Wrong assumption on chapter ordering

[ineol]

The chapter about select assumes the Future trait has not yet been discussed, even though it is the chapter just after the Async in depth chapter:

This error isn't very clear and we haven't talked much about Future yet either. For now, think of Future as the trait that must be implemented by a value in order to call .await on it

[barafael]

Ironically, I was just about to report that the Async-in-depth chapter should come after the chapter on select, as select is a very practical and important concept. Perhaps the Async-in-depth chapter could be split into a part which discusses the future trait and then another part which really goes in depth. Then the order could be

• Futures
• Select
• Async in depth