Re: [boost] [scope] scope_fail is unimplementable

On 4/14/23 09:39, Andrzej Krzemienski wrote:

niedz., 9 kwi 2023 o 03:11 Andrey Semashev via Boost mailto:boost@lists.boost.org> napisał(a):

Yes, you can manually (de)activate the guard in small and contained cases, but in general I would very much prefer it to work automatically. Otherwise, it quickly becomes a maintenance nightmare that it was supposed to fix.

True. Therefore in my code I would contain the code that requires a guard. (In general, I prefer RAII.) But even contained cases need a scope guard.

So, the trade-off is this: scope_fail:   - requires no manual deactivate

scope_guard with deactivate():   - works uniformly and unsurprisingly in all contexts, including coroutines   - is fast.

I would recommend that this trade-off is documented.

Yes, that makes sense. I will update the docs.