ProtocolRole.h

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// break out the Protocol Roles (ie. port interfaces) into a separate include file which can be used
// in building capsule translation units without carrying along the entire weight of the Connector template classes

#ifndef H_PROLE
#define H_PROLE

#ifndef NO_DEPENDENCY_INCLUDES
#include <iostream>
#endif


namespace Connector
{

    template < typename Payload > 
    struct InputPort
    {
        virtual operator const Payload &( ) = 0;
    };


    template < typename Payload > 
    struct OutputPort
    {
        virtual operator Payload &() = 0;
    };

    
    template< typename Key, typename Payload >
    struct LookupInputPort
    {
        virtual const Payload &operator() ( const Key & ) = 0;
    };
    
    
    template< typename Key, typename Payload >
    struct BinnedOutputPort
    {
        virtual Payload &operator() ( const Key & ) = 0;
    };


    struct MonitorPort 
    {
        virtual operator std::ostream &();
    };
    
}; // namespace Connector

#endif

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