golang struct comments

In golang, struct is a very common data type, used to define a custom data structure. When writing a program, in order to make the code clearer and easier to read, we usually add comments to explain the function of the code. In this article, we will explore how to add annotations to structs in golang, as well as some best practices for annotations.

1. Why do you need to add comments to golang struct?

1. Code readability
   In order to make the code more readable, we need to add comments to the struct so that other developers know the role of each field in the structure and the purpose of the structure. This makes the code more readable and easier to understand.
2. Documentation
   In many cases, comments can also serve as documentation. Putting comments into the code brings the documentation more closely together with the code, so other developers can better understand the code without having to open the document or jump to another web page.
3. Reduce Errors
   Comments can also help reduce errors because other developers can easily understand certain aspects of the code. This helps them find and fix errors quickly.

2. How to add comments to golang struct?

1. How to add comments:
   There are two ways to add comments in golang, single-line comments and multi-line comments.

Single-line comments: Use // to add single-line comments.

For example:

type Student struct{
    name     string    // 名字
    age      int       // 年龄
    gender   string    // 性别
}

Multi-line comments: Use /.../ to add multi-line comments.

For example:

/*
    结构体Person：表示人员信息
    name：姓名（必填）
    age：年龄（选填，默认18岁）
    gender：性别（必填）
*/
type Person struct{
    name    string
    age     int
    gender  string
} 

2. What should the content of the comment contain?

Comments should contain some basic information about the structure, such as: structure name, the role of the structure, the role of each field (attribute) and its type, etc.

For example:

/*
    Student结构体：用于描述学生信息
    name(string)：学生姓名
    age(int)：学生年龄
    gender(string)：学生性别
*/
type Student struct{
    name    string    // 学生姓名
    age     int       // 学生年龄
    gender  string    // 学生性别
}

3. Best practices for comments

1. Do not describe the code itself
   Comments should describe aspects of the code that cannot be seen through the structure itself Information such as the purpose of a structure or the context of a variable.
2. Situational Comments
   Comments should explain the function of the code in the current context and in an easy-to-understand manner, or possibly explain some doubts or possible pitfalls.
3. Single-line comments need to avoid a line that is too long
   If a single-line comment needs to exceed 80 characters, you need to use "//" at the end of the line to break the line.
4. Use comments and structure names to name variables
   This can make the code clearer and easier to read, and help other developers understand the code better.
5. Update comments
   If the code changes, then comments need to represent those changes. Comments must be updated as necessary during major changes to the code base.
6. Include only necessary comments
   Comments should be as concise as possible and contain only necessary information.

Conclusion

Golang struct comments play an important role in the readability and understanding of the code. Through the introduction of this article, we can know how to add comments to the structure and some best practices to make the code clearer and easier to read. By adding comments, you can make the code more maintainable, easier to understand, and more robust.

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