[bouk]

The first doesn't do control flow

[rcme]

Depends how getNext is defined.

[alphazard]

The only way to do control flow in getNext, consistent with how you partially defined it, is to panic. That means there is some important code wrapping the whole loop body that you left out.

[zeroxfe]

That doesn't make sense. `getNext()` has no ability to break out of the loop.