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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/test/experimental/view/joined/is_empty.cpp | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/experimental/view/joined/is_empty.cpp b/src/boost/libs/hana/test/experimental/view/joined/is_empty.cpp new file mode 100644 index 000000000..b8a5e0ae5 --- /dev/null +++ b/src/boost/libs/hana/test/experimental/view/joined/is_empty.cpp @@ -0,0 +1,43 @@ +// 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/experimental/view.hpp> +#include <boost/hana/is_empty.hpp> +#include <boost/hana/not.hpp> + +#include <support/seq.hpp> +namespace hana = boost::hana; + + +template <int> struct undefined { }; + +int main() { + auto container = ::seq; + + { + auto storage1 = container(); + auto storage2 = container(); + auto joined = hana::experimental::joined(storage1, storage2); + BOOST_HANA_CONSTANT_CHECK(hana::is_empty(joined)); + } + { + auto storage1 = container(undefined<0>{}); + auto storage2 = container(); + auto joined = hana::experimental::joined(storage1, storage2); + BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined))); + } + { + auto storage1 = container(undefined<0>{}); + auto storage2 = container(undefined<1>{}); + auto joined = hana::experimental::joined(storage1, storage2); + BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined))); + } + { + auto storage1 = container(); + auto storage2 = container(undefined<0>{}); + auto joined = hana::experimental::joined(storage1, storage2); + BOOST_HANA_CONSTANT_CHECK(hana::not_(hana::is_empty(joined))); + } +} |