Factory: modify add_creator method

[metaproxy-moved-to-github.git] / src / factory_filter.cpp

diff --git a/src/factory_filter.cpp b/src/factory_filter.cpp
index a446ba2..c1cb0b7 100644 (file)
--- a/src/factory_filter.cpp
+++ b/src/factory_filter.cpp
@@ -66,8 +66,8 @@ mp::FactoryFilter::~FactoryFilter()
 
 }
 
-bool mp::FactoryFilter::add_creator(std::string fi,
-                                     CreateFilterCallback cfc)
+bool mp::FactoryFilter::add_creator(const std::string &fi,
+                                    CreateFilterCallback cfc)
 {
     return m_p->m_fcm.insert(Rep::CallbackMap::value_type(fi, cfc)).second;
 }