Container registration scope can be updated (that was an unwanted bre…

…aking change from v1)

Hypodermic.Tests/ContainerBuilderTests.cpp

@@ -30,6 +30,29 @@ namespace Testing
         BOOST_CHECK_EQUAL(instance->i, expectedNumber);
     }
 
+    BOOST_AUTO_TEST_CASE(should_update_registrations)
+    {
+        // Arrange
+        ContainerBuilder builder;
+        builder.registerType< TypeWithOneDependency >();
+
+        auto container = builder.build();
+
+        // Act
+        ContainerBuilder newBuilder;
+        newBuilder.registerType< ProvidedDependency >().as< ProvidedDependencyBase >();
+
+        newBuilder.updateContainer(*container);
+
+        // Assert
+        std::shared_ptr< TypeWithOneDependency > instance;
+
+        BOOST_REQUIRE_NO_THROW(instance = container->resolve< TypeWithOneDependency >());
+
+        BOOST_REQUIRE(instance != nullptr);
+        BOOST_CHECK(instance->dependency != nullptr);
+    }
+
     BOOST_AUTO_TEST_SUITE_END()
 
 } // namespace Testing

Hypodermic/Container.h

@@ -41,6 +41,16 @@ namespace Hypodermic
             return std::make_shared< NestedRegistrationScope >(m_registrationScope);
         }
 
+        /// <summary>
+        /// Update the current registration scope
+        /// </summary>
+        /// <param name="scopeUpdater">The function responsible for updating the registration scope</param>
+        void updateRegistrationScope(const std::function< void(IRegistrationScope&) >& scopeUpdater) const
+        {
+            if (scopeUpdater)
+                scopeUpdater(*m_registrationScope);
+        }
+
         /// <summary>
         /// Resolve an instance of type T
         /// </summary>

Hypodermic/ContainerBuilder.h

@@ -71,6 +71,18 @@ namespace Hypodermic
             return createAndRegisterContainerInstance(scope);
         }
 
+        /// <summary>
+        /// Update a container
+        /// </summary>
+        /// <param name="container">The container to update</param>
+        void updateContainer(Container& container)
+        {
+            HYPODERMIC_LOG_INFO("Updating container");
+
+            for (auto&& x : m_registrationDescriptors)
+                container.updateRegistrationScope(m_buildActions[x]);
+        }
+
         /// <summary>
         /// Build a new and nested container from a passed Container
         /// </summary>