Tcl Library Source Code

EuroTcl/OpenACS 11 - 12 JULY 2024, VIENNA

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tcl::chan::facade - Facade channel

Table Of Contents


package require Tcl 8.5 9
package require TclOO
package require logger
package require tcl::chan::core ?1.1?
package require tcl::chan::facade ?1.1?

::tcl::chan::facade chan


The tcl::chan::facade package provides a command creating facades to other channels. These are channels which own a single subordinate channel and delegate all operations to.

The main use for facades is the debugging of actions on a channel. While most of the information could be tracked by a virtual channel transformation it does not have access to the event-related operation, and furthermore they are only available in Tcl 8.6.

Therefore this channel, usable with Tcl 8.5, and having access to everything going on for a channel.

The intercepted actions on channel are logged through package logger.

Beyond that facades provide the following additional channel configuration options:

Of these only option -user is writable.


Bugs, Ideas, Feedback

This document, and the package it describes, will undoubtedly contain bugs and other problems. Please report such in the category virtchannel of the Tcllib Trackers. 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 output 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.


concatenation channel, reflected channel, tip 219, virtual channel




Copyright © 2011 Andreas Kupries