From 4bbb6a4c463bbf1cd151291c57b6009c760e8026 Mon Sep 17 00:00:00 2001
From: Axel Huebl <axel.huebl@plasma.ninja>
Date: Wed, 15 Feb 2017 23:56:24 +0100
Subject: [PATCH] JSON Parser: Missing Bind Placeholders

Fixes missing placeholder includes to `boost::bind`.
```
boost/property_tree/json_parser/detail/parser.hpp(217): error: identifier "_1" is undefined
boost/property_tree/json_parser/detail/parser.hpp(520): error: identifier "_1" is undefined
```

Reported in
  https://svn.boost.org/trac/boost/ticket/12841
---
 include/boost/property_tree/json_parser/detail/parser.hpp | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/include/boost/property_tree/json_parser/detail/parser.hpp b/include/boost/property_tree/json_parser/detail/parser.hpp
index 5554990fb..9ad5c0068 100644
--- a/include/boost/property_tree/json_parser/detail/parser.hpp
+++ b/include/boost/property_tree/json_parser/detail/parser.hpp
@@ -5,6 +5,7 @@
 
 #include <boost/ref.hpp>
 #include <boost/bind.hpp>
+#include <boost/bind/placeholders.hpp>
 #include <boost/format.hpp>
 
 #include <iterator>
@@ -214,7 +215,8 @@ namespace boost { namespace property_tree {
         void process_codepoint(Sentinel end, EncodingErrorFn error_fn) {
             encoding.transcode_codepoint(cur, end,
                 boost::bind(&Callbacks::on_code_unit,
-                            boost::ref(callbacks), _1),
+                            boost::ref(callbacks),
+                            boost::placeholders::_1),
                 error_fn);
         }
 
@@ -517,7 +519,8 @@ namespace boost { namespace property_tree {
         void feed(unsigned codepoint) {
             encoding.feed_codepoint(codepoint,
                                     boost::bind(&Callbacks::on_code_unit,
-                                                boost::ref(callbacks), _1));
+                                                boost::ref(callbacks),
+                                                boost::placeholders::_1));
         }
 
         Callbacks& callbacks;