Re: [Boost-bugs] [Boost C++ Libraries] #9291: can not compile sink->set_filter(phoenix::bind(&my_filter, ...

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9291: can not compile sink->set_filter(phoenix::bind(&my_filter, ...
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-10-23 14:14:17

#9291: can not compile sink->set_filter(phoenix::bind(&my_filter, ...
------------------------------------------+------------------------
  Reporter:  Johan Lundberg <lundberj@…>  |      Owner:  andysem
      Type:  Bugs                         |     Status:  new
 Milestone:  To Be Determined             |  Component:  log
   Version:  Boost 1.54.0                 |   Severity:  Regression
Resolution:                               |   Keywords:
------------------------------------------+------------------------

Comment (by andysem):

 This is a known problem caused by #7996. The workaround is to explicitly
 specify the fallback policy in case if the attribute value is missing, for
 example:

 {{{
 sink->set_filter(phoenix::bind(&my_filter, severity.or_none(),
 tag_attr.or_none()));
 }}}

 Here or_none means "pass an empty value_ref to my_filter if the attribute
 value is not found".

 I've updated the docs, thanks for the report.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9291#comment:2>
Boost C++ Libraries <http://www.boost.org/>
Boost provides free peer-reviewed portable C++ source libraries.