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Re: [std-proposals] Standard library should have a simple 'gate' for multithreading

From: Thiago Macieira <thiago_at_[hidden]>
Date: Fri, 22 Jul 2022 11:37:08 -0700
On Friday, 22 July 2022 11:11:21 PDT Hyman Rosen wrote:
> On Fri, Jul 22, 2022 at 11:24 AM Thiago Macieira via Std-Proposals <
> std-proposals_at_[hidden]> wrote:
> > Hence the rule: NEVER use a std::pair. There are no exceptions, zero,
> > nada,
> > nil.
> If we cannot trust the language standardization process to produce a usable
> library type that just represents a pair of things, why would we trust it
> to produce usable library types for concurrent programming, or for anything
> else, for that matter? Isn't this a sign that something is dreadfully
> wrong?

No. The problem is not with std::pair. There's nothing wrong with the class as
standardised (which was C++98, so it's dated) or implemented.

No, the problem is in your attempting to use it. In any case where you know
you need exactly two things, they have names or meanings. "first" and "second"
are not good member names.

Therefore, the problem with std::pair is that there are ZERO valid use-cases
calling for its use where there isn't a better solution available. Examples of
better solutions:
std::to_chars_result - https://en.cppreference.com/w/cpp/utility/to_chars
std::from_chars_result - https://en.cppreference.com/w/cpp/utility/from_chars

Thiago Macieira - thiago (AT) macieira.info - thiago (AT) kde.org
   Software Architect - Intel DPG Cloud Engineering

Received on 2022-07-22 18:37:10