public object VisitSuperExpr(Expr.Super expr) { if (_currentClass == ClassType.NONE) { _logger.Error(expr.Keyword, "Cannot use 'super' outside of a class."); } else if (_currentClass != ClassType.SUBCLASS) { _logger.Error(expr.Keyword, "Cannot use 'super' in a class with no superclass."); } ResolveLocal(expr, expr.Keyword); return(null); }
public object VisitSuperExpr(Expr.Super expr) { var distance = _locals[expr]; var superclass = (LoxClass)_environment.GetAt(distance, "super"); // "this" is always one level nearer than "super"'s environment. var @object = (LoxInstance)_environment.GetAt(distance - 1, "this"); var method = superclass.FindMethod(@object, expr.Method.Lexeme); if (method == null) { throw new RuntimeError(expr.Method, $"Undefined property '{expr.Method.Lexeme}'."); } return(method); }
public string VisitSuperExpr(Expr.Super expr) { return(Parenthesize2("super", expr.Method)); }