转到错误 : Final function parameter must have type

Question

我的功能有问题。我得到一个

final function parameter must have type

对于这个方法

func (s *BallotaApi) PostUser(c endpoints.Context,userReq Users) (userRes Users, error) {

    c.Debugf("in the PostUser method")

    user := userManger.login(userReq)//return a Users Type 

    return user, nil

我阅读了这些线程，但我无法弄清楚我哪里错了。看来我已经宣布了一切。

can-you-declare-multiple-variables-at-once-in-go

go-function-declaration-syntax

Answer 1

如果要命名返回参数，则必须命名所有

(userRes Users, err error)

这样，return statements可以申请。

如 Function type 中所述:

Within a list of parameters or results, the names (IdentifierList) must either all be present or all be absent.

如果您尝试命名一个而不是另一个，如 in this example ，你会得到:

func a() (b int, error) {
    return 0, nil
}
# command-line-arguments
/tmp/sandbox170113103/main.go:9: final function parameter must have type

---

Dave C提醒我们:

Named returns should normally be limited to helping make better/clearer godoc documentation or when you need to change return values in a deferred closure.
Other than that they should be avoided.