[boost] Re: is_class

From: Dave Gomboc (dave_at_[hidden])
Date: 2003-02-16 23:29:38

> So you would prefer
> 
> #if BOOST_WORKAROUND(__HP_aCC, <= 33900)
>     template<bool cond, typename T> struct enable_if;
> #elif BOOST_WORKAROUND(__VisualAge, <= 12345) // Dummy values
>     template<bool, typename T> struct enable_if;
> #else
>     template<bool, typename> struct enable_if;
> #endif
> 
> over
> 
> template<bool cond, typename T> struct enable_if;
> 
> If that is the case, then we disagree. Do you have any reason to prefer
> the first version?

No, I would prefer

#if BOOST_WORKAROUND(__HP_aCC, <=33900) || BOOST_WORKAROUND(__VisualAge, 
<=12345)
    template <bool cond, typename T> struct enable_if;
#else
    template <bool, typename> struct enable_if;
#endif

I already explained the reason: C++ compiler vendors use Boost with
BOOST_NO_CONFIG for conformance testing.  I'd rather see broken compilers
get fixed than developers forever spending time finding workarounds.

Dave