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// Copyright Louis Dionne 2013-2017
// Distributed under the Boost Software License, Version 1.0.
// (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt)
#include <boost/hana/assert.hpp>
#include <boost/hana/concept/orderable.hpp>
#include <boost/hana/greater.hpp>
#include <boost/hana/greater_equal.hpp>
#include <boost/hana/less.hpp>
#include <boost/hana/less_equal.hpp>
#include <boost/hana/max.hpp>
#include <boost/hana/min.hpp>
#include <boost/hana/not.hpp>
#include <boost/hana/tuple.hpp>
#include <laws/base.hpp>
#include <laws/comparable.hpp>
#include <laws/orderable.hpp>
#include <string>
#include <type_traits>
namespace hana = boost::hana;
using namespace std::literals;
// Minimal LessThanComparable types
struct ord1 { int value; };
struct ord2 {
int value;
constexpr operator ord1() const { return {value}; }
};
template <typename T, typename U, typename = std::enable_if_t<
(std::is_same<T, ord1>{} || std::is_same<T, ord2>{}) &&
(std::is_same<U, ord1>{} || std::is_same<U, ord2>{})
>>
constexpr bool operator<(T a, U b)
{ return a.value < b.value; }
namespace boost { namespace hana {
template <typename T, typename U>
struct equal_impl<T, U, when<
(std::is_same<T, ord1>{} || std::is_same<T, ord2>{}) &&
(std::is_same<U, ord1>{} || std::is_same<U, ord2>{})
>> {
static constexpr bool apply(T a, U b)
{ return a.value == b.value; }
};
}}
int main() {
// laws
hana::test::TestOrderable<int>{hana::make_tuple(0,1,2,3,4,5)};
hana::test::TestOrderable<unsigned int>{hana::make_tuple(0u,1u,2u,3u,4u,5u)};
hana::test::TestOrderable<long>{hana::make_tuple(0l,1l,2l,3l,4l,5l)};
hana::test::TestOrderable<unsigned long>{hana::make_tuple(0ul,1ul,2ul,3ul,4ul,5ul)};
hana::test::TestOrderable<ord1>{hana::make_tuple(ord1{0}, ord1{1}, ord1{2}, ord1{3}, ord1{4})};
// Orderable => Comparable
hana::test::TestComparable<ord1>{hana::make_tuple(ord1{0}, ord1{1}, ord1{2}, ord1{3}, ord1{4})};
// less
{
BOOST_HANA_CONSTEXPR_CHECK(hana::less(5, 6));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(6, 6)));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(7, 6)));
// Provided model for LessThanComparable types
BOOST_HANA_CONSTEXPR_CHECK(hana::less(ord1{0}, ord1{1}));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord1{0}, ord1{0})));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord1{1}, ord1{0})));
BOOST_HANA_CONSTEXPR_CHECK(hana::less(ord1{0}, ord2{1}));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord1{0}, ord2{0})));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord1{1}, ord2{0})));
BOOST_HANA_CONSTEXPR_CHECK(hana::less(ord2{0}, ord1{1}));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord2{0}, ord1{0})));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less(ord2{1}, ord1{0})));
BOOST_HANA_RUNTIME_CHECK(hana::less("ab", "abc"s));
BOOST_HANA_RUNTIME_CHECK(hana::less("abc"s, "abcde"));
}
// greater
{
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::greater(5, 6)));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::greater(6, 6)));
BOOST_HANA_CONSTEXPR_CHECK(hana::greater(7, 6));
BOOST_HANA_RUNTIME_CHECK(hana::greater("abcd", "ab"s));
BOOST_HANA_RUNTIME_CHECK(hana::greater("abc"s, "abb"));
}
// less_equal
{
BOOST_HANA_CONSTEXPR_CHECK(hana::less_equal(5, 6));
BOOST_HANA_CONSTEXPR_CHECK(hana::less_equal(6, 6));
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::less_equal(7, 6)));
BOOST_HANA_RUNTIME_CHECK(hana::less_equal("ab", "abcd"s));
BOOST_HANA_RUNTIME_CHECK(hana::less_equal("abc"s, "abc"));
}
// greater_equal
{
BOOST_HANA_CONSTEXPR_CHECK(hana::not_(hana::greater_equal(5, 6)));
BOOST_HANA_CONSTEXPR_CHECK(hana::greater_equal(6, 6));
BOOST_HANA_CONSTEXPR_CHECK(hana::greater_equal(7, 6));
BOOST_HANA_RUNTIME_CHECK(hana::greater_equal("abcd", "ab"s));
BOOST_HANA_RUNTIME_CHECK(hana::greater_equal("abc"s, "abc"));
}
// min
{
BOOST_HANA_CONSTEXPR_CHECK(hana::equal(hana::min(5, 6), 5));
BOOST_HANA_CONSTEXPR_CHECK(hana::equal(hana::min(6, 5), 5));
}
// max
{
BOOST_HANA_CONSTEXPR_CHECK(hana::equal(hana::max(5, 6), 6));
BOOST_HANA_CONSTEXPR_CHECK(hana::equal(hana::max(6, 5), 6));
}
}
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