add AppContextState

src/app-context/app-context.ts

@@ -6,6 +6,7 @@ import {
   AppProvidedMerged,
   AppProvideOptions,
   AppContextUsed,
+  AppContextState,
 } from './types';
 import {
   createAsyncMethod,
@@ -351,6 +352,8 @@ async function test() {
       provide: 'baz',
     })
     .define();
+  
+  type Ctx2State = AppContextState<typeof ctx2>;
 
   const ctx2Used = await createAppContext().use(ctx2).define().start();
   const final = await createAppContext().use(ctx1).use(ctx2).define().start();

src/app-context/types.ts

@@ -12,6 +12,9 @@ type CurAndReq<Cur, Req> = {
 export type AppContext<Cur = Empty, Req = Empty> = AppContextCore<Cur, Req> &
   CurAndReq<Cur, Req>;
 
+export type AppContextState<A extends AppContext> =
+  A extends AppContext<infer Cur, infer Req> ? CurAndReq<Cur, Req> : never;
+
 export type AppServiceClass<
   Cur = Empty,
   Req = Empty,