hana/test/experimental/view/transformed/drop_front.cpp
2017-01-07 14:14:18 -08:00

99 lines
3.4 KiB
C++

// 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/drop_front.hpp>
#include <boost/hana/equal.hpp>
#include <boost/hana/experimental/view.hpp>
#include <boost/hana/integral_constant.hpp>
#include <laws/base.hpp>
#include <support/seq.hpp>
namespace hana = boost::hana;
using hana::test::ct_eq;
int main() {
auto container = ::seq;
auto f = hana::test::_injection<0>{};
{
auto storage = container();
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<0>),
container()
));
}
{
auto storage = container(ct_eq<0>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<0>),
container(f(ct_eq<0>{}))
));
}{
auto storage = container(ct_eq<0>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<1>),
container()
));
}
{
auto storage = container(ct_eq<0>{}, ct_eq<1>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<0>),
container(f(ct_eq<0>{}), f(ct_eq<1>{}))
));
}{
auto storage = container(ct_eq<0>{}, ct_eq<1>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<1>),
container(f(ct_eq<1>{}))
));
}{
auto storage = container(ct_eq<0>{}, ct_eq<1>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<2>),
container()
));
}
{
auto storage = container(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<0>),
container(f(ct_eq<0>{}), f(ct_eq<1>{}), f(ct_eq<2>{}))
));
}{
auto storage = container(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<1>),
container(f(ct_eq<1>{}), f(ct_eq<2>{}))
));
}{
auto storage = container(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<2>),
container(f(ct_eq<2>{}))
));
}{
auto storage = container(ct_eq<0>{}, ct_eq<1>{}, ct_eq<2>{});
auto transformed = hana::experimental::transformed(storage, f);
BOOST_HANA_CONSTANT_CHECK(hana::equal(
hana::drop_front(transformed, hana::size_c<3>),
container()
));
}
}