[Boost-bugs] [Boost C++ Libraries] #6554: Compiler error dereferencing multi_array value via an iterator

Subject: [Boost-bugs] [Boost C++ Libraries] #6554: Compiler error dereferencing multi_array value via an iterator
From: Boost C++ Libraries (noreply_at_[hidden])
Date: 2012-02-13 17:46:48

#6554: Compiler error dereferencing multi_array value via an iterator
------------------------------+---------------------------------------------
 Reporter:  bill_buklis       |       Owner:  garcia     
     Type:  Bugs              |      Status:  new        
Milestone:  To Be Determined  |   Component:  multi_array
  Version:  Boost 1.49.0      |    Severity:  Problem    
 Keywords:                    |  
------------------------------+---------------------------------------------
 It is currently impossible to dereference/access the values contained in a
 multi_array via the -> operator from an iterator to the multi_array
 element. However, use the * operator works.

 Example:

 {{{
 struct data
 {
         int     value;
 };
 typedef boost::multi_array<data, 2> array_type;

 array_type      a(boost::extents[4][5]);

 // ERROR: Cannot compile this line
 a.begin()->begin()->value = 7;

 // Compiles successfully
 (*a.begin()->begin()).value = 5;

 }}}

 I'm using Visual Studio 2010. This is an error in both debug and release
 modes. This is the error:

 boost/multi_array/iterator.hpp(40): error C2528: '->' : pointer to
 reference is illegal

-- 
Ticket URL: <https://svn.boost.org/trac/boost/ticket/6554>
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