1 // RUN: %check_clang_tidy %s bugprone-unhandled-self-assignment %t -- \ 2 // RUN: -config="{CheckOptions: \ 3 // RUN: [{key: bugprone-unhandled-self-assignment.WarnOnlyIfThisHasSuspiciousField, \ 4 // RUN: value: 0}]}" 5 6 // Classes with pointer field are still caught. 7 class PtrField { 8 public: operator =(const PtrField & object)9 PtrField &operator=(const PtrField &object) { 10 // CHECK-MESSAGES: [[@LINE-1]]:13: warning: operator=() does not handle self-assignment properly [bugprone-unhandled-self-assignment] 11 return *this; 12 } 13 14 private: 15 int *p; 16 }; 17 18 // With the option, check catches classes with trivial fields. 19 class TrivialFields { 20 public: operator =(const TrivialFields & object)21 TrivialFields &operator=(const TrivialFields &object) { 22 // CHECK-MESSAGES: [[@LINE-1]]:18: warning: operator=() does not handle self-assignment properly [bugprone-unhandled-self-assignment] 23 return *this; 24 } 25 26 private: 27 int m; 28 float f; 29 double d; 30 bool b; 31 }; 32 33 // The check warns also when there is no field at all. 34 // In this case, user-defined copy assignment operator is useless anyway. 35 class ClassWithoutFields { 36 public: operator =(const ClassWithoutFields & object)37 ClassWithoutFields &operator=(const ClassWithoutFields &object) { 38 // CHECK-MESSAGES: [[@LINE-1]]:23: warning: operator=() does not handle self-assignment properly [bugprone-unhandled-self-assignment] 39 return *this; 40 } 41 }; 42