From: David Abrahams (dave_at_[hidden])
Date: 2006-11-12 12:46:11
Matthias Troyer <troyer_at_[hidden]> writes:
> Hi Beman, hi all
> Due to recent changes to the filesystem library now, the header
> detail/identifier.hpp is now included in my projects and contains the
> dangerous code segment:
Is it just dangerous by definition, because it breaks
your code on your compiler, or is there something else about it that
> template <class Ostream, class Id>
> typename enable_if< is_base_of< identifier< typename
> Id::value_type, Id >, Id >,
> Ostream & >::type operator<<( Ostream & os, const Id & id )
> return os << id.value();
> which breaks all of my codes, since I have a type Id, that has a type
> member Id::value_type which is an abstract base class. My compiler
> (Apple gcc-4.0) now tries to instantiate identifier< typename
> Id::value_type, Id >, which fails because Id::value_type is abstract,
> and the compiler aborts with an error message.
Is that a compiler bug?
Is your Id in namespace boost?
> This causes all of our codes to fail to compile with the current CVS
That's a problem.
-- Dave Abrahams Boost Consulting www.boost-consulting.com
Boost list run by bdawes at acm.org, gregod at cs.rpi.edu, cpdaniel at pacbell.net, john at johnmaddock.co.uk