Thanks. My comment below.
>
> On Feb 21, 2017, at 11:18 AM, Marco S Hyman <m...@snafu.org> wrote:
>
>> The following code crashes:
>>
>> class Demo {
>> var value = 0
>> lazy var increment: (Int) -> Void = { [unowned self] by in
>> self.value += by
>> print(self.value)
>> }
>> }
>>
>> Demo().increment(3)
>> error: Playground execution aborted: error: Execution was interrupted,
>> reason: EXC_BREAKPOINT (code=EXC_I386_BPT, subcode=0x0).
>
> value is not a static/class variable. Without an instance of Demo it does
> not exist. This seems to work.
>
> class Demo {
> static var value = 0
> lazy var increment: (Int) -> Void = { [unowned self] by in
> value += by
> print(value)
> }
> }
>
The problem with this solution is that this changes the semantics. I want a
value for every Demo instance.
Ray
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