blob: 403d646f4216e2ad39478ad8e8f5c85ca56524c4 (
plain) (
blame)
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
103
104
105
106
|
//===----------------------------------------------------------------------===//
//
// 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: c++98, c++03
// <functional>
// class function<R(ArgTypes...)>
// template<class A> function(allocator_arg_t, const A&, function&&);
#include <functional>
#include <memory>
#include <cassert>
#include "test_macros.h"
#include "min_allocator.h"
#include "count_new.hpp"
class A
{
int data_[10];
public:
static int count;
A()
{
++count;
for (int i = 0; i < 10; ++i)
data_[i] = i;
}
A(const A&) {++count;}
~A() {--count;}
int operator()(int i) const
{
for (int j = 0; j < 10; ++j)
i += data_[j];
return i;
}
};
int A::count = 0;
int g(int) { return 0; }
int main()
{
assert(globalMemCounter.checkOutstandingNewEq(0));
{
std::function<int(int)> f = A();
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(f.target<A>());
assert(f.target<int(*)(int)>() == 0);
std::function<int(int)> f2(std::allocator_arg, bare_allocator<A>(), std::move(f));
assert(A::count == 1);
assert(globalMemCounter.checkOutstandingNewEq(1));
assert(f2.target<A>());
assert(f2.target<int(*)(int)>() == 0);
assert(f.target<A>() == 0);
assert(f.target<int(*)(int)>() == 0);
}
assert(globalMemCounter.checkOutstandingNewEq(0));
{
// Test that moving a function constructed from a reference wrapper
// is done without allocating.
DisableAllocationGuard g;
using Ref = std::reference_wrapper<A>;
A a;
Ref aref(a);
std::function<int(int)> f(aref);
assert(A::count == 1);
assert(f.target<A>() == nullptr);
assert(f.target<Ref>());
std::function<int(int)> f2(std::allocator_arg, std::allocator<void>{},
std::move(f));
assert(A::count == 1);
assert(f2.target<A>() == nullptr);
assert(f2.target<Ref>());
assert(f.target<Ref>()); // f is unchanged because the target is small
}
{
// Test that moving a function constructed from a function pointer
// is done without allocating
DisableAllocationGuard guard;
using Ptr = int(*)(int);
Ptr p = g;
std::function<int(int)> f(p);
assert(f.target<A>() == nullptr);
assert(f.target<Ptr>());
std::function<int(int)> f2(std::allocator_arg, std::allocator<void>(),
std::move(f));
assert(f2.target<A>() == nullptr);
assert(f2.target<Ptr>());
assert(f.target<Ptr>()); // f is unchanged because the target is small
}
}
|
