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// RUN: %check_clang_tidy %s readability-uniqueptr-delete-release %t -check-suffix=NULLPTR
// RUN: %check_clang_tidy %s readability-uniqueptr-delete-release %t -check-suffix=RESET -config='{ \
// RUN: CheckOptions: {readability-uniqueptr-delete-release.PreferResetCall: true}}'
namespace std {
template <typename T>
struct default_delete {};
template <typename T, typename D = default_delete<T>>
class unique_ptr {
public:
unique_ptr();
~unique_ptr();
explicit unique_ptr(T*);
template <typename U, typename E>
unique_ptr(unique_ptr<U, E>&&);
T* release();
void reset(T *P = nullptr);
T &operator*() const;
T *operator->() const;
};
} // namespace std
std::unique_ptr<int>& ReturnsAUnique();
void Positives() {
std::unique_ptr<int> P;
delete P.release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr' to reset 'unique_ptr<>' objects
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()' to reset 'unique_ptr<>' objects
// CHECK-FIXES-NULLPTR: P = nullptr;
// CHECK-FIXES-RESET: P.reset();
auto P2 = P;
delete P2.release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr' to reset 'unique_ptr<>' objects
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()' to reset 'unique_ptr<>' objects
// CHECK-FIXES-NULLPTR: P2 = nullptr;
// CHECK-FIXES-RESET: P2.reset();
delete (P2.release());
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: (P2 = nullptr);
// CHECK-FIXES-RESET: (P2.reset());
std::unique_ptr<int> Array[20];
delete Array[4].release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: Array[4] = nullptr;
// CHECK-FIXES-RESET: Array[4].reset();
delete ReturnsAUnique().release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: ReturnsAUnique() = nullptr;
// CHECK-FIXES-RESET: ReturnsAUnique().reset();
std::unique_ptr<int> *P3(&P);
delete P3->release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: *P3 = nullptr;
// CHECK-FIXES-RESET: P3->reset();
std::unique_ptr<std::unique_ptr<int>> P4;
delete (*P4).release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: (*P4) = nullptr;
// CHECK-FIXES-RESET: (*P4).reset();
delete P4->release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: *P4 = nullptr;
// CHECK-FIXES-RESET: P4->reset();
delete (P4)->release();
// CHECK-MESSAGES-NULLPTR: :[[@LINE-1]]:3: warning: prefer '= nullptr'
// CHECK-MESSAGES-RESET: :[[@LINE-2]]:3: warning: prefer 'reset()'
// CHECK-FIXES-NULLPTR: *(P4) = nullptr;
// CHECK-FIXES-RESET: (P4)->reset();
}
struct NotDefaultDeleter {};
struct NotUniquePtr {
int* release();
};
void Negatives() {
std::unique_ptr<int, NotDefaultDeleter> P;
delete P.release();
NotUniquePtr P2;
delete P2.release();
// We don't trigger on bound member function calls.
delete (P2.release)();
}
template <typename T, typename D>
void NegativeDeleterT() {
// Ideally this would trigger a warning, but we have all dependent types
// disabled for now.
std::unique_ptr<T> P;
delete P.release();
// We ignore this one because the deleter is a template argument.
// Not all instantiations will use the default deleter.
std::unique_ptr<int, D> P2;
delete P2.release();
}
template void NegativeDeleterT<int, std::default_delete<int>>();
// Test some macros
#define DELETE_RELEASE(x) delete (x).release()
void NegativesWithTemplate() {
std::unique_ptr<int> P;
DELETE_RELEASE(P);
}
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