NAME

       tcl::transform::observe - Observer transformation, stream copy

SYNOPSIS

       package require Tcl  8.6

       package require tcl::transform::core  ?1?

       package require tcl::transform::observe  ?1?

       ::tcl::transform::observe chan logw logr

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DESCRIPTION

       The  tcl::transform::observer  package  provides a command creating a channel transformation which passes
       the read and written bytes through unchanged (like tcl::transform::identity), but additionally copies the
       data it has seen for each direction into channels specified at construction time.

       Related   transformations   in   this   module   are   tcl::transform::adler32,  tcl::transform::counter,
       tcl::transform::crc32, and tcl::transform::identity.

       The internal TclOO class implementing the transform handler is a sub-class  of  the  tcl::transform::core
       framework.

API

       ::tcl::transform::observe chan logw logr
              This command creates an observer transformation on top of the channel chan and returns its handle.
              The channel handles logr and logw are there the data is copied to.

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.

KEYWORDS

       channel transformation, observer, reflected  channel,  stream  copy,  tip  230,  transformation,  virtual
       channel

CATEGORY

       Channels

COPYRIGHT

       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>