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From: Mark Summerfield <m.n.summerfield@gmail.com>
Newsgroups: comp.lang.tcl
Subject: Re: failing to understand/use lambda
Date: Wed, 25 Jun 2025 09:26:01 -0000 (UTC)
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On Wed, 25 Jun 2025 11:02:09 +0200, Ralf Fassel wrote:

> * Mark Summerfield <m.n.summerfield@gmail.com>
> | oo::define Store method add {args} {
> |     puts "action: adding [llength $args] new files"
> |     $Reporter "adding [llength $args] new files"
> | }
> --<snip-snip>--
> | Actual output:
>>
> | action: adding 3 new files
> | invalid command name "::apply {message { puts "reporter: $message" }}"
> 
> Note that I have no experience with lambda(n), but the error message
> sounds like you need
> 
>   {*}$Reporter "adding ..."
> 
> when calling the reporter (i.e. expand the command being called).
> 
> HTH
> R'

Fabulous! That's all it took. _And_ I now understand the error message;
Tcl was getting the entire string as the command, but using {*} broke
it down into its constituents.

PS I use the Pan newsreader and ever with wrap off it still messes up
my posts when it comes to code (e.g., seemingly randomly ignoring
newlines).