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// PR c++/84496
// { dg-do compile { target c++14 } }
template <typename T, T n> struct C { static constexpr T D = n; };
struct E : C<bool, false> {};
template <typename> struct F : C<bool, false> {};
template <typename T> T foo ();
template <typename> struct H { typedef int G; };
template <typename> class I;
struct L;
template <typename, typename> struct J;
template <bool, bool, typename...> struct K;
struct R {
template <typename M, typename... N>
static J<decltype (foo<M> () (foo<N>...)), L> o;
};
template <typename P, typename... Q> struct K<false, false, P, Q...> : R {
typedef decltype (o<P, Q...>) G;
};
template <typename P, typename... Q>
struct D : K<E::D, F<typename H<P>::G>::D, P, Q...> {};
template <typename P, typename... Q> struct I<P (Q...)> : D<P, Q...> {};
template <typename> class function;
template <typename S, typename... Q> struct function<S (Q...)> {
template <typename T, typename = typename I<T (Q...)>::G> struct C;
template <typename, typename> using U = int;
template <typename P, typename = U<int, void>, typename = U<C<P>, void>>
function (P);
};
template <typename S, typename... Q>
template <typename P, typename, typename>
function<S (Q...)>::function (P)
{
}
void bar (function<void (int)>);
void
baz ()
{
auto a = [] {
static int counter;
bar ([] (auto) { counter++; });
};
}
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