Trouble with TypeScript Types in Effect Wrapper Function
i'm trying to extract a wrapper function that takes a generator and context. however, i'm finding it impossible to get the types right.
i'd like to have a wrapper function that looks like:
but
export async function loader({ context }: Route.LoaderArgs) {
const program = Effect.gen(function* () {
const service = yield* GreeterService;
const output = yield* service.sayHello({ name: "Dave" });
yield* Effect.log(`message received: ${output.message}`);
return { message: output.message };
});
return Effect.runPromise(Effect.provide(program, context.serviceContext));
}export async function loader({ context }: Route.LoaderArgs) {
const program = Effect.gen(function* () {
const service = yield* GreeterService;
const output = yield* service.sayHello({ name: "Dave" });
yield* Effect.log(`message received: ${output.message}`);
return { message: output.message };
});
return Effect.runPromise(Effect.provide(program, context.serviceContext));
}i'd like to have a wrapper function that looks like:
export function makeEffectLoader<R, E, A>(
generator: (
context: Route.LoaderArgs
) => Generator<Effect.Effect<R, E, A>, A, unknown>
): (context: Route.LoaderArgs) => Promise<A> {
return async (context: Route.LoaderArgs): Promise<A> => {
// ****
// Type 'Effect<R, E, A>' is missing the following properties from type 'YieldWrap<Effect<any, any, any>>': #private, [YieldWrapTypeId]
const program: Effect.Effect<A, Error, ServiceContext> = Effect.gen(() =>
generator(context)
);
// (alias) type ServiceContext = Context<GreeterService | GreeterClient>
return Effect.runPromise(
// ts: Argument of type 'Effect<A, Error, Context<GreeterService | GreeterClient>>' is not assignable to parameter of type 'Effect<A, Error, never>'.
// Type 'Context<GreeterService | GreeterClient>' is not assignable to type 'never'.
Effect.provide(program, context.context.serviceContext)
);
};
}export function makeEffectLoader<R, E, A>(
generator: (
context: Route.LoaderArgs
) => Generator<Effect.Effect<R, E, A>, A, unknown>
): (context: Route.LoaderArgs) => Promise<A> {
return async (context: Route.LoaderArgs): Promise<A> => {
// ****
// Type 'Effect<R, E, A>' is missing the following properties from type 'YieldWrap<Effect<any, any, any>>': #private, [YieldWrapTypeId]
const program: Effect.Effect<A, Error, ServiceContext> = Effect.gen(() =>
generator(context)
);
// (alias) type ServiceContext = Context<GreeterService | GreeterClient>
return Effect.runPromise(
// ts: Argument of type 'Effect<A, Error, Context<GreeterService | GreeterClient>>' is not assignable to parameter of type 'Effect<A, Error, never>'.
// Type 'Context<GreeterService | GreeterClient>' is not assignable to type 'never'.
Effect.provide(program, context.context.serviceContext)
);
};
}but
effecteffect doesn't seem to play nicely with typing. any help?
