empty_source.hpp

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#ifndef Om_Source_EmptySource_
 
    #define Om_Source_EmptySource_ \
    Om::Source::EmptySource
 
    #include "om/source/default_source.hpp"
 
namespace Om {
 
    namespace Source {
 
        // MARK: - Om::Source::EmptySource
 
        template <typename ThisItem>
        class EmptySource:
        public DefaultSource<
            ThisItem,
            EmptySource<ThisItem>
        > {
 
        public: // MARK: public (static)
 
            static EmptySource & Get();
 
        public: // MARK: public (non-static)
 
            EmptySource();
 
            EmptySource & operator =(EmptySource);
 
            virtual bool operator !() const;
 
            virtual ThisItem & operator *() const;
 
            using DefaultSource<
                ThisItem,
                EmptySource<ThisItem>
            >::Equals;
 
            bool Equals(EmptySource const &) const;
 
            virtual void Pop();
 
            void Swap(EmptySource &);
 
        };
 
        // MARK: - Om::Source::
 
        template <typename TheItem>
        bool operator ==(
            EmptySource<TheItem> const &,
            EmptySource<TheItem> const &
        );
 
        template <typename TheItem>
        bool operator !=(
            EmptySource<TheItem> const &,
            EmptySource<TheItem> const &
        );
 
    }
 
}
 
namespace boost {
 
    // MARK: - boost::
 
    template <typename TheItem>
    void swap(
        Om::Source::EmptySource<TheItem> &,
        Om::Source::EmptySource<TheItem> &
    );
 
}
 
    #include "om/source/empty_source.cpp"
 
#endif