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tcl::chan::null(3tcl) Reflected/virtual channel support tcl::chan::null(3tcl) 





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










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
    package 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
    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


/dev/null, null, reflected channel, tip 219, virtual channel






CATEGORY


Channels






COPYRIGHT


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








  

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