[swift-evolution] ? suffix for <, >, <=, >= comparisons with optionals to prevent subtle bugs

[Al Skipp]

> On 15 Dec 2015, at 20:28, Fabian Ehrentraud <Fabian.Ehrentraud at willhaben.at> wrote:
> 
> The pet example took a while to digest. Not really intuitive, but makes sense when thinking it through.
> 
> BTW, thank you for "Swift Adventures In Monad Land", Al :-)

Thanks : ) Glad you found it useful, though it needs updating for Swift 2, and then Swift 3… 😬
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