From 42c2c4e6a4f18d2a44f006769c6eeacaff85a4bc Mon Sep 17 00:00:00 2001
From: mat007 <mat007@860be788-9bd5-4423-9f1e-828f051e677b>
Date: Sun, 12 May 2013 08:59:11 +0000
Subject: [PATCH] Cleanup

git-svn-id: https://svn.code.sf.net/p/turtle/code/trunk@647 860be788-9bd5-4423-9f1e-828f051e677b
---
 turtle/log.hpp | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/turtle/log.hpp b/turtle/log.hpp
index 4d73950..86f13bd 100644
--- a/turtle/log.hpp
+++ b/turtle/log.hpp
@@ -113,27 +113,27 @@ namespace detail
         return s;
     }
     template< typename T >
-    stream& operator<<( stream& s, boost::reference_wrapper< T > t )
+    stream& operator<<( stream& s, const boost::reference_wrapper< T >& t )
     {
         return s << mock::format( t.get() );
     }
     template< typename T >
-    stream& operator<<( stream& s, boost::shared_ptr< T > t )
+    stream& operator<<( stream& s, const boost::shared_ptr< T >& t )
     {
         return s << mock::format( t.get() );
     }
     template< typename T >
-    stream& operator<<( stream& s, boost::weak_ptr< T > t )
+    stream& operator<<( stream& s, const boost::weak_ptr< T >& t )
     {
         return s << mock::format( t.lock() );
     }
     template< typename T >
-    stream& operator<<( stream& s, boost::lambda::lambda_functor< T > )
+    stream& operator<<( stream& s, const boost::lambda::lambda_functor< T >& )
     {
         return s << '?';
     }
     template< typename T >
-    stream& operator<<( stream& s, boost::phoenix::actor< T > )
+    stream& operator<<( stream& s, const boost::phoenix::actor< T >& )
     {
         return s << '?';
     }