tcl::chan::variable - Reflected/virtual channel support

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tcl::chan::variable(n) 1 "Reflected/virtual channel support"


tcl::chan::variable - In-memory channel using variable for storage


  • package require Tcl 8.5
  • package require TclOO
  • package require tcl::chan::events ?1?
  • package require tcl::chan::variable ?1?


The tcl::chan::variable package provides a command creating channels which live purely in memory. They provide random-access, i.e. are seekable. In contrast to the channels created by tcl::chan::memchan the data is not hidden in the channel however, but stored in an associated variable, specified at the time of construction.

Packages related to this are tcl::chan::memchan and tcl::chan::string.

The internal TclOO class implementing the channel handler is a sub-class of the tcl::chan::events framework.


::tcl::chan::variable varname

This command creates a new variable channel and returns its handle. The content of the channel is stored in the associated namespace variable varname.

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. Please also report any ideas for enhancements you may have for either package and/or documentation.



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