test/CXX/class/class.mem/p2.cpp


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// RUN: %clang_cc1 -fsyntax-only -verify %s 

// C++11 [class.mem]p2:
//   A class is considered a completely-defined object type (or
//   complete type) at the closing } of the class-specifier. Within
//   the class member-specification, the class is regarded as complete
//   within function bodies, default arguments,
//   exception-specifications, and brace-or-equal-initializers for
//   non-static data members (including such things in nested classes).
//   Otherwise it is regarded as incomplete within its own class
//   member-specification.

namespace test0 {
  struct A { // expected-note {{definition of 'test0::A' is not complete until the closing '}'}}
    A x; // expected-error {{field has incomplete type 'test0::A'}}
  };
}

namespace test1 {
  template <class T> struct A {
    A<int> x; // expected-error {{implicit instantiation of template 'test1::A<int>' within its own definition}}
  };
}

namespace test2 {
  template <class T> struct A;
  template <> struct A<int> {};
  template <class T> struct A {
    A<int> x;
  };
}