Template and alloca?

[Jack]

On Wednesday, 26 May 2021 at 11:31:31 UTC, Ola Fosheim Grostad 
wrote:
> On Wednesday, 26 May 2021 at 08:38:29 UTC, Imperatorn wrote:
>> On Wednesday, 26 May 2021 at 07:34:06 UTC, Ola Fosheim Grøstad 
>> wrote:
>>> On Tuesday, 25 May 2021 at 17:55:17 UTC, Ola Fosheim Grostad 
>>> wrote:
>>>> Is it possible to use a template to write a "function" that 
>>>> provides initialized stack allocated memory (alloca)? Maybe 
>>>> I would have to use mixin?
>>>
>>> Nevermind, I've realized that I only need a way to force a 
>>> function to be inlined with 100% certainty. Then I can return 
>>> a structure holding alloca-allocated memory.
>>
>> Do you accomplish that with just pragma inline? (for future 
>> reference)
>
> I suspect that LDC allows LLVM to use an external function, but 
> I dont know for sure. I would have to look over the code it 
> sends to LLVM... But the beauty of Open Source is that it is 
> easy to modify LDC!
>
> Anyway, dont do this with C compilers, as they might refuse to 
> inline functions with alloca to prevent the stack from 
> exploding...
>
> Very much a low level approach, but fun!

for anyone that would ever use this approach with DMD remember to 
*always* use -inline flag otherwise the inline request by 
```pragma(inline, true)``` can be ignored and this will result in 
a nasty bug