[boost] Re: mpl apply_if.hpp question

From: Larry Evans (cppljevans_at_[hidden])
Date: 2004-10-13 13:47:26

On 10/13/2004 08:40 AM, Larry Evans wrote:
> On 10/12/2004 10:23 PM, Larry Evans wrote:
[snip]
> FWIW, the como -E compile command produces this output:
> 
> <-----------------
> namespace boost { namespace mpl {
> 
> template<
>       typename C = na
>     , typename F1 = na
>     , typename F2 = na
>     >
> struct eval_if
> 
>     : if_<C,F1,F2>::type
> {
> 
> 
> 
> 
> 
> 
> };
> 
> ...
>  >-----------------

That's probably not the problem, because with this input:

<-------------
#include <boost/mpl/eval_if.hpp>
struct A{};
struct B{};
struct C{};
typedef boost::mpl::eval_if<A,B,C>::type X;
X x;
 >-------------

compilation succeeds.