Which parts of Golang function documentation are essential?

Golang function documentation essential parts include: Function signature: Contains function name, parameters and return value type Parameter description: Describes the type and meaning of each parameter Return value description: Indicates the return value type and meaning Example usage: Shows how to call Function Notes: Highlight function usage restrictions or precautions

A necessary part of Golang function documentation

Write and When working with functions, it's critical to create clear and complete documentation. Essential function documentation parts include:

1. Function signature

• Indicates the function name, parameters, and return value.

• Example:

  // returnSum 返回两个 int 的和。
  func returnSum(a, b int) int {
    return a + b
  }

2. Parameter description

• Describe the type and number of each parameter meaning.

• Example:

  // num1 指要相加的第一个数字。
  // num2 指要相加的第二个数字。
  func returnSum(num1, num2 int) int {
    return num1 + num2
  }

3. Return value description

• Indicates the return value type of the function and meaning.

• Example:

  // 返回两个 int 的和。
  func returnSum(num1, num2 int) int {
    return num1 + num2
  }

4. Example Usage

• Provides code examples to show how to use function.

• Example:

  package main
  
  import "fmt"
  
  func main() {
    result := returnSum(10, 20) // 调用 returnSum 函数并将结果存储在 result 中。
    fmt.Println(result)         // 打印结果。
  }

5. Notes

• Highlight any issues related to function usage Caveats or limitations.

• Example:

  // 如果 num1 或 num2 为负数，此函数将 panic。
  func returnSum(num1, num2 int) int {
    if num1 < 0 || num2 < 0 {
        panic("negative numbers not allowed") // 触发 panic。
    }
    return num1 + num2
  }

Practical case

Consider the following makeMap function, which Creates a map with the specified keys and values:

// makeMap 返回一个包含 key 值对的映射。
func makeMap(key1 string, value1 string, key2 string, value2 string) map[string]string {
    return map[string]string{
        key1: value1,
        key2: value2,
    }
}

Its function documentation can look like this:

// makeMap 返回一个包含 key 值对的映射。
//
// key1 指第一个键值对的键。
// value1 指第一个键值对的值。
// key2 指第二个键值对的键。
// value2 指第二个键值对的值。
//
// 例如：
//
// m := makeMap("name", "Alice", "age", "30")
func makeMap(key1 string, value1 string, key2 string, value2 string) map[string]string {
    return map[string]string{
        key1: value1,
        key2: value2,
    }
}

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