On 6/1/23 20:38, Breno Guimarães wrote:
> This is not as generic as you were proposing.
> The apply function forces the user to chose what is the scope of locking
> for multiple operations. So the compiler doesn't have to magically
> figure out in
> if (container.empty()) container.push();
> It should lock twice or just once. This os given by the user.

Then you create a new member function called container::scope_lock()
which returns my temporary object and you add it to the conditional
statement similar to:
https://github.com/philippeb8/std__ts/blob/master/ts.cpp#L23

But the new corrected code would be:

     if (auto scope_lock = l.scope_lock(); ! l.empty())
     {
         cout << "1) locked = " << boolalpha << l.mutex().locked() << endl;
     }

So the explicitness is very minimal here.

> See also:
> https://github.com/facebook/folly/blob/main/folly/docs/Synchronized.md
> <https://github.com/facebook/folly/blob/main/folly/docs/Synchronized.md>
>
> Em qui., 1 de jun. de 2023 21:05, Phil Bouchard via Std-Proposals
> <std-proposals_at_[hidden] <mailto:std-proposals_at_[hidden]>>
> escreveu:
>
>
>
> On 6/1/23 12:26, Jason McKesson via Std-Proposals wrote:
>
> > If you want "more positive feedback", you should strive not to
> come to
> > a fact-fight unarmed.
>
> A generic solution is right here and it solves exactly the problem I
> was
> raising:
> https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p0290r4.html <https://www.open-std.org/jtc1/sc22/wg21/docs/papers/2023/p0290r4.html>
>
> That basically proves again your negative evaluation of everything was
> in vain. Honestly there's a thin line between trolling and your
> comments
> to my regards for some reason.
>
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