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// RUN: %clang_cc1 -fsyntax-only -Wnonnull -Wnullability %s -verify
#if __has_feature(nullability)
#else
# error nullability feature should be defined
#endif
int * _Nullable foo(int * _Nonnull x);
int *_Nonnull ret_nonnull(void);
int *foo(int *x) {
return 0;
}
int * _Nullable foo1(int * _Nonnull x); // expected-note {{previous declaration is here}}
int *foo1(int * _Nullable x) { // expected-warning {{nullability specifier '_Nullable' conflicts with existing specifier '_Nonnull'}}
return 0;
}
int * _Nullable foo2(int * _Nonnull x);
int *foo2(int * _Nonnull x) {
return 0;
}
int * _Nullable foo3(int * _Nullable x); // expected-note {{previous declaration is here}}
int *foo3(int * _Nonnull x) { // expected-warning {{nullability specifier '_Nonnull' conflicts with existing specifier '_Nullable'}}
return 0;
}
int * ret_nonnull(void) {
return 0; // expected-warning {{null returned from function that requires a non-null return value}}
}
int foo4(int * _Nonnull x, int * y) {
return 0;
}
#define SAFE_CALL(X) if (X) foo(X)
int main (void) {
foo(0); // expected-warning {{null passed to a callee that requires a non-null argument}}
(void)sizeof(foo(0)); // expect no diagnostic in unevaluated context.
SAFE_CALL(0); // expect no diagnostic for unreachable code.
foo4(
0, // expected-warning {{null passed to a callee that requires a non-null argument}}
0);
}
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