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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/adjust_if.hpp>
- #include <boost/hana/ap.hpp>
- #include <boost/hana/assert.hpp>
- #include <boost/hana/chain.hpp>
- #include <boost/hana/equal.hpp>
- #include <boost/hana/fill.hpp>
- #include <boost/hana/functional/always.hpp>
- #include <boost/hana/functional/compose.hpp>
- #include <boost/hana/lift.hpp>
- #include <boost/hana/replace_if.hpp>
- #include <boost/hana/tap.hpp>
- #include <boost/hana/then.hpp>
- #include <boost/hana/transform.hpp>
- #include <boost/hana/tuple.hpp>
- #include <laws/applicative.hpp>
- #include <laws/base.hpp>
- #include <laws/functor.hpp>
- #include <laws/monad.hpp>
- #include <support/cnumeric.hpp>
- #include <support/identity.hpp>
- namespace hana = boost::hana;
- using hana::test::ct_eq;
- int main() {
- hana::test::_injection<0> f{};
- // Functor
- {
- auto functor = ::identity;
- // adjust_if
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::adjust_if(functor(ct_eq<0>{}), hana::always(cnumeric<bool, true>), f),
- functor(f(ct_eq<0>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::adjust_if(functor(ct_eq<0>{}), hana::always(cnumeric<bool, false>), f),
- functor(ct_eq<0>{})
- ));
- }
- // fill
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::fill(functor(ct_eq<0>{}), ct_eq<1>{}),
- functor(ct_eq<1>{})
- ));
- }
- // transform
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::transform(functor(ct_eq<0>{}), f),
- functor(f(ct_eq<0>{}))
- ));
- }
- // replace_if
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::replace_if(functor(ct_eq<0>{}), hana::always(cnumeric<bool, true>), ct_eq<1>{}),
- functor(ct_eq<1>{})
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::replace_if(functor(ct_eq<0>{}), hana::always(cnumeric<bool, false>), ct_eq<1>{}),
- functor(ct_eq<0>{})
- ));
- }
- }
- // Applicative
- {
- auto a = ::identity;
- using A = ::Identity;
- // ap
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::ap(a(f), a(ct_eq<0>{})),
- a(f(ct_eq<0>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::ap(a(f), a(ct_eq<0>{}), a(ct_eq<1>{})),
- a(f(ct_eq<0>{}, ct_eq<1>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::ap(a(f), a(ct_eq<0>{}), a(ct_eq<1>{}), a(ct_eq<2>{})),
- a(f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}))
- ));
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::ap(a(f), a(ct_eq<0>{}), a(ct_eq<1>{}), a(ct_eq<2>{}), a(ct_eq<3>{})),
- a(f(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{}, ct_eq<3>{}))
- ));
- }
- // lift
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::lift<A>(ct_eq<0>{}),
- a(ct_eq<0>{})
- ));
- }
- }
- // Monad
- {
- auto monad = ::identity;
- using M = ::Identity;
- auto f = hana::compose(monad, hana::test::_injection<0>{});
- // chain
- {
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::chain(monad(ct_eq<1>{}), f),
- f(ct_eq<1>{})
- ));
- }
- // tap
- {
- bool executed = false;
- auto exec = [&](auto) { executed = true; };
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::chain(monad(ct_eq<0>{}), hana::tap<M>(exec)),
- monad(ct_eq<0>{})
- ));
- BOOST_HANA_RUNTIME_CHECK(executed);
- }
- // then
- {
- struct invalid { };
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::then(monad(invalid{}), monad(ct_eq<0>{})),
- monad(ct_eq<0>{})
- ));
- }
- }
- }
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