Re: [Boost-bugs] [Boost C++ Libraries] #9851: Iterators from rang have different category than the range

Subject: Re: [Boost-bugs] [Boost C++ Libraries] #9851: Iterators from rang have different category than the range
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2014-05-06 11:06:22

#9851: Iterators from rang have different category than the range
-------------------------------+------------------------
  Reporter:  anonymous         |      Owner:  neilgroves
      Type:  Bugs              |     Status:  new
 Milestone:  To Be Determined  |  Component:  range
   Version:  Boost 1.55.0      |   Severity:  Problem
Resolution:                    |   Keywords:
-------------------------------+------------------------

Comment (by neilgroves):

 Replying to [comment:1 anonymous]:
 > Strangely, removing the line
 > {{{
 > auto c = vector<int>(b::begin(b), b::end(b));
 > }}}
 > results in the output "1, 1" instead of "0, 0", so it seems like merely
 chaining together adaptors causes the functions to be called. Perhaps the
 problem is caused by something other than iterator categories after all.

 This is because range adaptors are applied lazily. Therefore the change in
 invocation counts is correct behaviour.

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/9851#comment:2>
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