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