1 // comment if you want to see the boost::move issue
2 #define BOOST_THREAD_VERSION 3
3
4 #include <boost/type_traits/is_same.hpp>
5 #include <boost/variant/detail/apply_visitor_binary.hpp>
6 #include <boost/variant/static_visitor.hpp>
7 #include <boost/variant/variant.hpp>
8 #include <boost/smart_ptr/shared_ptr.hpp>
9
10 #define WANT_BUILD_TO_FAIL
11 #ifdef WANT_BUILD_TO_FAIL
12 #include <boost/thread.hpp>
13 #endif
14
15 class AType
16 {
17
18 };
19
20 class BType
21 {
22 };
23
24 typedef boost::shared_ptr<AType> IATypePtr;
25 typedef boost::shared_ptr<BType> IBTypePtr;
26
27 typedef boost::variant<IATypePtr, IBTypePtr> ABVar;
28
29 struct ServiceTimeTableEvent
30 {
31 public:
32
ServiceTimeTableEventServiceTimeTableEvent33 ServiceTimeTableEvent(ABVar abType)
34 : m_abType{ abType }
35 {}
36
GetABTypeServiceTimeTableEvent37 inline ABVar const& GetABType() const { return m_abType; }
GetABTypeServiceTimeTableEvent38 inline ABVar & GetABType() { return m_abType; }
39
40 private:
41 ABVar m_abType;
42 };
43
44 class ab_are_equals
45 : public boost::static_visitor<bool>
46 {
47 public:
48 template<typename T, typename U>
operator ()(T,U) const49 bool operator()(T, U) const
50 {
51 return false; // cannot compare different types
52 }
53 template<typename T>
operator ()(T lhs,T rhs) const54 bool operator()(T lhs, T rhs) const
55 {
56 return lhs == rhs;
57 }
58 };
59
main(int argc,char * argv[])60 int main(int argc, char* argv[])
61 {
62
63 auto aTypePtr = IATypePtr{ new AType };
64 auto bTypePtr = IBTypePtr{ new BType };
65
66 ABVar aType = aTypePtr;
67 ABVar bType = bTypePtr;
68
69 ServiceTimeTableEvent timeTableEvent1{ aType };
70 ServiceTimeTableEvent timeTableEvent2{ bType };
71
72 auto xx = boost::apply_visitor(ab_are_equals(), timeTableEvent1.GetABType(), timeTableEvent2.GetABType());
73 xx = boost::apply_visitor(ab_are_equals(), timeTableEvent1.GetABType(), timeTableEvent1.GetABType());;
74 xx = boost::apply_visitor(ab_are_equals(), timeTableEvent2.GetABType(), timeTableEvent2.GetABType());;
75 }
76
77
78