tlang-interperter-cs/tlanglib/EqualsNode.cs

namespace tlang
{
    internal class EqualsNode : Node
    {
        public Node Left {get;set;}
        public Node Right {get;set;}

        public EqualsNode(Node left, Node right)
        {
            this.Left = left;
            this.Right = right;
        }

        public override TObject Execute(IScopeEnvironment nodeEnv)
        {
            var l = Left.Execute(nodeEnv);
            var r = Right.Execute(nodeEnv);
            var lnum = l as TNumber;
            var rnum = r as TNumber;
            var lstr = l as TString;
            var rstr = r as TString;
            var lbool = l as TBoolean;
            var rbool = r as TBoolean;
            var lchar = l as TChar;
            var rchar = r as TChar;
             var dleft = l as TDictionary;

            if(dleft != null)
            {
                if(dleft.MemberExists("eq"))
                {
                    var mbm = dleft["eq"] as ICallable;
                    if(mbm != null)
                    {
                        return mbm.Call(r);
                    }
                    else {
                        var dright = r as TDictionary;
                        if(dright != null)
                        {
                            return TObject.Boolean(dleft == dright);
                        }
                    }
                }
                 else {
                        var dright = r as TDictionary;
                        if(dright != null)
                        {
                            return TObject.Boolean(dleft == dright);
                        }
                    }
            }

            if(lnum != null && rnum != null)
            return TObject.Boolean(lnum.Value == rnum.Value);
            if(lbool != null && rbool != null)
            return TObject.Boolean(lbool.Value == rbool.Value);
             if(lstr != null && rstr != null)
            return TObject.Boolean(lstr.Value == rstr.Value);
             if(lchar != null && rchar != null)
            return TObject.Boolean(lchar.Value == rchar.Value);


            return TObject.Null;
        }
    }
}