projects / ceph.git / blame
| Commit | Line | Data |
|---|---|---|
| b32b8144 | 1 | // Copyright Louis Dionne 2013-2017 |
| 7c673cae FG |
2 | // Distributed under the Boost Software License, Version 1.0. |
| 3 | // (See accompanying file LICENSE.md or copy at http://boost.org/LICENSE_1_0.txt) | |
| 4 | ||
| 5 | #ifndef BOOST_HANA_TEST_LAWS_MONOID_HPP | |
| 6 | #define BOOST_HANA_TEST_LAWS_MONOID_HPP | |
| 7 | ||
| 8 | #include <boost/hana/assert.hpp> | |
| 9 | #include <boost/hana/bool.hpp> | |
| 10 | #include <boost/hana/concept/comparable.hpp> | |
| 11 | #include <boost/hana/core/when.hpp> | |
| 12 | #include <boost/hana/functional/capture.hpp> | |
| 13 | #include <boost/hana/lazy.hpp> | |
| 14 | #include <boost/hana/concept/monoid.hpp> | |
| 15 | ||
| 16 | #include <laws/base.hpp> | |
| 17 | ||
| 18 | ||
| 19 | namespace boost { namespace hana { namespace test { | |
| 20 | template <typename M, typename = when<true>> | |
| 21 | struct TestMonoid : TestMonoid<M, laws> { | |
| 22 | using TestMonoid<M, laws>::TestMonoid; | |
| 23 | }; | |
| 24 | ||
| 25 | template <typename M> | |
| 26 | struct TestMonoid<M, laws> { | |
| 27 | template <typename Xs> | |
| 28 | TestMonoid(Xs xs) { | |
| 29 | hana::for_each(xs, hana::capture(xs)([](auto xs, auto a) { | |
| b32b8144 | 30 | static_assert(Monoid<decltype(a)>{}, ""); |
| 7c673cae FG |
31 | |
| 32 | // left identity | |
| 33 | BOOST_HANA_CHECK(hana::equal( | |
| 34 | hana::plus(zero<M>(), a), | |
| 35 | a | |
| 36 | )); | |
| 37 | ||
| 38 | // right identity | |
| 39 | BOOST_HANA_CHECK(hana::equal( | |
| 40 | hana::plus(a, zero<M>()), | |
| 41 | a | |
| 42 | )); | |
| 43 | ||
| 44 | hana::for_each(xs, | |
| 45 | hana::capture(xs, a)([](auto xs, auto a, auto b) { | |
| 46 | hana::for_each(xs, | |
| 47 | hana::capture(a, b)([](auto a, auto b, auto c) { | |
| 48 | // associativity | |
| 49 | BOOST_HANA_CHECK(equal( | |
| 50 | hana::plus(a, hana::plus(b, c)), | |
| 51 | hana::plus(hana::plus(a, b), c) | |
| 52 | )); | |
| 53 | })); | |
| 54 | })); | |
| 55 | ||
| 56 | })); | |
| 57 | } | |
| 58 | }; | |
| 59 | ||
| 60 | template <typename C> | |
| 61 | struct TestMonoid<C, when<Constant<C>::value>> | |
| 62 | : TestMonoid<C, laws> | |
| 63 | { | |
| 64 | template <typename Xs> | |
| 65 | TestMonoid(Xs xs) : TestMonoid<C, laws>{xs} { | |
| 66 | ||
| 67 | BOOST_HANA_CHECK(hana::equal( | |
| 68 | hana::value(zero<C>()), | |
| 69 | zero<typename C::value_type>() | |
| 70 | )); | |
| 71 | ||
| 72 | foreach2(xs, [](auto x, auto y) { | |
| 73 | BOOST_HANA_CHECK(hana::equal( | |
| 74 | hana::plus(hana::value(x), hana::value(y)), | |
| 75 | hana::value(hana::plus(x, y)) | |
| 76 | )); | |
| 77 | }); | |
| 78 | } | |
| 79 | }; | |
| 80 | }}} // end namespace boost::hana::test | |
| 81 | ||
| 82 | #endif // !BOOST_HANA_TEST_LAWS_MONOID_HPP |