public override IExpression?Simplify()
{
var newChild = Child?.Simplify();
if (newChild is ConstantExpression childConst)
{
// child is constant
return(new ConstantExpression(BooleanFunctions.Not(childConst.Value)));
}
return(new NegateExpression(newChild));
}
protected override Number Evaluate(Number number)
{
return(BooleanFunctions.Not(number));
}