Re: Representation Clauses And Freezing

[Ted Dennison <dennison@telepath.com>]

In article <ujme5.27$Al5.45903@news.pacbell.net>,
  tmoran@bix.com wrote:
> >operations are class-wide. No matter how you extend the message, the
> >base class needs to be able to determine where the "real" data is in
the
> >record, how big it is, how to checksum it, how to interpret it as raw
> >bytes, etc, etc. In a weakly typed language, you could do this by
>
> You can really do a lot with Streams.  You can of course define a
> 'Write to one child of Root_Stream_Type that puts the bytes of the
> data object into a Stream_Element_Array.  But a different child of
> Root_Stream_Type could instead put a kind_of_record_indicator, or a
> checksum, or a length, or even an address into its resulting

To do anything with streams in an enviroment like this (one where you
care what the exact representation of the output is) you need to make
your own 'Write for each and every type you or anyone else will ever
want to write to the stream. But if its only the one tagged type, then
that's not much of a problem.

--
T.E.D.

http://www.telepath.com/~dennison/Ted/TED.html


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