cppinsights/tests/EduCfrontVtable4Test.expect at c53f8b3f0db00e0fcc8a4d85b8b5c86d54affa39 · andreasfertig/cppinsights · GitHub

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/*************************************************************************************
 * NOTE: This an educational hand-rolled transformation. Things can be incorrect or  *
 * buggy.                                                                            *
 *************************************************************************************/
void __cxa_start(void);
void __cxa_atexit(void);
typedef int (*__vptp)();

struct __mptr
{
    short  d;
    short  i;
    __vptp f;
};

extern struct __mptr* __vtbl_array[];


#include <cstdio>

typedef struct A
{
  __mptr * __vptrA;
  double md;
} A;

inline void Destructor_A(A * __this)
{
  __this->__vptrA = __vtbl_array[0];
  puts("dtor");
}

inline void FunA(A * __this)
{
  puts("fun a");
}

inline A * Constructor_A(A * __this)
{
  __this->__vptrA = __vtbl_array[0];
  return __this;
}


typedef struct B
{
  __mptr * __vptrA;
  double md;
  int mX;
} B;

inline void FunB(B * __this)
{
  printf("fun b: %d\n", __this->mX);
}

inline void OtherB(B * __this)
{
}

inline void Destructor_B(B * __this)
{
  Destructor_A((A *)__this);
}

inline B * Constructor_B(B * __this)
{
  Constructor_A((A *)__this);
  __this->__vptrA = __vtbl_array[1];
  __this->mX = 5;
  return __this;
}


typedef struct C
{
  __mptr * __vptrA;
  double md;
  int mX;
  int mB;
} C;

inline void FunC(C * __this)
{
  printf("fun c: %d\n", __this->mB);
}

inline void OtherC(C * __this)
{
}

inline void Destructor_C(C * __this)
{
  Destructor_B((B *)__this);
}

inline C * Constructor_C(C * __this)
{
  Constructor_B((B *)__this);
  __this->__vptrA = __vtbl_array[2];
  __this->mB = 8;
  return __this;
}


int __main(void)
{
  C b;
  Constructor_C((C *)&b);
  (*((void (*)(C *))((&b)->__vptrA[1]).f))((((C *)(char *)(&b)) + ((&b)->__vptrA[1]).d));
  A * a = (A *)&b;
  (*((void (*)(A *))((a)->__vptrA[1]).f))((((A *)(char *)(a)) + ((a)->__vptrA[1]).d));
  return 0;
  (*((void (*)(C *))((&b)->__vptrA[0]).f))((((C *)(char *)(&b)) + ((&b)->__vptrA[0]).d));
}

int main(void)
{
  __cxa_start();
  int ret = __main();
  __cxa_atexit();
  return ret;
  /* ret // lifetime ends here */
}

__mptr __vtbl_A[2] = {{0, 0, (__vptp)Destructor_A}, {0, 0, (__vptp)FunA}};
__mptr __vtbl_B[3] = {{0, 0, (__vptp)Destructor_B}, {0, 0, (__vptp)FunB}, {0, 0, (__vptp)OtherB}};
__mptr __vtbl_C[3] = {{0, 0, (__vptp)Destructor_C}, {0, 0, (__vptp)FunC}, {0, 0, (__vptp)OtherC}};

__mptr * __vtbl_array[3] = {__vtbl_A, __vtbl_B, __vtbl_C};

void __cxa_start(void)
{
}

void __cxa_atexit(void)
{
}