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Diffstat (limited to 'src/boost/libs/hana/example/map/keys.cpp')
-rw-r--r-- | src/boost/libs/hana/example/map/keys.cpp | 30 |
1 files changed, 30 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/map/keys.cpp b/src/boost/libs/hana/example/map/keys.cpp new file mode 100644 index 000000000..073d6dec6 --- /dev/null +++ b/src/boost/libs/hana/example/map/keys.cpp @@ -0,0 +1,30 @@ +// 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/contains.hpp> +#include <boost/hana/integral_constant.hpp> +#include <boost/hana/keys.hpp> +#include <boost/hana/map.hpp> +#include <boost/hana/pair.hpp> +#include <boost/hana/permutations.hpp> +#include <boost/hana/tuple.hpp> +#include <boost/hana/type.hpp> + +#include <string> +namespace hana = boost::hana; +using namespace std::literals; + + +int main() { + auto m = hana::make_map( + hana::make_pair(hana::int_c<1>, "foobar"s), + hana::make_pair(hana::type_c<void>, 1234) + ); + + // The order of the keys is unspecified. + BOOST_HANA_CONSTANT_CHECK( + hana::keys(m) ^hana::in^ hana::permutations(hana::make_tuple(hana::int_c<1>, hana::type_c<void>)) + ); +} |