Can you check the version of you Swift? Your code works in Xcode 8.2.1
(8C1002), Swift 3.0.2 (swiftlang-800.0.63 clang-800.0.42.1)
Zhaoxin
On Thu, Jan 26, 2017 at 2:49 AM, Doug Hill <swiftus...@breaqz.com> wrote:
> OK, I just tried testing this code in my app and a Swift playground. I
> also tried a variation on the initializer just for the heck of it. I get
> the following error:
>
> class Test<T>
> {
> var array:[T] = []
> var array2 = [T]()
>
> init() {
> var temp = self.array as NSArray
> var temp2 = self.array2 as NSArray
> }
> }
>
> *error: cannot convert value of type '[T]' to type 'NSArray' in coercion*
> * var temp = self.array as NSArray*
> * ~~~~~^*
> *error: cannot convert value of type '[T]' to type 'NSArray' in coercion*
> * var temp2 = self.array2 as NSArray*
> * ~~~~~^*
>
> Are there restrictions on what can be converted to NSArray?
>
> Doug Hill
>
> On Jan 25, 2017, at 9:24 AM, Doug Hill via swift-users <
> swift-users@swift.org> wrote:
>
> Thanks for the help. I'm still trying to figure out how Swift works,
> particularly what the error messages mean. This has been driving me a
> little nuts trying to figure out what is wrong via sometimes cryptic
> errors. Also, it seems like getting generic programming working in Swift is
> more difficult than I'm used to (even than C++!) so this answer helps
> figure out how the compiler works.
>
> Doug Hill
>
>
> On Jan 23, 2017, at 7:04 PM, Zhao Xin <owe...@gmail.com> wrote:
>
> It seems to me that you didn't initialize your `myArray` before you
> casted it. That caused the problem.
>
> Zhaoxin
>
> On Tue, Jan 24, 2017 at 9:34 AM, Jon Shier via swift-users <
> swift-users@swift.org> wrote:
>
>> enumerateObjects(options:using:) exists on NSArray in Swift. And I was
>> able to create your generic class just fine:
>>
>> class Test<T> {
>> var array: [T] = []
>>
>> init() {
>> var temp = array as NSArray
>> }
>> }
>>
>>
>
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