1//===----------------------------------------------------------------------===//
2//
3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
4// See https://llvm.org/LICENSE.txt for license information.
5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
6//
7//===----------------------------------------------------------------------===//
8
9// UNSUPPORTED: c++03
10
11// <functional>
12
13// class function<R(ArgTypes...)>
14
15// template<class F, class A> void assign(F&&, const A&);
16// This call was removed post-C++14
17
18#include <functional>
19#include <cassert>
20
21#include "test_macros.h"
22#include "test_allocator.h"
23
24class A
25{
26 int data_[10];
27public:
28 static int count;
29
30 A()
31 {
32 ++count;
33 for (int i = 0; i < 10; ++i)
34 data_[i] = i;
35 }
36
37 A(const A&) {++count;}
38
39 ~A() {--count;}
40
41 int operator()(int i) const
42 {
43 for (int j = 0; j < 10; ++j)
44 i += data_[j];
45 return i;
46 }
47
48 int foo(int) const {return 1;}
49};
50
51int A::count = 0;
52
53int main(int, char**)
54{
55#if TEST_STD_VER <= 14
56 {
57 std::function<int(int)> f;
58 f.assign(A(), test_allocator<A>());
59 assert(A::count == 1);
60 assert(f.target<A>());
61 assert(f.target<int(*)(int)>() == 0);
62 }
63 assert(A::count == 0);
64#endif
65
66 return 0;
67}
68

source code of libcxx/test/std/utilities/function.objects/func.wrap/func.wrap.func/func.wrap.func.mod/assign_F_alloc.pass.cpp