Contract.Assert(Contract.ForAll(transition.PushTransitions, i => i.SourceState != null));
return(transition);
}
PushContextTransition pushContextTransition = second as PushContextTransition;
if (pushContextTransition != null)
{
var transition = new PushContextTransition(second.TargetState, pushContextTransition.ContextIdentifiers);
//transition.PopTransitions.UnionWith(pushContextTransition.PopTransitions);
//Contract.Assert(Contract.ForAll(transition.PopTransitions, i => i.SourceState != null));
return(transition);
}
throw new NotSupportedException();
}
PopContextTransition popFirst = first as PopContextTransition;
if (popFirst != null)
{
if (second.IsEpsilon)
{
var transition = new PopContextTransition(second.TargetState, popFirst.ContextIdentifiers);
//transition.PushTransitions.UnionWith(popFirst.PushTransitions);
//Contract.Assert(Contract.ForAll(transition.PushTransitions, i => i.SourceState != null));
return(transition);
}
PopContextTransition popSecond = second as PopContextTransition;
if (popSecond != null)
{
var transition = new PopContextTransition(popSecond.TargetState, popFirst.ContextIdentifiers.Concat(popSecond.ContextIdentifiers));
////transition.PushTransitions.UnionWith(popFirst.PushTransitions);
//transition.PushTransitions.UnionWith(popSecond.PushTransitions);
//Contract.Assert(Contract.ForAll(transition.PushTransitions, i => i.SourceState != null));
return(transition);
}
if (second is PushContextTransition)
{
throw new InvalidOperationException();
}
if (second.IsMatch)
{
throw new NotSupportedException();
}
throw new NotImplementedException();
}
PushContextTransition pushFirst = first as PushContextTransition;
if (pushFirst != null)
{
if (second.IsEpsilon)
{
var transition = new PushContextTransition(second.TargetState, pushFirst.ContextIdentifiers);
//transition.PopTransitions.UnionWith(pushFirst.PopTransitions);
//Contract.Assert(Contract.ForAll(transition.PopTransitions, i => i.SourceState != null));
return(transition);
}
PushContextTransition pushSecond = second as PushContextTransition;
if (pushSecond != null)
{
var transition = new PushContextTransition(pushSecond.TargetState, pushFirst.ContextIdentifiers.Concat(pushSecond.ContextIdentifiers));
//transition.PopTransitions.UnionWith(pushFirst.PopTransitions);
////transition.PopTransitions.UnionWith(pushSecond.PopTransitions);
//Contract.Assert(Contract.ForAll(transition.PopTransitions, i => i.SourceState != null));
return(transition);
}
if (second is PopContextTransition)
{
throw new InvalidOperationException();
}
if (second.IsMatch)
{
throw new NotSupportedException();
}
throw new NotImplementedException();
}
throw new NotImplementedException();
}