65 lines · cpp
1// RUN: %check_clang_tidy %s bugprone-misplaced-pointer-arithmetic-in-alloc %t2 3class C {4 int num;5public:6 explicit C(int n) : num(n) {}7};8 9void bad_new(int n, int m) {10 C *p = new C(n) + 10;11 // CHECK-MESSAGES: :[[@LINE-1]]:10: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument12 // CHECK-FIXES: C *p = new C(n + 10);13 14 p = new C(n) - 10;15 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument16 // CHECK-FIXES: p = new C(n - 10);17 18 p = new C(n) + m;19 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument20 // CHECK-FIXES: p = new C(n + m);21 22 p = new C(n) - (m + 10);23 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument24 // CHECK-FIXES: p = new C(n - (m + 10));25 26 p = new C(n) - m + 10;27 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument28 // CHECK-FIXES: p = new C(n - m) + 10;29 // FIXME: Should be p = new C(n - m + 10);30}31 32void bad_new_array(int n, int m) {33 char *p = new char[n] + 10;34 // CHECK-MESSAGES: :[[@LINE-1]]:13: warning: arithmetic operation is applied to the result of operator new[]() instead of its size-like argument35 // CHECK-FIXES: char *p = new char[n + 10];36 37 p = new char[n] - 10;38 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new[]() instead of its size-like argument39 // CHECK-FIXES: p = new char[n - 10];40 41 p = new char[n] + m;42 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new[]() instead of its size-like argument43 // CHECK-FIXES: p = new char[n + m];44 45 p = new char[n] - (m + 10);46 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new[]() instead of its size-like argument47 // CHECK-FIXES: p = new char[n - (m + 10)];48 49 p = new char[n] - m + 10;50 // CHECK-MESSAGES: :[[@LINE-1]]:7: warning: arithmetic operation is applied to the result of operator new[]() instead of its size-like argument51 // CHECK-FIXES: p = new char[n - m] + 10;52 // FIXME: should be p = new char[n - m + 10];53}54 55namespace std {56typedef decltype(sizeof(void*)) size_t;57}58 59void* operator new(std::size_t, void*);60 61void placement_new_ptr(void *buf, C *old) {62 C **p = new (buf) C*(old) + 1;63 // CHECK-MESSAGES-NOT: :[[@LINE-1]]:11: warning: arithmetic operation is applied to the result of operator new() instead of its size-like argument64}65