[plt-scheme] seek/tell for ports...

From: Matthew Flatt (mflatt at cs.utah.edu)
Date: Wed Dec 17 08:33:47 EST 2003

At Wed, 17 Dec 2003 09:46:58 +0200, "Dor Kleiman" wrote:
> Is it possible to do that with a non-file port?

Seeting the position only works for (certain) file-stream ports and for
string ports.

> If it does, why is it called 'file-position'?

Historical reasons. It should have been called `port-position'.

> If it doesn't, why not?

The underlying stream model doesn't support setting the position in
general. A pipe, for example, doesn't keep any content that has already
been read.


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