From ee250bda6c6bf3f2ca6003cd865b5779bfee3ca3 Mon Sep 17 00:00:00 2001
From: Douglas Gregor <doug.gregor@gmail.com>
Date: Wed, 12 Feb 2003 22:05:17 +0000
Subject: [PATCH] For first_argument_type/second_argument_type and
 argument_type adaptations, use reference-to-const for the arguments (because
 this is what the standard binders do)

[SVN r957]
---
 include/boost/ref.hpp | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/include/boost/ref.hpp b/include/boost/ref.hpp
index fba17d2..1b55c7e 100644
--- a/include/boost/ref.hpp
+++ b/include/boost/ref.hpp
@@ -259,7 +259,8 @@ public:
   typename get_result_type<Result,
                            get_result_type2<T, first_argument_type,
                                             second_argument_type> >::type
-  operator()(first_argument_type a1, second_argument_type a2) const
+  operator()(const first_argument_type& a1,
+             const second_argument_type& a2) const
   {
     return this->get()(a1, a2);
   }
@@ -316,7 +317,7 @@ public:
   using inherited::operator();
 
   typename get_result_type<Result, get_result_type1<T, argument_type> >::type
-  operator()(argument_type a1) const
+  operator()(const argument_type& a1) const
   {
     return this->get()(a1);
   }