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?

       ::tcl::chan::cat chan...

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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  virtchannel  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 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.

KEYWORDS

       concatenation channel, reflected channel, tip 219, virtual channel

CATEGORY

       Channels

COPYRIGHT

       Copyright (c) 2011 Andreas Kupries <andreas_kupries@users.sourceforge.net>