gcc/testsuite/g++.old-deja/g++.jason/thunk3.C

   1 // { dg-do run }
   2 // { dg-skip-if "fails with generic thunk support" { rs6000-*-* powerpc-*-eabi v850-*-* sh-*-* sh64-*-* h8*-*-* xtensa*-*-* m32r*-*-* lm32-*-* nios2-*-* } { "*" } { "" } }
   3 // Test that variadic function calls using thunks work right.
   4 // Note that this will break on any target that uses the generic thunk
   5 //  support, because it doesn't support variadic functions.
   6
   7
   8 #include <stdarg.h>
   9
  10 struct A {
  11   void* p;
  12   A (void* q): p (q) { }
  13   A (const A& a): p (a.p) { }
  14 };
  15
  16 class CBase {
  17 public:
  18    virtual void BaseFunc();
  19 };
  20
  21 class MMixin {
  22 public:
  23    virtual A MixinFunc(int arg, ...) = 0;
  24 };
  25
  26 class CExample : public CBase, public MMixin {
  27 public:
  28    A MixinFunc(int arg, ...);
  29 };
  30
  31 void CBase::BaseFunc()
  32 {
  33 }
  34
  35 A CExample::MixinFunc(int arg, ...)
  36 {
  37   va_list ap;
  38   va_start (ap, arg);
  39
  40   if (arg != 1 || va_arg (ap, int) != 2 || va_arg (ap, int) != 3
  41       || va_arg (ap, int) != 4 || va_arg (ap, int) != 5
  42       || va_arg (ap, int) != 6 || va_arg (ap, int) != 7
  43       || va_arg (ap, int) != 8 || va_arg (ap, int) != 9)
  44     return 0;
  45   return this;
  46 }
  47
  48 void* test(MMixin& anExample)
  49 {
  50   return anExample.MixinFunc(1,2,3,4,5,6,7,8,9).p;
  51 }
  52
  53 int main ()
  54 {
  55   CExample c;
  56
  57   if (test(c) != &c)
  58     return 1;
  59 }