type hinting

In these cases, a special type of visual hinting is drawn on the background behind the GUI objects of the program or in its contiguous data: an insertion target.

在这些情形中，就需要一种特殊的视觉暗示出现在程序的背景或者连续数据中，即插入目标。

Type hinting, therefore, makes for safer code.

因此，类型提示使得代码更安全。

Let's start by taking a look at object types and the benefits of type hinting.

首先介绍一下对象类型和类型提示的优点。

What would really help here is some type hinting in the add() method signature.

此处真正有用的是add（）方法签名中的一些类型提示。

You can check them with type hinting and instanceof tests.

可以用类型提示和instanceof测试来检查它们。

It added several needed improvements, such as class visibility, proper constructors and destructors, type hinting, and a class-reflection API.

它提供了一些必要的改进，例如类可见性、合适的构造函数和解构函数、输入提示和类反射（class-reflection）API。