[Boost-bugs] [Boost C++ Libraries] #7977: functor_input example for multi_pass iterator has various issues

Subject: [Boost-bugs] [Boost C++ Libraries] #7977: functor_input example for multi_pass iterator has various issues
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-02-05 03:10:23

#7977: functor_input example for multi_pass iterator has various issues
------------------------------------------+---------------------------------
 Reporter:  Jeff Trull <edaskel@…>        |       Owner:  djowel 
     Type:  Bugs                          |      Status:  new    
Milestone:  To Be Determined              |   Component:  spirit 
  Version:  Boost Development Trunk       |    Severity:  Problem
 Keywords:                                |  
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 As given, the functor_input example in the multi_pass documentation (see
 "How to write a functor for use with the functor_input InputPolicy") will
 not compile, and once the compile issues are fixed, will not run
 successfully.  The issues are more than simply typos - among them are:

 1) operator() cannot be const, as it modifies the private member c_
 2) policies are given to multi_pass directly instead of through
 default_policy
 3) the policies are in the wrong order (functor_input must be third, not
 first)
 4) '\0' cannot be used as the EOF marker, because the multi_pass is_eof()
 member will return true in this case due to a comparison against the
 initialized curtok value of 0 - this may be a bug.

 I have attached a modified version of the example which works as described
 in the documentation.

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Ticket URL: <https://svn.boost.org/trac/boost/ticket/7977>
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