A third-party library I'm using doesn't compile with gcc 4.1.1 anymore (it
still did with 4.0). The problem is that some header files contain a code
fragment (I've stripped it down) like this:
#include <iostream>
using namespace std;
template <class F, class R> class I {
public:
int size;
};
template <class T> class D : private I<T, double> {
using D< T >::size;
};
int main() {
D<double> test;
cout << "Hello world" << endl;
}
gcc 4.1.1 generates the following error:
test.cpp: In instantiation of 'D<double>':
test.cpp:15: instantiated from here
test.cpp:11: error: type 'D<double>' is not a base type for type 'D<double>'
gcc 4.0 doesn't see any problem.
I'm not sure this kind of construct is valid. If "using D< T >::size;" is
replaced by "using I< T, double >::size;" gcc 4.1.1 is happy again.
My system is Mac OS X 10.4.7 (PowerPC).
gcc was compiled with darwinports:
"Using built-in specs.
Target: powerpc-apple-darwin8.7.0
Configured with: ../gcc-4.1.1/configure --prefix=/opt/local
--enable-languages=c,c++,java,objc,obj-c++,fortran
--libdir=/opt/local/lib/gcc41 --includedir=/opt/local/include/gcc41
--infodir=/opt/local/share/info --mandir=/opt/local/share/man
--with-local-prefix=/opt/local --with-system-zlib --disable-nls
--program-suffix=-dp-4.1 --with-gxx-include-dir=/opt/local/include/gcc41/c++/
--with-gmp=/opt/local --with-mpfr=/opt/local --with-as=/opt/local/bin/odas
--with-ld=/opt/local/bin/odld --with-ar=/opt/local/bin/odar --disable-multilib
Thread model: posix
gcc version 4.1.1
"
The command used to compile was simply "g++ test.cpp"
The library that contains the code fragments is EO (Evolutionary algorithms,
http://www2.lifl.fr/~cahon/paradisEO/eo/index.html)
Thx,
Werner Van Geit
--
Summary: gcc 4.1.1 rejects possible valid code containing the
"using" keyword
Product: gcc
Version: 4.1.1
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: wernervangeit at hotmail dot com
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=28836
