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54 lines
1.4 KiB
C++
54 lines
1.4 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/detail/assert.hpp>
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#include <boost/hana/detail/constexpr.hpp>
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#include <boost/hana/list/instance.hpp>
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#include <boost/hana/range.hpp>
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#include <boost/hana/type_list.hpp>
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using namespace boost::hana;
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int main() {
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//! [comparing]
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BOOST_HANA_CONSTEXPR_LAMBDA auto grouped = group_by(comparing(length), list(
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list(1, 2, 3),
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list('x', 'y', 'z'),
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range_c<long, 0, 1>,
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type_list<char, int>,
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range_c<int, 0, 2>,
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list(123.4, nullptr)
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));
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BOOST_HANA_CONSTEXPR_ASSERT(grouped == list(
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list(
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list(1, 2, 3),
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list('x', 'y', 'z')
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),
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list(
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range_c<long, 0, 1>
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),
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list(
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type_list<char, int>,
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range_c<int, 0, 2>,
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list(123.4, nullptr)
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)
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));
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//! [comparing]
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//! [equal]
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BOOST_HANA_CONSTEXPR_ASSERT(equal(list(1, 2), list(1, 2)));
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BOOST_HANA_CONSTEXPR_ASSERT(!equal('x', 'y'));
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BOOST_HANA_CONSTANT_ASSERT(!equal(list(1, 2), 'y'));
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//! [equal]
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//! [not_equal]
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BOOST_HANA_CONSTEXPR_ASSERT(not_equal(list(1, 2), list(3)));
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BOOST_HANA_CONSTEXPR_ASSERT(not_equal('x', 'y'));
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BOOST_HANA_CONSTANT_ASSERT(not_equal(list(1, 2), 'y'));
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//! [not_equal]
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}
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