This has come up in the development of a new library - flecxx; zero-cost flexibility for standard libraries - that I'm hoping to 0.1-launch this month. DMC++ is the only compiler that has any kind of problems with what I'm trying to do. Hopefully the bug is something very simple, and a fix can be effected reasonably quickly.

The problem manifests even with one level of namespace
(dmc_ns_bug_small.cpp); I've submitted both because it's imperative for
flecxx that the two-level one (dmc_ns_bug.cpp) works.

Compilation of the "small" version gives:

P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(221)
: Error: namespace 'ns1' does not enclose member '?0' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(222)
: Error: undefined identifier 'ios_base'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(228)
: Error: namespace 'ns1' does not enclose member '?0' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(231)
: Error: namespace 'ns1' does not enclose member '?1' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(233)
: Error: namespace 'ns1' does not enclose member '?B_N' of namespace 'std
'
Fatal error: too many errors
--- errorlevel 1

Compilation of the two-level version gives:

P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(221)
: Error: namespace 'ns2' does not enclose member '?0' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(222)
: Error: undefined identifier 'ios_base'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(228)
: Error: namespace 'ns2' does not enclose member '?0' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(231)
: Error: namespace 'ns2' does not enclose member '?1' of namespace 'std'
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(233)
: Error: namespace 'ns2' does not enclose member '?B_N' of namespace 'std
'
Fatal error: too many errors
--- errorlevel 1


Cheers

Matt

I had a similar problem. The only solution I found, was to declare the class that used the std::* outside the namespace, then inherit or typedef it inside the namespace, for example:

#include <fstream>

template< typename C, typename T >
class basic_fstream_outside : public ::std::basic_fstream<C, T>{};
namespace ns1
{
    template<   typename C
            ,   typename T
            >
    class basic_fstream
        : public ::basic_fstream_outside<C, T>
    {};

    typedef ::ns1::basic_fstream<char, ::std::char_traits<char> >  fstream;

} // namespace ns1


void main()
{
    ns1::fstream stm;
}
___________________________

I didn't test this out with fstream, rather the problem occurred with std::map. std::string did not have this problem.

Any news on this? I'm about to launch flecxx in next week or so, and it'd be nice not to have to #error on DMC++ for some of the components.

Cheers

Matt

"Matthew Wilson" <matthew@hat.stlsoft.dot.org> wrote in message news:fgl6jq$2mia$1@digitalmars.com...
> This has come up in the development of a new library - flecxx; zero-cost flexibility for standard libraries - that I'm hoping to 0.1-launch this month. DMC++ is the only compiler that has any kind of problems with what I'm trying to do. Hopefully the bug is something very simple, and a fix
can
> be effected reasonably quickly.
>
> The problem manifests even with one level of namespace
> (dmc_ns_bug_small.cpp); I've submitted both because it's imperative for
> flecxx that the two-level one (dmc_ns_bug.cpp) works.
>
> Compilation of the "small" version gives:
>
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(221)
> : Error: namespace 'ns1' does not enclose member '?0' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(222)
> : Error: undefined identifier 'ios_base'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(228)
> : Error: namespace 'ns1' does not enclose member '?0' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(231)
> : Error: namespace 'ns1' does not enclose member '?1' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(233)
> : Error: namespace 'ns1' does not enclose member '?B_N' of namespace 'std
> '
> Fatal error: too many errors
> --- errorlevel 1
>
> Compilation of the two-level version gives:
>
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(221)
> : Error: namespace 'ns2' does not enclose member '?0' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(222)
> : Error: undefined identifier 'ios_base'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(228)
> : Error: namespace 'ns2' does not enclose member '?0' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(231)
> : Error: namespace 'ns2' does not enclose member '?1' of namespace 'std'
>
P:\Programs\dm\Libraries\STL\STLport-4.5\stlport\stlport\stl/_istream.h(233)
> : Error: namespace 'ns2' does not enclose member '?B_N' of namespace 'std
> '
> Fatal error: too many errors
> --- errorlevel 1
>
>
> Cheers
>
> Matt
>
>
>