pure and custom new / delete

[Benjamin Thaut]

Am 26.06.2012 18:44, schrieb Timon Gehr:
> On 06/26/2012 06:05 PM, Benjamin Thaut wrote:
>> Am 26.06.2012 18:02, schrieb Timon Gehr:
>>> On 06/26/2012 05:59 PM, Benjamin Thaut wrote:
>>>> As delete and new / delete overloading is deprecated and it was
>>>> recommeneded to write tempaltes to repalce these expressions I did so.
>>>>
>>>> But now as everything starts to work out pretty nice I've walked into
>>>> the 'purity' issue. Pure functions are only allowed to call other pure
>>>> functions and as far as I know there is no way to make functions
>>>> "trusted pure". But I would need to make certain functions "trused
>>>> pure", espeically my new and delete replacements. Any suggestions
>>>> how to
>>>> do this?
>>>>
>>>> Kind Regards
>>>> Benjamin Thaut
>>>
>>> You can cast function pointers to pure, or mark extern(C) memory
>>> allocation functions as pure.
>>
>> extern(c) is not an options as there is a structure of various different
>> allocators that implement a common interface which all is written in D.
>>
>> Is the compiler smart enough to optimize away a function pointer I
>> created localy just so I can cast it?
>>
>> Kind Regards
>> Benjamin Thaut
>
> You can examine the assembly code. DMD is perhaps not smart enough (it
> is unable to inline directly called function literals, so I am not
> optimistic.) LDC and GDC should certainly optimize it out.

The more I get into this, the more I get the feeling that all this "D 
can be used without a GC" is just a marketing trick to get C++ guys to 
use D.

I really like D because of a lot of nice features it has, but at the 
current rate I fear that the day I go back to c++ will come.