ceph/src/boost/libs/mpl/include/boost/mpl/aux_/preprocessed/gcc/template_arity.hpp

   1
   2 // Copyright Aleksey Gurtovoy 2001-2004
   3 //
   4 // Distributed under the Boost Software License, Version 1.0.
   5 // (See accompanying file LICENSE_1_0.txt or copy at
   6 // http://www.boost.org/LICENSE_1_0.txt)
   7 //
   8
   9 // *Preprocessed* version of the main "template_arity.hpp" header
  10 // -- DO NOT modify by hand!
  11
  12 namespace boost { namespace mpl { namespace aux {
  13 template< int N > struct arity_tag
  14 {
  15     typedef char (&type)[N + 1];
  16 };
  17
  18 template<
  19       int C1, int C2, int C3, int C4, int C5, int C6
  20     >
  21 struct max_arity
  22 {
  23     BOOST_STATIC_CONSTANT(int, value =
  24           ( C6 > 0 ? C6 : ( C5 > 0 ? C5 : ( C4 > 0 ? C4 : ( C3 > 0 ? C3 : ( C2 > 0 ? C2 : ( C1 > 0 ? C1 : -1 ) ) ) ) ) )
  25         );
  26 };
  27
  28 arity_tag<0>::type arity_helper(...);
  29
  30 template<
  31       template< typename P1 > class F
  32     , typename T1
  33     >
  34 typename arity_tag<1>::type
  35 arity_helper(type_wrapper< F<T1> >, arity_tag<1>);
  36
  37 template<
  38       template< typename P1, typename P2 > class F
  39     , typename T1, typename T2
  40     >
  41 typename arity_tag<2>::type
  42 arity_helper(type_wrapper< F< T1,T2 > >, arity_tag<2>);
  43
  44 template<
  45       template< typename P1, typename P2, typename P3 > class F
  46     , typename T1, typename T2, typename T3
  47     >
  48 typename arity_tag<3>::type
  49 arity_helper(type_wrapper< F< T1,T2,T3 > >, arity_tag<3>);
  50
  51 template<
  52       template< typename P1, typename P2, typename P3, typename P4 > class F
  53     , typename T1, typename T2, typename T3, typename T4
  54     >
  55 typename arity_tag<4>::type
  56 arity_helper(type_wrapper< F< T1,T2,T3,T4 > >, arity_tag<4>);
  57
  58 template<
  59       template<
  60           typename P1, typename P2, typename P3, typename P4
  61         , typename P5
  62         >
  63       class F
  64     , typename T1, typename T2, typename T3, typename T4, typename T5
  65     >
  66 typename arity_tag<5>::type
  67 arity_helper(type_wrapper< F< T1,T2,T3,T4,T5 > >, arity_tag<5>);
  68
  69 template<
  70       template<
  71           typename P1, typename P2, typename P3, typename P4
  72         , typename P5, typename P6
  73         >
  74       class F
  75     , typename T1, typename T2, typename T3, typename T4, typename T5
  76     , typename T6
  77     >
  78 typename arity_tag<6>::type
  79 arity_helper(type_wrapper< F< T1,T2,T3,T4,T5,T6 > >, arity_tag<6>);
  80 template< typename F, int N >
  81 struct template_arity_impl
  82 {
  83     BOOST_STATIC_CONSTANT(int, value =
  84           sizeof(::boost::mpl::aux::arity_helper(type_wrapper<F>(), arity_tag<N>())) - 1
  85         );
  86 };
  87
  88 template< typename F >
  89 struct template_arity
  90 {
  91     BOOST_STATIC_CONSTANT(int, value  = (
  92           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, template_arity_impl< F,6 >::value >::value
  93         ));
  94     typedef mpl::int_<value> type;
  95 };
  96
  97 }}}