invoke_int_0.pass.cpp revision f5256e16dfc425c1d466f6308d4026d529ce9e0b 
1//===----------------------------------------------------------------------===//
2//
3//                     The LLVM Compiler Infrastructure
4//
5// This file is distributed under the University of Illinois Open Source
6// License. See LICENSE.TXT for details.
7//
8//===----------------------------------------------------------------------===//
9
10// <functional>
11
12// reference_wrapper
13
14// template <class... ArgTypes>
15//   requires Callable<T, ArgTypes&&...>
16//   Callable<T, ArgTypes&&...>::result_type
17//   operator()(ArgTypes&&... args) const;
18
19#include <functional>
20#include <cassert>
21
22// 0 args, return int
23
24int count = 0;
25
26int f_int_0()
27{
28    return 3;
29}
30
31struct A_int_0
32{
33    int operator()() {return 4;}
34};
35
36void
37test_int_0()
38{
39    // function
40    {
41    std::reference_wrapper<int ()> r1(f_int_0);
42    assert(r1() == 3);
43    }
44    // function pointer
45    {
46    int (*fp)() = f_int_0;
47    std::reference_wrapper<int (*)()> r1(fp);
48    assert(r1() == 3);
49    }
50    // functor
51    {
52    A_int_0 a0;
53    std::reference_wrapper<A_int_0> r1(a0);
54    assert(r1() == 4);
55    }
56}
57
58
59// 1 arg, return void
60
61void f_void_1(int i)
62{
63    count += i;
64}
65
66struct A_void_1
67{
68    void operator()(int i)
69    {
70        count += i;
71    }
72};
73
74int main()
75{
76    test_int_0();
77}
78