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April 06, 2005
Protecting parameter contents
Walter (and anyone else),
can you explain exactly what is your objection to providing some simple
mechanism for coders to prevent a called function from modifying the
contents of arrays and aggregates passed to the function?

And, in the absence of such a simple mechanism, what technique would you
recommend for coders to employ, that would have the same effect? Can you
provide example code as well?

I ask this because it is currently causing me some grief. I'm trying to
emulate the functionality of the Euphoria language. It has only one method
of passing parameters - (effectively) passing by value. I say 'effectively'
because in actuality, it passes a reference to an array but ensures that
the array's contents are preserved upon returning to the caller. Note that
an array in Euphoria can contain references to other arrays, and those
arrays' contents are also protected automatically.

-- 
Derek Parnell
Melbourne, Australia
http://www.dsource.org/projects/build/ v1.19 released 04/Apr/2005
http://www.prowiki.org/wiki4d/wiki.cgi?FrontPage
6/04/2005 10:32:02 AM
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