---
title: "Go Tricks 1"
date: 2022-03-23T16:23:05+07:00
draft: true
---

## Single Interface Function Wrapper

### Prototype

interface and its function wrapper defination

```golang
interface IEventHandler {
    DoSomething() int
}

type IEventHandlerWrapper func() int

func (ehw IEventHandlerWrapper)DoSomething() int {
    return ehw()
}
```

### Example

在某处定义

```golang
func RegisterEvent(ev string, handler IEventHandler);
```

可以更灵活处理

```golang
type SomeLogic struct {}

// implements check
var _ IEventHandler = (SomeLogic*)(nil)

func (sl *SomeLogic) DoSomething() int {
    return 0
}

// register

// 1.
RegisterEvent("something", &SomeLogic{})

// 2. write inplace.
RegisterEvent("others", IEventHandlerWrapper(func()int{
    return 0
}))
```