Appender and CTFE

[Jacob Carlborg]

On 2011-03-03 16:35, Steven Schveighoffer wrote:
> On Thu, 03 Mar 2011 10:28:00 -0500, Jacob Carlborg <doob at me.com> wrote:
>
>> On 2011-03-03 14:12, bearophile wrote:
>>> Trass3r:
>>>
>>>> I think something should be done about this. Couldn't Appender be
>>>> implemented without using a pointer to a struct?
>>>
>>> There's no need for this, there is __ctfe (that thanks to fixing bug
>>> 4177 is usable in pure functions too), that allows to create two
>>> paths inside the Appender, one for CT and one for runtime.
>>>
>>> Bye,
>>> bearophile
>>
>> So much for the "having the same implementation for the compile time
>> function and the runtime function".
>>
>
> Actually, I think even if Appender wasn't implemented via pImpl style,
> it wouldn't be available to CTFE because it uses implementation details
> from the GC and runtime (for performance).
>
> I think a __ctfe thing is probably the right thing to do. Note that
> nobody cares about append performance in CTFE because it only affects
> compile time, not runtime, so the CTFE version can be really foolish and
> simple, and nobody cares if it's "implemented the same".
>
> -Steve

Yeah, but Walter and/or Andrei has mentioned that as a feature. Having 
the same code for compile time and runtime.

-- 
/Jacob Carlborg