NullCheckUnaryOperator.cs

namespace Waher.Script.Model
{
    public abstract class NullCheckUnaryOperator : UnaryOperator 
    {
        protected readonly bool nullCheck;
 
        public NullCheckUnaryOperator(ScriptNode Operand, bool NullCheck, int Start, int Length, Expression Expression)
            : base(Operand, Start, Length, Expression)
        {
            this.nullCheck = NullCheck;
        }
 
        public bool NullCheck => this.nullCheck;
 
        public override bool Equals(object obj)
        {
            return obj is NullCheckUnaryOperator O &&
                this.nullCheck.Equals(O.nullCheck) &&
                base.Equals(obj);
        }
 
        public override int GetHashCode()
        {
            int Result = base.GetHashCode();
            Result ^= Result << 5 ^ this.nullCheck.GetHashCode();
            return Result;
        }
 
    }
}