[swift-users] Implicitly capture a mutating self

[Rien]

Just because it is called “Unsafe” does not mean it is unsafe :-)
It all depends on how you use it.

Regards,
Rien

Site: http://balancingrock.nl
Blog: http://swiftrien.blogspot.com
Github: http://github.com/Swiftrien
Project: http://swiftfire.nl




> On 16 Dec 2016, at 09:52, Richard Wei <rxrwei at gmail.com> wrote:
> 
> Zhao, it’s not a class.
> 
> Rien, unsafe pointers is the last thing I would ever want to introduce in my library…
> 
> Capturing self was clean, working perfectly, until Swift 3.0.2.
> 
> -Richard
> 
>> On Dec 16, 2016, at 02:49, Zhao Xin <owenzx at gmail.com> wrote:
>> 
>> What is the type of self? If it is a class, try [unowned self].
>> 
>> Zhaoxin
>> 
>> 
>> 
>> 
>> 
>> 
>> On Fri, Dec 16, 2016 at 4:33 PM, Rien via swift-users <swift-users at swift.org> wrote:
>> How about using:
>> 
>> UnsafeMutablePointer<TypeOfSelf>
>> 
>> ?
>> 
>> Regards,
>> Rien
>> 
>> Site: http://balancingrock.nl
>> Blog: http://swiftrien.blogspot.com
>> Github: http://github.com/Swiftrien
>> Project: http://swiftfire.nl
>> 
>> 
>> 
>> 
>> > On 16 Dec 2016, at 09:10, Richard Wei via swift-users <swift-users at swift.org> wrote:
>> >
>> > Capturing makes it immutable, which unfortunately can't solve this problem.
>> >
>> > -Richard
>> >
>> >> On Dec 16, 2016, at 02:05, Zhao Xin <owenzx at gmail.com> wrote:
>> >>
>> >> I did not test the code. But if you cannot implicitly capture a mutating self, you should do it explicitly, right?
>> >>
>> >> let blockSize = min(512, count)
>> >> let blockCount = (count+blockSize-1)/blockSize
>> >> device.sync { [self] () -> () in // Launch CUDA kernel
>> >>     try! fill<<<(blockSize, blockCount)>>>[
>> >>         .pointer(to: &self), .value(value), .value(Int64(count))
>> >>     ]
>> >> }
>> >>
>> >> Hope above code works.
>> >>
>> >> Zhaoxin
>> >>
>> >> On Fri, Dec 16, 2016 at 3:46 PM, Richard Wei via swift-users <swift-users at swift.org> wrote:
>> >> Hi,
>> >>
>> >> Swift 3.0.2 seems to have broken my code due to mutating self capture. But I have to pass inout self to the closure. Any workaround?
>> >>
>> >>     let blockSize = min(512, count)
>> >>     let blockCount = (count+blockSize-1)/blockSize
>> >>     device.sync { // Launch CUDA kernel
>> >>         try! fill<<<(blockSize, blockCount)>>>[
>> >>             .pointer(to: &self), .value(value), .value(Int64(count))
>> >>         ]
>> >>     }
>> >>
>> >> <PastedGraphic-1.png>
>> >>
>> >> -Richard
>> >>
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>> >>
>> >>
>> >
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