tlang-interperter-cs/tlanglib/ScopeNode.cs

namespace tlang
{
    public class ScopeNode : Node
    {
        public bool First {get;set;}
        public List<Node> Body {get;set;}= new List<Node>();
        public override TObject Execute(IScopeEnvironment nodeEnv)
        {
            var sub = First ? nodeEnv : nodeEnv.SubEnv;
            TObject obj=new TNull();
            foreach(var item in Body)
            {
                obj=item.Execute(sub);
            }
            return obj;
        }
    }
}