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// PR c++/53401
// { dg-do compile { target c++11 } }
template<int I>
struct index
{};
constexpr int recursive_impl(index<0u>)
{
return 0;
}
template<int N>
constexpr auto recursive_impl(index<N>)
-> decltype(recursive_impl(index<N - 1>())) // { dg-error "depth" }
{
return recursive_impl(index<N - 1>());
}
template<int N>
constexpr auto recursive()
-> decltype(recursive_impl(index<N>()))
{
return recursive_impl(index<N>());
}
void f(int i)
{
recursive<1>(); // { dg-message "from here" }
}
// { dg-prune-output "compilation terminated" }
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