No; Swift just looks C-like enough that many of the various heuristics creduce 
has still work reasonably efficiently. Unless one's “good or not” script is 
doing something weird, the areas where creduce doesn’t understand Swift are 
ignored, because the compiler output is not going to match what the script is 
checking for.

The main downside of it not understanding Swift is that it is likely to be 
slower than on C, since it’ll be wasting its time on some mutations that will 
very very rarely be interesting.

Huon

> On Apr 19, 2017, at 17:16, Doug Hill <swiftus...@breaqz.com> wrote:
> 
> Ok, that's unexpected. Does creduce know about Swift now?
> 
> Doug Hill
> 
> 
>> On Apr 19, 2017, at 5:13 PM, Slava Pestov <spes...@apple.com> wrote:
>> 
>> Huon noticed that creduce actually works pretty well with Swift as-is. I’ve 
>> been using it without any issues.
>> 
>> Slava
>> 
>>> On Apr 19, 2017, at 3:53 PM, Doug Hill via swift-users 
>>> <swift-users@swift.org> wrote:
>>> 
>>> Is there a version of 'creduce' for Swift?
>>> 
>>> I did some basic googling and didn't find anything, so I thought I'd ask 
>>> here.
>>> 
>>> Thanks.
>>> 
>>> Doug Hill
> 

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