| Allegro CL version 6.1 Unrevised | |||||||||
Arguments: stream &rest flag-names
This macro adds (via logior) the specified instance flags to the standard-instance object that is the stream. Note that this flags field has no correlation to a flags slot in the stream. You may inspect a stream in raw mode to see the instance-flags (see inspector.htm).
Valid instance flags are placed into the following groups:
:gray
(identifies a Gray or fundamental-stream) or
:simple (identifies a simple-stream).
A stream instance that has neither bit set is not considered a stream.
:input
(stream may perform input operations); :output
(stream may perform output operations). A stream instance that has
neither bit set is not considered an open stream.
:dual (stream is a dual-channel stream);
:string (stream is a string-stream). A stream with
neither bit set is considered a single-channel stream
You must load the :iodefs module to use this
macro. Do that by evaluating (require :iodefs). (It
is not an error to evaluate that form if the module is already
loaded.) This macro is intended for implementing device-level
functionality and should not be used except for that purpose. See Simple-stream Description
in streams.htm for a description of the device-level.
See streams.htm for information on the simple-streams implementation in Allegro CL.
Copyright (c) 1998-2001, Franz Inc. Berkeley, CA., USA. All rights reserved.
Documentation for Allegro CL version 6.1 update # 1. This page was not revised.
Created 2001.12.15.
| Allegro CL version 6.1 Unrevised | |||||||||