[swift-users] NSMutableData's init?(length length: Int) initializer

Dmitri Gribenko gribozavr at gmail.com
Fri Apr 15 01:22:34 CDT 2016

On Thu, Apr 14, 2016 at 11:16 PM, Chris Lattner via swift-users
<swift-users at swift.org> wrote:
>> On Apr 14, 2016, at 10:45 AM, soyer via swift-users <swift-users at swift.org> wrote:
>> Hello Guys, Girls,
>> Do you know why is the init?(length length: Int) NSMutableData's initializer failable?
>> The memory allocation can fail, but I think Swift doesn't handle that cases. (it is not a real issue in a modern OS)
>> The code on github calls a non failable initializer.
>> https://github.com/apple/swift-corelibs-foundation/blob/master/Foundation/NSData.swift#L904
> Swift’s policy on memory allocation failure is that fixed-size object allocation is considered to be a runtime failure if it cannot be handled.  OTOH, APIs that can take a variable and arbitrarily large amount to allocate should be failable.  NSData falls into the later category.

Does this principle apply to Array(repeating:count:)?


(j){printf("%d\n",i);}}} /*Dmitri Gribenko <gribozavr at gmail.com>*/

More information about the swift-users mailing list