| 1 | // RUN: %clang_cc1 -fsyntax-only -Wnonnull -Wnullability %s -verify |
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| 2 | // rdar://19160762 |
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| 3 | |
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| 4 | #if __has_feature(nullability) |
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| 5 | #else |
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| 6 | # error nullability feature should be defined |
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| 7 | #endif |
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| 8 | |
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| 9 | |
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| 10 | int * _Nullable foo(int * _Nonnull x); |
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| 11 | |
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| 12 | int *_Nonnull ret_nonnull(); |
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| 13 | |
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| 14 | int *foo(int *x) { |
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| 15 | return 0; |
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| 16 | } |
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| 17 | |
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| 18 | int * _Nullable foo1(int * _Nonnull x); // expected-note {{previous declaration is here}} |
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| 19 | |
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| 20 | int *foo1(int * _Nullable x) { // expected-warning {{nullability specifier '_Nullable' conflicts with existing specifier '_Nonnull'}} |
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| 21 | return 0; |
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| 22 | } |
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| 23 | |
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| 24 | int * _Nullable foo2(int * _Nonnull x); |
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| 25 | |
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| 26 | int *foo2(int * _Nonnull x) { |
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| 27 | return 0; |
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| 28 | } |
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| 29 | |
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| 30 | int * _Nullable foo3(int * _Nullable x); // expected-note {{previous declaration is here}} |
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| 31 | |
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| 32 | int *foo3(int * _Nonnull x) { // expected-warning {{nullability specifier '_Nonnull' conflicts with existing specifier '_Nullable'}} |
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| 33 | return 0; |
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| 34 | } |
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| 35 | |
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| 36 | int * ret_nonnull() { |
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| 37 | return 0; // expected-warning {{null returned from function that requires a non-null return value}} |
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| 38 | } |
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| 39 | |
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| 40 | #define SAFE_CALL(X) if (X) foo(X) |
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| 41 | int main () { |
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| 42 | foo(0); // expected-warning {{null passed to a callee that requires a non-null argument}} |
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| 43 | (void)sizeof(foo(0)); // expect no diagnostic in unevaluated context. |
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| 44 | SAFE_CALL(0); // expect no diagnostic for unreachable code. |
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| 45 | } |
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| 46 | |
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