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Diffstat (limited to '')
-rw-r--r-- | src/boost/libs/hana/example/functional/flip.cpp | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/functional/flip.cpp b/src/boost/libs/hana/example/functional/flip.cpp new file mode 100644 index 000000000..9afb2bcad --- /dev/null +++ b/src/boost/libs/hana/example/functional/flip.cpp @@ -0,0 +1,21 @@ +// 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/config.hpp> +#include <boost/hana/functional/flip.hpp> +namespace hana = boost::hana; + + +BOOST_HANA_CONSTEXPR_LAMBDA auto minus = [](int x, int y, int z = 0) { + return x - y - z; +}; + +int main() { + BOOST_HANA_CONSTEXPR_CHECK(minus(3, 0) == 3 - 0); + BOOST_HANA_CONSTEXPR_CHECK(hana::flip(minus)(3, 0) == 0 - 3); + + BOOST_HANA_CONSTEXPR_CHECK(minus(3, 0, 1) == 3 - 0 - 1); + BOOST_HANA_CONSTEXPR_CHECK(hana::flip(minus)(3, 0, 1) == 0 - 3 - 1); +} |