clang/test/SemaCXX/ms-interface.cpp

   1 // RUN: %clang_cc1 %s -fsyntax-only -verify -fms-extensions -Wno-microsoft -std=c++11
   2
   3 __interface I1 {
   4   // expected-error@+1 {{user-declared constructor is not permitted within an interface type}}
   5   I1();
   6   // expected-error@+1 {{user-declared destructor is not permitted within an interface type}}
   7   ~I1();
   8   virtual void fn1() const;
   9   // expected-error@+1 {{operator 'operator!' is not permitted within an interface type}}
  10   bool operator!();
  11   // expected-error@+1 {{operator 'operator int' is not permitted within an interface type}}
  12   operator int();
  13   // expected-error-re@+1 {{nested class I1::(unnamed struct at {{.*}}) is not permitted within an interface type}}
  14   struct { int a; };
  15   void fn2() {
  16     struct A { }; // should be ignored: not a nested class
  17   }
  18 protected: // expected-error {{interface types cannot specify 'protected' access}}
  19   typedef void void_t;
  20   using int_t = int;
  21 private:   // expected-error {{interface types cannot specify 'private' access}}
  22   static_assert(true, "oops");
  23 };
  24
  25 __interface I2 {
  26   // expected-error@+1 {{data member 'i' is not permitted within an interface type}}
  27   int i;
  28   // expected-error@+1 {{static member function 'fn1' is not permitted within an interface type}}
  29   static int fn1();
  30 private:   // expected-error {{interface types cannot specify 'private' access}}
  31   // expected-error@+1 {{non-public member function 'fn2' is not permitted within an interface type}}
  32   void fn2();
  33 protected: // expected-error {{interface types cannot specify 'protected' access}}
  34   // expected-error@+1 {{non-public member function 'fn3' is not permitted within an interface type}}
  35   void fn3();
  36 public:
  37   void fn4();
  38 };
  39
  40 // expected-error@+1 {{'final' keyword not permitted with interface types}}
  41 __interface I3 final {
  42 };
  43
  44 __interface I4 : I1, I2 {
  45   void fn1() const override;
  46   // expected-error@+1 {{'final' keyword not permitted with interface types}}
  47   void fn2() final;
  48 };
  49
  50 // expected-error@+1 {{interface type cannot inherit from non-public interface 'I1'}}
  51 __interface I5 : private I1 {
  52 };
  53
  54 template <typename X>
  55 __interface I6 : X {
  56 };
  57
  58 struct S { };
  59 class C { };
  60 __interface I { };
  61 union U;
  62
  63 static_assert(!__is_interface_class(S), "oops");
  64 static_assert(!__is_interface_class(C), "oops");
  65 static_assert(!__is_interface_class(I), "oops");
  66 static_assert(!__is_interface_class(U), "oops");
  67
  68 // expected-error@55 {{interface type cannot inherit from struct 'S'}}
  69 // expected-note@+1 {{in instantiation of template class 'I6<S>' requested here}}
  70 struct S1 : I6<S> {
  71 };
  72
  73 // expected-error@55 {{interface type cannot inherit from class 'C'}}
  74 // expected-note@+1 {{in instantiation of template class 'I6<C>' requested here}}
  75 class C1 : I6<C> {
  76 };
  77
  78 class C2 : I6<I> {
  79 };
  80
  81
  82 // MSVC makes a special case in that an interface is allowed to have a data
  83 // member if it is a property.
  84 __interface HasProp {
  85   __declspec(property(get = Get, put = Put)) int data;
  86   int Get(void);
  87   void Put(int);
  88 };
  89
  90 struct __declspec(uuid("00000000-0000-0000-C000-000000000046"))
  91     IUnknown {
  92   void foo();
  93   __declspec(property(get = Get, put = Put), deprecated) int data;
  94   int Get(void);
  95   void Put(int);
  96 };
  97
  98 struct IFaceStruct : IUnknown {
  99   __declspec(property(get = Get2, put = Put2), deprecated) int data2;
 100   int Get2(void);
 101   void Put2(int);
 102 };
 103
 104 __interface IFaceInheritsStruct : IFaceStruct {};
 105 static_assert(!__is_interface_class(HasProp), "oops");
 106 static_assert(!__is_interface_class(IUnknown), "oops");
 107 static_assert(!__is_interface_class(IFaceStruct), "oops");
 108 static_assert(!__is_interface_class(IFaceInheritsStruct), "oops");
 109
 110 template<typename>
 111 class TemplateContext {
 112   class Base;
 113   // Should not crash on an incomplete-type and dependent base specifier.
 114   __interface Foo : Base {};
 115 };