Covariant MaybePromise<T>

Since Promise<T> is Covariant, this should also be. Solves flow errors when trying to introduce MaybePromise<T> into more places within the executor.
graphql · Feb 21, 2018 · c2c01e7 · c2c01e7
1 parent 5ec393e
commit c2c01e7
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/jsutils/MaybePromise.js b/src/jsutils/MaybePromise.js
@@ -7,4 +7,4 @@
  * @flow strict
  */
 
-export type MaybePromise<T> = Promise<T> | T;
+export type MaybePromise<+T> = Promise<T> | T;