[Boost-bugs] [Boost C++ Libraries] #8556: Cannot combine synthesized attributes with semantic actions in some cases

Subject: [Boost-bugs] [Boost C++ Libraries] #8556: Cannot combine synthesized attributes with semantic actions in some cases
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-05-08 23:55:57

#8556: Cannot combine synthesized attributes with semantic actions in some cases
---------------------------------------+------------------------------------
 Reporter:  Jeff Trull (@…             |       Owner:  djowel 
     Type:  Bugs                       |      Status:  new    
Milestone:  To Be Determined           |   Component:  spirit 
  Version:  Boost 1.52.0               |    Severity:  Problem
 Keywords:                             |  
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 The use of "%=" in rule definitions appears intended to permit
 simultaneous use of semantic actions and synthesized attributes.  However,
 in some cases I find I can choose only one.  In particular a rule of this
 form:

 rule<Iterator, std::vector<std::string>()> r;
 r = qi::string >> qi::string >> qi::string;

 successfully synthesizes its attribute, while the same rule defined this
 way:

 r = (qi::string >> qi::string >> qi::string)[SA]

 successfully compiles and runs its semantic action.  However, combining
 them fails:

 r %= (qi::string >> qi::string >> qi::string)[SA]

 produces a compile error.  Test case attached.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8556>
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