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
|
/* Copyright 2005 - 2016, The libsigc++ Development Team
* Assigned to public domain. Use as you wish without restriction.
*/
#include "testutilities.h"
#include <sigc++/sigc++.h>
namespace
{
std::ostringstream result_stream;
class Param : public sigc::trackable
{
public:
explicit Param(const std::string& name) : name_(name) {}
// non-copyable,
// so it can only be used with sigc::bind() via sigc::ref()
Param(const Param&) = delete;
Param& operator=(const Param&) = delete;
// non movable:
Param(Param&&) = delete;
Param& operator=(Param&&) = delete;
std::string name_;
};
void
handler(Param& param)
{
result_stream << " handler(param): param.name_=" << param.name_;
}
} // end anonymous namespace
int
main(int argc, char* argv[])
{
auto util = TestUtilities::get_instance();
if (!util->check_command_args(argc, argv))
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
auto slot_full = sigc::ptr_fun(&handler);
sigc::slot<void()> slot_bound;
slot_bound();
util->check_result(result_stream, "");
{
// Because Param derives from sigc::trackable(), std::ref() should disconnect
// the signal handler when param is destroyed.
Param param("murrayc");
// A convoluted way to do
// slot_bound = sigc::bind(slot_full, std::ref(param));
slot_bound = sigc::bind<-1, decltype(slot_full), std::reference_wrapper<Param>>(
slot_full, std::ref(param));
result_stream << "Calling slot when param exists:";
slot_bound();
util->check_result(
result_stream, "Calling slot when param exists: handler(param): param.name_=murrayc");
} // auto-disconnect
result_stream << "Calling slot when param does not exist:";
slot_bound();
util->check_result(result_stream, "Calling slot when param does not exist:");
return util->get_result_and_delete_instance() ? EXIT_SUCCESS : EXIT_FAILURE;
}
|
