[Boost-users] Boost.Tribool: GCC4 and anonymous enums

From: Alo Sarv (alo17_at_[hidden])
Date: 2005-06-01 13:06:10

GCC4 seems to be rather picky on anonymous enums, and some code seems to 
break in logic/tribool.hpp with the following error:

boost/logic/tribool.hpp: In member function 
`boost::logic::tribool::operator void 
(boost::logic::tribool::dummy::*)()() const':
boost/boost/logic/tribool.hpp:114: error: 
`boost::logic::tribool::<anonymous enum>' is/uses anonymous type
boost/boost/logic/tribool.hpp:114: error:   trying to instantiate 
`template<class T> struct boost::is_integral'
boost/boost/logic/tribool.hpp:114: error: 
`boost::logic::tribool::<anonymous enum>' is/uses anonymous type
boost/boost/logic/tribool.hpp:114: error:   trying to instantiate 
`template<class T> struct boost::is_integral'

Same error is repeated at lines 128, 161, and 162 (CVS HEAD).

Workaround/patch is obvious (making the enum named), but I haven't 
managed to create a minimal test-case for the behaviour (the triggering 
code is rather large and there doesn't seem to be any logic in what 
actually triggers the error). Any ideas?

Alo Sarv