http://gcc.gnu.org/bugzilla/show_bug.cgi?id=55998
Bug #: 55998
Summary: 'integral expression .. is not constant' when
instantiating template alias in a template using a
parameter of an encapsulating template
Classification: Unclassified
Product: gcc
Version: 4.8.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: c++
AssignedTo: unassig...@gcc.gnu.org
ReportedBy: m-ou...@m-ou.se
---- Test case ----
template<int N> struct A {};
template<int N> using B = A<N>;
template<int N> struct C {
template<int> void x(B<N-1>) {}
};
int main() { C<4> x; }
-----
g++ version 4.8.0 20120314: Compiles fine. No errors.
g++ version 4.8.0 20121221: error: integral expression '(4 - 1)' is not
constant
