Re: [Boost-bugs] [Boost C++ Libraries] #11902: bind placeholder _1 is not defined

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #11902: bind placeholder _1 is not defined
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2016-01-23 19:14:45

#11902: bind placeholder _1 is not defined
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  Reporter:  zimmermann@…      |      Owner:  pdimov
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  bind
   Version:  Boost 1.60.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+---------------------

Comment (by pdimov):

 This is by design; from now on, ```#include <boost/bind/bind.hpp>```
 defines ```_1``` in namespace ```boost::placeholders``` without importing
 it into the global namespace, to avoid conflicts. For backward
 compatibility, ```#include <boost/bind.hpp>``` includes
 ```boost/bind/bind.hpp``` and does ```using namespace
 boost::placeholders;```.

 So, to make the code compile, either include ```boost/bind.hpp``` instead,
 or add ```using namespace boost::placeholders;```.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/11902#comment:3>
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