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293 lines
9.2 KiB
293 lines
9.2 KiB
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -verify %s
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template<typename S>
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struct A {
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typedef S B;
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template<typename T> using C = typename T::B;
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template<typename T> struct D {
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template<typename U> using E = typename A<U>::template C<A<T>>;
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template<typename U> using F = A<E<U>>;
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template<typename U> using G = C<F<U>>;
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G<T> g;
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};
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typedef decltype(D<B>().g) H;
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D<H> h;
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template<typename T> using I = A<decltype(h.g)>;
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template<typename T> using J = typename A<decltype(h.g)>::template C<I<T>>;
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};
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A<int> a;
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A<char>::D<double> b;
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template<typename T> T make();
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namespace X {
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template<typename T> struct traits {
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typedef T thing;
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typedef decltype(val(make<thing>())) inner_ptr;
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template<typename U> using rebind_thing = typename thing::template rebind<U>;
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template<typename U> using rebind = traits<rebind_thing<U>>;
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inner_ptr &&alloc();
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void free(inner_ptr&&);
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};
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template<typename T> struct ptr_traits {
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typedef T *type;
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};
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template<typename T> using ptr = typename ptr_traits<T>::type;
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template<typename T> struct thing {
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typedef T inner;
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typedef ptr<inner> inner_ptr;
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typedef traits<thing<inner>> traits_type;
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template<typename U> using rebind = thing<U>;
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thing(traits_type &traits) : traits(traits), val(traits.alloc()) {}
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~thing() { traits.free(static_cast<inner_ptr&&>(val)); }
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traits_type &traits;
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inner_ptr val;
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friend inner_ptr val(const thing &t) { return t.val; }
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};
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template<> struct ptr_traits<bool> {
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typedef bool &type;
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};
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template<> bool &traits<thing<bool>>::alloc() { static bool b; return b; }
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template<> void traits<thing<bool>>::free(bool&) {}
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}
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typedef X::traits<X::thing<int>> itt;
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itt::thing::traits_type itr;
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itt::thing ith(itr);
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itt::rebind<bool> btr;
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itt::rebind_thing<bool> btt(btr);
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namespace PR11848 {
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template<typename T> using U = int;
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template<typename T, typename ...Ts>
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void f1(U<T> i, U<Ts> ...is) { // expected-note 2{{couldn't infer template argument 'T'}}
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return i + f1<Ts...>(is...);
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}
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template<typename ...Ts>
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void f2(U<Ts> ...is) { } // expected-note {{deduced incomplete pack <(no value)> for template parameter 'Ts'}}
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template<typename...> struct type_tuple {};
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template<typename ...Ts>
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void f3(type_tuple<Ts...>, U<Ts> ...is) {} // expected-note {{deduced packs of different lengths for parameter 'Ts' (<void, void, void> vs. <(no value), (no value)>)}}
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void g() {
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f1(U<void>()); // expected-error {{no match}}
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f1(1, 2, 3, 4, 5); // expected-error {{no match}}
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f2(); // ok
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f2(1); // expected-error {{no match}}
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f3(type_tuple<>());
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f3(type_tuple<void, void, void>(), 1, 2); // expected-error {{no match}}
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f3(type_tuple<void, void, void>(), 1, 2, 3);
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}
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template<typename ...Ts>
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struct S {
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S(U<Ts>...ts);
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};
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template<typename T>
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struct Hidden1 {
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template<typename ...Ts>
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Hidden1(typename T::template U<Ts> ...ts);
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};
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template<typename T, typename ...Ts>
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struct Hidden2 {
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Hidden2(typename T::template U<Ts> ...ts);
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};
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struct Hide {
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template<typename T> using U = int;
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};
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Hidden1<Hide> h1;
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Hidden2<Hide, double, char> h2(1, 2);
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}
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namespace Core22036 {
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struct X {};
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void h(...);
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template<typename T> using Y = X;
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template<typename T, typename ...Ts> struct S {
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// An expression can contain an unexpanded pack without being type or
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// value dependent. This is true even if the expression's type is a pack
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// expansion type.
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void f1(Y<T> a) { h(g(a)); } // expected-error {{undeclared identifier 'g'}}
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void f2(Y<Ts>...as) { h(g(as)...); } // expected-error {{undeclared identifier 'g'}}
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void f3(Y<Ts>...as) { g(as...); } // ok
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void f4(Ts ...ts) { h(g(sizeof(ts))...); } // expected-error {{undeclared identifier 'g'}}
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// FIXME: We can reject this, since it has no valid instantiations because
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// 'g' never has any associated namespaces.
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void f5(Ts ...ts) { g(sizeof(ts)...); } // ok
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};
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}
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namespace PR13243 {
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template<typename A> struct X {};
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template<int I> struct C {};
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template<int I> using Ci = C<I>;
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template<typename A, int I> void f(X<A>, Ci<I>) {}
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template void f(X<int>, C<0>);
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}
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namespace PR13136 {
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template <typename T, T... Numbers>
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struct NumberTuple { };
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template <unsigned int... Numbers>
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using MyNumberTuple = NumberTuple<unsigned int, Numbers...>;
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template <typename U, unsigned int... Numbers>
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void foo(U&&, MyNumberTuple<Numbers...>);
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template <typename U, unsigned int... Numbers>
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void bar(U&&, NumberTuple<unsigned int, Numbers...>);
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int main() {
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foo(1, NumberTuple<unsigned int, 0, 1>());
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bar(1, NumberTuple<unsigned int, 0, 1>());
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return 0;
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}
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}
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namespace PR16646 {
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namespace test1 {
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template <typename T> struct DefaultValue { const T value=0;};
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template <typename ... Args> struct tuple {};
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template <typename ... Args> using Zero = tuple<DefaultValue<Args> ...>;
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template <typename ... Args> void f(const Zero<Args ...> &t);
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void f() {
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f(Zero<int,double,double>());
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}
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}
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namespace test2 {
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template<int x> struct X {};
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template <template<int x> class temp> struct DefaultValue { const temp<0> value; };
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template <typename ... Args> struct tuple {};
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template <template<int x> class... Args> using Zero = tuple<DefaultValue<Args> ...>;
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template <template<int x> class... Args> void f(const Zero<Args ...> &t);
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void f() {
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f(Zero<X,X,X>());
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}
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}
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}
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namespace PR16904 {
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template <typename,typename>
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struct base {
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template <typename> struct derived;
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};
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// FIXME: The diagnostics here are terrible.
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template <typename T, typename U, typename V>
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using derived = base<T, U>::template derived<V>; // expected-error {{expected a type}} expected-error {{expected ';'}}
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template <typename T, typename U, typename V>
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using derived2 = ::PR16904::base<T, U>::template derived<V>; // expected-error {{expected a type}} expected-error {{expected ';'}}
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}
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namespace PR14858 {
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template<typename ...T> using X = int[sizeof...(T)];
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template<typename ...U> struct Y {
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using Z = X<U...>;
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};
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using A = Y<int, int, int, int>::Z;
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using A = int[4];
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// FIXME: These should be treated as being redeclarations.
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template<typename ...T> void f(X<T...> &) {}
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template<typename ...T> void f(int(&)[sizeof...(T)]) {}
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template<typename ...T> void g(X<typename T::type...> &) {}
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template<typename ...T> void g(int(&)[sizeof...(T)]) {} // ok, different
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template<typename ...T, typename ...U> void h(X<T...> &) {}
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template<typename ...T, typename ...U> void h(X<U...> &) {} // ok, different
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template<typename ...T> void i(auto (T ...t) -> int(&)[sizeof...(t)]);
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auto mk_arr(int, int) -> int(&)[2];
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void test_i() { i<int, int>(mk_arr); }
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#if 0 // FIXME: This causes clang to assert.
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template<typename ...T> using Z = auto (T ...p) -> int (&)[sizeof...(p)];
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template<typename ...T, typename ...U> void j(Z<T..., U...> &) {}
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void test_j() { j<int, int>(mk_arr); }
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#endif
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template<typename ...T> struct Q {
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template<typename ...U> using V = int[sizeof...(U)];
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template<typename ...U> void f(V<typename U::type..., typename T::type...> *);
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};
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struct B { typedef int type; };
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void test_q(int (&a)[5]) { Q<B, B, B>().f<B, B>(&a); }
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}
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namespace redecl {
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template<typename> using A = int;
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template<typename = void> using A = int;
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A<> a; // ok
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}
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namespace PR31514 {
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template<typename T, typename> using EnableTupleSize = T;
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template<typename T> struct tuple_size { static const int value = 0; };
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template<typename T> struct tuple_size<EnableTupleSize<const T, decltype(tuple_size<T>::value)>> {};
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template<typename T> struct tuple_size<EnableTupleSize<volatile T, decltype(tuple_size<T>::value)>> {};
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tuple_size<const int> t;
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}
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namespace an_alias_template_is_not_a_class_template {
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template<typename T> using Foo = int; // expected-note 3{{here}}
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Foo x; // expected-error {{use of alias template 'Foo' requires template arguments}}
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Foo<> y; // expected-error {{too few template arguments for alias template 'Foo'}}
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int z = Foo(); // expected-error {{use of alias template 'Foo' requires template arguments}}
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template<template<typename> class Bar> void f() { // expected-note 3{{here}}
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Bar x; // expected-error {{use of template template parameter 'Bar' requires template arguments}}
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Bar<> y; // expected-error {{too few template arguments for template template parameter 'Bar'}}
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int z = Bar(); // expected-error {{use of template template parameter 'Bar' requires template arguments}}
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}
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}
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namespace resolved_nttp {
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template <typename T> struct A {
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template <int N> using Arr = T[N];
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Arr<3> a;
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};
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using TA = decltype(A<int>::a);
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using TA = int[3];
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template <typename T> struct B {
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template <int... N> using Fn = T(int(*...A)[N]);
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Fn<1, 2, 3> *p;
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};
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using TB = decltype(B<int>::p);
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using TB = int (*)(int (*)[1], int (*)[2], int (*)[3]);
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template <typename T, int ...M> struct C {
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template <T... N> using Fn = T(int(*...A)[N]);
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Fn<1, M..., 4> *p; // expected-error-re 3{{evaluates to {{[234]}}, which cannot be narrowed to type 'bool'}}
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};
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using TC = decltype(C<int, 2, 3>::p);
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using TC = int (*)(int (*)[1], int (*)[2], int (*)[3], int (*)[4]);
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using TC2 = decltype(C<bool, 2, 3>::p); // expected-note {{instantiation of}}
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}
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