clang/test/CodeGenCXX/microsoft-abi-vtables-ambiguous.cpp

   1 // RUN: %clang_cc1 %s -emit-llvm-only -triple=i386-pc-win32 -verify -DTEST1
   2 // RUN: %clang_cc1 %s -emit-llvm-only -triple=i386-pc-win32 -verify -DTEST2
   3
   4 #ifdef TEST1
   5 struct A {
   6   virtual A *foo();  // in vftable slot #0.
   7   virtual A *bar();  // in vftable slot #1.
   8 };
   9
  10 struct B : virtual A {
  11   // appended to the A subobject's vftable in slot #2.
  12   virtual B *foo(); // expected-note{{covariant thunk required by 'foo'}}
  13 };
  14
  15 struct C : virtual A {
  16   // appended to the A subobject's vftable in slot #2.
  17   virtual C *bar(); // expected-note{{covariant thunk required by 'bar'}}
  18 };
  19
  20 struct D : B, C { D(); }; // expected-error{{ambiguous vftable component}}
  21 D::D() {}
  22 #endif
  23
  24 #ifdef TEST2
  25 struct A {
  26   virtual A *foo(); // in vftable slot #0
  27 };
  28
  29 struct B : virtual A {
  30   // appended to the A subobject's vftable in slot #1.
  31   virtual B *foo(); // expected-note{{covariant thunk required by 'foo'}}
  32 };
  33
  34 struct C : virtual A {
  35   // appended to the A subobject's vftable in slot #1.
  36   virtual C *foo(); // expected-note{{covariant thunk required by 'foo'}}
  37 };
  38
  39 struct D : B, C { // expected-error{{ambiguous vftable component}}
  40   virtual D *foo();
  41   D();
  42 };
  43 D::D() {}
  44 #endif