NAME
ACE_Command_Base - 
Defines an abstract class that allows us to invoke commands
without knowing anything about the implementation.
SYNOPSIS
#include <ace/Functor.h>
class ACE_Command_Base
{
  public:
    ACE_Command_Base (void);
    virtual ~ACE_Command_Base (void);
    virtual int execute (void *arg = 0) = 0;
};
DESCRIPTION
 Non-templatized classes and class template specializations for 
 implementing function objects that are used in  various places 
 in ACE.  There are currently two major categories of function
 objects in ACE: GOF Command Pattern objects, and STL-style 
 functors for comparison of container elements.  The command objects
 are invoked via an execute () method, while the STL-style functors are
 invoked via an operator() () method.
Non-templatized classes for implementing the GOF Command Pattern,
also known as functors or function objects.
Initialization and termination methods.
ACE_Command_Base (void);
virtual ~ACE_Command_Base (void);
virtual int execute (void *arg = 0) = 0;
Invokes the method encapsulated by the command, passing along the
passed argument (if any).  Users of classes derived from this
class must ensure that the resulting invocation can tolerate a
null void pointer being passed, or otherwise ensure that this
will never occur.
AUTHOR
Chris Gill           cdgill@cs.wustl.edu
Based on Command Pattern implementations originally done by
Carlos O'Ryan        coryan@cs.wustl.edu  and
Douglas C. Schmidt   schmidt@cs.wustl.edu and
Sergio Flores-Gaitan sergio@cs.wustl.edu
and on STL-style functor implementations originally done by
Irfan Pyarali  irfan@cs.wustl.edu
LIBRARY
ace