push_back: added support for not-copyable but moveable value-types like e.g. unique_ptr

test/algorithm_ext_test/push_back.cpp

@@ -19,6 +19,7 @@
 #include <list>
 #include <vector>
 
+
 namespace
 {
     template< class Container >
@@ -58,6 +59,76 @@ namespace
         test_push_back_impl< std::vector<std::size_t> >();
         test_push_back_impl< std::list<std::size_t> >();
     }
+
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
+    // test type which is not copyable by moveable.
+    class noncopyable_int : boost::noncopyable {
+      private:
+        int i;
+      public:
+        noncopyable_int(int x) : i(x) {}
+        noncopyable_int(const noncopyable_int&) = delete;
+        noncopyable_int& operator=(const noncopyable_int&) = delete;
+        noncopyable_int(noncopyable_int&& o) : i(o.i) {}
+        noncopyable_int& operator=(noncopyable_int&& o) { return o; }
+        bool operator!=(const noncopyable_int &rhs) { return i != rhs.i; }
+        friend std::ostream &operator<<(std::ostream &os, const noncopyable_int& x);
+    };
+
+    std::ostream & operator<<(std::ostream &os, const noncopyable_int& x)
+    {
+       return os << x.i;
+    }
+
+    template< class Container >
+    void test_push_back_move_impl(std::size_t n)
+    {
+        Container test;
+        Container reference;
+        for (std::size_t i = 0; i < n; ++i)
+            reference.push_back(noncopyable_int(i));
+
+        {
+            Container to_push_back;
+            for (std::size_t i = 0; i < n; ++i)
+                to_push_back.push_back(noncopyable_int(i));
+
+            boost::push_back(test, std::move(to_push_back));
+
+            BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
+                test.begin(), test.end() );
+        }
+        // Do it again to push onto non-empty container
+        for (std::size_t i = 0; i < n; ++i)
+            reference.push_back(noncopyable_int(i));
+
+        {
+            Container to_push_back;
+            for (std::size_t i = 0; i < n; ++i)
+                to_push_back.push_back(noncopyable_int(i));
+
+            boost::push_back(test, std::move(to_push_back));
+
+            BOOST_CHECK_EQUAL_COLLECTIONS( reference.begin(), reference.end(),
+                test.begin(), test.end() );
+        }
+    }
+
+    template< class Container >
+    void test_push_back_move_impl()
+    {
+        test_push_back_move_impl< Container >(0);
+        test_push_back_move_impl< Container >(1);
+        test_push_back_move_impl< Container >(2);
+        test_push_back_move_impl< Container >(100);
+    }
+
+    void test_push_back_move()
+    {
+        test_push_back_move_impl< std::vector<noncopyable_int> >();
+        test_push_back_move_impl< std::list<noncopyable_int> >();
+    }
+#endif
 }
 
 boost::unit_test::test_suite*
@@ -67,6 +138,9 @@ init_unit_test_suite(int argc, char* argv[])
         = BOOST_TEST_SUITE( "RangeTestSuite.algorithm_ext.push_back" );
 
     test->add( BOOST_TEST_CASE( &test_push_back ) );
+#if !defined( BOOST_NO_CXX11_RVALUE_REFERENCES )
+    test->add( BOOST_TEST_CASE( &test_push_back_move ) );
+#endif
 
     return test;
 }