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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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