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/* -*- C++ -*- */
// $Id$
// ============================================================================
//
// = LIBRARY
// TAO
//
// = FILENAME
// Union.h
//
// = AUTHOR
//
// Aniruddha Gokhale (Idea by Carlos O'Ryan)
//
// ============================================================================
#ifndef TAO_UNION_H
# define TAO_UNION_H
class TAO_Export TAO_Base_Union
{
// = TITLE
// Base class for TAO Unions.
//
// = DESCRIPTION
// This class provides a common interface for all IDL unions,
// hence the interpreted marshal engine can manipulate them in a
// type-safe manner.
public:
friend class TAO_Marshal_Union;
// We give access to TAO_Marshal_Union, this allows a safe
// implementation of the marshal engine.
virtual ~TAO_Base_Union (void);
// destructor.
virtual void *_discriminant (void) = 0;
// Return pointer to the discriminant.
virtual void *_access (CORBA::Boolean flag) = 0;
// Provides access to the right data member at the right offset. If
// the flag is TRUE, we allocate the necessary storage. This will be
// required for the decoding side.
virtual void _reset (void) = 0;
// Free existing storage.
protected:
TAO_Base_Union (void);
// Default constructor.
};
#endif /* TAO_BASE_UNION_H */
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