[swift-evolution] Optional comparison operators

[Jacob Bandes-Storch]

On Mon, Jul 11, 2016 at 9:54 PM, Chris Lattner <clattner at apple.com> wrote:

>
> On Jul 11, 2016, at 9:35 PM, Mark Lacey <mark.lacey at apple.com> wrote:
>
>
> On Jul 11, 2016, at 9:12 PM, Chris Lattner via swift-evolution <
> swift-evolution at swift.org> wrote:
>
>
> On Jul 11, 2016, at 8:14 PM, Jacob Bandes-Storch via swift-evolution <
> swift-evolution at swift.org> wrote:
>
> You'd have to unwrap it, or use the ??/==/!= operators:
> https://gist.github.com/jtbandes/9d88cc83ceceb6c62f38
>
> I'd be okay with </<=/>/>= returning Bool?, as I suggested in an older
> email (which somehow didn't make it to gmane's archive, but it's quoted in some
> other messages
> <http://thread.gmane.org/gmane.comp.lang.swift.evolution/10095>). I think
> it would be more convenient in some cases than unwrapping the individual
> values before comparing them.
>
>
> I’d be strongly opposed to those operator returning “Bool?”.  Doing so
> would prevent conforming to Comparable and would be extremely surprising.
>
> -Chris
>
>
> I just pushed the current draft of the proposal:
> https://github.com/rudkx/swift-evolution/blob/eliminate-value-to-optional-coercion/proposals/0000-disallow-value-to-optional-coercion-in-operator-arguments.md
>
> I haven’t addressed removal of the ordered comparison operators. I suspect
> this should be a separate proposal, but I can roll that into this one if
> it’s desired.
>
> I’ll update the proposal as the discussion continues until it’s selected
> for review.
>
>
> I think it makes sense to keep removal of the non-equality comparisons a
> separate proposal.
>

Here's a draft. Feedback welcome:

https://github.com/jtbandes/swift-evolution/blob/master/proposals/0122-remove-optional-comparison-operators.md
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