tcl::chan::core(3tcl)

💖 tcl::chan::core 💖

okay bestie, so this is tcl::chan::core, a page from the Reflected/virtual channel support corner of the tcllib manual, version 1.1. she's a little helper class and she's lowkey carrying the whole reflected-channel game. let's get into it 🫶

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✨ NAME ✨

tcl::chan::core — the basic reflected/virtual channel support. the foundation, the blueprint, the moment 💅

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🌸 SYNOPSIS 🌸

package require Tcl 8.5 9

package require TclOO

package require tcl::chan::core ?1.1?

::tcl::chan::core objectName

objectName initialize thechannel mode

objectName finalize thechannel

objectName destroy

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🦋 DESCRIPTION 🦋

so the tcl::chan::core package hands you a TclOO class that implements the common behaviour that virtually every reflected or virtual channel needs — literally the init and the finalize, the getting-ready and the wrapping-up. it's giving "group project member who actually does their part" ✨

the way this class expects to be used is either as the superclass of a concrete channel class, or mixed into a class like that. either way, she's the base layer. 🎀

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👑 CLASS API 👑

• ::tcl::chan::core objectName — this creates a brand new channel core object, and it comes with a global Tcl command whose name is objectName. you can call that command to do all kinds of operations on the object, and those are described down in the Instance API section. main character creation energy, fr fr 💜

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🧚 INSTANCE API 🧚

the API of channel core instances gives you exactly two methods, and both of them line up with channel handler commands (for reference, see TIP 219 at http:/tip.tcl.tk/219). they expect to be called from whichever object instance the channel core was made a part of, no cap.

• objectName initialize thechannel mode — this one implements the standard behaviour for the initialize method of channel handlers. using introspection, it goes and finds the handler methods that the instance supports, then returns a list with their names — exactly the shape the reflected-channel support in the Tcl core expects. 👑

it also remembers the channel handle in an instance variable, so sub-classes can get at it later. storing it for the girlies, iconic.

• objectName finalize thechannel — this implements the standard behaviour for the finalize method of channel handlers. it literally just destroys itself. that's it. that's the method. 💀
• objectName destroy — destroying the channel core instance closes the channel it was initialized for (peep the initialize method above). BUT — and this is the important bit — when it gets destroyed from within a call of finalize, that closing does not happen, on the assumption that Tcl itself is already destroying the channel. so like, don't double-destroy, bestie, she knows what she's doing. 🌈

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😭 BUGS, IDEAS, FEEDBACK 😭

ngl, this document and the package it describes will undoubtedly contain bugs and other problems. that's just the vibe of software. so please report them in the category virtchannel of the Tcllib Trackers at http://core.tcl.tk/tcllib/reportlist. and if you've got ideas for enhancements for either the package and/or the documentation, send those in too, we love a glow-up suggestion 🫶

when you're proposing code changes, please provide unified diffs, i.e. the output of diff -u. we're not doing vibes-only patches here.

also note: attachments are strongly preferred over inlined patches. you can attach stuff by going to the Edit form of the ticket right after it's created, and then using the left-most button in the secondary navigation bar. so easy, so slay. ✨

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💅 KEYWORDS 💅

• reflected channel
• tip 219
• virtual channel

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🍓 CATEGORY 🍓

Channels

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💜 COPYRIGHT 💜

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

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and that's the whole page, bestie!! 💖 this was tcl::chan::core(3tcl) from tcllib 1.1 — go forth and build your reflected channels, you absolute icon, periodt 👑✨🎀