Go에서 Is() 및 As()를 사용하여 재귀 오류 래핑을 어떻게 달성할 수 있나요?

type errorChain struct {
    err  error
    next *errorChain
}

func (c errorChain) Is(err error) bool {
    // Check the current error against the given error
    if c.err == err {
        return true
    }
    // Check if there is a wrapped error and recursively call Is()
    if c.next != nil {
        return c.next.Is(err)
    }
    return false
}

func (c errorChain) As(target interface{}) bool {
    // Check if the current error As() to the target interface
    if errors.As(c.err, target) {
        return true
    }
    // Check if there is a wrapped error and recursively call As()
    if c.next != nil {
        return c.next.As(target)
    }
    return false
}

func Wrap(errs ...error) error {
    if len(errs) == 0 {
        return nil
    }
    // Create the first error in the chain
    out := &errorChain{err: errs[0]}
    // Iterate over the remaining errors
    for _, err := range errs[1:] {
        // Link the errors together
        out.next = &errorChain{err: err}
        out = out.next
    }
    return out
}

var Err1 = errors.New("error 1")
var Err2 = errors.New("error 2")
var Err3 = errors.New("error 3")

err := Wrap(Err1, Err2, Err3)

fmt.Println(errors.Is(err, Err2)) // true
fmt.Println(errors.Is(err, Err3)) // true
fmt.Println(errors.Is(err, Err0)) // false