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Re: rx.el sexp regexp syntax
From: |
Robert Pluim |
Subject: |
Re: rx.el sexp regexp syntax |
Date: |
Thu, 31 May 2018 10:57:03 +0200 |
Richard Stallman <address@hidden> writes:
> [[[ To any NSA and FBI agents reading my email: please consider ]]]
> [[[ whether defending the US Constitution against all enemies, ]]]
> [[[ foreign or domestic, requires you to follow Snowden's example. ]]]
>
> > > The clearer representation of structure is not the same thing as
> > > verbosity. rx does both, but they are not the same thing. We could
> > > envision making the structure more or less equally clear without
> > > making the patterns so long.
>
> > It's not clear to me how you'd do that.
>
> I don't see a specific way either, but someone might come up with a way.
> I'm suggesting this as a topic of investigation.
>
> > and frankly being able to write 'bos' rather than remembering '\\`' or
> > 'symbol-start' rather than '\\_<' is a net win in my eyes.
>
> I agree, as regards those. On the other hand, those strings might not
> be the best. Maybe 'text<' and 'sym<' would be better. We could
> have a series of keywords, XYZ< and XYZ>, which would be as systematic
> as now or more so, and shorter too.
What we have now is [be]o[lstw], which covers lines, strings, and
words. The only thing missing is symbols, which is easily fixed like
so [1]:
diff --git i/lisp/emacs-lisp/rx.el w/lisp/emacs-lisp/rx.el
index 8059bf2a6e..833321cd7b 100644
--- i/lisp/emacs-lisp/rx.el
+++ w/lisp/emacs-lisp/rx.el
@@ -170,7 +170,9 @@ rx-constituents
(word-boundary . "\\b")
(not-word-boundary . "\\B") ; sregex
(symbol-start . "\\_<")
+ (boS . "\\_<")
(symbol-end . "\\_>")
+ (eoS . "\\_>")
(syntax . (rx-syntax 1 1))
(not-syntax . (rx-not-syntax 1 1)) ; sregex
(category . (rx-category 1 1 rx-check-category))
Footnotes:
[1] Iʼm only half joking
- Re: rx.el sexp regexp syntax, (continued)
- Re: rx.el sexp regexp syntax, Eric Abrahamsen, 2018/05/25
- Re: rx.el sexp regexp syntax, Stefan Monnier, 2018/05/27
- Re: rx.el sexp regexp syntax, Pierre Neidhardt, 2018/05/28
- Re: rx.el sexp regexp syntax, Stefan Monnier, 2018/05/28
- Re: rx.el sexp regexp syntax, Richard Stallman, 2018/05/28
- Re: rx.el sexp regexp syntax, Robert Pluim, 2018/05/29
- Re: rx.el sexp regexp syntax, Philipp Stephani, 2018/05/29
- Re: rx.el sexp regexp syntax, Richard Stallman, 2018/05/29
- Re: rx.el sexp regexp syntax, Robert Pluim, 2018/05/30
- Re: rx.el sexp regexp syntax, Richard Stallman, 2018/05/30
- Re: rx.el sexp regexp syntax,
Robert Pluim <=
- Re: rx.el sexp regexp syntax, Clément Pit-Claudel, 2018/05/31
- Re: rx.el sexp regexp syntax, Stefan Monnier, 2018/05/31
- RE: rx.el sexp regexp syntax, Drew Adams, 2018/05/31
- Re: rx.el sexp regexp syntax, João Távora, 2018/05/31
- Re: rx.el sexp regexp syntax, Robert Pluim, 2018/05/31
- Re: rx.el sexp regexp syntax, Basil L. Contovounesios, 2018/05/31
- Re: rx.el sexp regexp syntax, Basil L. Contovounesios, 2018/05/31
- Re: rx.el sexp regexp syntax, João Távora, 2018/05/31
- Re: rx.el sexp regexp syntax (WAS: Off Topic), Alan Mackenzie, 2018/05/25
- Re: rx.el sexp regexp syntax, Michael Heerdegen, 2018/05/25