126 lines · c
1/* RUN: %clang_cc1 %s -std=c89 -pedantic -fsyntax-only -verify -Wimplicit-function-declaration -Wno-strict-prototypes2 */3void test1(void) {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 21long long test2; /* expected-warning {{extension}} */22 23 24void test3(int i) {25 int A[i]; /* expected-warning {{variable length array}} */26}27 28int test4 = 0LL; /* expected-warning {{long long}} */29 30/* PR1999 */31void test5(register);32 33/* PR2041 */34int *restrict;35int *__restrict; /* expected-error {{expected identifier}} */36 37 38/* Implicit int, always ok */39test6(void) { return 0; }40 41/* PR2012 */42test7;43 44void test8(int, x);45 46typedef int sometype;47int a(sometype, y) {return 0;} /* expected-warning {{omitting the parameter name in a function definition is a C23 extension}}*/48 49void bar (void *);50void f11 (z) /* expected-error {{may not have 'void' type}} */51void z;52{ bar (&z); }53 54typedef void T;55void foo(T); /* typedef for void is allowed */56 57void foo(void) {}58 59/* PR2759 */60void test10 (int x[*]); /* expected-warning {{variable length arrays are a C99 feature}} */61void test11 (int x[static 4]); /* expected-warning {{static array size is a C99 feature}} */62 63void test12 (int x[const 4]) { /* expected-warning {{qualifier in array size is a C99 feature}} */64 int Y[x[1]]; /* expected-warning {{variable length arrays are a C99 feature}} */65}66 67/* PR4074 */68struct test13 {69 int X[23];70} test13a();71 72void test13b() {73 int a = test13a().X[1]; /* expected-warning {{ISO C90 does not allow subscripting non-lvalue array}} */74 int b = 1[test13a().X]; /* expected-warning {{ISO C90 does not allow subscripting non-lvalue array}} */75}76 77/* Make sure we allow *test14 as a "function designator" */78int test14(void) { return (&*test14)(); }79 80int test15[5] = { [2] = 1 }; /* expected-warning {{designated initializers are a C99 feature}} */81 82extern int printf(__const char *__restrict __format, ...);83 84/* Warn, but don't suggest typo correction. */85void test16(void) {86 printg("Hello, world!\n"); /* expected-warning {{implicit declaration of function 'printg'}} */87}88 89struct x { int x,y[]; }; /* expected-warning {{flexible array members are a C99 feature}} */90 91/* Duplicated type-qualifiers aren't allowed by C90 */92const const int c_i; /* expected-warning {{duplicate 'const' declaration specifier}} */93typedef volatile int vol_int;94volatile vol_int volvol_i; /* expected-warning {{duplicate 'volatile' declaration specifier}} */95typedef volatile vol_int volvol_int; /* expected-warning {{duplicate 'volatile' declaration specifier}} */96const int * const c;97 98typedef const int CI;99 100const CI mine1[5][5]; /* expected-warning {{duplicate 'const' declaration specifier}} */101 102typedef CI array_of_CI[5];103const array_of_CI mine2; /* expected-warning {{duplicate 'const' declaration specifier}} */104 105typedef CI *array_of_pointer_to_CI[5];106const array_of_pointer_to_CI mine3;107 108void main(void) {} /* expected-error {{'main' must return 'int'}} */109 110const int main(void) {} /* expected-error {{'main' must return 'int'}} */111 112long long ll1 = /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */113 -42LL; /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */114unsigned long long ull1 = /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */115 42ULL; /* expected-warning {{'long long' is an extension when C99 mode is not enabled}} */116 117struct Test17 { int a; };118struct Test17 test17_aux(void);119 120void test17(int v, int w) {121 int a[2] = { v, w }; /* expected-warning {{initializer for aggregate is not a compile-time constant}} */122 struct Test17 t0 = { v }; /* expected-warning {{initializer for aggregate is not a compile-time constant}} */123 struct Test17 t1 = test17_aux(); /* this is allowed */124}125 126