Re: [boost] [type_traits][multi_index][msvc-7.1] problems with is_const in VC 7.1

15 Oct 2015


      Ion Gaztañaga  writes:
...
On 15/10/2015 13:22, Joaquin M LópezMuñoz wrote:
...
Boost.MultiIndex is failing at master for VC 7.1:
[...]
template<class Type>
struct identity:
   mpl::if_c<
     is_const<Type>::value,
     detail::const_identity_base<Type>,
     detail::non_const_identity_base<Type>
...
::type
{
};
Sometimes MSVC-7.1 seems to be happier with a bit more flattened 
template instantiation chain. Maybe if you SFINAE it with partial 
specialization of identity it will work.
Another option is to use if_<> instead of if_c. It could make
MSVC happier.
Won't you have direct access to a local MSVC 7.1 installation to play
with prior to commiting any changes to github? The if_ thing in
particular seems inoffensive enough to try out.

Joaquín M López Muñoz
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