feat(core): support refinements in filter operator (#294)

mostjs · Jun 25, 2019 · 7b47c02 · 7b47c02
1 parent 2ea4a39
commit 7b47c02
Showing 1 changed file with 2 additions and 0 deletions.
diff --git a/packages/core/type-definitions/combinator/filter.d.ts b/packages/core/type-definitions/combinator/filter.d.ts
@@ -1,6 +1,8 @@
 import { Stream } from '@most/types';
 
+export function filter<A, B extends A>(p: (a: A) => a is B, s: Stream<A>): Stream<B>;
 export function filter<A>(p: (a: A) => boolean, s: Stream<A>): Stream<A>;
+export function filter<A, B extends A>(p: (a: A) => a is B): (s: Stream<A>) => Stream<B>;
 export function filter<A>(p: (a: A) => boolean): (s: Stream<A>) => Stream<A>;
 
 export function skipRepeats<A>(s: Stream<A>): Stream<A>;