Check-in missing file

Author: aikoven

lib/index.d.ts

@@ -10,33 +10,34 @@ export interface Action<P> extends AnyAction {
     error?: boolean;
     meta?: Meta;
 }
-export interface Success<P, S> {
+export declare type RequiredKeys<T> = {
+    [P in keyof T]: T[P] extends undefined ? never : P;
+}[keyof T];
+export declare type Optionalize<T> = Partial<T> & {
+    [P in RequiredKeys<T>]: T[P];
+};
+export declare type Success<P, S> = Optionalize<{
     params: P;
     result: S;
-}
-export interface Failure<P, E> {
+}>;
+export declare type Failure<P, E> = Optionalize<{
     params: P;
     error: E;
-}
+}>;
 export declare function isType<P>(action: AnyAction, actionCreator: ActionCreator<P>): action is Action<P>;
-export interface ActionCreator<P> {
+export declare type ActionCreator<P> = {
     type: string;
     match: (action: AnyAction) => action is Action<P>;
-    (payload: P, meta?: Meta): Action<P>;
-}
-export interface EmptyActionCreator extends ActionCreator<undefined> {
-    (payload?: undefined, meta?: Meta): Action<undefined>;
-}
+} & (P extends undefined ? (payload?: P, meta?: Meta) => Action<P> : (payload: P, meta?: Meta) => Action<P>);
 export interface AsyncActionCreators<P, S, E> {
     type: string;
     started: ActionCreator<P>;
     done: ActionCreator<Success<P, S>>;
     failed: ActionCreator<Failure<P, E>>;
 }
 export interface ActionCreatorFactory {
-    (type: string, commonMeta?: Meta, error?: boolean): EmptyActionCreator;
-    <P>(type: string, commonMeta?: Meta, isError?: boolean): ActionCreator<P>;
-    <P>(type: string, commonMeta?: Meta, isError?: (payload: P) => boolean): ActionCreator<P>;
+    <P = undefined>(type: string, commonMeta?: Meta, isError?: boolean): ActionCreator<P>;
+    <P = undefined>(type: string, commonMeta?: Meta, isError?: (payload: P) => boolean): ActionCreator<P>;
     async<P, S>(type: string, commonMeta?: Meta): AsyncActionCreators<P, S, any>;
     async<P, S, E>(type: string, commonMeta?: Meta): AsyncActionCreators<P, S, E>;
 }