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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
commit | 19fcec84d8d7d21e796c7624e521b60d28ee21ed (patch) | |
tree | 42d26aa27d1e3f7c0b8bd3fd14e7d7082f5008dc /src/boost/libs/hana/example/zip_with.cpp | |
parent | Initial commit. (diff) | |
download | ceph-upstream/16.2.11+ds.tar.xz ceph-upstream/16.2.11+ds.zip |
Adding upstream version 16.2.11+ds.upstream/16.2.11+dsupstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/boost/libs/hana/example/zip_with.cpp')
-rw-r--r-- | src/boost/libs/hana/example/zip_with.cpp | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/zip_with.cpp b/src/boost/libs/hana/example/zip_with.cpp new file mode 100644 index 000000000..55ae01026 --- /dev/null +++ b/src/boost/libs/hana/example/zip_with.cpp @@ -0,0 +1,51 @@ +// 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/equal.hpp> +#include <boost/hana/ext/std/tuple.hpp> +#include <boost/hana/mult.hpp> +#include <boost/hana/transform.hpp> +#include <boost/hana/tuple.hpp> +#include <boost/hana/type.hpp> +#include <boost/hana/unpack.hpp> +#include <boost/hana/zip_with.hpp> + +#include <tuple> +#include <type_traits> +#include <utility> +namespace hana = boost::hana; + + +// Basic usage: +static_assert( + hana::zip_with(hana::mult, hana::make_tuple(1, 2, 3, 4), hana::make_tuple(5, 6, 7, 8)) + == + hana::make_tuple(5, 12, 21, 32) +, ""); + + + +// Example of computing a tuple of all the common types of several tuples: +template<typename... Ts> +using common_tuple_t = typename decltype( + hana::unpack( + hana::zip_with( + hana::metafunction<std::common_type>, + hana::transform(std::declval<Ts>(), hana::decltype_)... + ), + hana::template_<std::tuple> + ) +)::type; + + +static_assert(std::is_same< + common_tuple_t< + std::tuple<bool, int, unsigned>, + std::tuple<char, long, long>, + std::tuple<int, long long, double> + >, + std::tuple<int, long long, double> +>::value, ""); + +int main() { } |