Re: [boost] Anyone have access to Sun Studio 12 compiler?

Subject: Re: [boost] Anyone have access to Sun Studio 12 compiler?
From: Lars Viklund (zao_at_[hidden])
Date: 2010-10-21 12:12:25

On Thu, Oct 21, 2010 at 07:49:29AM -0400, David Abrahams wrote:
> At Wed, 20 Oct 2010 12:08:28 -0700,
> Marshall Clow wrote:
> > 
> > Yeah - it's complaining about a method in boost::array:
> > 
> >     // Specific for boost::array: simply returns its elems data member.
> >     template <typename T, std::size_t N>
> >     T(&get_c_array(boost::array<T,N>& arg))[N]
> >     {
> >         return arg.elems;
> >     }
> 
> My guess is it can't parse the function-returning-reference-to-array
> syntax.  You can try this instead:
> 
>     namespace detail
>     {
>         template <typename T, std::size_t N> struct c_array
>         {
>             typedef T[N] type;
>         };
>     }
> 
>     // Specific for boost::array: simply returns its elems data member.
>     template <typename T, std::size_t N>
>     typename detail::c_array<T,N>::type& get_c_array(boost::array<T,N>& arg)
>     {
>         return arg.elems;
>     }

That code, together with the corresponding const variant [1] of the second
function, makes building --with-math get past the previous trouble spots
without problems.

As this machine is horribly slow, I haven't finished building yet, but
it seems to fix the problem the reporter reported in his report.

[1]
---8<---
// Specific for boost::array: simply returns its elems data member.
template <typename T, std::size_t N>
const typename detail::c_array<T,N>::type& get_c_array(const boost::array<T,N>& arg)
{
    return arg.elems;
}
---8<---

-- 
Lars Viklund | zao_at_[hidden]