tlang-interperter-cs/tlanglib/LogicalAndNode.cs

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

        public LogicalAndNode(Node left, Node right)
        {
            Left = left;
            Right = right;
        }
        public override TObject Execute(IScopeEnvironment nodeEnv)
        {
            var l = Left.Execute(nodeEnv);
            var r = Right.Execute(nodeEnv);

            var ldict = l as TDictionary;

            if(ldict != null)
            {
                var lor=ldict["land"] as ICallable; 
                if(lor != null)
                {
                    return lor.Call(r);
                }
            }
            return TObject.Boolean(l.AsBoolean && r.AsBoolean);
        }
    }
}