gcc/testsuite/c-c++-common/attr-nonstring-1.c

   1 /* Test to exercise attribute "nonstring" syntax.
   2    { dg-do compile }
   3    { dg-options "-Wattributes" }  */
   4
   5 #define ATTR(list) __attribute__ (list)
   6 #define NONSTR     ATTR ((nonstring))
   7
   8 /* Verify it's accepted on char arrays.  */
   9 extern NONSTR char nsx_1[];
  10 extern char NONSTR nsx_2[];
  11 extern char nsx_3[] NONSTR;
  12
  13 extern NONSTR char ns1[1];
  14 extern char NONSTR ns3[3];
  15 extern char ns5[5] NONSTR;
  16
  17 /* Verify it's accepted on char pointers.  */
  18 extern NONSTR char* pns_1;
  19 extern char NONSTR* pns_2;
  20 extern char* NONSTR pns_3;
  21
  22 struct S
  23 {
  24 /* Verify it's accepted on char member pointers.  */
  25   NONSTR char* mpns_1;
  26   char NONSTR* mpns_2;
  27   char* NONSTR mpns_3;
  28
  29 /* Verify it's accepted on char member arrays.  */
  30   NONSTR char mns1[1];
  31   char NONSTR mns3[3];
  32   char mns5[5] NONSTR;
  33
  34 /* Verify it's accepted on char flexible array members.  */
  35   char mnsx[] NONSTR;
  36 };
  37
  38 /* Verify it's rejected on non-array and non-pointer objects.  */
  39 extern NONSTR char c1;         /* { dg-warning ".nonstring. attribute ignored on objects of type .char." } */
  40
  41 extern NONSTR int i1;         /* { dg-warning ".nonstring. attribute ignored on objects of type .int." } */
  42
  43 extern NONSTR int ia1[];      /* { dg-warning ".nonstring. attribute ignored on objects of type .int *\\\[\\\]." } */
  44
  45 extern NONSTR int* pi1;       /* { dg-warning ".nonstring. attribute ignored on objects of type .int *\\*." } */
  46
  47 extern NONSTR
  48 void f (void);                /* { dg-warning ".nonstring. attribute does not apply to functions" } */
  49
  50 struct NONSTR
  51 NonStrType { int i; };        /* { dg-warning ".nonstring. attribute does not apply to types" } */
  52
  53 typedef char NONSTR nschar_t; /* { dg-warning ".nonstring. attribute does not apply to types" } */
  54
  55 void func (NONSTR char *pns1, char NONSTR *pns2, char* NONSTR pns3)
  56 {
  57   (void)pns1;
  58   (void)pns2;
  59   (void)pns3;
  60 }