From e43796c42c6c0b3e5a4fb4262132a0d66f27eeb6 Mon Sep 17 00:00:00 2001
From: Neil Groves <neilgroves@googlemail.com>
Date: Wed, 4 Jun 2014 13:15:04 +0100
Subject: [PATCH] allow clang to use Range Concepts despite reporting GCC 4.2.

---
 include/boost/range/concepts.hpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/include/boost/range/concepts.hpp b/include/boost/range/concepts.hpp
index d957c1b..3e612a3 100644
--- a/include/boost/range/concepts.hpp
+++ b/include/boost/range/concepts.hpp
@@ -64,6 +64,7 @@ namespace boost {
 #ifndef BOOST_RANGE_ENABLE_CONCEPT_ASSERT
 
 // List broken compiler versions here:
+#ifndef __clang__
     #ifdef __GNUC__
         // GNUC 4.2 has strange issues correctly detecting compliance with the Concepts
         // hence the least disruptive approach is to turn-off the concept checking for
@@ -79,6 +80,7 @@ namespace boost {
             #define BOOST_RANGE_ENABLE_CONCEPT_ASSERT 0
         #endif
     #endif
+#endif
 
     #ifdef __BORLANDC__
         #define BOOST_RANGE_ENABLE_CONCEPT_ASSERT 0