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
|
//===----------------------------------------------------------------------===//
//
// 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>
// shared_ptr
// Example move-only deleter
#ifndef DELETER_H
#define DELETER_H
#include <type_traits>
#include <cassert>
struct test_deleter_base
{
static int count;
static int dealloc_count;
};
int test_deleter_base::count = 0;
int test_deleter_base::dealloc_count = 0;
template <class T>
class test_deleter
: public test_deleter_base
{
int state_;
public:
test_deleter() : state_(0) {++count;}
explicit test_deleter(int s) : state_(s) {++count;}
test_deleter(const test_deleter& d)
: state_(d.state_) {++count;}
~test_deleter() {assert(state_ >= 0); --count; state_ = -1;}
int state() const {return state_;}
void set_state(int i) {state_ = i;}
void operator()(T* p) {assert(state_ >= 0); ++dealloc_count; delete p;}
};
template <class T>
void
swap(test_deleter<T>& x, test_deleter<T>& y)
{
test_deleter<T> t(std::move(x));
x = std::move(y);
y = std::move(t);
}
#endif // DELETER_H
|
