Merge pull request #2102 from VanTanev/interpreter-from-infer-type

Provide convenience type InterpreterFrom<typeof machine>
statelyai · Apr 16, 2021 · 7eaad96 · 7eaad96
2 parents 14cdef6 + 25d93b5
commit 7eaad96
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diff --git a/.changeset/fifty-owls-check.md b/.changeset/fifty-owls-check.md
@@ -0,0 +1,5 @@
+---
+'xstate': patch
+---
+
+Provide a convenience type for getting the `Interpreter` type based on the `StateMachine` type by transferring all generic parameters onto it. It can be used like this: `InterpreterFrom<typeof machine>`
diff --git a/packages/core/src/types.ts b/packages/core/src/types.ts
@@ -1285,3 +1285,14 @@ export type ActorRefFrom<
   : never;
 
 export type AnyInterpreter = Interpreter<any, any, any, any>;
+
+export type InterpreterFrom<
+  T extends StateMachine<any, any, any, any>
+> = T extends StateMachine<
+  infer TContext,
+  infer TStateSchema,
+  infer TEvent,
+  infer TTypestate
+>
+  ? Interpreter<TContext, TStateSchema, TEvent, TTypestate>
+  : never;