Problem with nested classes and templates

[Wolfgang Bangerth]

Hi there,

  When working with egcs 1.1b, I noticed the following
problem. Given this program:

-------------------------------------------------------
template <int rank, int dim> class Outer;

template <int dim>
class Outer<1,dim> {
  public:
    Outer ();

    
    class Inner {
      public:
	Inner (){};
    };
};


template <int dim>
Outer<1,dim>::Outer () {
  Inner a;
};



Outer<1,3> o;
--------------------------------------------------------

egcs says to me:
    a.cc: In instantiation of `Outer<1,3>::Inner::Inner<1>()':
    a.cc:18:   instantiated from `Outer<1,3>::Outer<3>()'
    a.cc:23:   instantiated from here
    a.cc:11: new declaration `Outer<1,1>::Inner::Inner<>()'
    a.cc:11: ambiguates old declaration `Outer<1,3>::Inner::Inner<1>()'

Apart from the fact that I do not understand what it's all about,
it looks strange that in the two last lines
  Outer<1,1>:: ... <>
and
  Outer<1,3>:: ... <1>
are compared.

Anyway, egcs is great and many thanks go to you for your efforts!

-- Wolfgang





-------------------------------------------------------------------
wolf@nike$ c++ -v -c a.cc 
Reading specs from /usr/local/gcc/egcs-1.1b/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/specs
gcc version egcs-2.91.57 19980901 (egcs-1.1 release)
 /usr/local/gcc/egcs-1.1b/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/cpp -lang-c++ -v -undef -D__GNUC__=2 -D__GNUG__=2 -D__cplusplus -D__GNUC_MINOR__=91 -Dsparc -Dsun -Dunix -D__svr4__ -D__SVR4 -D__sparc__ -D__sun__ -D__unix__ -D__svr4__ -D__SVR4 -D__s
parc -D__sun -D__unix -Asystem(unix) -Asystem(svr4) -D__EXCEPTIONS -D__GCC_NEW_VARARGS__ -Acpu(sparc) -Amachine(sparc) a.cc /var/tmp/ccvaOh7F.ii
GNU CPP version egcs-2.91.57 19980901 (egcs-1.1 release) (sparc)
#include "..." search starts here:
#include <...> search starts here:
 /usr/local/gcc/egcs-1.1b/include/g++
 /usr/local/include
 /usr/local/gcc/egcs-1.1b/sparc-sun-solaris2.6/include
 /usr/local/gcc/egcs-1.1b/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/include
 /usr/include
End of search list.
 /usr/local/gcc/egcs-1.1b/lib/gcc-lib/sparc-sun-solaris2.6/egcs-2.91.57/cc1plus /var/tmp/ccvaOh7F.ii -quiet -dumpbase a.cc -version -o /var/tmp/ccA63BRe.s
GNU C++ version egcs-2.91.57 19980901 (egcs-1.1 release) (sparc-sun-solaris2.6) compiled by GNU C version egcs-2.91.57 19980901 (egcs-1.1 release).