39 lines
690 B
C++
39 lines
690 B
C++
// RUN: %clang_cc1 -fsyntax-only -verify %s
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// template<unsigned M, unsigned N>
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// struct Ackermann {
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// enum {
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// value = M ? (N ? Ackermann<M-1, Ackermann<M, N-1> >::value
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// : Ackermann<M-1, 1>::value)
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// : N + 1
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// };
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// };
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template<unsigned M, unsigned N>
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struct Ackermann {
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enum {
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value = Ackermann<M-1, Ackermann<M, N-1>::value >::value
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};
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};
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template<unsigned M> struct Ackermann<M, 0> {
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enum {
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value = Ackermann<M-1, 1>::value
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};
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};
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template<unsigned N> struct Ackermann<0, N> {
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enum {
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value = N + 1
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};
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};
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template<> struct Ackermann<0, 0> {
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enum {
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value = 1
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};
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};
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int g0[Ackermann<3, 4>::value == 125 ? 1 : -1];
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