1 files changed, 95 insertions, 0 deletions
diff --git a/src/boost/libs/accumulators/test/reference.cpp b/src/boost/libs/accumulators/test/reference.cpp
new file mode 100644
index 00000000..bf9b6c60
--- /dev/null
+++ b/src/boost/libs/accumulators/test/reference.cpp
@@ -0,0 +1,95 @@
+//  (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;
+}