78 lines
1.8 KiB
C++
78 lines
1.8 KiB
C++
// comment if you want to see the boost::move issue
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#define BOOST_THREAD_VERSION 3
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#include <boost/type_traits/is_same.hpp>
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#include <boost/variant/detail/apply_visitor_binary.hpp>
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#include <boost/variant/static_visitor.hpp>
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#include <boost/variant/variant.hpp>
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#include <boost/smart_ptr/shared_ptr.hpp>
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#define WANT_BUILD_TO_FAIL
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#ifdef WANT_BUILD_TO_FAIL
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#include <boost/thread.hpp>
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#endif
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class AType
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{
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};
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class BType
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{
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};
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typedef boost::shared_ptr<AType> IATypePtr;
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typedef boost::shared_ptr<BType> IBTypePtr;
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typedef boost::variant<IATypePtr, IBTypePtr> ABVar;
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struct ServiceTimeTableEvent
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{
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public:
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ServiceTimeTableEvent(ABVar abType)
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: m_abType{ abType }
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{}
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inline ABVar const& GetABType() const { return m_abType; }
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inline ABVar & GetABType() { return m_abType; }
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private:
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ABVar m_abType;
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};
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class ab_are_equals
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: public boost::static_visitor<bool>
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{
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public:
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template<typename T, typename U>
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bool operator()(T, U) const
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{
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return false; // cannot compare different types
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}
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template<typename T>
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bool operator()(T lhs, T rhs) const
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{
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return lhs == rhs;
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}
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};
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int main(int argc, char* argv[])
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{
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auto aTypePtr = IATypePtr{ new AType };
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auto bTypePtr = IBTypePtr{ new BType };
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ABVar aType = aTypePtr;
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ABVar bType = bTypePtr;
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ServiceTimeTableEvent timeTableEvent1{ aType };
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ServiceTimeTableEvent timeTableEvent2{ bType };
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auto xx = boost::apply_visitor(ab_are_equals(), timeTableEvent1.GetABType(), timeTableEvent2.GetABType());
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xx = boost::apply_visitor(ab_are_equals(), timeTableEvent1.GetABType(), timeTableEvent1.GetABType());;
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xx = boost::apply_visitor(ab_are_equals(), timeTableEvent2.GetABType(), timeTableEvent2.GetABType());;
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}
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