1 // RUN: %clang_cc1 -fsyntax-only -verify %s
2
3 // This is not well-formed C++ but used to crash in sema.
4
5 template <class T>
6 struct X {
7 template <class U>
8 struct A { // expected-note {{not-yet-instantiated member is declared here}}
9 template <class V>
10 struct B {
11 template <class W>
12 struct C {
13 template <class X>
14 struct D {
15 template <class Y>
16 struct E {
17 template <class Z>
18 void operator+=(Z);
19 };
20 };
21 };
22 };
23 };
24
25 template <class U>
26 template <class V>
27 template <class W>
28 template <class X>
29 template <class Y>
30 template <class Z>
31 friend void A<U>::template B<V>::template C<W>::template D<X>::template E<Y>::operator+=(Z); // expected-warning {{not supported}} expected-error {{no member 'A' in 'X<int>'; it has not yet been instantiated}}
32 };
33
test()34 void test() {
35 X<int>::A<int>::B<int>::C<int>::D<int>::E<int>() += 1.0; // expected-note {{in instantiation of template class 'X<int>' requested here}}
36 }
37