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34 lines
1.1 KiB
C++
34 lines
1.1 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
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* http://www.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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constexpr struct _odd {
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template <typename I>
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constexpr auto operator()(I i) const { return i % int_<2> != int_<0>; }
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} odd{};
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int main() {
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0, 2>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<0, 1, 3>) == ilist<>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 0, 3>) == ilist<1>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 3, 0>) == ilist<1, 3>);
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BOOST_HANA_STATIC_ASSERT(take_while(odd, ilist<1, 3, 0, 2>) == ilist<1, 3>);
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}
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