interface Tap {
    <T>(data: T): T;
    fmt: (fmt: string) => <T>(data: T) => T;
}
/** ## `tap` : 用于控制台输出的MiddleWare
@example Usage - tap for console log
```ts
const res = pipe(1,(v)=>v+2,tap,(v)=>v*2 )
assert(res === 6)
//控制台输出: 3
```
@example Uasge - tap for implements Debug
````ts
// 对于实现Debug的数据结构直接调用log()方法
pipe( AnyErr(),tap)
//控制台输出: AnyErr 的log()方法
```
@category MiddleWare
*/
export declare const tap: Tap;
export {};
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