The code below won't compile. It behaves as though the line
class val { friend class rec; } is erroneously declaring a 'struct rec' in
the global namespace. (Uncomment the other use of rec to see this.) The error
message from 4.0 is:
y.cpp: In function 'int main(int, char**)':
y.cpp:29: error: 'rec' was not declared in this scope
y.cpp:29: error: expected `;' before 'r'
This shows up on 3.4.3, 3.4.4 and 4.0.
David
namespace ns
{
template
class val
{
T get(const unsigned char *data) const;
public:
friend class rec; // see 7.3.1.2
val() { }
};
template<>
inline float val::get(const unsigned char *data) const
{ return *reinterpret_cast(data); }
class rec
{
public:
const unsigned char *data;
};
}
using namespace ns;
int
main(int argc, char **argv)
{
rec r;
//::rec s;
return 0;
}
--
Summary: friend class declaration in namespace wrong in template
class with specialisation
Product: gcc
Version: 4.0.0
Status: UNCONFIRMED
Severity: normal
Priority: P2
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: drtr at dial dot pipex dot com
CC: gcc-bugs at gcc dot gnu dot org
GCC build triplet: x86_64-unknown-linux-gnu
GCC host triplet: x86_64-unknown-linux-gnu
GCC target triplet: x86_64-unknown-linux-gnu
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=20996