Re: [PATCH] lisp/org-clock.el (org-clock-sum): Rewrite regex using rx

[Ihor Radchenko <yantar92@posteo.net>]

Morgan Smith <Morgan.J.Smith@outlook.com> writes:

> See two attached patches.  All tests pass on my computer.
>
> Every once in a while I feel obligated to go back to org-clock-sum to
> try and optimize it.  I have a file with 8 clocktables in it and it
> takes forever to update.  This time I decided instead of trying to
> optimize, I'm just going to try and understand.
>
> The regex has been altered slightly.
>
> 1. Instead of using "[ \t]", I decided to use [[:blank:]].  No real
> reason.  I just think it's easier to read and maybe slightly more
> correct?
>
> 2. For the timestamps, instead of ".*?" (using a non-greedy ".*") I
> decided to use "[^]]*" (accept everything except "]").  I did this simply
> because I'm not used to using non-greedy regex's.  Maybe this way
> performs better?  I didn't test that.
>
> 3. I used the variable `org-outline-regexp' but that doesn't actually
> change the regex.

Thanks for the patch!
I think that a better approach would be re-using the parser constant
`org-element-clock-line-re'. 

> * testing/lisp/test-org-clock.el (test-org-clock/clocktable/insert):
> Add a clock time that does not include timestamps.
> ...
> -
> -      (goto-line 2)
> +      (insert (org-test-clock-create-clock ". 1:00" ". 2:00")
> +              "CLOCK: => 1:00\n")

This is not a valid clock format. Matching such lines is a bug.
See https://list.orgmode.org/orgmode/87wpkkhafc.fsf@saiph.selenimh/

-- 
Ihor Radchenko // yantar92,
Org mode contributor,
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