public override IExpression?Simplify()
{
var newLeft = Left?.Simplify();
var newRight = Right?.Simplify();
var leftConst = newLeft as ConstantExpression;
var rightConst = newRight as ConstantExpression;
if (leftConst != null && rightConst != null)
{
// two constants
return(new ConstantExpression(BooleanFunctions.Or(leftConst.Value, rightConst.Value)));
}
if (leftConst?.Value == 1 ||
rightConst?.Value == 1)
{
return(new ConstantExpression(1.0));
}
return(new OrExpression(newLeft, newRight));
}
protected override Number Evaluate(Number number1, Number number2)
{
return(BooleanFunctions.Or(number1, number2));
}