------- Additional Comments From jakub at gcc dot gnu dot org  2005-09-02 13:05 -------
I can reproduce it on a (freshly updated) stock gcc-4_0-branch:
./cc1plus --version; ./cc1plus -quiet -m32 testcase.ii
GNU C++ version 4.0.2 20050902 (prerelease) (x86_64-unknown-linux-gnu)
        compiled by GNU C version 4.0.1 20050727 (Red Hat 4.0.1-5).
GGC heuristics: --param ggc-min-expand=98 --param ggc-min-heapsize=127988
/usr/include/boost/detail/sp_counted_impl.hpp: In member function irtual void*
boost::detail::sp_counted_impl_pd<P, D>::get_deleter(const std::type_info&)':
/usr/include/boost/detail/sp_counted_impl.hpp:147: error:
pl_::bool_<false>::value' is not a valid template argument for type
ool' because it is a non-constant expression
/usr/include/boost/detail/sp_counted_impl.hpp:147: error:
pl_::bool_<false>::value' is not a valid template argument for type
ool' because it is a non-constant expression
../inc/layermanager.hxx: In member function oid
presentation::internal::LayerManager::forEachShape(const Functor&) const':
../inc/layermanager.hxx:299: error: pl_::bool_<false>::value' is not a valid
template argument for type ool' because it is a non-constant expression
../inc/layermanager.hxx:299: error: pl_::bool_<false>::value' is not a valid
template argument for type ool' because it is a non-constant expression
../inc/layermanager.hxx: In member function oid
presentation::internal::LayerManager::forEachShape(const Functor&)':
../inc/layermanager.hxx:333: error: pl_::bool_<false>::value' is not a valid
template argument for type ool' because it is a non-constant expression
../inc/layermanager.hxx:333: error: pl_::bool_<false>::value' is not a valid
template argument for type ool' because it is a non-constant expression

FYI, gcc/cp/ of gcc-4_0-branch and gcc-4_0-rhl-branch is identical.

If I revert http://gcc.gnu.org/ml/gcc-cvs/2005-08/msg00946.html
(aka PR c++/23099 fix), the problem goes away.

-- 
           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |UNCONFIRMED
         Resolution|INVALID                     |
            Summary|‘mpl_::bool_<false>::value|`mpl_::bool_<false>::value'
                   |’ is not a valid template |is not a valid template
                   |argument for type ‘bool’|argument for type `bool'
                   |because it is a non-constant|because it is a non-constant
                   |expression                  |expression


http://gcc.gnu.org/bugzilla/show_bug.cgi?id=23691