From e15d6b1cd9813db0002887d42583258da31b06d4 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Ion=20Gazta=C3=B1aga?= <igaztanaga@gmail.com>
Date: Tue, 17 Feb 2009 17:03:10 +0000
Subject: [PATCH] Ticket #2755: compile error in boost_intrusive 1.38.0: a set
 of classes with protected destructor

[SVN r51290]
---
 include/boost/intrusive/detail/mpl.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/intrusive/detail/mpl.hpp b/include/boost/intrusive/detail/mpl.hpp
index 15954b9..20f50da 100644
--- a/include/boost/intrusive/detail/mpl.hpp
+++ b/include/boost/intrusive/detail/mpl.hpp
@@ -64,7 +64,7 @@ class is_convertible
    class false_t { char dummy[2]; };
    static true_t dispatch(U);
    static false_t dispatch(...);
-   static T trigger();
+   static const T &trigger();
    public:
    static const bool value = sizeof(dispatch(trigger())) == sizeof(true_t);
 };