49 lines
1.5 KiB
C++
49 lines
1.5 KiB
C++
// Copyright Louis Dionne 2013-2017
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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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#include <boost/hana/assert.hpp>
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#include <boost/hana/concept/struct.hpp>
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#include <boost/hana/equal.hpp>
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#include <boost/hana/find_if.hpp>
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#include <boost/hana/integral_constant.hpp>
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#include <boost/hana/optional.hpp>
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#include "minimal_struct.hpp"
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#include <laws/base.hpp>
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namespace hana = boost::hana;
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using hana::test::ct_eq;
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template <int i = 0>
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struct undefined { };
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int main() {
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(), undefined<>{}),
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hana::nothing
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(ct_eq<0>{}), hana::equal.to(hana::int_c<0>)),
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hana::just(ct_eq<0>{})
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(undefined<1>{}), hana::equal.to(hana::int_c<1>)),
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hana::nothing
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(ct_eq<0>{}, ct_eq<1>{}), hana::equal.to(hana::int_c<0>)),
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hana::just(ct_eq<0>{})
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(ct_eq<0>{}, ct_eq<1>{}), hana::equal.to(hana::int_c<1>)),
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hana::just(ct_eq<1>{})
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));
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BOOST_HANA_CONSTANT_CHECK(hana::equal(
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hana::find_if(obj(undefined<0>{}, undefined<1>{}), hana::equal.to(hana::int_c<2>)),
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hana::nothing
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));
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}
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