[Boost-bugs] [Boost C++ Libraries] #7197: Access regex_id from semantic action

Subject: [Boost-bugs] [Boost C++ Libraries] #7197: Access regex_id from semantic action
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-08-06 08:38:17

#7197: Access regex_id from semantic action
------------------------------------+---------------------------------------
 Reporter:  zeratul976@…            |       Owner:  eric_niebler
     Type:  Feature Requests        |      Status:  new         
Milestone:  To Be Determined        |   Component:  xpressive   
  Version:  Boost 1.51.0            |    Severity:  Problem     
 Keywords:                          |  
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 It would be useful to be able to access from a semantic action the
 regex_id of the regex to which the semantic action belongs.

 I propose a special symbol named _regex_id_ for this purpose.

 Examples:


 {{{
 sregex rx = xpr[cout << _regex_id_];
 regex_match(str, rx);  // prints rx.regex_id() on success
 }}}



 {{{
 sregex sub = xpr[cout << _regex_id_];
 sregex rx = sub >> another_xpr;
 regex_match(str, rx);  // prints sub.regex_id() on success (not
 rx.regex_id())
 }}}

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/7197>
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