clang/test/SemaCXX/many-template-parameter-lists.cpp

   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
  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 }