private TDfaState BuildState()
{
try
{
if (_builder._frozenNodesDictionary.TryGetValue(_nodesCollection, out _frozenNodes) == false)
{
_frozenNodes = _nodesCollection.Freeze();
_builder._frozenNodesDictionary[_frozenNodes] = _frozenNodes;
}
if (_builder._frozenLazyTransitionsDictionary.TryGetValue(_lazyTransitionsCollection, out _frozenTransitions) == false)
{
_frozenTransitions = _lazyTransitionsCollection.Freeze();
_builder._frozenLazyTransitionsDictionary[_frozenTransitions] = _frozenTransitions;
}
_stateHashCode = 0;
unchecked
{
_stateHashCode *= 397;
_stateHashCode ^= _frozenNodes.ElementsHashCode;
_stateHashCode *= 397;
_stateHashCode ^= _frozenTransitions.ElementsHashCode;
_stateHashCode *= 397;
_stateHashCode ^= _successTransition?.GetHashCode() ?? 0;
_stateHashCode *= 397;
_stateHashCode ^= _prevSuccessTransition?.GetHashCode() ?? 0;
}
if (_builder._frozenStatesDictionary.TryGetValue(this, out var frozen))
{
return(frozen);
}
frozen = _builder.CreateDfaState(_frozenNodes.Elements, _frozenTransitions.Elements, _successTransition, _prevSuccessTransition, _stateHashCode);
var stateKey = new DfaFrozenStateKey(frozen);
var stateValue = _nodesCollection.Count == 0 ? null : frozen;
_builder._frozenStatesDictionary[stateKey] = stateValue;
return(stateValue);
}
finally
{
Clear();
}
}
