Andrew Sutton escribió:

The attached test case fails to compile. If it is a bug I would be happy to open a ticket for it! Could somebody please confirm?

What about it fails? I compiled it with both function_requires uncommented and it worked just fine. What [compiler|os|boost] is this failing under.

Hi Andrew, The problem is reproducible with all compilers that I have access to: gcc-4.1.2 and gcc-3.4.6-5 (Debian, boost 1.39.0) The error message: "/usr/usuaris/doctorat/dmitry/include/boost_1_39_0/boost/property_map.hpp:161: error: assignment of read-only data-member `boost::ReadablePropertyMapConcept<main()::cWeightMap, main()::Edge>::val'" MSVS 2005, Windows XP, boost 1.37.0: d:\boost\boost_1_37_0\boost\property_map.hpp(162) : error C2166: l-value specifies const object d:\boost\boost_1_37_0\boost\property_map.hpp(159) : while compiling class template member function 'void boost::ReadablePropertyMapConcept<PMap,Key>::constraints(void)' with [ PMap=cWeightMap, Key=Edge ] Dmitry

Andrew Sutton wrote:

Hi Andrew,

The problem is reproducible with all compilers that I have access to: gcc-4.1.2 and gcc-3.4.6-5 (Debian, boost 1.39.0) The error message: "/usr/usuaris/doctorat/dmitry/include/boost_1_39_0/boost/property_map.hpp:161: error: assignment of read-only data-member `boost::ReadablePropertyMapConcept<main()::cWeightMap, main()::Edge>::val'"

This should fail for any version of Boost < 1.40. The cosnt_type generator causes the property map to be generated with cosnt value_type, which causes the problem. This has been fixed in trunk.

Ok. Thanks! Dmitry