What are the best practices for writing Golang function documentation?

Best practices for writing Go function documentation: Use GoDoc comments to embed documents and write descriptive summaries; provide detailed parameter documentation, including purpose, type, and expected value; write return result documentation, describing type, expected value, and meaning; Provide code examples showing function usage; test code on the Go Playground to ensure accuracy.

Best practices for writing Go function documentation

In Go development, function documentation is important for understanding the purpose of the function and how to use it. It and its expected behavior are crucial. Following some best practices can ensure that function documentation is clear, useful, and easy to understand.

1. Using GoDoc comments

GoDoc comments are the standard way to embed documentation into your code. The syntax is:

// 包注释
package example

// 函数注释
func MyFunc(x int) int {
    // 函数方法注释
    return x + 1
}

2. Write a descriptive summary

The summary should be a short and clear summary of the function's objectives. It should explain what the function does without providing detailed implementation details.

// 计算两个数的和
func Sum(x, y int) int { 
    return x + y 
}

3. Provide detailed parameter documentation

The parameter documentation should describe the purpose, type and expected value of each parameter.

// 计算两个数的和
//
// 参数：
//   x: 第一个数
//   y: 第二个数
func Sum(x, y int) int { 
    return x + y 
}

4. Write the return result document

The return result document should describe the type, expected value and meaning of the value returned by the function.

// 计算两个数的和
//
// 返回值：
//   两个数的和
func Sum(x, y int) int { 
    return x + y 
}

5. Provide code examples

Code examples can help users understand how to use functions. Ideally, examples should be concise, practical, and show all the capabilities of the function.

// 计算两个数的和
//
// 示例：
//   result := Sum(5, 10)
func Sum(x, y int) int { 
    return x + y 
}

6. Testing code on Go Playground

Go Playground is an online environment for testing Go code. As you document your functions, you can run code examples here to make sure they work correctly.

Practical Case

The following is an example of a Sum function document that follows these best practices:

// 计算两个数的和
//
// 参数：
//   x: 第一个数
//   y: 第二个数
//
// 返回值：
//   两个数的和
//
// 示例：
//   result := Sum(5, 10)
func Sum(x, y int) int { 
    return x + y 
}

By following these best practices, you It can ensure that your Go function documentation is clear, useful and easy to understand, thereby improving code readability, maintainability and reusability.

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