ticket 7294 iterator_range hash_value support.

include/boost/range/iterator_range_hash.hpp

@@ -0,0 +1,22 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 2014
+//  Use, modification and distribution is 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+#include <boost/range/iterator_range_core.hpp>
+#include <boost/functional/hash.hpp>
+
+namespace boost
+{
+
+template<class T>
+std::size_t hash_value(const iterator_range<T>& rng)
+{
+    return boost::hash_range(rng.begin(), rng.end());
+}
+
+} // namespace boost

test/Jamfile.v2

@@ -161,6 +161,7 @@ test-suite range :
     [ range-test iterator_pair ]
     [ range-test iterator_range ]
     [ range-test iterator_range_drop ]
+    [ range-test iterator_range_hash ]
     [ range-test iterator_range_variant ]
 #       [ range-test mfc : <include>$(VC71_ROOT)/atlmfc/include ]
     [ range-test join ]

test/iterator_range_hash.cpp

@@ -0,0 +1,52 @@
+// Boost.Range library
+//
+//  Copyright Neil Groves 2014. Use, modification and
+//  distribution is 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)
+//
+// For more information, see http://www.boost.org/libs/range/
+//
+
+#include <boost/range/iterator_range_hash.hpp>
+
+#include <boost/test/test_tools.hpp>
+#include <boost/test/unit_test.hpp>
+
+#include <vector>
+
+namespace boost_range_test
+{
+    namespace
+    {
+
+void test_iterator_range_hash()
+{
+    std::vector<boost::int32_t> v;
+
+    for (boost::int32_t i = 0; i < 10; ++i)
+    {
+        v.push_back(i);
+    }
+
+    std::size_t ref_output = boost::hash_range(v.begin(), v.end());
+
+    boost::iterator_range<std::vector<boost::int32_t>::iterator> rng(v);
+
+    std::size_t test_output = boost::hash_value(rng);
+
+    BOOST_CHECK_EQUAL(ref_output, test_output);
+}
+
+    } // anonymous namespace
+} // namespace boost_range_test
+
+boost::unit_test::test_suite* init_unit_test_suite( int argc, char* argv[] )
+{
+    boost::unit_test::test_suite* test =
+        BOOST_TEST_SUITE("Boost.Range iterator_range hash function");
+
+    test->add(BOOST_TEST_CASE(&boost_range_test::test_iterator_range_hash));
+
+    return test;
+}