tcl::chan::cat(3tcl) Reflected/virtual channel support tcl::chan::cat(3tcl)
______________________________________________________________________________
NAME
tcl::chan::cat - Concatenation channel
SYNOPSIS
package require Tcl 8.5
package require TclOO
package require tcl::chan::core ?1?
package require tcl::chan::cat ?1.0.3?
::tcl::chan::cat chan...
______________________________________________________________________________
DESCRIPTION
The tcl::chan::cat package provides a command creating concatenation
channels. These are non-seekable channels owning a list of subordinate
channels whose contents they return in order, until all are exhausted.
In this manner the channel is the concatentation of the contents of all
the sub-ordinate channels.
Note that the created channels take ownership of the channels they were
constructed with. Whenever they have exhausted one of their channel it
will be closed. Similarly, closing the cat channel will close all the
sub-ordinates it still has.
The internal TclOO class implementing the channel handler is a sub-
class of the tcl::chan::core framework.
Event handling is delegated to the currently active sub-channel.
API
::tcl::chan::cat chan...
This command creates the concatenation channel using all the
provided channels, 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
concatenation channel, reflected channel, tip 219, virtual channel
CATEGORY
Channels
COPYRIGHT
Copyright (c) 2011 Andreas Kupries <andreas_kupries@users.sourceforge.net>
tcllib 1.0.3 tcl::chan::cat(3tcl)