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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                Golang 表達式 :根據調用者不同,方法分為兩種表現形式: ~~~ instance.method(args...) ---> <type>.func(instance, args...) ~~~ 前者稱為 method value,后者 method expression。 兩者都可像普通函數那樣賦值和傳參,區別在于 method value 綁定實例(method value 會復制receiver),而 method expression 則須顯式傳參 ~~~ type User struct { id int name string } func (self *User) Test() { fmt.Printf("%p, %v\n", self, self) } func main() { u := User{1, "Tom"} u.Test() mValue := u.Test mValue() // 隱式傳遞 receiver mExpression := (*User).Test mExpression(&u) // 顯式傳遞 receiver } ~~~ 在匯編層面,method value 和閉包的實現方式相同,實際返回 FuncVal 類型對象。 ~~~ FuncVal { method_address, receiver_copy } ~~~
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