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Using Generators: add Passing this #330

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Using Generators: add Passing this #330

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21 changes: 21 additions & 0 deletions pages/docs/essentials/using-generators.mdx
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Expand Up @@ -129,3 +129,24 @@ const program = Effect.gen(function* (_) {
// ...
})
```

## Passing `this`

In some cases, you might need to pass a reference to the current object (`this`) into the body of your generator function. You can achieve this by utilizing an overload that accepts the reference as the first argument:

```ts /this/
import { Effect } from "effect"

class MyService {
readonly local = 1
compute() {
return Effect.gen(this, function* (_) {
return yield* _(Effect.succeed(this.local + 1))
})
}
}

console.log(Effect.runSync(new MyService().compute())) // Output: 2
```

In this example, we have a `MyService` class with a property called `local`. By passing `this` as the first argument to `Effect.gen`, we make the `local` property available within the generator.
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