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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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