CaseInsensitiveStringValues.cs

using System;
using Waher.Script.Abstraction.Sets;
using Waher.Script.Abstraction.Elements;
 
namespace Waher.Script.Objects
{
    public sealed class CaseInsensitiveStringValues : SemiGroup, IOrderedSet
    {
        private static readonly int hashCode = typeof(CaseInsensitiveStringValues).FullName.GetHashCode();
 
        public CaseInsensitiveStringValues()
        {
        }
 
        public static readonly CaseInsensitiveStringValues Instance = new CaseInsensitiveStringValues();
 
        public override bool Contains(IElement Element)
        {
            return Element is StringValue S && S.CaseInsensitive;
        }
 
        public override bool Equals(object obj)
        {
            return obj is CaseInsensitiveStringValues;
        }
 
        public override int GetHashCode()
        {
            return hashCode;
        }
 
        public int Compare(IElement x, IElement y)
        {
            StringValue s1 = (StringValue)x;
            StringValue s2 = (StringValue)y;
 
            return string.Compare(s1.Value, s2.Value, true);
        }
    }
}