diff options
author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-07 18:45:59 +0000 |
---|---|---|
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/scan_right.cpp | |
parent | Initial commit. (diff) | |
download | ceph-upstream.tar.xz ceph-upstream.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/scan_right.cpp')
-rw-r--r-- | src/boost/libs/hana/example/scan_right.cpp | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/src/boost/libs/hana/example/scan_right.cpp b/src/boost/libs/hana/example/scan_right.cpp new file mode 100644 index 000000000..42e04d39f --- /dev/null +++ b/src/boost/libs/hana/example/scan_right.cpp @@ -0,0 +1,39 @@ +// 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/scan_right.hpp> +#include <boost/hana/tuple.hpp> + +#include <sstream> +namespace hana = boost::hana; + + +auto to_string = [](auto x) { + std::ostringstream ss; + ss << x; + return ss.str(); +}; + +auto f = [](auto element, auto state) { + return "f(" + to_string(element) + ", " + to_string(state) + ")"; +}; + +int main() { + // with initial state + BOOST_HANA_RUNTIME_CHECK(hana::scan_right(hana::make_tuple(1, "2", '3'), 4, f) == hana::make_tuple( + "f(1, f(2, f(3, 4)))", + "f(2, f(3, 4))", + "f(3, 4)", + 4 + )); + + // without initial state + BOOST_HANA_RUNTIME_CHECK(hana::scan_right(hana::make_tuple(1, "2", '3'), f) == hana::make_tuple( + "f(1, f(2, 3))", + "f(2, 3)", + '3' + )); +} |