What are the common errors in Golang function documentation?

Common errors in Go function documentation include: lack of description of parameter usage; syntax errors (such as exclamation marks); redundant information (repeating information already included in the function signature); inconsistent format (indentation alignment issues); lack of example usage.

Common mistakes in Go function documentation

Error 1: Lack of necessary information

func Foo(x, y int)

The function documentation lacks information describing the purpose of the parameters x and y.

Correct:

// Foo computes the sum of two integers.
func Foo(x, y int) int

Error 2: Syntax error

//! Foo computes the sum of two integers.
func Foo(x, y int) int

Exclamation mark in document! It is a syntax error and will cause document parsing to fail.

Correct:

// Foo computes the sum of two integers.
func Foo(x, y int) int

Error 3: Redundant information

// Foo computes the sum of two integers x and y.
func Foo(x, y int) int

"x" and "y" are already included in Function signatures, repeating them in documentation is redundant.

Correct:

// Foo computes the sum of two integers.
func Foo(x, y int) int

Error 4: Inconsistent formatting

// Foo computes the sum of two integers x and y.

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

The indentation of the document should be aligned with the function code, to Improve readability.

Correct:

// Foo computes the sum of two integers.
func Foo(x, y int) int {
    return x + y
}

Error 5: Missing example usage

Documentation should contain example usage to show how to use the function:

// Foo computes the sum of two integers.
func Foo(x, y int) int

// Examples of how to use Foo:
var (
    a = Foo(1, 2) // a == 3
    b = Foo(3, 4) // b == 7
)

Practical case

type Point struct {
    X, Y int
}

// Sum returns the sum of the coordinates of two points.
func Sum(p1, p2 Point) (sumX, sumY int) {
    return p1.X + p2.X, p1.Y + p2.Y
}

// Example usage:
func main() {
    point1 := Point{1, 2}
    point2 := Point{3, 4}
    sumX, sumY := Sum(point1, point2)
    fmt.Printf("Sum of Point1 and Point2: (%d, %d)\n", sumX, sumY)
}

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