golang annotation specifications

Comments are an essential tool when writing code, which can increase the readability and maintainability of the code. In Golang, comments are also very important. In order to make our code more standardized and easier to maintain, this article will introduce the relevant content of golang comment specifications.

1. Types of comments

There are three common types of comments in Golang: single-line comments, multi-line comments and function comments.

1. Single-line comments

Single-line comments are mainly used to explain the function of a line in the code, starting with //.

For example:

a := 1 // 定义变量a，并赋值1

2. Multi-line comments

Multi-line comments are used to comment on the function of a group of codes, ending with / /beginning and end.

For example:

/*
定义变量
a：整型
b: 字符串
*/
var a int
var b string

3. Function comments

Function comments are used to describe the parameters and return values ​​of the function, as well as the function and other information, placed in before the function declaration.

For example:

/*
函数名：Add
参数：
a：int 类型
b：int 类型
返回值：int类型
作用：实现两个数字相加的功能
*/
func Add(a, b int) int {
    return a + b
}

2. Position of comments

The position of comments in Golang is very flexible and can be placed in functions, variables, constants, initialization statements, structures, interfaces, etc. before or after the statement.

1. Function comments

Function comments should be placed before the function declaration, for example:

// 函数用于获取某个元素在数组中的位置
func getIndex(arr []int, value int) int {
    for i, v := range arr {
        if v == value {
            return i
        }
    }
    return -1
}

2. Variable and constant comments

Variable and constant comments can be placed before or after the declaration statement, for example:

// 定义一个整型变量
var n int
// 定义一个字符串变量
var s string
// 定义一个常量
const PI = 3.1415926
// 定义一个常量
const MAX_SIZE = 1024

3. Structure comments

Structure comments are placed before the structure declaration or after, for example:

// 定义一个人的信息结构体
type Person struct {
    // 姓名
    name string
    // 年龄
    age int
    // 职业
    profession string
}

3. The content of the annotation

The content of the annotation should be clear and clear, to avoid ambiguity.

1. Function comments

Function comments should contain the following:

• Function name
• Parameters (parameter name, data Type, function)
• Return value (data type, function)
• Function function

Take the getMax function as an example:

/*
函数名：getMax
参数：
a：int类型，第一个整数
b：int类型，第二个整数
返回值：int类型，返回两个整数中的最大值
作用：获取两个整数中的最大值
*/
func getMax(a, b int) int {
    if a > b {
        return a
    } else {
        return b
    }
}

2. Variable and constant comments

Variable and constant comments should contain the following:

• Variable name (or constant name)
• Data type
• Variable function

Take MAX_SIZE as an example:

// 定义一个最大值变量
const MAX_SIZE = 1024

3. Structure comments

The structure comments should contain the following content:

• Structure name
• Structure member name
• Structure member function

Take the Person structure as an example:

// 定义一个人的信息结构体
type Person struct {
    // 姓名
    name string
    // 年龄
    age int
    // 职业
    profession string
}

4. Summary

Comments are an essential part of code writing. Comments can make the code easier to understand and maintain. Standard comments can bring greater convenience to team collaboration and project maintenance. Therefore, when writing Golang code, you should pay attention to the type, location, and content of comments, and develop a good habit of writing comments to improve the readability and maintainability of the code.

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