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feat(common): added typed overloaded for `AsyncPipe.transform()` (#14367) 

BREAKING CHANGE: Classes that derive from `AsyncPipe` and override
`transform()` might not compile correctly. Use of  `async` pipe in
templates is unaffected.

Mitigation: Update derived classes of `AsyncPipe` that override
`transform()` to include the type parameter overloads.

Related to #12398

PR Close #14367
This commit is contained in:
Chuck Jazdzewski 2017-01-31 18:11:18 -08:00 committed by Miško Hevery
parent 6b9aa2ca3d
commit 4da7925ad5
2 changed files with 7 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

5
modules/@angular/common/src/pipes/async_pipe.ts
View File

@ -82,6 +82,9 @@ export class AsyncPipe implements OnDestroy, PipeTransform {
}
}
transform<T>(obj: Observable<T>): T|null;
transform<T>(obj: Promise<T>): T|null;
transform<T>(obj: EventEmitter<T>): T|null;
transform(obj: Observable<any>|Promise<any>|EventEmitter<any>): any {
if (!this._obj) {
if (obj) {
@ -93,7 +96,7 @@ export class AsyncPipe implements OnDestroy, PipeTransform {
if (obj !== this._obj) {
this._dispose();
return this.transform(obj);
return this.transform(obj as any);
}
if (this._latestValue === this._latestReturnedValue) {

4
tools/public_api_guard/common/index.d.ts vendored
View File

@ -5,7 +5,9 @@ export declare const APP_BASE_HREF: InjectionToken<string>;
export declare class AsyncPipe implements OnDestroy, PipeTransform {
constructor(_ref: ChangeDetectorRef);
ngOnDestroy(): void;
transform(obj: Observable<any> | Promise<any> | EventEmitter<any>): any;
transform<T>(obj: EventEmitter<T>): T | null;
transform<T>(obj: Promise<T>): T | null;
transform<T>(obj: Observable<T>): T | null;
}
/** @stable */