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From: Alan Grunwald <nospam.nurdglaw@gmail.com>
Newsgroups: comp.lang.tcl
Subject: Parsing namespace name strings
Date: Fri, 29 Nov 2024 21:03:25 +0000
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I find I regularly want to know things like "what is first part of a 
namespace name", "the first two parts" etc. I generally want to get the 
same answer whether the name is a::b::c or ::a::b::c.

I can (and do) do this by getting a list of parts via something like

split [string map {"::" ":"} $name] ":"

but this is clunky - is there something like [namespace split] that 
would return a list of parts?

For example, I'd like namespace split a::b::c to return {a b c}, and 
namespace split ::d::e::f::g to return {d e f g}.

As a followup, if I write a proc namespaceSplit that does what I want, 
is there a user-level way to modify the [namespace] command so that a 
can execute namespaceSplit via [namespace split]?

Many thanks