Re: [Boost-bugs] [Boost C++ Libraries] #1048: Spirit returns full = false in 1.34 if there is trailing spaces in input

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #1048: Spirit returns full = false in 1.34 if there is trailing spaces in input
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2007-06-18 02:26:11

#1048: Spirit returns full = false in 1.34 if there is trailing spaces in input
--------------------------------+-------------------------------------------
  Reporter:  ibaxter_at_[hidden]  |       Owner:                   
      Type:  Bugs               |      Status:  closed           
 Milestone:  To Be Determined   |   Component:  spirit           
   Version:  release 1.34.0     |    Severity:  Showstopper      
Resolution:  wontfix            |    Keywords:  spirit space full
--------------------------------+-------------------------------------------
Changes (by biochimia):

  * status:  new => closed
  * resolution:  => wontfix
  * summary:  Spirit returns full = false in 1.3.4 if there is trailing
              spaces in input => Spirit returns full = false
              in 1.34 if there is trailing spaces in input

Comment:

 The change in behaviour was intentional. It was made on the grounds of
 consistency (parsers shouldn't consume any more output than what they have
 matched), as well as to avoid a hang when directly parsing stdin: namely,
 parse() would hang waiting for a non-whitespace character at the end of a
 match.

 You may workaround this change by adding eps_p or end_p after your
 grammar, as in:

 {{{
 #!cpp
 my_grammar g;
 my_skipper skipper;

 parse(str, g >> eps_p, skipper); // 1

 parse(str, g >> end_p, skipper); // 2
 }}}

 The 2nd option requires a full match, while the first one gets you the
 previous behaviour without making a full match obligatory.

 Here's where the change was first announced, for context:

     http://thread.gmane.org/gmane.comp.parsers.spirit.general/9839


-- 
Ticket URL: <http://svn.boost.org/trac/boost/ticket/1048#comment:1>
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