38 lines
576 B
Go
38 lines
576 B
Go
package main
|
|
|
|
type Tuple[T any] struct {
|
|
v T
|
|
}
|
|
|
|
func (t Tuple[T]) Get() T {
|
|
return t.v
|
|
}
|
|
|
|
type Future[T any] interface {
|
|
Then(func(T))
|
|
}
|
|
|
|
type future[T any] struct {
|
|
fn func(func(T))
|
|
}
|
|
|
|
func (f *future[T]) Then(callback func(T)) {
|
|
f.fn(callback)
|
|
}
|
|
|
|
func Async[T any](fn func(func(T))) Future[T] {
|
|
return &future[T]{fn: fn}
|
|
}
|
|
|
|
func ReadFile(fileName string) Future[Tuple[error]] {
|
|
return Async[Tuple[error]](func(resolve func(Tuple[error])) {
|
|
resolve(Tuple[error]{v: nil})
|
|
})
|
|
}
|
|
|
|
func main() {
|
|
ReadFile("foo.txt").Then(func(v Tuple[error]) {
|
|
println(v.Get())
|
|
})
|
|
}
|