Synopsis

template<
      typename Sequence
    , typename T
    >
struct contains
{
    typedef unspecified type;
};

Description

Returns a true-valued Integral Constant if one or more elements in Sequence are identical to T.

Header

#include <boost/mpl/contains.hpp>

Parameters

Expression semantics

For any Forward Sequence s and arbitrary type t:

typedef contains::type r;

typedef not_< is_same<
      find::type
    , end::type
    > >::type r;

Complexity

Linear. At most size::value comparisons for identity.