// preprocessed version of 'boost/mpl/aux_/template_arity.hpp' header
// see the original for copyright information
namespace boost { namespace mpl { namespace aux {
template< int N > struct arity_tag
{
typedef char (&type)[N + 1];
};
template<
int C1, int C2, int C3, int C4, int C5
>
struct max_arity
{
static int const value =
( C5 > 0 ? C5 : ( C4 > 0 ? C4 : ( C3 > 0 ? C3 : ( C2 > 0 ? C2 : ( C1
> 0 ? C1 : -1 ) ) ) ) )
;
};
arity_tag<0> arity_helper(...);
template<
template< typename P1 > class F
, typename T1
>
typename arity_tag<1>::type
arity_helper(type_wrapper< F<T1> >,arity_tag<1 >);
template<
template< typename P1, typename P2 > class F
, typename T1, typename T2
>
typename arity_tag<2>::type
arity_helper(type_wrapper< F<T1,T2> >,arity_tag<2 >);
template<
template< typename P1, typename P2, typename P3 > class F
, typename T1, typename T2, typename T3
>
typename arity_tag<3>::type
arity_helper(type_wrapper< F<T1,T2,T3> >,arity_tag<3 >);
template<
template< typename P1, typename P2, typename P3, typename P4 > class F
, typename T1, typename T2, typename T3, typename T4
>
typename arity_tag<4>::type
arity_helper(type_wrapper< F<T1,T2,T3,T4> >,arity_tag<4 >);
template<
template<
typename P1, typename P2, typename P3, typename P4
, typename P5
>
class F
, typename T1, typename T2, typename T3, typename T4, typename T5
>
typename arity_tag<5>::type
arity_helper(type_wrapper< F<T1,T2,T3,T4,T5> >,arity_tag<5 >);
template< typename F, int N >
struct template_arity_impl
{
static int const value =
sizeof(arity_helper(type_wrapper<F>(),arity_tag<N>())) - 1
;
};
template< typename F >
struct template_arity
{
static int const value =
( max_arity< template_arity_impl<F,1 >::value, template_arity_impl<
F,2 >::value, template_arity_impl< F,3 >::value, template_arity_impl<
F,4 >::value, template_arity_impl< F,5 >::value >::value )
;
};
}}} // namespace boost::mpl::aux