0f6ed4c394
The most recent declaration of a template as a friend can introduce a different template parameter depth compared to what we anticipate from a CTAD guide. Fixes https://github.com/llvm/llvm-project/issues/86769
57 lines
1.1 KiB
C++
57 lines
1.1 KiB
C++
// RUN: %clang_cc1 -std=c++17 -verify %s
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namespace pr41427 {
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template <typename T> class A {
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public:
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A(void (*)(T)) {}
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};
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void D(int) {}
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void f() {
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A a(&D);
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using T = decltype(a);
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using T = A<int>;
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}
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}
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namespace Access {
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struct B {
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protected:
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struct type {};
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};
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template<typename T> struct D : B { // expected-note {{not viable}}
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D(T, typename T::type); // expected-note {{private member}}
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};
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D b = {B(), {}};
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class X {
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using type = int;
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};
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D x = {X(), {}}; // expected-error {{no viable constructor or deduction guide}}
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// Once we implement proper support for dependent nested name specifiers in
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// friends, this should still work.
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class Y {
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template <typename T> friend D<T>::D(T, typename T::type); // expected-warning {{dependent nested name specifier}}
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struct type {};
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};
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D y = {Y(), {}};
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class Z {
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template <typename T> friend class D;
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struct type {};
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};
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D z = {Z(), {}};
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}
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namespace GH69987 {
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template<class> struct X {};
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template<class = void> struct X;
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X x;
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template<class T, class B> struct Y { Y(T); };
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template<class T, class B=void> struct Y ;
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Y y(1);
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}
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