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 // <exception> 11 12 // class nested_exception; 13 14 // template<class T> void throw_with_nested [[noreturn]] (T&& t); 15 16 #include <exception> 17 #include <cstdlib> 18 #include <cassert> 19 20 class A 21 { 22 int data_; 23 public: 24 explicit A(int data) : data_(data) {} 25 26 friend bool operator==(const A& x, const A& y) {return x.data_ == y.data_;} 27 }; 28 29 class B 30 : public std::nested_exception 31 { 32 int data_; 33 public: 34 explicit B(int data) : data_(data) {} 35 36 friend bool operator==(const B& x, const B& y) {return x.data_ == y.data_;} 37 }; 38 39 int main() 40 { 41 { 42 try 43 { 44 A a(3); 45 std::throw_with_nested(a); 46 assert(false); 47 } 48 catch (const A& a) 49 { 50 assert(a == A(3)); 51 } 52 } 53 { 54 try 55 { 56 A a(4); 57 std::throw_with_nested(a); 58 assert(false); 59 } 60 catch (const std::nested_exception& e) 61 { 62 assert(e.nested_ptr() == nullptr); 63 } 64 } 65 { 66 try 67 { 68 B b(5); 69 std::throw_with_nested(b); 70 assert(false); 71 } 72 catch (const B& b) 73 { 74 assert(b == B(5)); 75 } 76 } 77 { 78 try 79 { 80 B b(6); 81 std::throw_with_nested(b); 82 assert(false); 83 } 84 catch (const std::nested_exception& e) 85 { 86 assert(e.nested_ptr() == nullptr); 87 const B& b = dynamic_cast<const B&>(e); 88 assert(b == B(6)); 89 } 90 } 91 { 92 try 93 { 94 int i = 7; 95 std::throw_with_nested(i); 96 assert(false); 97 } 98 catch (int i) 99 { 100 assert(i == 7); 101 } 102 } 103 } 104
