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From: Michael S <already5chosen@yahoo.com>
Newsgroups: comp.lang.c
Subject: Re: do { quit; } else { }
Date: Sun, 6 Apr 2025 10:52:16 +0300
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On Sat, 05 Apr 2025 16:10:36 GMT
scott@slp53.sl.home (Scott Lurndal) wrote:

> Janis Papanagnou <janis_papanagnou+ng@hotmail.com> writes:
> >On 05.04.2025 16:54, Scott Lurndal wrote:  
> >> Kaz Kylheku <643-408-1753@kylheku.com> writes:  
> >>> On 2025-04-04, Thiago Adams <thiago.adams@gmail.com> wrote:  
> >>>>    What do you think of this control block?
> >>>> [...]  
> >> 
> >> I don't believe C++ exceptions are useful in this case, either,
> >> and I avoid using them for general purpose error handling.  
> >
> >I'd have wished that they were available back then when we
> >started using C++ regularly in the early 1990's.  
> 
> I was using C++ (cfront 2.1) for operating system code in 1990.
> 
> We couldn't have used exceptions even when they were introduced
> in cfront 3 for that project.
> 
> I strongly believe errors must be handled immediately when
> detected, rather than deferring to some nebulous code a long
> way in both space and time from the actual error.
> 
> The only use I see for C++ exceptions is a cleaner
> sigsetjmp/siglongjmp, and even then I've used
> the later when the former is available. As an
> experiment, I once replaced the sigsetjmp/siglongjmp
> calls with C++ exceptions and found that using exceptions
> reduced application performance by a double-digit percentage
> for that particular applications (processor simulator).

If you believe in non-trivial constructors (i.e. constructors that can
fail) then you have to believe in exceptions as well.
Personally, I don't believe in either.
But then, I don't believe that C++ is suitable for for operating system
code...