89 lines
2.8 KiB
C
89 lines
2.8 KiB
C
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// RUN: %clang_cc1 -fsyntax-only -verify %s
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// rdar: // 8125274
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static int a16[]; // expected-warning {{tentative array definition assumed to have one element}}
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void f16(void) {
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extern int a16[];
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}
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// PR10013: Scope of extern declarations extend past enclosing block
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extern int PR10013_x;
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int PR10013(void) {
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int *PR10013_x = 0;
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{
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extern int PR10013_x;
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extern int PR10013_x;
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}
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return PR10013_x; // expected-warning{{incompatible pointer to integer conversion}}
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}
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static int test1_a[]; // expected-warning {{tentative array definition assumed to have one element}}
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extern int test1_a[];
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// rdar://13535367
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void test2declarer() { extern int test2_array[100]; }
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extern int test2_array[];
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int test2v = sizeof(test2_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}}
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void test3declarer() {
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{ extern int test3_array[100]; }
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extern int test3_array[];
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int x = sizeof(test3_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}}
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}
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void test4() {
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extern int test4_array[];
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{
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extern int test4_array[100];
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int x = sizeof(test4_array); // fine
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}
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int x = sizeof(test4_array); // expected-error {{invalid application of 'sizeof' to an incomplete type 'int []'}}
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}
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// Test that invalid local extern declarations of library
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// builtins behave reasonably.
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extern void abort(void); // expected-note 2 {{previous declaration is here}}
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extern float *calloc(); // expected-warning {{incompatible redeclaration of library function}} expected-note {{is a builtin}} expected-note 2 {{previous declaration is here}}
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void test5a() {
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int abort(); // expected-error {{conflicting types}}
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float *malloc(); // expected-warning {{incompatible redeclaration of library function}} expected-note 2 {{is a builtin}}
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int *calloc(); // expected-error {{conflicting types}}
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}
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void test5b() {
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int abort(); // expected-error {{conflicting types}}
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float *malloc(); // expected-warning {{incompatible redeclaration of library function}}
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int *calloc(); // expected-error {{conflicting types}}
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}
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void test5c() {
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void (*_abort)(void) = &abort;
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void *(*_malloc)() = &malloc;
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float *(*_calloc)() = &calloc;
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}
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void test6() {
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extern int test6_array1[100];
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extern int test6_array2[100];
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void test6_fn1(int*);
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void test6_fn2(int*);
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{
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// Types are only merged from visible declarations.
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char test6_array2;
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char test6_fn2;
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{
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extern int test6_array1[];
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extern int test6_array2[];
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(void)sizeof(test6_array1); // ok
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(void)sizeof(test6_array2); // expected-error {{incomplete type}}
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void test6_fn1();
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void test6_fn2();
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test6_fn1(1.2); // expected-error {{passing 'double' to parameter of incompatible type 'int *'}}
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// FIXME: This is valid, but we should warn on it.
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test6_fn2(1.2);
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}
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}
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}
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