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      1 /* RUN: %clang_cc1 %s -std=c89 -pedantic -fsyntax-only -verify -Wimplicit-function-declaration
      2  */
      3 void test1() {
      4   {
      5     int i;
      6     i = i + 1;
      7     int j;          /* expected-warning {{mixing declarations and code}} */
      8   }
      9   {
     10     __extension__ int i;
     11     i = i + 1;
     12     int j;          /* expected-warning {{mixing declarations and code}} */
     13   }
     14   {
     15     int i;
     16     i = i + 1;
     17     __extension__ int j; /* expected-warning {{mixing declarations and code}} */
     18   }
     19 }
     20 
     21 long long test2;   /* expected-warning {{extension}} */
     22 
     23 
     24 void test3(int i) {
     25   int A[i];        /* expected-warning {{variable length array}} */
     26 }
     27 
     28 int test4 = 0LL;   /* expected-warning {{long long}} */
     29 
     30 /* PR1999 */
     31 void test5(register);
     32 
     33 /* PR2041 */
     34 int *restrict;
     35 int *__restrict;  /* expected-error {{expected identifier}} */
     36 
     37 
     38 /* Implicit int, always ok */
     39 test6() { return 0; }
     40 
     41 /* PR2012 */
     42 test7;  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} */
     43 
     44 void test8(int, x);  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} */
     45 
     46 typedef int sometype;
     47 int a(sometype, y) {return 0;}  /* expected-warning {{declaration specifier missing, defaulting to 'int'}} \
     48                                    expected-error {{parameter name omitted}}*/
     49 
     50 
     51 
     52 
     53 void bar (void *);
     54 void f11 (z)       /* expected-error {{may not have 'void' type}} */
     55 void z;
     56 { bar (&z); }
     57 
     58 typedef void T;
     59 void foo(T); /* typedef for void is allowed */
     60 
     61 void foo(void) {}
     62 
     63 /* PR2759 */
     64 void test10 (int x[*]); /* expected-warning {{variable length arrays are a C99 feature}} */
     65 void test11 (int x[static 4]); /* expected-warning {{static array size is a C99 feature}} */
     66 
     67 void test12 (int x[const 4]) { /* expected-warning {{qualifier in array size is a C99 feature}} */
     68   int Y[x[1]]; /* expected-warning {{variable length arrays are a C99 feature}} */
     69 }
     70 
     71 /* PR4074 */
     72 struct test13 {
     73   int X[23];
     74 } test13a();
     75 
     76 void test13b() {
     77   int a = test13a().X[1]; /* expected-warning {{ISO C90 does not allow subscripting non-lvalue array}} */
     78   int b = 1[test13a().X]; /* expected-warning {{ISO C90 does not allow subscripting non-lvalue array}} */
     79 }
     80 
     81 /* Make sure we allow *test14 as a "function designator" */
     82 int test14() { return (&*test14)(); }
     83 
     84 int test15[5] = { [2] = 1 }; /* expected-warning {{designated initializers are a C99 feature}} */
     85 
     86 extern int printf(__const char *__restrict __format, ...);
     87 
     88 /* Warn, but don't suggest typo correction. */
     89 void test16() {
     90   printg("Hello, world!\n"); /* expected-warning {{implicit declaration of function 'printg'}} */
     91 }
     92 
     93 struct x { int x,y[]; }; /* expected-warning {{flexible array members are a C99 feature}} */
     94 
     95 /* Duplicated type-qualifiers aren't allowed by C90 */
     96 const const int c_i; /* expected-warning {{duplicate 'const' declaration specifier}} */
     97 typedef volatile int vol_int;
     98 volatile vol_int volvol_i; /* expected-warning {{duplicate 'volatile' declaration specifier}} */
     99 typedef volatile vol_int volvol_int; /* expected-warning {{duplicate 'volatile' declaration specifier}} */
    100 const int * const c;
    101 
    102 typedef const int CI;
    103 
    104 const CI mine1[5][5]; /* expected-warning {{duplicate 'const' declaration specifier}} */
    105 
    106 typedef CI array_of_CI[5];
    107 const array_of_CI mine2; /* expected-warning {{duplicate 'const' declaration specifier}} */
    108 
    109 typedef CI *array_of_pointer_to_CI[5];
    110 const array_of_pointer_to_CI mine3;
    111 
    112 void main() {} /* expected-error {{'main' must return 'int'}} */
    113 
    114 const int main() {} /* expected-error {{'main' must return 'int'}} */
    115 
    116 long long ll1 = /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */
    117          -42LL; /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */
    118 unsigned long long ull1 = /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */
    119                    42ULL; /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */
    120 
    121 struct Test17 { int a; };
    122 struct Test17 test17_aux(void);
    123 
    124 void test17(int v, int w) {
    125   int a[2] = { v, w }; /* expected-warning {{initializer for aggregate is not a compile-time constant}} */
    126   struct Test17 t0 = { v }; /* expected-warning {{initializer for aggregate is not a compile-time constant}} */
    127   struct Test17 t1 = test17_aux(); /* this is allowed */
    128 }
    129 
    130