hana/example/optional/functor.cpp
2017-01-07 14:14:18 -08:00

17 lines
584 B
C++

// 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/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() { }