[swift-users] Implicitly capture a mutating self

[Richard Wei]

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 <mailto: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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