🚀 go-pugleaf

jdmorris@ix.netcom.com (Jason D. Morris) wrote:

>#ifndef PROPERTY_H__
>#define PROPERTY_H__
>
>// The property class controls access to a captive variable.
>// It captures the get/set pattern.  This class first appeared
>// in the November/December 1995 Vol. 7 / No. 9 Issue of C++ Report
>// in the article Patterns in Practice: A property template for C++
>// by Colin Hastie.
>
>template < class T >
>class property
>{
>private:
>    T content;  // captive variable
>    
>    // non-implemented non-accessible assignment operator
>    void operator =( const property< T >& );
>
>public:
>    // ctors
>    property() {}
>    property< T >( const T& t )
>        : content( t )
>    {}
>
>    // accessors
>    T operator()() const   // get
>    { return content; }
>
>    void operator()( const T& t )  // set
>    { content = t; }
>};
>
>#endif
>
>
>To use this class you'd do something like this...
>
>class foo
>{
>public:
>    property< int > foo_number;
>};

On the surface this sounds good.  The obvious problem is the issue of
access.  You may want the a private set and public get.

Another problem is you are unable to perform any validation within the
set function.

Lastly the naming of the data member/accessors breaks most common
styles.  Usually the member functions are distingiushed in some manner
from the data members.

===============================================
DISCLAIMER: I may be a member of humanity,
but I'm not a spokesman for humanity.
	davidb@datalytics.com
---
[ comp.std.c++ is moderated.  To submit articles: Try just posting with your 
                newsreader.  If that fails, use mailto:std-c++@ncar.ucar.edu
  comp.std.c++ FAQ: http://reality.sgi.com/austern/std-c++/faq.html
  Moderation policy: http://reality.sgi.com/austern/std-c++/policy.html
  Comments? mailto:std-c++-request@ncar.ucar.edu 
]