正确地传递结构以在golang中起作用

问题描述

我有一个golang结构:

I have a golang structure:

type Connection struct {
    Write chan []byte
    Quit chan bool
}

我用以下方法创建它:

newConnection := &Connection{make(chan []byte), make(chan bool)}

如何使用Connection参数和该类型的函数正确创建函数类型?

How to correctly create functional type with Connection parameter and function of this type?

我的意思是我想做这样的事情:

I mean that i want to do something like this:

type Handler func(string, Connection)

和

handler(line, newConnection)

handler 是的时候

func handler(input string, conn tcp.Connection) {}

cannot use newConnection (type *Connection) as type Connection in argument to handler

谢谢.

推荐答案

问题是 Handler 的类型是 Connection ，而您传递的值是输入 * Connection ，即Pointer-to-Connection.

the Problem is that the type of Handler is Connection and the value that you are passing is of type *Connection, i.e. Pointer-to-Connection.

将处理程序定义更改为* Connection

Change the handler definition to be of type *Connection

这是一个可行的示例:

package main

import "fmt"

type Connection struct {
    Write chan []byte
    Quit  chan bool
}

type Handler func(string, *Connection)

func main() {
    var myHandler Handler

    myHandler = func(name string, conn *Connection) {
        fmt.Println("Connected!")
    }

    newConnection := &Connection{make(chan []byte), make(chan bool)}

    myHandler("input", newConnection)

}

https://play.golang.org/p/8H2FocX5U9

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