[Maxima-discuss] regex packages, was: Reading data from header

[Robert D. <rob...@gm...>]

On 2015-10-18, Volker van Nek <vol...@gm...> wrote:

> In share/stringproc there is an alternative regex parser (portable regex
> parser by Dorai Sitaram) with an interface at Maxima level.
>
> It works nicely but it appears to be quite slow.

Thanks for the reminder, I had forgotten about that. I suspect that
sregex is strictly more powerful than nregex; I'd be surprised if nregex
were any faster, but that is not a key point. Also it's helpful that
there is a Maxima interface for sregex. Given all that, I'm in favor of
moving sregex into src and nuking nregex. There are a few calls to
nregex in src, but those would be easily replaced by sregex, I believe.

> When parsing RGBident with ibase:16 the parser wants hex-numbers
> starting with an alphabet-character to be zero-prefixed,

Yes, good point. I forgot about that too.

best,

Robert Dodier