1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
|
//===----------------------------------------------------------------------===//
//
// The LLVM Compiler Infrastructure
//
// This file is dual licensed under the MIT and the University of Illinois Open
// Source Licenses. See LICENSE.TXT for details.
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: libcpp-no-exceptions
// <deque>
// void push_back(const value_type& x);
#include <deque>
#include "test_allocator.h"
#include <cassert>
// Flag that makes the copy constructor for CMyClass throw an exception
static bool gCopyConstructorShouldThow = false;
class CMyClass {
public: CMyClass(int tag);
public: CMyClass(const CMyClass& iOther);
public: ~CMyClass();
bool equal(const CMyClass &rhs) const
{ return fTag == rhs.fTag && fMagicValue == rhs.fMagicValue; }
private:
int fMagicValue;
int fTag;
private: static int kStartedConstructionMagicValue;
private: static int kFinishedConstructionMagicValue;
};
// Value for fMagicValue when the constructor has started running, but not yet finished
int CMyClass::kStartedConstructionMagicValue = 0;
// Value for fMagicValue when the constructor has finished running
int CMyClass::kFinishedConstructionMagicValue = 12345;
CMyClass::CMyClass(int tag) :
fMagicValue(kStartedConstructionMagicValue), fTag(tag)
{
// Signal that the constructor has finished running
fMagicValue = kFinishedConstructionMagicValue;
}
CMyClass::CMyClass(const CMyClass& iOther) :
fMagicValue(kStartedConstructionMagicValue), fTag(iOther.fTag)
{
// If requested, throw an exception _before_ setting fMagicValue to kFinishedConstructionMagicValue
if (gCopyConstructorShouldThow) {
throw std::exception();
}
// Signal that the constructor has finished running
fMagicValue = kFinishedConstructionMagicValue;
}
CMyClass::~CMyClass() {
// Only instances for which the constructor has finished running should be destructed
assert(fMagicValue == kFinishedConstructionMagicValue);
}
bool operator==(const CMyClass &lhs, const CMyClass &rhs) { return lhs.equal(rhs); }
int main()
{
CMyClass instance(42);
{
std::deque<CMyClass> vec;
vec.push_back(instance);
std::deque<CMyClass> vec2(vec);
gCopyConstructorShouldThow = true;
try {
vec.push_back(instance);
assert(false);
}
catch (...) {
gCopyConstructorShouldThow = false;
assert(vec==vec2);
}
}
{
typedef std::deque<CMyClass, test_allocator<CMyClass> > C;
C vec;
C vec2(vec);
C::allocator_type::throw_after = 1;
try {
vec.push_back(instance);
assert(false);
}
catch (...) {
assert(vec==vec2);
}
}
}
|
