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//===----------------------------------------------------------------------===//
//
// 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.
//
//===----------------------------------------------------------------------===//
// <memory>
// unique_ptr
// Example move-only deleter
#ifndef DELETER_H
#define DELETER_H
#include <type_traits>
#include <utility>
#include <cassert>
#include "test_macros.h"
#if TEST_STD_VER >= 11
template <class T>
class Deleter
{
int state_;
Deleter(const Deleter&);
Deleter& operator=(const Deleter&);
public:
Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;}
Deleter& operator=(Deleter&& r)
{
state_ = r.state_;
r.state_ = 0;
return *this;
}
Deleter() : state_(0) {}
explicit Deleter(int s) : state_(s) {}
~Deleter() {assert(state_ >= 0); state_ = -1;}
template <class U>
Deleter(Deleter<U>&& d,
typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
: state_(d.state()) {d.set_state(0);}
private:
template <class U>
Deleter(const Deleter<U>& d,
typename std::enable_if<!std::is_same<U, T>::value>::type* = 0);
public:
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete p;}
};
template <class T>
class Deleter<T[]>
{
int state_;
Deleter(const Deleter&);
Deleter& operator=(const Deleter&);
public:
Deleter(Deleter&& r) : state_(r.state_) {r.state_ = 0;}
Deleter& operator=(Deleter&& r)
{
state_ = r.state_;
r.state_ = 0;
return *this;
}
Deleter() : state_(0) {}
explicit Deleter(int s) : state_(s) {}
~Deleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete [] p;}
};
#else // TEST_STD_VER < 11
template <class T>
class Deleter
{
mutable int state_;
public:
Deleter() : state_(0) {}
explicit Deleter(int s) : state_(s) {}
Deleter(Deleter const & other) : state_(other.state_) {
other.state_ = 0;
}
Deleter& operator=(Deleter const& other) {
state_ = other.state_;
other.state_ = 0;
return *this;
}
~Deleter() {assert(state_ >= 0); state_ = -1;}
template <class U>
Deleter(Deleter<U> d,
typename std::enable_if<!std::is_same<U, T>::value>::type* = 0)
: state_(d.state()) {}
public:
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete p;}
};
template <class T>
class Deleter<T[]>
{
mutable int state_;
public:
Deleter(Deleter const& other) : state_(other.state_) {
other.state_ = 0;
}
Deleter& operator=(Deleter const& other) {
state_ = other.state_;
other.state_ = 0;
return *this;
}
Deleter() : state_(0) {}
explicit Deleter(int s) : state_(s) {}
~Deleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete [] p;}
};
#endif
template <class T>
void
swap(Deleter<T>& x, Deleter<T>& y)
{
Deleter<T> t(std::move(x));
x = std::move(y);
y = std::move(t);
}
template <class T>
class CDeleter
{
int state_;
public:
CDeleter() : state_(0) {}
explicit CDeleter(int s) : state_(s) {}
~CDeleter() {assert(state_ >= 0); state_ = -1;}
template <class U>
CDeleter(const CDeleter<U>& d)
: state_(d.state()) {}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete p;}
};
template <class T>
class CDeleter<T[]>
{
int state_;
public:
CDeleter() : state_(0) {}
explicit CDeleter(int s) : state_(s) {}
~CDeleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete [] p;}
};
template <class T>
void
swap(CDeleter<T>& x, CDeleter<T>& y)
{
CDeleter<T> t(std::move(x));
x = std::move(y);
y = std::move(t);
}
// Non-copyable deleter
template <class T>
class NCDeleter
{
int state_;
NCDeleter(NCDeleter const&);
NCDeleter& operator=(NCDeleter const&);
public:
NCDeleter() : state_(0) {}
explicit NCDeleter(int s) : state_(s) {}
~NCDeleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete p;}
};
template <class T>
class NCDeleter<T[]>
{
int state_;
NCDeleter(NCDeleter const&);
NCDeleter& operator=(NCDeleter const&);
public:
NCDeleter() : state_(0) {}
explicit NCDeleter(int s) : state_(s) {}
~NCDeleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete [] p;}
};
// Non-copyable deleter
template <class T>
class NCConstDeleter
{
int state_;
NCConstDeleter(NCConstDeleter const&);
NCConstDeleter& operator=(NCConstDeleter const&);
public:
NCConstDeleter() : state_(0) {}
explicit NCConstDeleter(int s) : state_(s) {}
~NCConstDeleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) const {delete p;}
};
template <class T>
class NCConstDeleter<T[]>
{
int state_;
NCConstDeleter(NCConstDeleter const&);
NCConstDeleter& operator=(NCConstDeleter const&);
public:
NCConstDeleter() : state_(0) {}
explicit NCConstDeleter(int s) : state_(s) {}
~NCConstDeleter() {assert(state_ >= 0); state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) const {delete [] p;}
};
// Non-copyable deleter
template <class T>
class CopyDeleter
{
int state_;
public:
CopyDeleter() : state_(0) {}
explicit CopyDeleter(int s) : state_(s) {}
~CopyDeleter() {assert(state_ >= 0); state_ = -1;}
CopyDeleter(CopyDeleter const& other) : state_(other.state_) {}
CopyDeleter& operator=(CopyDeleter const& other) {
state_ = other.state_;
return *this;
}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete p;}
};
template <class T>
class CopyDeleter<T[]>
{
int state_;
public:
CopyDeleter() : state_(0) {}
explicit CopyDeleter(int s) : state_(s) {}
~CopyDeleter() {assert(state_ >= 0); state_ = -1;}
CopyDeleter(CopyDeleter const& other) : state_(other.state_) {}
CopyDeleter& operator=(CopyDeleter const& other) {
state_ = other.state_;
return *this;
}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {delete [] p;}
};
#endif // DELETER_H
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