How to quickly write Golang comments in Vim

Vim is a powerful text editor and the first choice of many programmers. In the process of developing Golang, proper annotations are very important. This article will introduce how to quickly write Golang comments in Vim.

1. Comment command in Vim

In Vim, you can use ":" in command mode to enter the command line mode, and then use the command to insert comments. The following are some common commands for inserting comments in Vim:

1. Comment a single line: Enter "//" in command line mode, and then add "//" in front of the line to be commented.
2. Comment multiple lines: first enter Visual mode, press "Shift v" within the line range that needs to be commented, then move the cursor to select the line to be commented, then enter the capital letter "I", and then enter "// ", and then press the Esc key. After this step, you will find that all the selected lines have been commented out.
3. Uncomment: Enter ":" in command line mode, then enter "s/^//\s//" to remove the commented out single line comment. If you want to uncomment multiple lines, enter the command ":s/\v^\s(//|*)\s \zs//g".

2. Golang comment specifications

In Golang, comments have certain specifications. These specifications can help us read the code better and make it easier for others to understand our code. logic.

1. Single-line comments: Add "//" in front of the code that needs to be commented. For example:

   // 这是一行注释
   x := 1

2. Multi-line comments: add "/" and "/" before and after the code segment that needs to be commented. For example:

   /*
   这是一个多行注释
   x := 1
   y := 2
   */

3. Function comments: Add a comment template in front of the function that needs to be commented. For example:

   func SayHello(name string) {
       // SayHello is a function that takes in a name and returns a greeting string.
       fmt.Println("Hello, " + name)
   }

4. Parameter comment: Add a comment after the parameter. For example:

   func SayHello(name string) {
       // name is a string representing the name of the person to greet.
       fmt.Println("Hello, " + name)
   }

5. Return value comment: Specify the return value type in the function definition, and add a return value comment after the function. For example:

   // Add is a function that adds two integers and returns the result.
   func Add(x, y int) int {
       return x + y
   }

3. Golang automatically generates comments plug-in

For programmers who don’t want to write comments manually, you can use Golang automatically generate comments plug-in to quickly generate comments.

In Vim, you can use the vim-go plug-in to generate comments for functions and variables. Here's how to use the vim-go plug-in to automatically generate comments:

1. Install the vim-go plug-in: Run the following command in Vim:

   :PluginInstall +vim-go

2. Generate function comments: Above the function that needs to be commented, enter ":" and enter the following command to automatically generate comments.

   :GoDoc

   The automatically generated results are as follows:

   // SayHello is a function that takes in a name and returns a greeting string.
   func SayHello(name string) {
       fmt.Println("Hello, " + name)
   }

3. Generate variable comments: Move the cursor to the name of the variable that needs to be commented, and enter the following command to complete the automatic generation of comments.

   :GoInfo

   The generated results are as follows:

   // name is a variable that holds a string representing the name of the person to greet.
   var name string = "Tom"

4. Summary

In Golang, appropriate comments contribute to the readability and maintainability of the code. Very important. This article introduces how to manually write comments in Vim and how to use the vim-go plug-in to automatically generate comments. I hope this article can help Golang developers better improve code quality.

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