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kotlinlang

`when` isn’t a function, and it doesn’t take lambdas

```
when(x) {
    is Thing -&gt; {}
}
```
is better then
```
when(x) {
   it is Thing -&gt; {}
}
```

that second example is not valid Kotlin code

well it’s specifically because the braces attached to `when` don’t denote a lambda

and to introduce an implicit `it` would potentially be misleading

related, capturing the subject of a `when` was introduced in 1.3
```
fun Request.getBody() =
        when (val response = executeRequest()) {
            is Success -&gt; response.body
            is HttpError -&gt; throw HttpException(response.status)
        }
```