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bug#26338: 26.0.50; Collect all matches for REGEXP in current buffer


From: Philipp Stephani
Subject: bug#26338: 26.0.50; Collect all matches for REGEXP in current buffer
Date: Sat, 22 Apr 2017 19:36:57 +0000



<address@hidden> schrieb am Sa., 8. Apr. 2017 um 17:37 Uhr:
Philipp Stephani <address@hidden> writes:

>>> - Coupling of unrelated entities is always an antipattern.
>>> - For N iterables and M looping constructs, you need to implement
>>> N*M integrations.
>
> Yes, I don't care about Common Lisp. The iter-by clause is less of a
> problem than 'buffers' etc. because it's not a one-off that couples a
> looping construct with some random semantics.

It's sort of related to Drew's concerns in that Emacs deals with the N*M
problem by setting M=1, hence why only cl-loop gets the pressure to add
more enhancments.

There are some practical problem with iter-defun though: it has several
bugs on which there doesn't seem to be any movement[1][2][3],

That's unfortunate, because it's a really well-designed library. Stefan has apparently resumed work on these issues (e.g commit 89898e43c7ceef28bb3c2116b4d8a3ec96d9c8da), so let's hope they will be fixed eventually.
 
it's
reported to be slow[4], and cl-loop's iter-by keyword is not documented
at all (that could be easily fixed, at least).  I wonder if streams[5]
is a better direction. 

Maybe, though I'd be hesitant to add yet another library for the same thing to Emacs, and I much prefer generator.el's interface.

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