public object VisitSuperExpr(Expr.Super expr) { int distance; if (locals.TryGetValue(expr, out distance)) { LoxClass superclass = (LoxClass)environment.GetAt(distance, "super"); LoxInstance obj = (LoxInstance)environment.GetAt(distance - 1, "this"); LoxFunction method = null; if (expr.Method != null) { method = superclass.FindMethod(expr.Method.Lexeme); } else { method = superclass.FindMethod(superclass.Name); } if (method == null) { throw new InterpretingException(expr.Method, $"Undefined property '{expr.Method.Lexeme}'."); } return(method.Bind(obj)); } return(null); }
public LoxFunction Bind(LoxInstance instance) { var environment = new Environment(closure); environment.Define("this", instance); return(new LoxFunction(declaration, environment, isInitializer)); }
public object Call(Interpreter interpreter, List <object> arguments) { var instance = new LoxInstance(this); var initializer = FindMethod(this.name); if (initializer != null) { initializer.Bind(instance).Call(interpreter, arguments); } return(instance); }