tcl::chan::null(3tcl) Reflected/virtual channel support tcl::chan::null(3tcl)
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NAME
tcl::chan::null - Null channel
SYNOPSIS
package require Tcl 8.5
package require TclOO
package require tcl::chan::events ?1?
package require tcl::chan::null ?1?
::tcl::chan::null
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DESCRIPTION
The tcl::chan::null package provides a command creating null channels,
i.e. write-only channels which immediately forget whatever is written
to them. This is equivalent to the null channels provided by the pack-
age Memchan, except that this is written in pure Tcl, not C. On the
other hand, Memchan is usable with Tcl 8.4 and before, whereas this
package requires Tcl 8.5 or higher, and TclOO.
Packages related to this are tcl::chan::zero and tcl::chan::nullzero.
The internal TclOO class implementing the channel handler is a sub-
class of the tcl::chan::events framework.
API
::tcl::chan::null
This command creates a new null channel and returns its handle.
BUGS, IDEAS, FEEDBACK
This document, and the package it describes, will undoubtedly contain
bugs and other problems. Please report such in the category virtchan-
nel of the Tcllib Trackers [http://core.tcl.tk/tcllib/reportlist].
Please also report any ideas for enhancements you may have for either
package and/or documentation.
When proposing code changes, please provide unified diffs, i.e the out-
put of diff -u.
Note further that attachments are strongly preferred over inlined
patches. Attachments can be made by going to the Edit form of the
ticket immediately after its creation, and then using the left-most
button in the secondary navigation bar.
KEYWORDS
/dev/null, null, reflected channel, tip 219, virtual channel
CATEGORY
Channels
COPYRIGHT
Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>
tcllib 1 tcl::chan::null(3tcl)