diff options
Diffstat (limited to 'src/boost/libs/hana/test/optional/maybe.cpp')
-rw-r--r-- | src/boost/libs/hana/test/optional/maybe.cpp | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/src/boost/libs/hana/test/optional/maybe.cpp b/src/boost/libs/hana/test/optional/maybe.cpp new file mode 100644 index 000000000..ca3d154e0 --- /dev/null +++ b/src/boost/libs/hana/test/optional/maybe.cpp @@ -0,0 +1,28 @@ +// 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/optional.hpp> + +#include <laws/base.hpp> +namespace hana = boost::hana; + + +struct undefined { }; + +int main() { + hana::test::_injection<0> f{}; + hana::test::ct_eq<2> x{}; + + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::maybe(x, undefined{}, hana::nothing), + x + )); + + BOOST_HANA_CONSTANT_CHECK(hana::equal( + hana::maybe(undefined{}, f, hana::just(x)), + f(x) + )); +} |