Error: variable 'xyz' has scoped destruction, cannot build closure

[Jon Degenhardt]

On Friday, 5 October 2018 at 06:44:08 UTC, Nicholas Wilson wrote:
> On Friday, 5 October 2018 at 06:22:57 UTC, Nicholas Wilson 
> wrote:
>> tenRandomNumbers.each!((n,o) => 
>> o.appendln(n.to!string))(output);
>>
>> or
>>
>> tenRandomNumbers.each!((n, ref o) => 
>> o.appendln(n.to!string))(output);
>>
>> should hopefully do the trick (run.dlang.io seems to be down 
>> atm).
>>
>
> Alas is does not because each does not accept additional 
> argument other than the range. Shouldn't be hard to fix though.

Yeah, that's what I was seeing also. Thanks for taking a look. Is 
there perhaps a way to limit the scope of the delegate to the 
local function? Something that would tell the compiler the 
delegate has a lifetime shorter than the struct.

One specific it points out is that this a place where the 
BufferedOutputRange I wrote cannot be used interchangeably with 
other output ranges. It's minor, but the intent was to be able to 
pass this anyplace an output range could be used.