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- // (C) Copyright Eric Niebler 2005.
- // Use, modification and distribution are subject to the
- // Boost Software License, Version 1.0. (See accompanying file
- // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
- #include <boost/test/unit_test.hpp>
- #include <boost/accumulators/accumulators.hpp>
- #include <boost/accumulators/statistics/stats.hpp>
- #include <boost/accumulators/statistics/mean.hpp>
- using namespace boost;
- using namespace unit_test;
- using namespace accumulators;
- namespace my
- {
- BOOST_PARAMETER_KEYWORD(tag, int_ref)
- BOOST_PARAMETER_KEYWORD(tag, sum_acc)
- }
- ///////////////////////////////////////////////////////////////////////////////
- // test_stat
- //
- void test_stat()
- {
- int i = 0;
- accumulator_set<double, stats<tag::reference<int, my::tag::int_ref> > > acc(
- my::int_ref = i);
- int &ref1 = accumulators::reference<int, my::tag::int_ref>(acc);
- int &ref2 = accumulators::reference_tag<my::tag::int_ref>(acc);
- BOOST_CHECK_EQUAL(&i, &ref1);
- BOOST_CHECK_EQUAL(&i, &ref2);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // test_external
- //
- void test_external()
- {
- typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
- sum_acc_type sum_acc; // the sum accumulator
- accumulator_set<
- int
- , stats<
- tag::mean
- , tag::external<tag::sum, my::tag::sum_acc> // make sum external
- , tag::reference<sum_acc_type, my::tag::sum_acc> // and hold a reference to it
- >
- > acc_with_ref(my::sum_acc = sum_acc); // initialize the reference sum
- sum_acc(1);
- sum_acc(2); // sum is now 3 for both
- BOOST_CHECK_EQUAL(sum(acc_with_ref), sum(sum_acc));
- BOOST_CHECK_EQUAL(sum(acc_with_ref), 3);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // test_external2
- //
- void test_external2()
- {
- typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
- sum_acc_type sum_acc; // the sum accumulator
- accumulator_set<
- int
- , stats<
- tag::mean
- // make sum external and hold a reference to it
- , tag::external<tag::sum, my::tag::sum_acc, sum_acc_type>
- >
- > acc_with_ref(my::sum_acc = sum_acc); // initialize the reference sum
- sum_acc(1);
- sum_acc(2); // sum is now 3 for both
- BOOST_CHECK_EQUAL(sum(acc_with_ref), sum(sum_acc));
- BOOST_CHECK_EQUAL(sum(acc_with_ref), 3);
- }
- ///////////////////////////////////////////////////////////////////////////////
- // init_unit_test_suite
- //
- test_suite* init_unit_test_suite( int argc, char* argv[] )
- {
- test_suite *test = BOOST_TEST_SUITE("reference_accumulator test");
- test->add(BOOST_TEST_CASE(&test_stat));
- test->add(BOOST_TEST_CASE(&test_external));
- test->add(BOOST_TEST_CASE(&test_external2));
- return test;
- }
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