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hana/example/cppcon_2014/matrix/functor.hpp

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/*
@copyright Louis Dionne 2014
Distributed under the Boost Software License, Version 1.0.
(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
*/
#ifndef BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_FUNCTOR_HPP
#define BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_FUNCTOR_HPP
#include "matrix.hpp"
#include <boost/hana/functional/flip.hpp>
#include <boost/hana/functional/partial.hpp>
#include <boost/hana/functor/fmap_mcd.hpp>
#include <utility>
namespace boost { namespace hana {
template <unsigned Rows, unsigned Columns>
struct Functor::instance<cppcon::Matrix<Rows, Columns>> : Functor::fmap_mcd {
template <typename M, typename F>
static constexpr decltype(auto) fmap_impl(M&& m, F&& f) {
return unpack(
fmap(
cppcon::rows(std::forward<M>(m)),
partial(flip(fmap), std::forward<F>(f))
),
cppcon::matrix
);
}
};
}}
#endif // !BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_FUNCTOR_HPP