11 lines
365 B
TypeScript
11 lines
365 B
TypeScript
|
class Chain<T> {
|
||
|
|
constructor(public value: T) { }
|
||
|
|
then<S>(cb: (x: T) => S): Chain<S> {
|
||
|
|
var result = cb(this.value);
|
||
|
|
// should get a fresh type parameter which each then call
|
||
|
|
var z = this.then(x => result)/*S*/.then(x => "abc")/*string*/.then(x => x.length)/*number*/; // No error
|
||
|
|
return new Chain(result);
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|