What types does the main pLimit function expect for its concurrency argument?

Question

RepoPilot · Accepted Answer

The `pLimit` function expects the `concurrency` argument to be either a **number** or an **object**.

According to the type definitions in [index.d.ts:L89], the function signature is:

```
export default function pLimit(concurrency: number | Options): LimitFunction;
```

When passing a number, it directly sets the concurrency limit. When passing an object, it should be of type `Options` [index.d.ts:L91-L104], which has:
- **`concurrency`** (required): a `number` with a minimum of `1`
- **`rejectOnClear`** (optional): a `boolean`, defaults to `false`

The implementation validates this in the `pLimit` function [index.js:L3-L10]. If an object is passed, it destructures the `concurrency` and `rejectOnClear` properties, then calls `validateConcurrency(concurrency)` [index.js:L123-L126] to ensure the concurrency value is an integer greater than 0 (or `Number.POSITIVE_INFINITY`).

FOLLOW_UPS:
- What happens if concurrency validation fails?
- How does rejectOnClear affect clearQueue behavior?
- Can you modify concurrency after creating a limit?