1tcl::chan::null(n)     Reflected/virtual channel support    tcl::chan::null(n)
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NAME

8       tcl::chan::null - Null channel
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SYNOPSIS

11       package require Tcl  8.5
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13       package require TclOO
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15       package require tcl::chan::events  ?1?
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17       package require tcl::chan::null  ?1?
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19       ::tcl::chan::null
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DESCRIPTION

24       The  tcl::chan::null package provides a command creating null channels,
25       i.e. write-only channels which immediately forget whatever  is  written
26       to  them. This is equivalent to the null channels provided by the pack‐
27       age Memchan, except that this is written in pure Tcl,  not  C.  On  the
28       other  hand,  Memchan  is  usable with Tcl 8.4 and before, whereas this
29       package requires Tcl 8.5 or higher, and TclOO.
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31       Packages related to this are tcl::chan::zero and tcl::chan::nullzero.
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33       The internal TclOO class implementing the channel  handler  is  a  sub-
34       class of the tcl::chan::events framework.
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API

37       ::tcl::chan::null
38              This command creates a new null channel and returns its handle.
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BUGS, IDEAS, FEEDBACK

41       This  document,  and the package it describes, will undoubtedly contain
42       bugs and other problems.  Please report such in the category  virtchan‐
43       nel  of  the  Tcllib  Trackers  [http://core.tcl.tk/tcllib/reportlist].
44       Please also report any ideas for enhancements you may have  for  either
45       package and/or documentation.
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47       When proposing code changes, please provide unified diffs, i.e the out‐
48       put of diff -u.
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50       Note further that  attachments  are  strongly  preferred  over  inlined
51       patches.  Attachments  can  be  made  by  going to the Edit form of the
52       ticket immediately after its creation, and  then  using  the  left-most
53       button in the secondary navigation bar.
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KEYWORDS

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

59       Channels
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62       Copyright (c) 2009 Andreas Kupries <andreas_kupries@users.sourceforge.net>
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67tcllib                                 1                    tcl::chan::null(n)
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