[MacPorts] #34227: boost::get() calls wrongly resolved by g++

[MacPorts]

#34227: boost::get() calls wrongly resolved by g++
----------------------------------+-----------------------------------------
 Reporter:  roland@…              |       Owner:  macports-tickets@…                   
     Type:  defect                |      Status:  new                                  
 Priority:  Normal                |   Milestone:                                       
Component:  ports                 |     Version:  2.0.4                                
 Keywords:                        |        Port:  boost                                
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 The current version of Boost available in the MacPorts (port `boost
 1.49.0`) seems to make g++ wrongly resolve some calls to boost::get().

 The attached C++ code `boost-get-test-ko.cc` does not compile properly
 with all the g++ compiler I used (Apple g++ 4.2, MacPorts g++ 4.4, 4.5,
 4.6, 4.7) on my machine (2010 MacBook Pro w/ Mac OS X version 10.6.8).
 These compilers try to use `boost::get()` from
 `/opt/local/include/boost/graph/reverse_graph.hpp` instead of
 `boost::get()` from `/opt/local/include/boost/variant/get.hpp`, leading to
 this kind of error messages:

 {{{
 % g++-mp-4.7 -I/opt/local/include boost-get-test-ko.cc
 In file included from
 /opt/local/include/boost/graph/vector_as_graph.hpp:23:0,
                  from
 /opt/local/include/boost/graph/transitive_closure.hpp:17,
                  from boost-get-test-ko.cc:2:
 /opt/local/include/boost/graph/graph_traits.hpp: In instantiation of
 'struct boost::graph_traits<int>':
 /opt/local/include/boost/graph/reverse_graph.hpp:472:1:   required by
 substitution of 'template<class Graph, class GRef> typename
 boost::graph_traits<Graph>::edge_descriptor
 boost::get(boost::edge_underlying_t, const
 boost::reverse_graph<BidirectionalGraph, GraphRef>&, const typename
 boost::graph_traits<boost::reverse_graph<BidirectionalGraph, GraphRef>
 >::edge_descriptor&) [with Graph = int; GRef = <missing>]'
 boost-get-test-ko.cc:7:28:   required from here
 /opt/local/include/boost/graph/graph_traits.hpp:30:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:31:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:32:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:33:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:34:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:35:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:36:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:38:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:39:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:40:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:42:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:43:52: error: 'int' is not
 a class, struct, or union type
 /opt/local/include/boost/graph/graph_traits.hpp:44:52: error: 'int' is not
 a class, struct, or union type
 }}}


 If the `#include <boost/graph/transitive_closure.hpp>` statement is
 removed (see attached file `boost-get-test-ok.cc`, no compiling error
 arises.

 The versions of `clang++` I tried (MacPorts clang++ 2.9, 3.0 and 3.1) have
 no trouble compiling both files.

-- 
Ticket URL: <https://trac.macports.org/ticket/34227>
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