1 //===----------------------------------------------------------------------===//
2 //
3 // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4 // See https://llvm.org/LICENSE.txt for license information.
5 // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6 //
7 //===----------------------------------------------------------------------===//
8
9 // UNSUPPORTED: no-exceptions
10 // <deque>
11
12 // void push_back(const value_type& x);
13
14 #include <deque>
15 #include "test_macros.h"
16 #include "test_allocator.h"
17 #include <cassert>
18
19 // Flag that makes the copy constructor for CMyClass throw an exception
20 static bool gCopyConstructorShouldThrow = false;
21
22 class CMyClass {
23 public: CMyClass(int tag);
24 public: CMyClass(const CMyClass& iOther);
25 public: ~CMyClass();
26
equal(const CMyClass & rhs) const27 bool equal(const CMyClass &rhs) const
28 { return fTag == rhs.fTag && fMagicValue == rhs.fMagicValue; }
29
30 private:
31 int fMagicValue;
32 int fTag;
33
34 private: static int kStartedConstructionMagicValue;
35 private: static int kFinishedConstructionMagicValue;
36 };
37
38 // Value for fMagicValue when the constructor has started running, but not yet finished
39 int CMyClass::kStartedConstructionMagicValue = 0;
40 // Value for fMagicValue when the constructor has finished running
41 int CMyClass::kFinishedConstructionMagicValue = 12345;
42
CMyClass(int tag)43 CMyClass::CMyClass(int tag) :
44 fMagicValue(kStartedConstructionMagicValue), fTag(tag)
45 {
46 // Signal that the constructor has finished running
47 fMagicValue = kFinishedConstructionMagicValue;
48 }
49
CMyClass(const CMyClass & iOther)50 CMyClass::CMyClass(const CMyClass& iOther) :
51 fMagicValue(kStartedConstructionMagicValue), fTag(iOther.fTag)
52 {
53 // If requested, throw an exception _before_ setting fMagicValue to kFinishedConstructionMagicValue
54 if (gCopyConstructorShouldThrow) {
55 throw std::exception();
56 }
57 // Signal that the constructor has finished running
58 fMagicValue = kFinishedConstructionMagicValue;
59 }
60
~CMyClass()61 CMyClass::~CMyClass() {
62 // Only instances for which the constructor has finished running should be destructed
63 assert(fMagicValue == kFinishedConstructionMagicValue);
64 }
65
operator ==(const CMyClass & lhs,const CMyClass & rhs)66 bool operator==(const CMyClass &lhs, const CMyClass &rhs) { return lhs.equal(rhs); }
67
main(int,char **)68 int main(int, char**)
69 {
70 CMyClass instance(42);
71 {
72 std::deque<CMyClass> vec;
73
74 vec.push_back(instance);
75 std::deque<CMyClass> vec2(vec);
76
77 gCopyConstructorShouldThrow = true;
78 try {
79 vec.push_back(instance);
80 assert(false);
81 }
82 catch (...) {
83 gCopyConstructorShouldThrow = false;
84 assert(vec == vec2);
85 }
86 }
87
88 {
89 test_allocator_statistics alloc_stats;
90 typedef std::deque<CMyClass, test_allocator<CMyClass> > C;
91 C vec((test_allocator<CMyClass>(&alloc_stats)));
92 C vec2(vec, test_allocator<CMyClass>(&alloc_stats));
93
94 alloc_stats.throw_after = 1;
95 try {
96 vec.push_back(instance);
97 assert(false);
98 }
99 catch (...) {
100 assert(vec==vec2);
101 }
102 }
103
104 return 0;
105 }
106