[Boost-bugs] [Boost C++ Libraries] #3815: Clearing an iterator range

Subject: [Boost-bugs] [Boost C++ Libraries] #3815: Clearing an iterator range
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2010-01-04 08:49:43

#3815: Clearing an iterator range
--------------------------+-------------------------------------------------
 Reporter:  danieljames   |       Owner:  djowel 
     Type:  Bugs          |      Status:  new    
Milestone:  Boost 1.42.0  |   Component:  spirit 
  Version:  Boost 1.41.0  |    Severity:  Problem
 Keywords:                |  
--------------------------+-------------------------------------------------
 The attached test fails to compile with this error:
 {{{
 ../quickbook-1.5/boost/spirit/home/support/attributes.hpp:710: error:
 'class boost::iterator_range<const char*>' has no member named 'clear'
 }}}
 The problem is that `iterator_range` looks enough like a container so that
 `is_container` returns true, but it doesn't have a `clear` method. The
 attached patch attempts to fix this by adding a special case to clear
 iterator ranges.

 I used a slightly odd method to clear the range, because for some reason
 `begin` is called for the cleared range (this may be a bug) and that's not
 allowed for default constructed ranges (since default constructed
 iterators can be singular).

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/3815>
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