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hana/example/foldable/unpack_idiom.cpp
2014-08-05 10:37:54 -04:00

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708 B
C++

/*
@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/detail/assert.hpp>
#include <boost/hana/detail/constexpr.hpp>
#include <boost/hana/functional.hpp>
#include <boost/hana/list/instance.hpp>
using namespace boost::hana;
int main() {
//! [main]
BOOST_HANA_CONSTEXPR_LAMBDA auto add = [](auto x, auto y) {
return x + y;
};
// Would be `boost::fusion::make_fused(add)` in Boost.Fusion.
BOOST_HANA_CONSTEXPR_LAMBDA auto add_seq = partial(unpack, add);
BOOST_HANA_CONSTEXPR_ASSERT(add_seq(list(1, 2)) == add(1, 2));
//! [main]
}