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27 lines
735 B
C++
27 lines
735 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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using namespace boost::hana;
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template <int i>
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constexpr auto x = int_<i>;
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BOOST_HANA_CONSTEXPR_LAMBDA auto is = [](auto x) {
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return [=](auto y) { return equal(x, y); };
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};
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int main() {
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BOOST_HANA_STATIC_ASSERT(find(is(x<0>), just(x<0>)) == just(x<0>));
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BOOST_HANA_STATIC_ASSERT(find(is(x<1>), just(x<0>)) == nothing);
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BOOST_HANA_STATIC_ASSERT(find(is(x<0>), nothing) == nothing);
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}
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