1 // (C) Copyright Eric Niebler 2005.
2 // Use, modification and distribution are subject to the
3 // Boost Software License, Version 1.0. (See accompanying file
4 // LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
5
6 #include <boost/test/unit_test.hpp>
7 #include <boost/accumulators/accumulators.hpp>
8 #include <boost/accumulators/statistics/stats.hpp>
9 #include <boost/accumulators/statistics/mean.hpp>
10
11 using namespace boost;
12 using namespace unit_test;
13 using namespace accumulators;
14
15 namespace my
16 {
17 BOOST_PARAMETER_KEYWORD(tag, int_ref)
18 BOOST_PARAMETER_KEYWORD(tag, sum_acc)
19 }
20
21 ///////////////////////////////////////////////////////////////////////////////
22 // test_stat
23 //
test_stat()24 void test_stat()
25 {
26 int i = 0;
27 accumulator_set<double, stats<tag::reference<int, my::tag::int_ref> > > acc(
28 my::int_ref = i);
29
30 int &ref1 = accumulators::reference<int, my::tag::int_ref>(acc);
31 int &ref2 = accumulators::reference_tag<my::tag::int_ref>(acc);
32
33 BOOST_CHECK_EQUAL(&i, &ref1);
34 BOOST_CHECK_EQUAL(&i, &ref2);
35 }
36
37 ///////////////////////////////////////////////////////////////////////////////
38 // test_external
39 //
test_external()40 void test_external()
41 {
42 typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
43 sum_acc_type sum_acc; // the sum accumulator
44 accumulator_set<
45 int
46 , stats<
47 tag::mean
48 , tag::external<tag::sum, my::tag::sum_acc> // make sum external
49 , tag::reference<sum_acc_type, my::tag::sum_acc> // and hold a reference to it
50 >
51 > acc_with_ref(my::sum_acc = sum_acc); // initialize the reference sum
52
53 sum_acc(1);
54 sum_acc(2); // sum is now 3 for both
55
56 BOOST_CHECK_EQUAL(sum(acc_with_ref), sum(sum_acc));
57 BOOST_CHECK_EQUAL(sum(acc_with_ref), 3);
58 }
59
60 ///////////////////////////////////////////////////////////////////////////////
61 // test_external2
62 //
test_external2()63 void test_external2()
64 {
65 typedef accumulator_set<int, stats<tag::sum> > sum_acc_type;
66 sum_acc_type sum_acc; // the sum accumulator
67 accumulator_set<
68 int
69 , stats<
70 tag::mean
71 // make sum external and hold a reference to it
72 , tag::external<tag::sum, my::tag::sum_acc, sum_acc_type>
73 >
74 > acc_with_ref(my::sum_acc = sum_acc); // initialize the reference sum
75
76 sum_acc(1);
77 sum_acc(2); // sum is now 3 for both
78
79 BOOST_CHECK_EQUAL(sum(acc_with_ref), sum(sum_acc));
80 BOOST_CHECK_EQUAL(sum(acc_with_ref), 3);
81 }
82
83 ///////////////////////////////////////////////////////////////////////////////
84 // init_unit_test_suite
85 //
init_unit_test_suite(int argc,char * argv[])86 test_suite* init_unit_test_suite( int argc, char* argv[] )
87 {
88 test_suite *test = BOOST_TEST_SUITE("reference_accumulator test");
89
90 test->add(BOOST_TEST_CASE(&test_stat));
91 test->add(BOOST_TEST_CASE(&test_external));
92 test->add(BOOST_TEST_CASE(&test_external2));
93
94 return test;
95 }
96