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

   1 // RUN: %clang_cc1 -fsyntax-only -verify -std=c++11 %s
   2
   3 // C++11 [class.mem]p2:
   4 //   A class is considered a completely-defined object type (or
   5 //   complete type) at the closing } of the class-specifier. Within
   6 //   the class member-specification, the class is regarded as complete
   7 //   within function bodies, default arguments,
   8 //   exception-specifications, and brace-or-equal-initializers for
   9 //   non-static data members (including such things in nested classes).
  10 //   Otherwise it is regarded as incomplete within its own class
  11 //   member-specification.
  12
  13 namespace test0 {
  14   struct A { // expected-note {{definition of 'test0::A' is not complete until the closing '}'}}
  15     A x; // expected-error {{field has incomplete type 'A'}}
  16   };
  17 }
  18
  19 namespace test1 {
  20   template <class T> struct A {
  21     A<int> x; // expected-error {{implicit instantiation of template 'test1::A<int>' within its own definition}}
  22   };
  23 }
  24
  25 namespace test2 {
  26   template <class T> struct A;
  27   template <> struct A<int> {};
  28   template <class T> struct A {
  29     A<int> x;
  30   };
  31 }
  32
  33 namespace test3 {
  34   struct A {
  35     struct B {
  36       void f() throw(A);
  37       void g() throw(B);
  38     };
  39
  40     void f() throw(A);
  41     void g() throw(B);
  42   };
  43
  44   template<typename T>
  45   struct A2 {
  46     struct B {
  47       void f1() throw(A2);
  48       void f2() throw(A2<T>);
  49       void g() throw(B);
  50     };
  51
  52     void f1() throw(A2);
  53     void f2() throw(A2<T>);
  54     void g() throw(B);
  55   };
  56
  57   template struct A2<int>;
  58 }
  59
  60 namespace PR12629 {
  61   struct S {
  62     static int (f)() throw();
  63     static int ((((((g))))() throw(U)));
  64     int (*h)() noexcept(false);
  65     static int (&i)() noexcept(true);
  66     static int (*j)() throw(U); // expected-error {{unknown type name 'U'}}
  67     static int (k)() throw(U);
  68
  69     struct U {};
  70   };
  71   static_assert(noexcept(S::f()), "");
  72   static_assert(!noexcept(S::g()), "");
  73   static_assert(!noexcept(S().h()), "");
  74   static_assert(noexcept(S::i()), "");
  75 }
  76
  77 namespace PR12688 {
  78   struct S {
  79     // FIXME: Maybe suppress the "constructor cannot have a return type" error
  80     // if the return type is invalid.
  81     nonsense S() throw (more_nonsense); // \
  82     // expected-error {{'nonsense'}} \
  83     // expected-error {{constructor cannot have a return type}}
  84   };
  85 }