llvm-project/clang/test/Sema/c89.c

/* RUN: clang %s -std=c89 -pedantic -fsyntax-only -verify
 */
void test1() {
  {
    int i;
    i = i + 1;
    int j;          /* expected-warning {{mixing declarations and code}} */
  }
  {
    __extension__ int i;
    i = i + 1;
    int j;          /* expected-warning {{mixing declarations and code}} */
  }
  {
    int i;
    i = i + 1;
    __extension__ int j; /* expected-warning {{mixing declarations and code}} */
  }
}

long long test2;   /* expected-warning {{extension}} */


void test3(int i) {
  int A[i];        /* expected-warning {{variable length array}} */
}

int test4 = 0LL;		/* expected-warning {{long long}} */

/* PR1999 */
void test5(register);

/* PR2041 */
int *restrict;
int *__restrict;  /* expected-error {{expected identifier}} */


/* Implicit int, always ok */
test6() {}

/* PR2012 */
test7;  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} */

void test8(int, x);  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} */

typedef int sometype;
int a(sometype, y) {return 0;}  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} \
                                   expected-error {{parameter name omitted}}*/




void bar (void *); 
void f11 (z)       /* expected-error {{may not have 'void' type}} */
void z; 
{ bar (&z); }

typedef void T;
void foo(T); /* typedef for void is allowed */

void foo(void) {}

/* PR2759 */
void test10 (int x[*]); /* expected-warning {{use of C99-specific array features}} */
void test11 (int x[static 4]); /* expected-warning {{use of C99-specific array features}} */

void test12 (int x[const 4]) { /* expected-warning {{use of C99-specific array features}} */
  int Y[x[1]]; /* expected-warning {{variable length arrays are a C99 feature, accepted as an extension}} */
}