为什么在此代码的函数结尾处缺少返回值？

Question

func getKeyNameFromDeploymentAndSubnet(subnetType SubnetType, deploymentType DeploymentType, keyNameMap map[SubnetType]string) string {
    if (deploymentType == NoDeployment || deploymentType == PDBAWindows || deploymentType == AgentDeployment) {
        return keyNameMap[subnetType]
    }
    else if (deploymentType == AnsibleDeployment) {
        return "bar"
    }
    return "foo"
}

在第一条if语句中，我收到一个错误，即在函数错误结束时缺少返回。如果删除该else if语句，我不会收到此错误。我要去哪里错了？

Answer 1

之所以会出现此错误，是因为else语句必须}与第一个条件的结束处在同一行。

func getKeyNameFromDeploymentAndSubnet(subnetType SubnetType, deploymentType DeploymentType, keyNameMap map[SubnetType]string) string {
    if deploymentType == NoDeployment || deploymentType == PDBAWindows || deploymentType == AgentDeployment {
        return keyNameMap[subnetType]
    } else if deploymentType == AnsibleDeployment {
        return "bar"
    }
    return "foo"
}