make string constructor argument a constant reference

3 files changed, 3 insertions, 3 deletions

diff --git a/src/base/songloading/songloader.hpp b/src/base/songloading/songloader.hpp
index bbe7dfcb..57afdefe 100644
--- a/src/base/songloading/songloader.hpp
+++ b/src/base/songloading/songloader.hpp
@@ -38,7 +38,7 @@ namespace usdx
 	class NoStrategyException : public BaseException
 	{
 	public:
-		NoStrategyException(std::string message) : BaseException(message) {};
+		NoStrategyException(const std::string& message) : BaseException(message) {};
 		~NoStrategyException () throw () {};
 	};
 
diff --git a/src/utils/base_exception.cpp b/src/utils/base_exception.cpp
index e00ba716..6f60c157 100644
--- a/src/utils/base_exception.cpp
+++ b/src/utils/base_exception.cpp
@@ -28,7 +28,7 @@
 
 namespace usdx
 {
-	BaseException::BaseException(std::string message) : message(message)
+	BaseException::BaseException(const std::string& message) : message(message)
 	{
 	}
 
diff --git a/src/utils/base_exception.hpp b/src/utils/base_exception.hpp
index 44f3c2b7..08e4b371 100644
--- a/src/utils/base_exception.hpp
+++ b/src/utils/base_exception.hpp
@@ -38,7 +38,7 @@ namespace usdx
 		std::string message;
 
 	protected:
-		BaseException(std::string message);
+		BaseException(const std::string& message);
 
 	public:
 		~BaseException() throw ();