Adding begin,end,size propagation for containers which support it

Author: Przemo

inc/owned_pointer.hpp

@@ -156,6 +156,21 @@ class owned_pointer : std::shared_ptr<_priv::control_block_type>
   auto operator->() const -> element_type*;
   auto get(std::nothrow_t) const noexcept -> element_type*;
 
+  template<typename X = element_type>
+  auto begin() const -> decltype(std::declval<X>().begin()) { return get()->begin(); }
+  
+  template<typename X = element_type>
+  auto end() const -> decltype(std::declval<X>().end()) { return get()->end(); }
+  
+  template<typename X = element_type>
+  auto cbegin() const -> decltype(std::declval<X>().cbegin()) { return get()->cbegin(); }
+  
+  template<typename X = element_type>
+  auto cend() const -> decltype(std::declval<X>().cend()) { return get()->end(); }
+
+  template<typename X = element_type>
+  auto size() const -> decltype(std::declval<X>().size()) { return get()->size(); }
+  
   template<typename T>
   operator owned_pointer<T>() const noexcept;
 

ut/owned_pointer_ut.cpp

@@ -21,6 +21,8 @@
  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  * THE SOFTWARE.
 **/
+#include <gmock/gmock-generated-matchers.h>
+#include <gmock/gmock-matchers.h>
 #include <gtest/gtest.h>
 #include <gmock/gmock.h>
 
@@ -560,3 +562,25 @@ TEST_F(owned_pointer_ut, testCastingAddressMovement)
     take.giveme(*u);
   }
 }
+
+TEST_F(owned_pointer_ut, testBeginEndAndSizePropagation)
+{
+  std::vector<int> v{};
+  const auto o = csp::make_owned<std::vector<int>>(1, 2, 3, 4, 5);
+
+  std::copy(o.begin(), o.end(), std::back_inserter(v));
+
+  ASSERT_THAT(o.size(), ::testing::Eq(5));
+  ASSERT_THAT(v, ::testing::ElementsAre(1,2,3,4,5));
+}
+
+TEST_F(owned_pointer_ut, testCBeginEndAndSizePropagation)
+{
+  std::vector<int> v{};
+  const auto o = csp::make_owned<std::vector<int>>(1, 2, 3, 4, 5);
+
+  std::copy(o.cbegin(), o.cend(), std::back_inserter(v));
+
+  ASSERT_THAT(o.size(), ::testing::Eq(5));
+  ASSERT_THAT(v, ::testing::ElementsAre(1,2,3,4,5));
+}