exercise-3-6.hpp

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// ===-- chapter-3/exercise-3-6.hpp ----------------------- -*- C++ -*- --=== //
#ifndef EXERCISE_3_6
#define EXERCISE_3_6
 
#include <boost/mpl/apply.hpp>
 
 
namespace exercise_3_6 {
 
struct twice_lambda
{
    template <typename F, typename X>
    struct apply
        : boost::mpl::apply<F, typename boost::mpl::apply<F, X>::type> { };
};
 
} // namespace exercise_3_6
 
#endif // EXERCISE_3_6