(
&self,
on_fulfill: OptionalOption<ArgCallable>,
on_reject: OptionalOption<ArgCallable>,
vm: &VirtualMachine,
)
| 469 | |
| 470 | #[pymethod] |
| 471 | fn then( |
| 472 | &self, |
| 473 | on_fulfill: OptionalOption<ArgCallable>, |
| 474 | on_reject: OptionalOption<ArgCallable>, |
| 475 | vm: &VirtualMachine, |
| 476 | ) -> PyResult<PyPromise> { |
| 477 | let (on_fulfill, on_reject) = (on_fulfill.flatten(), on_reject.flatten()); |
| 478 | if on_fulfill.is_none() && on_reject.is_none() { |
| 479 | return Ok(self.clone()); |
| 480 | } |
| 481 | match &self.value { |
| 482 | PromiseKind::Js(prom) => { |
| 483 | let weak_vm = weak_vm(vm); |
| 484 | let prom = JsFuture::from(prom.clone()); |
| 485 | |
| 486 | let ret_future = async move { |
| 487 | let stored_vm = &weak_vm |
| 488 | .upgrade() |
| 489 | .expect("that the vm is valid when the promise resolves"); |
| 490 | let res = prom.await; |
| 491 | match res { |
| 492 | Ok(val) => match on_fulfill { |
| 493 | Some(on_fulfill) => stored_vm.interp.enter(move |vm| { |
| 494 | let val = convert::js_to_py(vm, val); |
| 495 | let res = on_fulfill.invoke((val,), vm); |
| 496 | convert::pyresult_to_js_result(vm, res) |
| 497 | }), |
| 498 | None => Ok(val), |
| 499 | }, |
| 500 | Err(err) => match on_reject { |
| 501 | Some(on_reject) => stored_vm.interp.enter(move |vm| { |
| 502 | let err = new_js_error(vm, err); |
| 503 | let res = on_reject.invoke((err,), vm); |
| 504 | convert::pyresult_to_js_result(vm, res) |
| 505 | }), |
| 506 | None => Err(err), |
| 507 | }, |
| 508 | } |
| 509 | }; |
| 510 | |
| 511 | Ok(PyPromise::from_future(ret_future)) |
| 512 | } |
| 513 | PromiseKind::PyProm { then } => Self::cast_result( |
| 514 | then.call( |
| 515 | ( |
| 516 | on_fulfill.map(IntoObject::into_object), |
| 517 | on_reject.map(IntoObject::into_object), |
| 518 | ), |
| 519 | vm, |
| 520 | ), |
| 521 | vm, |
| 522 | ), |
| 523 | PromiseKind::PyResolved(res) => match on_fulfill { |
| 524 | Some(resolve) => Self::cast_result(resolve.invoke((res.clone(),), vm), vm), |
| 525 | None => Ok(self.clone()), |
| 526 | }, |
| 527 | PromiseKind::PyRejected(err) => match on_reject { |
| 528 | Some(reject) => Self::cast_result(reject.invoke((err.clone(),), vm), vm), |
no test coverage detected