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//===----------------------------------------------------------------------===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
// UNSUPPORTED: no-exceptions
// <deque>
// void push_front(const value_type& x);
#include <deque>
#include <cassert>
#include "test_macros.h"
#include "test_allocator.h"
// Flag that makes the copy constructor for CMyClass throw an exception
static bool gCopyConstructorShouldThrow = 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 (gCopyConstructorShouldThrow) {
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(int, char**)
{
CMyClass instance(42);
{
std::deque<CMyClass> vec;
vec.push_front(instance);
std::deque<CMyClass> vec2(vec);
gCopyConstructorShouldThrow = true;
try {
vec.push_front(instance);
assert(false);
}
catch (...) {
gCopyConstructorShouldThrow = false;
assert(vec == vec2);
}
}
{
test_allocator_statistics alloc_stats;
typedef std::deque<CMyClass, test_allocator<CMyClass> > C;
C vec((test_allocator<CMyClass>(&alloc_stats)));
C vec2(vec, test_allocator<CMyClass>(&alloc_stats));
alloc_stats.throw_after = 1;
try {
vec.push_front(instance);
assert(false);
}
catch (...) {
assert(vec==vec2);
}
}
return 0;
}
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