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golang comment doc

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Release： 2023-05-21 19:25:05

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Golang is a widely used programming language. Its simplicity and efficiency make it the language of choice for many programmers. In the process of writing code, comments are a very important task, which can help programmers understand the code better and reduce code errors. In Golang, annotated documentation (doc) is a special type of comment that helps programmers generate documentation. This article will delve into the use of Golang annotation documents.

Overview

Comment document (doc) is a special comment type in Golang, which is written in the form between "/" and "/". Comment documents can use one of the following three formats: //, / / and //.

Common comment formats

// Format

## The #// format is the most commonly used format and is used in single-line comments. This format is suitable for single-line comments. For example:

//这是一个单行注释

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/format

/format is a common comment format and it can be used for comments of any length. For example:

/*
这是一个多行注释。
这是它的第二行。
*/

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// The format

// format is more convenient than the /

/ format in some cases, such as when you only need to annotate a function parameter or the name of the variable. For example:

func functionName(parameter1 int, parameter2 string) {
    // 这是parameter1的说明。
    // 这是parameter2的说明。
}

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Why use annotation documentation

Annotation documentation not only provides documentation in the code, but also generates HTML documentation so that developers can more easily view and understand the code. This way, code can be written and maintained more easily, reducing errors and code uselessness.

Golang annotation document example

Here is an annotation document example:

// Person represents a person.
type Person struct {
    // Name of the person.
    Name string

    // Age of the person.
    Age int
}

// NewPerson creates a new person.
func NewPerson(name string, age int) *Person {
    return &Person{
        Name: name,
        Age:  age,
    }
}

// OlderThan returns true if the person is older than the given age.
func (p *Person) OlderThan(age int) bool {
    return p.Age > age
}

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In this example, the annotation document details each part of the program. For example, the annotation for the Person structure briefly describes that it represents a person and lists the fields in the structure. The comment for the NewPerson function describes that it creates a new person and lists the function's two parameters. The comments for the OlderThan method describe that it returns true if the person is older than the given age.

Generate Documentation

In this section, we provide instructions on how to generate HTML documentation using command line tools. Run the go doc command to generate annotation documents in HTML form. This is a simple command that can output a document to the terminal:

$ go doc

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You can use the command go doc command to generate an HTML file, as shown below:

$ go doc -all > doc.go

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This command will generate a file called doc .go file contains documentation for the entire project. In this file, a specific package can be viewed by passing the file name to the go doc command, for example:

$ go doc package-name

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Summary

Using annotated documentation in Golang is a very important task, It not only provides documentation of the code, but also generates HTML files. Comment documents can use one of three formats: //, /

/ and //. HTML files can be generated using the go doc command. We want to ensure that when writing code, we use annotation documentation to the maximum extent to help developers understand the code more easily.

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