#ifdef EXPOSE_GCC_BUG
template <int n>
class pow3 {
public:
static int const result = 3 * pow3<n-1>::result;
};
template <>
class pow3<0> {
public:
static int const result = 1;
};
#else
template <int n>
class pow3 {
public:
enum { result = 3 * pow3<n-1>::result };
};
template <>
class pow3<0> {
public:
enum { result = 1 };
};
#endif
extern void foo(const int& x);
int main()
{
foo(pow3<3>::result);
return 0;
}
g++ power.cpp -o power -DEXPOSE_GCC_BUG
(...)
power.cpp: undefined reference to `pow3<(int)3>::result'
^^^^^^^^^^^^^^^^^^^^
(...)
gcc must instantiate pow3<3> and pass it by ref to foo().
[ this example becomes from the Nicolai M. Josuttis book. ]
--
Summary: gcc doesn't work for templates with `static const`
members.
Product: gcc
Version: 4.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassigned at gcc dot gnu dot org
ReportedBy: pluto at agmk dot net
GCC build triplet: *-linux
GCC host triplet: *-linux
GCC target triplet: *-linux
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=25108
