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47 lines
1.7 KiB
C++
47 lines
1.7 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/functional.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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using namespace boost::hana;
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BOOST_HANA_CONSTEXPR_LAMBDA auto f = [](auto ...xs) {
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return sizeof...(xs);
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};
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int main() {
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BOOST_HANA_STATIC_ASSERT(curry<0>(f)() == f());
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BOOST_HANA_STATIC_ASSERT(curry<1>(f)(1) == f(1));
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BOOST_HANA_STATIC_ASSERT(curry<2>(f)(1)('2') == f(1, '2'));
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BOOST_HANA_STATIC_ASSERT(curry<2>(f)(1, '2') == f(1, '2'));
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BOOST_HANA_STATIC_ASSERT(curry<3>(f)(1)('2')(3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(f)(1)('2', 3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(f)(1, '2')(3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(f)(1, '2', 3.3) == f(1, '2', 3.3));
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// Make sure curry is idempotent; this is important because it allows
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// currying a function in generic contexts where it is unknown whether
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// the function is already curried.
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BOOST_HANA_STATIC_ASSERT(curry<0>(curry<0>(f))() == f());
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BOOST_HANA_STATIC_ASSERT(curry<1>(curry<1>(f))(1) == f(1));
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BOOST_HANA_STATIC_ASSERT(curry<2>(curry<2>(f))(1)('2') == f(1, '2'));
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BOOST_HANA_STATIC_ASSERT(curry<2>(curry<2>(f))(1, '2') == f(1, '2'));
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BOOST_HANA_STATIC_ASSERT(curry<3>(curry<3>(f))(1)('2')(3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(curry<3>(f))(1)('2', 3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(curry<3>(f))(1, '2')(3.3) == f(1, '2', 3.3));
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BOOST_HANA_STATIC_ASSERT(curry<3>(curry<3>(f))(1, '2', 3.3) == f(1, '2', 3.3));
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}
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