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29 lines
736 B
C++
29 lines
736 B
C++
/*
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@copyright Louis Dionne 2014
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Distributed under the Boost Software License, Version 1.0.
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(See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
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*/
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#include <boost/hana/maybe.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/detail/static_assert.hpp>
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#include <boost/hana/integral.hpp>
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#include <tuple>
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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto ...x) {
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return std::make_tuple(x...);
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};
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BOOST_HANA_CONSTEXPR_LAMBDA auto lf = [](auto ...x) {
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return f(x()...);
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};
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int main() {
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BOOST_HANA_STATIC_ASSERT(lazy_foldr(lf, int_<0>, nothing) == int_<0>);
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BOOST_HANA_STATIC_ASSERT(lazy_foldr(lf, int_<0>, just(int_<1>)) == f(int_<1>, int_<0>));
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}
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