Re: [TCLCORE] Another path to case-tolerant package names

[Andreas K. <and...@ac...>]

> Quoting dg...@ni...:
> > As I've sketched this, there's one troubling implication,
> > and that is there is one group who are measurably
> > worse off, and that is the authors of packages who
> > have chosen all lowercase names. ...
>
> Daniel Steffen has pointed out to me in the chat the
> source of my difficulty.  By stubbornly trying to
> solve this in Tcl only, I'm limited to the storage
> present in the current [package] implementation,
> which is a single table.  My so-called "real" and
> "phony" entries are forced into one table which
> causes the collisions and confusions I note above.
>
> Drop into C and the addition of a second table isn't
> hard.  It was even part of the TIP 339 Implementaion,
> if I followed that right.  Doing so can keep the
> existing table functioning undisturbed.

Yes. The reference implementation used a second hashtable.

The original table kept all the exact package names as keys.

The second table contained the case-folded form as keys.

Both tables shared the 'struct Package' however.

All packages with the same case-folded form are linked together, the first
in the list is the one used where the TIP specified 'first registered' ...


Note that using a pure-Tcl solution _does not_ prevent us from using a
second table. We can have one, it would just be an array variable.

--
	Andreas Kupries <and...@Ac...>
	Developer @ http://www.ActiveState.com
	Tel: +1 778-786-1122