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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/local_function/test/factorial_seq.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/local_function/test/factorial_seq.cpp')
-rw-r--r-- | src/boost/libs/local_function/test/factorial_seq.cpp | 48 |
1 files changed, 48 insertions, 0 deletions
diff --git a/src/boost/libs/local_function/test/factorial_seq.cpp b/src/boost/libs/local_function/test/factorial_seq.cpp new file mode 100644 index 000000000..e7c242c27 --- /dev/null +++ b/src/boost/libs/local_function/test/factorial_seq.cpp @@ -0,0 +1,48 @@ + +// Copyright (C) 2009-2012 Lorenzo Caminiti +// Distributed under the Boost Software License, Version 1.0 +// (see accompanying file LICENSE_1_0.txt or a copy at +// http://www.boost.org/LICENSE_1_0.txt) +// Home at http://www.boost.org/libs/local_function + +#include <boost/local_function.hpp> +#include <boost/typeof/typeof.hpp> +#include BOOST_TYPEOF_INCREMENT_REGISTRATION_GROUP() +#include <boost/detail/lightweight_test.hpp> +#include <algorithm> +#include <vector> + +struct calculator; +BOOST_TYPEOF_REGISTER_TYPE(calculator) // Register before `bind this_` below. + +struct calculator { + std::vector<int> results; + + void factorials(const std::vector<int>& nums) { + int BOOST_LOCAL_FUNCTION( (bind this_) (int num) + (bool recursion)(default false) ) { + int result = 0; + + if(num <= 0) result = 1; + else result = num * factorial(num - 1, true); + + if(!recursion) this_->results.push_back(result); + return result; + } BOOST_LOCAL_FUNCTION_NAME(recursive factorial) + + std::for_each(nums.begin(), nums.end(), factorial); + } +}; + +int main(void) { + std::vector<int> v(3); + v[0] = 1; v[1] = 3; v[2] = 4; + + calculator calc; + calc.factorials(v); + BOOST_TEST(calc.results[0] == 1); + BOOST_TEST(calc.results[1] == 6); + BOOST_TEST(calc.results[2] == 24); + return boost::report_errors(); +} + |