Re: C23 thoughts and opinions

On 23/05/2024 22:06, Keith Thompson wrote:

David Brown <david.brown@hesbynett.no> writes:

On 23/05/2024 14:11, bart wrote:

[...]

'embed' was discussed a few months ago. I disagreed with the poor
way it was to be implemented: 'embed' notionally generates a list of
comma-separated numbers as tokens, where you have to take care of
any trailing zero yourself if needed. It would also be hopelessly
inefficient if actually implemented like that.

>
Fortunately, it is /not/ actually implemented like that - it is only
implemented "as if" it were like that.  Real prototype implementations
(for gcc and clang - I don't know about other tools) are extremely
efficient at handling #embed.  And the comma-separated numbers can be
more flexible in less common use-cases.

[...]
 I'm aware of a proposed implementation for clang:
 https://github.com/llvm/llvm-project/pull/68620
https://github.com/ThePhD/llvm-project
 I'm currently cloning the git repo, with the aim of building it so I can
try it out and test some corner cases.  It will take a while.
 I'm not aware of any prototype implementation for gcc.  If you are, I'd
be very interested in trying it out.
 

I haven't seen anything concrete, but I believe I read about it in one of the papers discussing #embed.  It may have been just some tests and proofs-of-concept, and not a development branch or proposed implementation.

(And thanks for starting this thread!)
 

It's not easy to find a topic that is entirely about C, hasn't been discussed to death already, has enough controversial aspects for a serious discussion but not so many that it leads to fights and flames, and is not so esoteric that it causes most readers eyes to glaze over!