public void ReverseBracket()
{
if (type.Equals(BoolExpressionOperatorType.BracketOn))
{
type = BoolExpressionOperatorType.BracketOff;
}
else if (type.Equals(BoolExpressionOperatorType.BracketOff))
{
type = BoolExpressionOperatorType.BracketOn;
}
}
public override bool ToBool()
{
//Reverse Polish Notation reader
Stack <bool> stack = new Stack <bool>();
foreach (IBoolExpressionElement el in elements)
{
if (el is IBoolable)
{
stack.Push((el as IBoolable).ToBool());
}
else if (el is BoolExpressionOperator)
{
if ((el as BoolExpressionOperator).GetOperatorType().Equals(BoolExpressionOperatorType.Not))
{
bool a = stack.Pop();
stack.Push(!a);
}
else
{
BoolExpressionOperatorType type = (el as BoolExpressionOperator).GetOperatorType();
bool a = stack.Pop();
bool b = stack.Pop();
switch (type)
{
case BoolExpressionOperatorType.And:
stack.Push(a & b);
break;
case BoolExpressionOperatorType.Or:
stack.Push(a | b);
break;
case BoolExpressionOperatorType.Xor:
stack.Push(a ^ b);
break;
}
}
}
}
return(stack.Pop());
}
public BoolExpressionOperator(BoolExpressionOperatorType type)
{
this.type = type;
}
