Let’s talk about how to write meaningful function comments in Go

In the Go language, a function is an independent block of code that receives some parameters and performs some operations. In function code, comments are a special grammatical structure used to add some notes and guidelines to functions so that developers can better understand and modify the code in subsequent maintenance and expansion. This article will explore how to write meaningful function comments in Go language.

The basic structure of Go language function is:

func name(parameters) (return values) {
    // function body
}

When declaring a function, we can add comments to provide developers with more information. Function comments in Go language are written using line-by-line comments (//), with the following format:

// FunctionName is a short description of the function.
// 参数a：表示描述参数a 的文本
// 参数b：表示描述参数b 的文本
// 返回值：描述函数的返回值的文本
// ExampleFunction 的实例
func FunctionName(a TypeOfA, b TypeOfB) (TypeOfReturn) {
    // Function Body
}

The information provided by the comments should be detailed enough to allow developers to understand the role and function of the function. Generally, function comments need to describe the following aspects:

1. The role and function of the function
2. The parameters of the function and their types
3. The return value of the function and its type
4. Example of function

The following is a simple example to demonstrate how to add comments to a function:

// Sum function is used to calculate the sum of two integers.
// 参数a：表示第一个整数
// 参数b：表示第二个整数
// 返回值：表示a和b的和
// ExampleSum函数的示例
func Sum(a int, b int) (int) {
    return a + b
}

Through the above comments, we can clearly understand this function Functions, parameters and their types, return values, and example usage.

Go language function comments can generate documentation through Godoc. Use the godoc command to view documentation for packages you have written. By default, the document will be on port 6060 on localhost. Just type the following command on the terminal:

$ godoc -http=:6060

Then enter http://localhost:6060 or http://:6060 in your browser to view the documentation.

In short, function comments are a very important aspect in the process of writing Go language functions. Proper comments can provide more information to the code so that other developers can better understand the code and modify it. In the comments, you need to describe in detail the role of the function, parameters and their types, return values ​​and their types, and example usage. At the same time, we can also generate readable documents through godoc so that other people can better view and use them.

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