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/* Check if the @defs() construct preserves the correct
   layout of bitfields.  */
/* Contributed by Ziemowit Laski <zlaski@apple.com>.  */
/* { dg-options "-lobjc -Wpadded" } */
/* { dg-do run } */
 
#include <objc/objc.h>
#include <objc/Object.h>
 
extern void abort(void);
extern int strcmp(const char *str1, const char *str2);
#define CHECK_IF(expr) if(!(expr)) abort()
 
enum Enum { one, two, three, four };
 
@interface Base: Object {
  unsigned a: 2;
  int b: 3;
  enum Enum c: 4;
  unsigned d: 5;
} /* { dg-warning "padding struct size to alignment boundary" } */
@end
 
@interface Derived: Base {
  signed e: 5;
  int f: 4;
  enum Enum g: 3;
} /* { dg-warning "padding struct size to alignment boundary" } */
@end
 
/* Note that the semicolon after @defs(...) is optional.  */
 
typedef struct { @defs(Base) } Base_t;  /* { dg-warning "padding struct size to alignment boundary" } */
typedef struct { @defs(Derived); } Derived_t;  /* { dg-warning "padding struct size to alignment boundary" } */
 
int main(void)
{
  CHECK_IF(sizeof(Base_t) == sizeof(Base));
  CHECK_IF(sizeof(Derived_t) == sizeof(Derived));
 
#ifdef __NEXT_RUNTIME__
  CHECK_IF(!strcmp(@encode(Base), "{Base=#b2b3b4b5}"));
  CHECK_IF(!strcmp(@encode(Derived), "{Derived=#b2b3b4b5b5b4b3}"));
 
  CHECK_IF(!strcmp(@encode(Base_t), "{?=#b2b3b4b5}"));
  CHECK_IF(!strcmp(@encode(Derived_t), "{?=#b2b3b4b5b5b4b3}"));
#endif /* __NEXT_RUNTIME__ */
 
  return 0;
}