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hana/example/optional/functor.cpp
2016-02-04 11:07:41 -05:00

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// Copyright Louis Dionne 2013-2016
// 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/assert.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/functional/placeholder.hpp>
#include <boost/hana/optional.hpp>
#include <boost/hana/transform.hpp>
namespace hana = boost::hana;
BOOST_HANA_CONSTANT_CHECK(hana::transform(hana::nothing, hana::_ + 1) == hana::nothing);
static_assert(hana::transform(hana::just(1), hana::_ + 1) == hana::just(2), "");
int main() { }