[Boost-bugs] [Boost C++ Libraries] #8446: Problems with 'repeat' in alternative parser

Subject: [Boost-bugs] [Boost C++ Libraries] #8446: Problems with 'repeat' in alternative parser
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2013-04-16 12:27:14

#8446: Problems with 'repeat' in alternative parser
-----------------------------------------------------------+----------------
 Reporter:  Nikita Rogatnev <nikita.rogatnev@…>            |       Owner:  djowel    
     Type:  Bugs                                           |      Status:  new       
Milestone:  To Be Determined                               |   Component:  spirit    
  Version:  Boost 1.49.0                                   |    Severity:  Regression
 Keywords:                                                 |  
-----------------------------------------------------------+----------------
 The behavior of the result parser unexpectedly depends from order of the
 'repeat' statements within 'Alternative' parser.

 As example:
 "repeat(n)[...] | repeat(m)[...]" works not like "repeat(m)[...] |
 repeat(n)[...]" in some circumstances.

 I've been using the example from this
 [http://stackoverflow.com/questions/4009752/boost-spirit-bug-when-mixing-

 alternates-with-optionals] thread to identify problem (sample source is
 attached below).

 The output of the result application:

 in boost 1.44 (bug was fixed after stackoverflow thread):
   Success: '123FAA22'
   Failed to match.
   Success: '123F'
   Success: '1A22'

 in boost 1.45 (seems to be correct):
   Success: '123FAA22'
   Success: '12AA'
   Success: '123F'
   Success: '1A22'

 in boost 1.49 :
   Success: '123FAA22'
   Success: '12AA12AA' (Incorrect)
   Success: '123F'
   Success: '1A22'

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/8446>
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