golang export method comments

In Golang, you can provide clear API documentation for your export methods through annotations. This way other developers can easily understand how to use your export method. Next, we'll cover how to add annotations to your own export methods.

First of all, to make a method an exported method, you need to set the first letter of its name to uppercase. For example:

func Hello() {
    fmt.Println("Hello, world!")
}

This method is not exportable. We can change it to:

func SayHello() {
    fmt.Println("Hello, world!")
}

Now, the SayHello() method is an exported method. Other developers can use this method.

Next, we need to add annotations to this method. Comments should be formatted and contain necessary information. Here is a basic comment example:

// SayHello 输出一条 "Hello, world!" 的消息。
func SayHello() {
    fmt.Println("Hello, world!")
}

Comments should be placed above the method declaration and start with // followed by the comment content. The annotation includes the method name and a brief description of the method's functionality.

Sometimes, we need to add more detailed comments to methods. For example, we may need to add comments for the parameters and return values ​​of the method:

// AddNumbers 将两个整数相加。
//
// 参数：
// a: 一个整数。
// b: 一个整数。
//
// 返回值：
// 两个整数的和。
func AddNumbers(a int, b int) int {
    return a + b
}

In this example, we use multi-line comments, which contain detailed information such as method name, function, parameters, return value, etc. Parameter and return value comments use a specific format for clearer explanation.

To summarize, it is a good habit to add clear comments to your export methods. This helps other developers use your code more easily and makes it more readable and maintainable. Remember to use a formal format and include necessary information. As you use your code, comments will help you reduce communication costs and improve work efficiency.

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