UndefinedLiteral.cs

using System;
using Waher.Runtime.Inventory;
 
namespace Waher.Content.Semantic.Model.Literals
{
    public class UndefinedLiteral : SemanticLiteral
    {
        public UndefinedLiteral()
            : base()
        {
        }
 
        public override string StringType => null;
 
        public override Grade Supports(Type ValueType)
        {
            return Grade.NotAtAll;
        }
 
        public override ISemanticLiteral Encapsulate(object Value)
        {
            return new UndefinedLiteral();
        }
 
        public override ISemanticLiteral Parse(string Value, string DataType, string Language)
        {
            return new UndefinedLiteral();
        }
 
        public override bool Equals(object obj)
        {
            return obj is UndefinedLiteral;
        }
 
        public override int GetHashCode()
        {
            return typeof(UndefinedLiteral).GetHashCode();
        }
 
        public override string ToString()
        {
            return "UNDEF";
        }
    }
}