golang function annotation specifications

As an efficient, concise and powerful programming language, Golang has been increasingly widely used in the field of software development. In Go language, function is one of the basic units of programming. The standard comments of functions can help programmers better maintain the code, facilitate other developers to read your code, and increase the readability and maintainability of the code. This article will introduce you to some Golang function annotation specifications to guide your coding practice.

Function comment specifications

Comments are an important part of source code and have an important impact on reading source code and understanding the role of source code. A function comment is a user-defined block of code that provides descriptive information about the function. In order to write function comments well, we need to pay attention to the following aspects.

1. Function comment position

Go language function comments should be placed above the function definition, usually between the function definition and the function name.

For example:

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

The content of the comment should be concise and clear. You can use one sentence to describe the function and input and output of the function.

2. Function comment format

There are two main function comment formats in Go language, namely // and /* * /.

a. Function comment format 1: //

This format uses double slashes (//) to comment a single line of code. For function comments, you can describe it in one sentence, or use semicolons to separate statements and write one comment per line.

For example:

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

// Subtract is a function that subtracts two integers and returns the result.
func Subtract(x, y int) int {
    return x - y
}

b. Function comment format 2: /* */

This format uses / and / to comment multiple lines of code. For function comments, you can use multi-line comments to keep the length of each comment line consistent.

For example:

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

/*
Subtract is a function that subtracts two integers and returns the result.
*/
func Subtract(x, y int) int {
    return x - y
}

3. Function comment content

The function comment should contain the following content:

a. Function name

The name of the function should be as clear, concise and clear as possible. When writing function names, we must follow Golang's naming convention, use camel case naming, and the first letter is lowercase.

For example:

func Add(x, y int) int {
    return x + y
}

b. Input parameter description

In the function comment, we need to describe the input parameters of the function, including parameter type, parameter name and parameter function.

For example:

// Add is a function that adds two integers and returns the result.
//
// Parameters:
//     x (int): an integer number
//     y (int): an integer number
//
// Returns:
//     int: the sum of x and y
func Add(x, y int) int {
    return x + y
}

c. Return value description

The return value of the function also needs to be described in the function comment, including the return value type, return value name and return value meaning.

For example:

// Add is a function that adds two integers and returns the result.
//
// Parameters:
//     x (int): an integer number
//     y (int): an integer number
//
// Returns:
//     int: the sum of x and y
func Add(x, y int) int {
    return x + y
}

d. Function description

For complex functions, you can write a detailed description of its function in the function comment so that other developers can understand the function. What the function does.

For example:

// CalculateSum is a function that accepts a list of integers and returns their sum.
//
// Parameters:
//     nums ([]int): a slice of integer numbers
//
// Returns:
//     int: the sum of the integers in nums
//
// Description:
// This function iterates over the slice of integers and adds them up. It then returns the sum.
func CalculateSum(nums []int) int {
    sum := 0
    for _, num := range nums {
        sum += num
    }
    return sum
}

4. Suggestions for the location of function comments

In order to facilitate other developers to read and maintain your code, we recommend that you place it in the public Add comments on functions, complex functions, and functions involving important logic. Comments can help other developers quickly understand the function of the function, as well as important information such as input parameters and return values.

Summary

In Golang, function is one of the basic units of writing programs. Standardized function comments can help programmers better maintain code, facilitate other developers to read your code, and increase the readability and maintainability of the code. This article lists some Golang function annotation specifications. It is recommended that developers follow these specifications when writing code to improve the quality and maintainability of the code.

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