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- // Copyright Louis Dionne 2013-2017
- // Distributed under the Boost Software License, Version 1.0.
- // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
- #include <boost/hana/functional/placeholder.hpp>
- namespace hana = boost::hana;
- constexpr auto plus = hana::_ + hana::_;
- static_assert(plus(1, 2) == 1 + 2, "");
- constexpr auto increment = hana::_ + 1;
- static_assert(increment(1) == 2, "");
- constexpr auto twice = 2 * hana::_;
- static_assert(twice(1) == 2, "");
- // Extra arguments are ignored.
- static_assert(twice(1, "ignored") == 2, "");
- int main() { }
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