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)
5 #include <boost/hana/assert.hpp>
6 #include <boost/hana/config.hpp>
7 #include <boost/hana/functional/compose.hpp>
8 namespace hana
= boost::hana
;
12 BOOST_HANA_CONSTEXPR_LAMBDA
auto to_char
= [](int x
) {
13 return static_cast<char>(x
+ 48);
16 BOOST_HANA_CONSTEXPR_LAMBDA
auto increment
= [](auto x
) {
20 BOOST_HANA_CONSTEXPR_CHECK(hana::compose(to_char
, increment
)(3) == '4');