我如何获得方法参数名称

时间:2015-02-10 13:30:28

标签: go

我有这个很好的函数,可以打印给定类型中给定方法的一些信息,这里是goplay

它完成了我所需要的一切,除了我找不到方法来获取方法参数名称,任何想法实现它?

    func AnalyzeMethod(instance interface {},methodName string){
        m,ok := reflect.ValueOf(instance).Type().MethodByName(methodName)
    if ok{
       isVariadic := m.Type.IsVariadic()
       var VariadicIndex int
       var VariadicType reflect.Type
       var FirstPositionalIndex int
       var LastPositionalIndex int
       var ArgsLength int = m.Type.NumIn()-1
       //var []string ArgumentNames //can't find a way to get an ordered slice of names of every argument that the function takes

       if ArgsLength>0{
         FirstPositionalIndex = 1
       }


       if isVariadic{
         VariadicIndex = ArgsLength
         VariadicType = m.Type.In(VariadicIndex)
         LastPositionalIndex = ArgsLength-1
       } else {
         VariadicIndex = -1
         LastPositionalIndex = ArgsLength
       }

       fmt.Println("ArgsLength:",ArgsLength)    
       fmt.Println("FirstPositionalIndex:",FirstPositionalIndex)
       fmt.Println("LastPositionalIndex:",LastPositionalIndex)  
       fmt.Println("Variadic:",isVariadic)
       fmt.Println("VariadicIndex:",VariadicIndex)
       fmt.Println("VariadicType:",VariadicType)
       fmt.Println("ArgumentNames","How?")

        }
}

1 个答案:

答案 0 :(得分:3)

局部变量(包括函数参数)的名称仅供程序员使用;编译器在生成代码时会丢弃它们。无法检索参数名称,因为它们在编译的代码中不可用。