add namespaces to create linker errors

Incubator.cpp

@@ -39,6 +39,9 @@
 
 #include <boost/optional.hpp>
 
+namespace incubator
+{
+
 enum SpellCastResult
 {
     SPELL_FAILED_SUCCESS = 0,
@@ -714,6 +717,10 @@ void test_cross_forward()
     ++i;
 }
 
+} // namespace incubator
+
+using namespace incubator;
+
 void test_incubator()
 {
     test_cross_forward();

mockup.cpp

@@ -20,6 +20,10 @@
 #include <tuple>
 #include <memory>
 
+
+namespace mockup
+{
+
 template <typename...>
 struct Continuable;
 
@@ -172,6 +176,10 @@ void final_mockup()
         });
 }
 
+}// namespace mockup
+
+using namespace mockup;
+
 void test_mockup()
 {
     create_continuable_mockup();