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Re: [std-proposals] Array Index in Range-based For Loops

From: Marcin Jaczewski <marcinjaczewski86_at_[hidden]>
Date: Fri, 3 Mar 2023 21:13:45 +0100
Hey guys do you remember this is about `for` loop? :>

And now back to modules.

Andrey said that modules are DOA and far in future before they could be used.
This intrigued me to check if my setup even could handle C++ Modules.

I found some random example from the internet:
https://godbolt.org/z/d1TexY88Y
Then downloaded it to my local setup (fresh cygwin gcc 11.3.0 on Win10).
And with a small hack to remove some godbolt quirks I manage to build
this project.

Checking https://access.redhat.com/solutions/19458 I see that the
current version
of Red Hat Enterprise Linux 9 ships with `gcc 11.2.x` and it too
should support C++ modules.

This means modules are available for the general public consumption
 (but still we need to add some boilerplate to make it work).


pt., 3 mar 2023 o 20:39 Jason McKesson via Std-Proposals
<std-proposals_at_[hidden]> napisał(a):
>
> On Fri, Mar 3, 2023 at 1:08 PM Andrey Semashev via Std-Proposals
> <std-proposals_at_[hidden]> wrote:
> >
> > On 3/3/23 19:52, Jason McKesson via Std-Proposals wrote:
> > > On Fri, Mar 3, 2023 at 4:53 AM Andrey Semashev via Std-Proposals
> > > <std-proposals_at_[hidden]> wrote:
> > >> or if `import std` is more expensive than `#include <cstddef>` (or pick any
> > >> other lightweight header)
> > >
> > > We already have an answer to this. There's evidence, from the compiler
> > > that supports a standard library import, that it is close to an order
> > > of magnitude faster to `import std;` than to include even one header.
> > > The evidence is listed in P2412.
> >
> > While this is better than nothing (thanks for sharing the reference to
> > the proposal), this is just one implementation on a platform that is
> > infamous for its slow filesystem. Given the history with precompiled
> > headers, which offered a significant speedup with MSVC on Windows and
> > nearly no benefit on other platforms, I'll keep my reservations until I
> > see numbers on other platforms and implementations.
> >
> > > I know there are a lot of questions about modules out there. But
> > > people keep reraising these questions as if there aren't already
> > > answers to at least some of them.
> >
> > I would say, that's because finding this kind of information is
> > virtually impossible unless you follow closely the particular proposals
> > or on the discussions on the MLs and reflectors.
>
> Or, you know, watch presentations at C++ conferences about the subject
> (https://www.youtube.com/watch?v=0f5N1JKo4D4). Finding information is
> only "virtually impossible" if you don't bother to look for it. I know
> Google is pretty broken these days for finding real information, but
> this stuff is not hiding.
> --
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> Std-Proposals_at_[hidden]
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Received on 2023-03-03 20:13:59