[swift-evolution] RFC: didset and willset

[Brent Royal-Gordon]

> I may be wrong but I don't remember any other case of a keyword in
> Swift composed of two or more words, so I believe these should be
> exceptions.

`typealias` and `associatedtype` are the main examples; there were huge catfights on swift-evolution about whether the latter should be `associatedtype`, `associatedType`, or `associated_type`. There are also a number of attributes like `@noescape` and `@discardableResult`, which aren't 100% consistent.

-- 
Brent Royal-Gordon
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