From 970a179ac215ceedc8eed10f601ed33104cdb72f Mon Sep 17 00:00:00 2001
From: Andrey Semashev <Lastique@users.noreply.github.com>
Date: Mon, 5 Oct 2015 18:24:52 +0300
Subject: [PATCH] Make the default constructor constexpr

---
 include/boost/smart_ptr/intrusive_ptr.hpp | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/boost/smart_ptr/intrusive_ptr.hpp b/include/boost/smart_ptr/intrusive_ptr.hpp
index e5db609..58041da 100644
--- a/include/boost/smart_ptr/intrusive_ptr.hpp
+++ b/include/boost/smart_ptr/intrusive_ptr.hpp
@@ -59,7 +59,7 @@ public:
 
     typedef T element_type;
 
-    intrusive_ptr() BOOST_NOEXCEPT : px( 0 )
+    BOOST_CONSTEXPR intrusive_ptr() BOOST_NOEXCEPT : px( 0 )
     {
     }