[swift-evolution] [Review] SE-0099: Restructuring Condition Clauses

[Goffredo Marocchi]

Loved the insight about the positive net effect on language symmetry, quite important yet sometimes the unsung hero of such discussions :).

Sent from my iPhone

> On 6 Jun 2016, at 08:26, David Hart via swift-evolution <swift-evolution at swift.org> wrote:
> 
> 
>>    • What is your evaluation of the proposal?
> 
> +1 I’ve always been annoyed by the complicated grammar of condition clauses. This proposal simplifies them and makes them easier to understand and teach.
> 
> Especially, I regret that the syntax for A && B is different than B && A when A is a boolean expression and B is an optional unwrapping clause. It breaks a nice visual symmetry:
> 
> if a, let b = b {}
> if let b = b where a {}
> 
> This proposal brings back the symmetry.
> 
>>    • Is the problem being addressed significant enough to warrant a change to Swift?
> 
> It is.
> 
>>    • Does this proposal fit well with the feel and direction of Swift?
> 
> It brings more consistency, and it breaks the syntax. So it should be introduced for Swift 3.
> 
>>    • If you have used other languages or libraries with a similar feature, how do you feel that this proposal compares to those?
> 
> I haven’t used languages which had anything else than boolean expressions in their condition clauses, but I’ve always expected the syntax of A && B to be symmetrical to B && A.
> 
>>    • How much effort did you put into your review? A glance, a quick reading, or an in-depth study?
> 
> A long read of the original discussion and the review discussion.
> 
>> 
>> More information about the Swift evolution process is available at
>> 
>>    https://github.com/apple/swift-evolution/blob/master/process.md
>> 
>> Thank you,
>> 
>> -Joe
>> 
>> Review Manager
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> 
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