Documentation guide for golang functions

In the Go language, writing clear and useful function documentation is crucial to improve code maintainability, readability, and collaboration efficiency. Here are some guidelines for documenting Go functions: Add documentation using // comments Specify input and output parameters Write a body paragraph describing function purpose and usage Include example code showing usage Document exception conditions and error handling Keep documentation short and relevant Use markup to enhance readability Consistently follows the GoDoc specification

Golang Function Document Writing Guide

In the Go language, function documentation is crucial because it can Help developers understand the purpose, usage and constraints of functions. Good function documentation can improve code maintainability, readability, and collaboration efficiency. Here are some guidelines for writing clear and useful Go function documentation:

1. Comment using //

Use // Comment start line comment to add documentation to the function. For example:

// Calculate the area of a circle with radius r
func CircleArea(r float64) float64 {
    return math.Pi * r * r
}

2. Include input and output parameters

Explicitly specify the function's parameters and return type, including any required type or range restrictions.

// Add two integers and return the result
//
// a: first integer
// b: second integer
func Add(a, b int) int {
    return a + b
}

3. Write the body paragraph

Use natural language to describe what the function does, how to use it, and what it is expected to do. For example:

// Convert a string to uppercase and return the result
//
// s: the string to be converted
func ToUpper(s string) string {
    return strings.ToUpper(s)
}

4. Include sample code

The sample code shows how to use the function, which is helpful for understanding the practical application of the function.

// Format a date as "YYYY-MM-DD"
func FormatDate(d time.Time) string {
    return d.Format("2006-01-02")
}

// Example: Print the formatted current date
func main() {
    fmt.Println(FormatDate(time.Now()))
}

5. Record exception conditions and error handling

Record any exceptions or error messages that the function may throw and explain how to handle them.

// Open a file and return a file pointer
//
// path: the path to the file
func OpenFile(path string) (*os.File, error) {
    return os.Open(path)
}

// Example: Handle file opening error
func main() {
    file, err := OpenFile("non-existent-file")
    if err != nil {
        // Handle the error
        fmt.Println(err)
    }
}

6. Keep documentation short and relevant

Avoid redundant or unnecessary information and focus on the necessary details of the function.

7. Use markup

Go language supports using Markdown syntax to mark up function documents to enhance readability and visibility.

// Calculate the area of a triangle
//
// base: length of the base of the triangle
// height: height of the triangle
func TriangleArea(base, height float64) float64 {
    return 0.5 * base * height
}

8. Follow GoDoc specifications

The GoDoc tool generates function documentation, so follow GoDoc specifications to ensure consistency and readability.

Remember: Good function documentation is the key to creating maintainable and extensible code. By following these guidelines, you can write clear and helpful documentation that makes your code easier to understand and use.

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