I am not positive about this bug report, but I cannot see what G++
wants from me, and in addition all the other compilers I have access
to accept the following code (including 3.4).
----------------------------------------
template < template<typename> class Traits_ >
struct Factory
{
};
template < template<typename> class Traits_>
struct Product
{
template < template<typename> class >
friend class Factory;
};
template<typename Tag_>
struct traits {};
int
main ()
{
Product<traits> ();
}
----------------------------------------
% g++-3.4 -Wall temp2.cc
% g++-snapshot -Wall temp2.cc
temp2.cc: In instantiation of `Product<traits>':
temp2.cc:19: instantiated from here
temp2.cc:1: erreur: template parameter 'template<class> class Traits_'
temp2.cc:8: erreur: redeclared here as 'template<template<class> class Traits_>
template<class> class<template-parameter-1-1>'
% icc -Wall temp2.cc
%
I do not understand the prototype g++ reports. It looks as if it
concatenated the outer template to the inner friend template class.
Environment:
System: Linux nostromo 2.4.27-1-k7-smp #1 SMP Fri Sep 3 06:31:15 UTC 2004 i686
GNU/Linux
Architecture: i686
host: i486-pc-linux-gnu
build: i486-pc-linux-gnu
target: i486-pc-linux-gnu
configured with: ../src/configure -v --enable-languages=c,c++,java,objc,ada
--prefix=/usr/lib/gcc-snapshot --enable-shared --with-system-zlib --enable-nls
--enable-threads=posix --without-included-gettext --disable-werror
--enable-__cxa_atexit --enable-libstdcxx-allocator=mt --enable-clocale=gnu
--enable-libstdcxx-debug --enable-java-gc=boehm --enable-java-awt=gtk i486-linux-gnu
How-To-Repeat:
See above.
------- Additional Comments From akim at epita dot fr 2004-11-02 17:03 -------
Fix:
No idea :)
Unless my code is wrong, but I fail to see the clause in the standard.
--
Summary: template classes that are friends of template classes
Product: gcc
Version: 0.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: akim at epita dot fr
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: i486-pc-linux-gnu
GCC host triplet: i486-pc-linux-gnu
GCC target triplet: i486-pc-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=18276
