template<
      typename Sequence
    , typename Pred
    >
struct[count\_if](./count-if.html){
    typedef_unspecified_type;
};

#include <[boost/mpl/count\_if.hpp](../../../../boost/mpl/count_if.hpp)>

typedef[count\_if](./count-if.html)<s,pred>::type n;

typedef[lambda](./lambda.html)<pred>::type p;
typedef[fold](./fold.html)<
      s
    ,[long\_](./long.html)<0>
    ,[if\_](./if.html)<[apply\_wrap](./apply-wrap.html)1<p,[\_2](./placeholders.html)>,[next](./next.html)<[\_1](./placeholders.html)>,[\_1](./placeholders.html)>
    >::type n;

typedef[vector](./vector.html)<int,char,long,short,char,long,double,long> types;[BOOST\_MPL\_ASSERT\_RELATION](./assert-relation.html)( ([count\_if](./count-if.html)< types, is_float<_> >::value), ==, 1 );[BOOST\_MPL\_ASSERT\_RELATION](./assert-relation.html)( ([count\_if](./count-if.html)< types, is_same<_,char> >::value), ==, 2 );[BOOST\_MPL\_ASSERT\_RELATION](./assert-relation.html)( ([count\_if](./count-if.html)< types, is_same<_,void> >::value), ==, 0 );