# Parameters

`import { Parameters } from "destack:types";`

Extract the parameter tuple from a callable type.

```ds title="Parameters"
export type Parameters<T> = T extends ((...infer P) => unknown) ? Parameters.P : never
```

[language/library/src/types/function.ds:21](https://github.com/destack-sh/destack/blob/main/language/library/src/types/function.ds#L21)