[Bug c++/41803] New: Compiler forcing iterator to const

[dont_spam_james at yahoo dot com]

In the source code there are two classes, Point and Edge.  A series of points
are stored in a std::multiset.  Edges are formed between the points, referenced
by multiset iterators.  The points are given pointers to the edge they are a
part of.

In the function Edge::splitEdge, an edge is broken up by a new point.  The
point is added to the multiset, a new edge is created, the edge's iterators are
reset, and the Edge pointers are reset.

When resetting the Edge pointers, the compiler is insisting that the data
contained in std::multiset<Point>::iterator is a const Point.

If I change the Point member data Edge *dp_edge to mutable and make the
Point::setEdge function const, the code compiles.


-- 
           Summary: Compiler forcing iterator to const
           Product: gcc
           Version: 4.2.2
            Status: UNCONFIRMED
          Severity: normal
          Priority: P3
         Component: c++
        AssignedTo: unassigned at gcc dot gnu dot org
        ReportedBy: dont_spam_james at yahoo dot com
 GCC build triplet: x84_64-unknown-linux-gnu
  GCC host triplet: x84_64-unknown-linux-gnu
GCC target triplet: x84_64-unknown-linux-gnu


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=41803