feat(last): support type guards without casting

ReactiveX · Nov 7, 2016 · 07ecd5e · 07ecd5e
1 parent 3aa1988
commit 07ecd5e
Showing 1 changed file with 8 additions and 3 deletions.
diff --git a/src/operator/last.ts b/src/operator/last.ts
@@ -21,10 +21,15 @@ import { EmptyError } from '../util/EmptyError';
  * @owner Observable
  */
 /* tslint:disable:max-line-length */
-export function last<T>(this: Observable<T>, predicate?: (value: T, index: number, source: Observable<T>) => boolean): Observable<T>;
-export function last<T, S extends T>(this: Observable<T>, predicate?: (value: T, index: number, source: Observable<T>) => value is S): Observable<S>;
+export function last<T, S extends T>(this: Observable<T>,
+                                     predicate?: ((value: T, index: number, source: Observable<T>) => boolean) |
+                                                 ((value: T, index: number, source: Observable<T>) => value is S)): Observable<S>;
 export function last<T>(this: Observable<T>, predicate: (value: T, index: number, source: Observable<T>) => boolean, resultSelector: void, defaultValue?: T): Observable<T>;
-export function last<T, S extends T>(this: Observable<T>, predicate: (value: T, index: number, source: Observable<T>) => value is S, resultSelector: void, defaultValue?: S): Observable<S>;
+export function last<T, S extends T, R>(this: Observable<T>,
+                                        predicate: ((value: T, index: number, source: Observable<T>) => boolean) |
+                                                   ((value: T, index: number, source: Observable<T>) => value is S),
+                                        resultSelector?: ((value: S, index: number) => R) | void,
+                                        defaultValue?: S): Observable<S>;
 export function last<T, R>(this: Observable<T>, predicate?: (value: T, index: number, source: Observable<T>) => boolean, resultSelector?: (value: T, index: number) => R, defaultValue?: R): Observable<R>;
 /* tslint:disable:max-line-length */
 export function last<T, R>(this: Observable<T>, predicate?: (value: T, index: number, source: Observable<T>) => boolean,