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55 lines
2.1 KiB
C++
55 lines
2.1 KiB
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/list.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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using namespace boost::hana;
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template <int ...i>
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BOOST_HANA_CONSTEXPR_LAMBDA auto ilist = list_c<int, i...>;
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BOOST_HANA_CONSTEXPR_LAMBDA auto plus = [](auto x, auto y) { return x + y; };
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BOOST_HANA_CONSTEXPR_LAMBDA auto inc = [](auto x) { return x + int_<1>; };
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int main() {
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BOOST_HANA_STATIC_ASSERT(zip_with(inc) == list());
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BOOST_HANA_STATIC_ASSERT(zip_with(plus) == list());
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BOOST_HANA_STATIC_ASSERT(zip_with(inc, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(inc, ilist<0>) == ilist<1>);
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BOOST_HANA_STATIC_ASSERT(zip_with(inc, ilist<0, 1>) == ilist<1, 2>);
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BOOST_HANA_STATIC_ASSERT(zip_with(inc, ilist<0, 1, 2>) == ilist<1, 2, 3>);
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BOOST_HANA_STATIC_ASSERT(zip_with(inc, ilist<>, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<>, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<1>, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<>, ilist<3>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<1>, ilist<3>) == ilist<1 + 3>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<1, 2>, ilist<3, 4>) == ilist<1 + 3, 2 + 4>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<1, 2, 3, 4>, ilist<5, 6, 7>) == ilist<1 + 5, 2 + 6, 3 + 7>);
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BOOST_HANA_STATIC_ASSERT(zip_with(plus, ilist<>, ilist<>, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(
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zip_with(list,
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list('1', '2', '3', '4'),
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list("1", "2", "3"),
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list(1, 2, 3, 4),
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list(list(), list(list()), list(list(list())))
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)
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==
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list(
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list('1', "1", 1, list()),
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list('2', "2", 2, list(list())),
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list('3', "3", 3, list(list(list())))
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)
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);
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}
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