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  1. OMG Issue

CPP11 — Add _narrow() operation to each POA servant

  • Key: CPP11-261
  • Legacy Issue Number: 1534
  • Status: closed  
  • Source: Anonymous
  • Summary:

    Summary: 1. The C++ spec requires that all POA servant classes derive from
    PortableServer::ServantBase as a virtual base class. For C++
    environments without RTTI, it is then impossible for the programmer to
    narrow a servant received from the POA via reference_to_servant() or
    id_to_servant() back to the programmer"s specific servant class.

    Proposal: Add a _narrow() operation to each POA servant class in the
    same fashion that _narrow() operations are defined for exception

    // IDL
    interface A { };

    // C++
    class POA_A : public virtual PortableServer::ServantBase

    { public: POA_A *_narrow(PortableServer::Servant); }


    The _narrow() operation will return a valid pointer if the servant isa
    POA_A, otherwise it returns 0.

  • Reported: CPP 1.0b2 — Thu, 18 Jun 1998 04:00 GMT
  • Disposition: Resolved — CPP 1.1
  • Disposition Summary:

    :ServantBase as a virtual base class. For C++

  • Updated: Sun, 8 Mar 2015 15:33 GMT