# PeekableIterator

`import { PeekableIterator } from "destack:iter";`

Iterator with one buffered yielded value.

```ds title="PeekableIterator"
export struct PeekableIterator<I, T, R = void>
```

[language/library/src/iter/iterator.ds:189:195](https://github.com/destack-sh/destack/blob/main/language/library/src/iter/iterator.ds#L189-L195)