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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;

}