Re: [Boost-bugs] [Boost C++ Libraries] #9603: boost::optional operator<< does the wrong thing

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9603: boost::optional operator<< does the wrong thing
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2015-02-18 14:38:00

#9603: boost::optional operator<< does the wrong thing
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  Reporter:  a.luenser+boost@…  |      Owner:  fcacciola
      Type:  Bugs               |     Status:  new
 Milestone:  To Be Determined   |  Component:  optional
   Version:  Boost 1.55.0       |   Severity:  Problem
Resolution:                     |   Keywords:
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Comment (by akrzemi1):

 The last requirement is invalid, the preceding space is used precisely to
 tell apart a valid value '--' form an invalid value. Therefore, there is a
 way of telling valid from invalid values. While it is a bit confusing, any
 adopted model would be confusing. For a detailed discussion, See here:
 [http://www.open-

 std.org/jtc1/sc22/wg21/docs/papers/2013/n3527.html#rationale.io]
 Your expectation that no output should be printed for empty optional is
 just one of the options which is not better than any other.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9603#comment:2>
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