Re: [Boost-bugs] [Boost C++ Libraries] #10193: [Spirit.qi] real_parser is too strict with the exponent part

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #10193: [Spirit.qi] real_parser is too strict with the exponent part
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-08-11 09:10:21

#10193: [Spirit.qi] real_parser is too strict with the exponent part
-------------------------------+----------------------
  Reporter:  anonymous         |      Owner:  djowel
      Type:  Bugs              |     Status:  reopened
 Milestone:  To Be Determined  |  Component:  spirit
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+----------------------

Comment (by djowel):

 OK, second try. Pardon the confusion. 42e is indeed not valid. What was I
 thinking!

 OK, here's what's happening. The parser parses 4e and attempts to find a
 number after that. So, 4em is not a double number and it fails. If I
 understand correctly, what you want is this:

     exponent_part =  -((lit('e') | 'E') >> -sign >> +digit);

 Is that correct? In other words, the whole exponent part is optional. I
 think that makes sense. I reopened this as a bug.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/10193#comment:6>
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