40 lines
717 B
C++
40 lines
717 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
|
|
// expected-no-diagnostics
|
|
|
|
// template<unsigned M, unsigned N>
|
|
// struct Ackermann {
|
|
// enum {
|
|
// value = M ? (N ? Ackermann<M-1, Ackermann<M, N-1> >::value
|
|
// : Ackermann<M-1, 1>::value)
|
|
// : N + 1
|
|
// };
|
|
// };
|
|
|
|
template<unsigned M, unsigned N>
|
|
struct Ackermann {
|
|
enum {
|
|
value = Ackermann<M-1, Ackermann<M, N-1>::value >::value
|
|
};
|
|
};
|
|
|
|
template<unsigned M> struct Ackermann<M, 0> {
|
|
enum {
|
|
value = Ackermann<M-1, 1>::value
|
|
};
|
|
};
|
|
|
|
template<unsigned N> struct Ackermann<0, N> {
|
|
enum {
|
|
value = N + 1
|
|
};
|
|
};
|
|
|
|
template<> struct Ackermann<0, 0> {
|
|
enum {
|
|
value = 1
|
|
};
|
|
};
|
|
|
|
int g0[Ackermann<3, 4>::value == 125 ? 1 : -1];
|
|
|