From 8dee10d3c18e8cba37a45cd84b8f81f2907a229b Mon Sep 17 00:00:00 2001
From: Marcel Raad <MarcelRaad@users.noreply.github.com>
Date: Mon, 2 Mar 2015 18:39:37 +0100
Subject: [PATCH] Fix ptr_list compile break

https://github.com/boostorg/utility/commit/651a869d4f9479dd3dfdd0293305a60b8c8d0e1c broke the ptr_list regression tests as boost::next now uses operator+= if available instead of std::advance, which doesn't work for list iterators.
---
 include/boost/ptr_container/ptr_sequence_adapter.hpp | 19 +++++++++++++------
 1 file changed, 13 insertions(+), 6 deletions(-)

diff --git a/include/boost/ptr_container/ptr_sequence_adapter.hpp b/include/boost/ptr_container/ptr_sequence_adapter.hpp
index ad8542ed..5270255a 100644
--- a/include/boost/ptr_container/ptr_sequence_adapter.hpp
+++ b/include/boost/ptr_container/ptr_sequence_adapter.hpp
@@ -22,6 +22,7 @@
 #include <boost/ptr_container/detail/void_ptr_iterator.hpp>
 #include <boost/type_traits/remove_pointer.hpp>
 #include <boost/type_traits/is_same.hpp>
+#include <iterator>
 
 
 namespace boost
@@ -513,7 +514,9 @@ namespace ptr_container_detail
             size_type old_size = this->size();
             if( old_size > size )
             {
-                this->erase( boost::next( this->begin(), size ), this->end() );  
+                iterator from = this->begin();
+                std::advance( from, size );
+                this->erase( from, this->end() );
             }
             else if( size > old_size )
             {
@@ -530,7 +533,9 @@ namespace ptr_container_detail
             size_type old_size = this->size();
             if( old_size > size )
             {
-                this->erase( boost::next( this->begin(), size ), this->end() );  
+                iterator from = this->begin();
+                std::advance( from, size );
+                this->erase( from, this->end() );
             }
             else if( size > old_size )
             {
@@ -546,8 +551,9 @@ namespace ptr_container_detail
             size_type old_size = this->size();
             if( old_size > size )
             {
-                this->erase( this->begin(), 
-                             boost::next( this->begin(), old_size - size ) );  
+                iterator to = this->begin();
+                std::advance( to, old_size - size );
+                this->erase( this->begin(), to );
             }
             else if( size > old_size )
             {
@@ -564,8 +570,9 @@ namespace ptr_container_detail
             size_type old_size = this->size();
             if( old_size > size )
             {
-                this->erase( this->begin(), 
-                             boost::next( this->begin(), old_size - size ) );  
+                iterator to = this->begin();
+                std::advance( to, old_size - size );
+                this->erase( this->begin(), to );
             }
             else if( size > old_size )
             {