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/* Test diagnostics for array references.  */

/* Origin: Joseph Myers <joseph@codesourcery.com> */

/* { dg-do compile } */

/* { dg-options "-std=gnu89" } */

struct s { char c[1]; };

struct s f (void);

_Bool b;

char c;

enum e { E } e;

extern int a[];

int *p;

void *pv;

void (*fp)(void);

struct si *sip;

void

g (void)

{

  a[b];

  a[c];

  a[e];

  p[b];

  p[c];

  p[e];

  b[a];

  c[a];

  e[a];

  b[p];

  c[p];

  e[p];

  /* These two should be treated the same.  In particular, a "neither

     array nor pointer" bogus warning used to be given for the

     second.  */

  f().c[0];

  0[f().c];

  /* Various invalid cases.  */

  c[c]; /* { dg-error "subscripted value is neither array nor pointer nor vector" } */

  p[1.0]; /* { dg-error "array subscript is not an integer" } */

  1.0[a]; /* { dg-error "array subscript is not an integer" } */

  fp[0]; /* { dg-error "subscripted value is pointer to function" } */

  0[fp]; /* { dg-error "subscripted value is pointer to function" } */

  pv[0]; /* { dg-warning "dereferencing 'void \\*' pointer" } */

  0[pv]; /* { dg-warning "dereferencing 'void \\*' pointer" } */

  sip[0]; /* { dg-error "invalid use of undefined type 'struct si'" } */

  /* { dg-error "dereferencing pointer to incomplete type" "incomplete" { target *-*-* } 45 } */

  0[sip]; /* { dg-error "invalid use of undefined type 'struct si'" } */

  /* { dg-error "dereferencing pointer to incomplete type" "incomplete" { target *-*-* } 47 } */

}