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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/equal.hpp>
- #include <boost/hana/experimental/view.hpp>
- #include <boost/hana/integral_constant.hpp>
- #include <boost/hana/length.hpp>
- #include <support/seq.hpp>
- namespace hana = boost::hana;
- template <int> struct undefined { };
- int main() {
- auto container = ::seq;
- {
- auto storage = container();
- auto transformed = hana::experimental::transformed(storage, undefined<99>{});
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::length(transformed),
- hana::size_c<0>
- ));
- }{
- auto storage = container(undefined<0>{});
- auto transformed = hana::experimental::transformed(storage, undefined<99>{});
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::length(transformed),
- hana::size_c<1>
- ));
- }{
- auto storage = container(undefined<0>{}, undefined<1>{});
- auto transformed = hana::experimental::transformed(storage, undefined<99>{});
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::length(transformed),
- hana::size_c<2>
- ));
- }{
- auto storage = container(undefined<0>{}, undefined<1>{}, undefined<2>{});
- auto transformed = hana::experimental::transformed(storage, undefined<99>{});
- BOOST_HANA_CONSTANT_CHECK(hana::equal(
- hana::length(transformed),
- hana::size_c<3>
- ));
- }
- }
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