/// <summary>
/// Evaluates the expression for the given shape.
/// </summary>
/// <param name="shapes"></param>
/// <returns>The result of evaluating the expression.</returns>
public override bool Evaluate(ShapeSet shapes)
{
if (shapes == null)
{
throw new ArgumentNullException(nameof(shapes));
}
switch (ExpressionType)
{
case ExpressionType.And:
return(Expressions.All(e => e.Evaluate(shapes)));
case ExpressionType.Or:
return(Expressions.Any(e => e.Evaluate(shapes)));
case ExpressionType.BoolEqual:
return(Expressions.AreEqual());
case ExpressionType.Xor:
Debug.Assert(Expressions.Count == 2);
return(Expressions[0].Evaluate(shapes) ^ Expressions[1].Evaluate(shapes));
case ExpressionType.Not:
Debug.Assert(Expressions.Count == 1);
return(!Expressions[0].Evaluate(shapes));
default:
Debug.Assert(false);
throw new ArgumentOutOfRangeException();
}
}
public bool IsInconsistentWith(DecisionRule rule)
{
//do two rules have same background rule but different outputs?
return(Expressions.AreEqual(rule.Expressions) && Output != rule.Output);
}
