[swift-evolution] [Draft] Abolish IUO type

Anton Zhilin antonyzhilin at gmail.com
Thu Mar 17 04:34:29 CDT 2016

+1 for the idea. It will extract compiler magic for IUO types into a variable declaration attribute.
-1 for current wording/details.

1. We have to add @implicitly_unwrapped attribute to the proposal. I hate implied "attributes", available only to compiler. The wording needs to be reformulated in terms of this attribute
2. We need to encourage using the attribute instead of `!`. In order to do this, I suggest finding a concise name for it. Like @IUO, but possibly more readable
3. In the future, `!` can be removed entirely and leave only the attribute. But not for now

- Anton

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