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 
24 class A
25 {
26     int data_[10];
27 public:
28     static int count;
29 
A()30     A()
31     {
32         ++count;
33         for (int i = 0; i < 10; ++i)
34             data_[i] = i;
35     }
36 
A(const A &)37     A(const A&) {++count;}
38 
~A()39     ~A() {--count;}
40 
operator ()(int i) const41     int operator()(int i) const
42     {
43         for (int j = 0; j < 10; ++j)
44             i += data_[j];
45         return i;
46     }
47 
foo(int) const48     int foo(int) const {return 1;}
49 };
50 
51 int A::count = 0;
52 
main(int,char **)53 int 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