[swift-evolution] [Proposal draft] Use obtain let instead if let construction

[Carlos García]

Hi Javier,

Maybe I’m not explained correctly in email. The change is not a "guard let”  replacement, instead it is a “if let” replacement.

Best,
Carlos

> On 08 Jan 2017, at 05:45, Javier Soto <javier.api at gmail.com> wrote:
> 
> Based on your examples I think you were thinking about the "guard" keyword, instead of "if"?
> 
> `If let foo = bar else` is not a valid construction. `if let foo = bar { } else {}` may have been what you meant, but in this case it is clear that this is just like a regular if, combined with unwrapping an optional.
> On Sat, Jan 7, 2017 at 7:12 PM thislooksfun via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
> -1 from me, I think that it makes perfect sense the way it is.
> 
> More specifically, I read `if let safe = optional` as "if optional can be unwrapped into safe, then ..."
> I think `obtain let` is more confusing, as it's not clear that it's a conditional from that keyword. Plus to me, "obtain" seems like it would be getting something from somewhere else, not always locally, maybe use an `unwrap` keyword in there somewhere, if you want it to be very clear what's happening?
> 
> -thislooksfun (tlf)
> 
>> On Jan 7, 2017, at 8:46 PM, Carlos García via swift-evolution <swift-evolution at swift.org <mailto:swift-evolution at swift.org>> wrote:
>> 
>> Hi all,
>> 
>> Here’s a draft proposal to change if let construction for obtain let. Proposal is at:
>> https://github.com/carlosypunto/swift-evolution/blob/obtain-let-instead-if-let/proposals/XXXX-Use-obtain-let-instead-if-let-constructions.md <https://github.com/carlosypunto/swift-evolution/blob/obtain-let-instead-if-let/proposals/XXXX-Use-obtain-let-instead-if-let-constructions.md>
>> 
>> I would like to see what you think and get help with "Effect on ABI stability" and "Effect on API resilience" points
>> 
>> Carlos
>> 
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> -- 
> Javier Soto

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