100 lines
6.1 KiB
C++
100 lines
6.1 KiB
C++
// RUN: %clang_cc1 -std=c++11 -fsyntax-only -Wno-nullability-declspec %s -verify -Wnullable-to-nonnull-conversion
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#if __has_feature(nullability)
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#else
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# error nullability feature should be defined
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#endif
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typedef decltype(nullptr) nullptr_t;
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class X {
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};
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// Nullability applies to all pointer types.
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typedef int (X::* _Nonnull member_function_type_1)(int);
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typedef int X::* _Nonnull member_data_type_1;
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typedef nullptr_t _Nonnull nonnull_nullptr_t; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'nullptr_t'}}
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// Nullability can move into member pointers (this is suppressing a warning).
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typedef _Nonnull int (X::* member_function_type_2)(int);
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typedef int (X::* _Nonnull member_function_type_3)(int);
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typedef _Nonnull int X::* member_data_type_2;
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// Adding non-null via a template.
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template<typename T>
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struct AddNonNull {
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typedef _Nonnull T type; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'int'}}
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// expected-error@-1{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'nullptr_t'}}
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};
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typedef AddNonNull<int *>::type nonnull_int_ptr_1;
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typedef AddNonNull<int * _Nullable>::type nonnull_int_ptr_2; // FIXME: check that it was overridden
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typedef AddNonNull<nullptr_t>::type nonnull_int_ptr_3; // expected-note{{in instantiation of template class}}
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typedef AddNonNull<int>::type nonnull_non_pointer_1; // expected-note{{in instantiation of template class 'AddNonNull<int>' requested here}}
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// Non-null checking within a template.
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template<typename T>
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struct AddNonNull2 {
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typedef _Nonnull AddNonNull<T> invalid1; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'AddNonNull<T>'}}
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typedef _Nonnull AddNonNull2 invalid2; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'AddNonNull2<T>'}}
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typedef _Nonnull AddNonNull2<T> invalid3; // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'AddNonNull2<T>'}}
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typedef _Nonnull typename AddNonNull<T>::type okay1;
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// Don't move past a dependent type even if we know that nullability
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// cannot apply to that specific dependent type.
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typedef _Nonnull AddNonNull<T> (*invalid4); // expected-error{{nullability specifier '_Nonnull' cannot be applied to non-pointer type 'AddNonNull<T>'}}
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};
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// Check passing null to a _Nonnull argument.
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void (*accepts_nonnull_1)(_Nonnull int *ptr);
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void (*& accepts_nonnull_2)(_Nonnull int *ptr) = accepts_nonnull_1;
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void (X::* accepts_nonnull_3)(_Nonnull int *ptr);
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void accepts_nonnull_4(_Nonnull int *ptr);
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void (&accepts_nonnull_5)(_Nonnull int *ptr) = accepts_nonnull_4;
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void test_accepts_nonnull_null_pointer_literal(X *x) {
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accepts_nonnull_1(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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accepts_nonnull_2(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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(x->*accepts_nonnull_3)(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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accepts_nonnull_4(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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accepts_nonnull_5(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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}
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template<void FP(_Nonnull int*)>
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void test_accepts_nonnull_null_pointer_literal_template() {
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FP(0); // expected-warning{{null passed to a callee that requires a non-null argument}}
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}
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template void test_accepts_nonnull_null_pointer_literal_template<&accepts_nonnull_4>(); // expected-note{{instantiation of function template specialization}}
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void TakeNonnull(void *_Nonnull);
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// Check different forms of assignment to a nonull type from a nullable one.
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void AssignAndInitNonNull() {
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void *_Nullable nullable;
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void *_Nonnull p(nullable); // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p2{nullable}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p3 = {nullable}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p4 = nullable; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull nonnull;
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nonnull = nullable; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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nonnull = {nullable}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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TakeNonnull(nullable); //expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull}}
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TakeNonnull(nonnull); // OK
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}
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void *_Nullable ReturnNullable();
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void AssignAndInitNonNullFromFn() {
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void *_Nonnull p(ReturnNullable()); // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p2{ReturnNullable()}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p3 = {ReturnNullable()}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull p4 = ReturnNullable(); // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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void *_Nonnull nonnull;
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nonnull = ReturnNullable(); // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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nonnull = {ReturnNullable()}; // expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull'}}
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TakeNonnull(ReturnNullable()); //expected-warning{{implicit conversion from nullable pointer 'void * _Nullable' to non-nullable pointer type 'void * _Nonnull}}
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}
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