1 //===----------------------------------------------------------------------===// 2 // 3 // The LLVM Compiler Infrastructure 4 // 5 // This file is dual licensed under the MIT and the University of Illinois Open 6 // Source Licenses. See LICENSE.TXT for details. 7 // 8 //===----------------------------------------------------------------------===// 9 10 // UNSUPPORTED: libcpp-no-exceptions 11 // <list> 12 13 // void push_back(const value_type& x); 14 15 #include <list> 16 #include <cassert> 17 18 // Flag that makes the copy constructor for CMyClass throw an exception 19 static bool gCopyConstructorShouldThow = false; 20 21 22 class CMyClass { 23 public: CMyClass(); 24 public: CMyClass(const CMyClass& iOther); 25 public: ~CMyClass(); 26 27 private: int fMagicValue; 28 29 private: static int kStartedConstructionMagicValue; 30 private: static int kFinishedConstructionMagicValue; 31 }; 32 33 // Value for fMagicValue when the constructor has started running, but not yet finished 34 int CMyClass::kStartedConstructionMagicValue = 0; 35 // Value for fMagicValue when the constructor has finished running 36 int CMyClass::kFinishedConstructionMagicValue = 12345; 37 38 CMyClass::CMyClass() : 39 fMagicValue(kStartedConstructionMagicValue) 40 { 41 // Signal that the constructor has finished running 42 fMagicValue = kFinishedConstructionMagicValue; 43 } 44 45 CMyClass::CMyClass(const CMyClass& /*iOther*/) : 46 fMagicValue(kStartedConstructionMagicValue) 47 { 48 // If requested, throw an exception _before_ setting fMagicValue to kFinishedConstructionMagicValue 49 if (gCopyConstructorShouldThow) { 50 throw std::exception(); 51 } 52 // Signal that the constructor has finished running 53 fMagicValue = kFinishedConstructionMagicValue; 54 } 55 56 CMyClass::~CMyClass() { 57 // Only instances for which the constructor has finished running should be destructed 58 assert(fMagicValue == kFinishedConstructionMagicValue); 59 } 60 61 int main() 62 { 63 CMyClass instance; 64 std::list<CMyClass> vec; 65 66 vec.push_back(instance); 67 68 gCopyConstructorShouldThow = true; 69 try { 70 vec.push_back(instance); 71 } 72 catch (...) { 73 } 74 } 75
