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hana/test/list/instance/functor/fmap.cpp

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/*
@copyright Louis Dionne 2014
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/list/instance.hpp>
#include <boost/hana/detail/constexpr.hpp>
#include <boost/hana/detail/static_assert.hpp>
#include <boost/hana/integral.hpp>
using namespace boost::hana;
BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto i) { return i + int_<1>; };
int main() {
BOOST_HANA_STATIC_ASSERT(fmap(f, list()) == list());
BOOST_HANA_STATIC_ASSERT(fmap(f, list(int_<1>)) == list(f(int_<1>)));
BOOST_HANA_STATIC_ASSERT(fmap(f, list(int_<1>, int_<2>)) == list(f(int_<1>), f(int_<2>)));
BOOST_HANA_STATIC_ASSERT(fmap(f, list(int_<1>, int_<2>, int_<3>)) == list(f(int_<1>), f(int_<2>), f(int_<3>)));
BOOST_HANA_STATIC_ASSERT(fmap(f, list(1, 2, 3)) == list(f(1), f(2), f(3)));
}