What are the key points to note in Golang function documentation and comments?

Key points of function documentation and comments: Function documentation includes: function signature, concise description, input parameters, return value, error handling, and examples. Comments include: line comments, block comments, member variable comments, and constant comments. Clear and accurate documentation and comments improve the readability and maintainability of Go code, promoting team collaboration and code understandability.

Key points in Go function documentation and comments

When writing Go code, clear and accurate documentation and comments are essential to maintain Code readability and maintainability are crucial. Here are some key points to consider in function documentation and comments:

Function documentation

• Function signature: Explicitly specify the function name , parameter and return value types.
• Concise description: Summarize the purpose of the function in one or two sentences. Avoid jargon or obscure language.
• Input parameters: Details the expected value and type of each input parameter.
• Return value: Describe the return value of the function, including type and meaning.
• Error handling: Describes the errors that the function may cause and how to handle these errors.
• Example: When possible, provide a code example that shows how the function is used.

Comments

• Line comments: are used to explain the purpose or behavior of a specific part of the code. Use the // prefix.
• Block comments: are used to describe more complex functions or data structures. Use the /* and */ prefixes.
• Member variables: Use the // annotation to describe the expected values ​​and usage of member variables in a structure or interface.
• Constants: Use // comments to explain the meaning and purpose of constant values.

Practical case

Function document example:

// Square 计算给定数字的平方。
//
// 参数：
//   x：要计算平方的数字。
// 返回值：
//   x 的平方。
func Square(x int) int {
    return x * x
}

Function comment example:

// handleError 处理一个错误，并返回一个合适的 HTTP 状态码。
//
// 如果错误为 nil，则返回状态码 200。否则，如果错误是已知的错误类型，则返回预定义的状态码。
// 对于其他错误，则返回状态码 500。
func handleError(err error) int {
    // ... 处理错误 ...

    return http.StatusOK // 200
}

Member variable comment example:

type User struct {
    // Name 表示用户的姓名。
    Name string
    // Age 表示用户的年龄（以年为单位）。
    Age int
}

Constant comment example:

// MaxRetries 定义可重试请求的最大次数。
const MaxRetries = 3

Following these guidelines will help you write Clean and maintainable Go code, thereby promoting team collaboration and code understandability.

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