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From: Melzzzzz <mel@zzzzz.com>
Newsgroups: comp.lang.c++
Subject: Re: This will work or not?
Date: Mon, 5 Sep 2016 13:36:50 +0200
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On Mon, 5 Sep 2016 11:34:05 +0000 (UTC)
Juha Nieminen <nospam@thanks.invalid> wrote:

> Melzzzzz <mel@zzzzz.com> wrote:
> > struct Problem{
> >         uint32_t a;
> >         uint32_t b;
> >         uint64_t c;
> >         uint32_t d;
> >         bool check_it() {
> >                 for (uint32_t* i = &a;i != &d; ++i)
> >                         if (*i>0) return true;
> >                 return false;
> >         }
> > 
> > };  
> 
> Rather than mess with implementation-defined and undefined behavior
> trickery, just redesign your struct better, in a manner that allows
> you to do what you want (ie. iterate through the member variables
> in a loop) without compromising code quality and standard conforming.
> 
> For example:
> 
> struct Problem
> {
>     std::uint32_t values[4];
> 
>     std::uint32_t a() const { return values[0]; }
>     void a(std::uint32_t v) { values[0] = v; }
>     // and same for b(), c() and d().
> };
> 
> Now you can safely iterate through the values in a loop.
> 
> --- news://freenews.netfront.net/ - complaints: news@netfront.net ---

What about uint64_t ? It's a big struct I just made it minimal to show
problem.