1 // Copyright Louis Dionne 2013-2017 2 // Distributed under the Boost Software License, Version 1.0. 3 // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) 4 5 #ifndef BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_COMPARABLE_HPP 6 #define BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_COMPARABLE_HPP 7 8 #include "matrix.hpp" 9 10 #include <boost/hana/all.hpp> 11 #include <boost/hana/bool.hpp> 12 #include <boost/hana/equal.hpp> 13 #include <boost/hana/eval_if.hpp> 14 #include <boost/hana/zip_with.hpp> 15 16 17 namespace boost { namespace hana { 18 template <unsigned R1, unsigned C1, unsigned R2, unsigned C2> 19 struct equal_impl<cppcon::Matrix<R1, C1>, cppcon::Matrix<R2, C2>> { 20 template <typename M1, typename M2> applyboost::hana::equal_impl21 static constexpr auto apply(M1 const& m1, M2 const& m2) { 22 return eval_if(bool_c<R1 == R2 && C1 == C2>, 23 [&](auto _) { 24 return all(zip_with(_(equal), cppcon::rows(m1), 25 cppcon::rows(m2))); 26 }, 27 [] { return false_c; } 28 ); 29 } 30 }; 31 }} 32 33 #endif // !BOOST_HANA_EXAMPLE_CPPCON_2014_MATRIX_COMPARABLE_HPP 34