如果我有一個(gè)類型同義詞FooType和一個(gè)函數(shù)Foo，有沒有辦法堅(jiān)持它Foo是FooType. 我想要一個(gè)顯式，F(xiàn)ooType以便我可以在類型開關(guān)中使用它。var如果可以避免的話，我不想使用and 函數(shù)文字，因?yàn)檫@樣當(dāng)我嘗試重新定義函數(shù)時(shí)就不會(huì)出錯(cuò)。package mainimport (    "fmt"    "reflect")type FooType func(a int, b float64) float32// foo happens to be of FooType, but this relationship isn't// enforced by the compiler.func Foo(a int, b float64) float32 {    return 2.4}func main () {    fmt.Printf("type of foo: %v\n", reflect.TypeOf(foo))}這樣做的動(dòng)機(jī)是我有兩種類型的過(guò)濾器可以處理文本流或結(jié)構(gòu)化對(duì)象。// process items from channelfunction filter1(in <-chan interface{}, out chan<- chan interface{}) {    for item := range in {        out <- doStuff(item)    }}// process items from Scannerfunction filter2(scanner *Scanner, out chan<- chan interface{}) {    for scanner.Scan() {        out <- doStuff(scanner.Text())    }}我希望能夠編寫一個(gè)函數(shù)，該函數(shù)接受一個(gè)*exec.Cmd過(guò)濾器數(shù)組并將它們組合起來(lái)。