ceph/src/boost/libs/histogram/test/boost_range_support_test.cpp

   1 // Copyright 2018-2019 Hans Dembinski
   2 //
   3 // Distributed under the Boost Software License, Version 1.0.
   4 // (See accompanying file LICENSE_1_0.txt
   5 // or copy at http://www.boost.org/LICENSE_1_0.txt)
   6
   7 #include <boost/core/lightweight_test.hpp>
   8 #include <boost/histogram/axis/integer.hpp>
   9 #include "throw_exception.hpp"
  10 #include <boost/histogram/histogram.hpp>
  11 #include <boost/histogram/make_histogram.hpp>
  12 #include <boost/range/adaptor/filtered.hpp>
  13 #include <boost/range/numeric.hpp>
  14
  15 using namespace boost::histogram;
  16 using namespace boost::adaptors;
  17
  18 int main() {
  19   auto h = make_histogram(axis::integer<>(1, 4));
  20   h(1, weight(1));
  21   h(2, weight(2));
  22   h(3, weight(3));
  23   h(4, weight(4));
  24
  25   auto s1 = boost::accumulate(h | filtered([](double x) { return x > 2; }), 0.0);
  26   BOOST_TEST_EQ(s1, 7);
  27
  28   return boost::report_errors();
  29 }