函数体外的代码

在 Go 语言中，变量声明必须位于花括号内。在提供的代码中，“var paths = routes”行引发错误，因为它将变量声明放在了花括号外。要解决此问题，需要将花括号移动到“var paths =”前面，使其变为“var paths = Routes{”。

我用 go 编写了一些关于“go web development cookbook.pdf”的 api 代码。当我运行代码时遇到错误。我用切片声明了一个敲击和首字母缩写，在切片内我制作了两个切片项目，但是当我执行此操作时，它显示“函数体外部的非声明语句”，我在互联网上搜索了解决方案。 这是我的代码：

package main
import
(
    "fmt"
    "encoding/json"
    "log"
    "net/http"
    "github.com/gorilla/mux"
)
const
(
    CONN_HOST = "localhost"
    CONN_PORT = "8080"
)
type Route struct
{
    Name string
    Method string
    Pattern string
    HandlerFunc http.HandlerFunc
}
type Routes [] Route
var routes = Routes
{
    Route
    {
        "getEmployees",
        "GET",
        "/employees",
        getEmployees,
    },
    Route
    {
        "getEmployee",
        "GET",
        "/employee/{id}",
        getEmployee,
    },
}

type Employee struct
{
    Id string `json:"id"`
    FirstName string `json:"firstName"`
    LastName string `json:"lastName"`
}
type Employees []Employee
var employees []Employee
func init() {
    employees = employees {
        Employee{Id: "1", FirstName: "Foo", LastName: "Bar"},
        Employee{Id: "2", FirstName: "Baz", LastName: "Qux"},
    }
}

func getEmployees(w http.ResponseWriter, r *http.Request) {
    json.NewEncoder(w).Encode(employees)
}

func getEmployee(w http.ResponseWriter, r *http.Request) {
    vars := mux.Vars(r)
    id := vars["id"]
    for _, employee := range employees {
        if employee.Id == id {
            if err := json.NewEncoder(w).Encode(employee); err != nil {
                log.Print("error getting requested employee :: ", err)
            }
        }
    }
}
func AddRoutes(router *mux.Router) *mux.Router {
    for _, route := range routes {
        router.
        Methods(route.Method).
        Path(route.Pattern).
        Name(route.Name).
        Handler(route.HandlerFunc)
    }
    return router
}
func main() {
    muxRouter := mux.NewRouter().StrictSlash(true)
    router := AddRoutes(muxRouter)
    err := http.ListenAndServe(CONN_HOST+":"+CONN_PORT, router)
    if err != nil {
        log.Fatal("error starting http server :: ", err)
        return
    }
}

“var paths = routes”行指示错误。

解决方案

你的代码格式有问题，在go中你需要维护花括号的约定，你不能把它放在另一行，你需要这样做：

var routes = Routes{
    Route{
        "getEmployees",
        "GET",
        "/employees",
        getEmployees,
    },
    Route{
        "getEmployee",
        "GET",
        "/employee/{id}",
        getEmployee,
    },
}

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