From 5328370ab6d885a412e6903a68763e7f5363cca7 Mon Sep 17 00:00:00 2001
From: John Maddock <john@johnmaddock.co.uk>
Date: Sun, 30 Jan 2005 15:47:46 +0000
Subject: [PATCH] Bring type traits into line with TR1

[SVN r26937]
---
 include/boost/pending/ct_if.hpp | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/include/boost/pending/ct_if.hpp b/include/boost/pending/ct_if.hpp
index 29fdbc4..2f8540d 100644
--- a/include/boost/pending/ct_if.hpp
+++ b/include/boost/pending/ct_if.hpp
@@ -19,13 +19,12 @@
   problem.
 */
 
+#include <boost/type_traits/integral_constant.hpp> // true_type and false_type
+
 namespace boost {
 
   struct ct_if_error { };
 
-  struct true_type { enum { value = true }; };
-  struct false_type { enum { value = false }; };
-
   template <class A, class B>
   struct ct_and { typedef false_type type; };
   template <> struct ct_and<true_type,true_type> { typedef true_type type; };