Re: [boost] [scope] Scope review starts on November 26th

On 11/30/23 19:02, Peter Dimov via Boost wrote:

Andrey Semashev wrote:

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I think a similar utility would be more useful in form of a class template, for example:

resource windows_handle; resource sdl_window_handle;

That's

template class resource;

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This would also prohibit resource types with non-constexpr constructors, as well as non-default-constructible resources. I don't like this tradeoff.

It doesn't. The two operations required from R are construction from Def and comparing to Def.

https://godbolt.org/z/h7z3qGzvs

Note that the type of Def doesn't have to be R.

What I meant is something like this won't work: https://godbolt.org/z/hczoP4WMx And if you're suggesting to define some magic placeholder type that can be used as Def and automatically converts to R then that looks like a more contrived usage to me than just defining resource traits.