From 0fc1749bd7b300b0ad7a6ec45eefff5ea9057a0f Mon Sep 17 00:00:00 2001
From: Marcel Raad <MarcelRaad@users.noreply.github.com>
Date: Mon, 2 Mar 2015 18:47:19 +0100
Subject: [PATCH] Fix MSVC14 compile break

array_binary_tree_node::children_type::iterator pretends to be a bidirectional iterator but does not define operator--, which results in compile breaks with Visual C++ 2015.
---
 include/boost/graph/detail/array_binary_tree.hpp | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/include/boost/graph/detail/array_binary_tree.hpp b/include/boost/graph/detail/array_binary_tree.hpp
index 78755556..e59da9e1 100644
--- a/include/boost/graph/detail/array_binary_tree.hpp
+++ b/include/boost/graph/detail/array_binary_tree.hpp
@@ -63,6 +63,9 @@ public:
       inline iterator& operator++() { ++i; return *this; }
       inline iterator operator++(int)
         { iterator t = *this; ++(*this); return t; }
+      inline iterator& operator--() { --i; return *this; }
+      inline iterator operator--(int)
+        { iterator t = *this; --(*this); return t; }
       inline bool operator==(const iterator& x) const { return i == x.i; }
       inline bool operator!=(const iterator& x) const
         { return !(*this == x); }