public override Value Execute(Args args, Environment environment, SourcePos pos) { var result = new ValueList(); if (!args.HasArg("module")) { foreach (var symbol in environment.GetSymbols()) { result.AddItem(new ValueString(symbol)); } } else { var moduleArg = args.Get("module"); Dictionary <string, Value> module; if (moduleArg.IsString()) { module = environment.Get(moduleArg.AsString().GetValue(), pos).AsObject().value; } else { module = args.Get("module").AsObject().value; } foreach (var symbol in module.Keys) { result.AddItem(new ValueString(symbol)); } } return(result); }