Including tex commands in a list

Including tex commands in a list

[steve-humphreys]

I am including a long list of greek characters (\alpha \beta \gamma) when
using texinfo, and want to inquire how to list them in a multiline expression.
Here I am using one line.

(defconst supinf-greek-keywords
  '(("\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>"
     (1 'typeface-greek-keywords)))
  "Rules to apply font-lock highlighting.")

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> I am including a long list of greek characters (\alpha \beta \gamma)
> when using texinfo, and want to inquire how to list them in a
> multiline expression.  Here I am using one line.
>
> (defconst supinf-greek-keywords
>   '(("\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>"
>      (1 'typeface-greek-keywords)))
>   "Rules to apply font-lock highlighting.")

You mean, in the expression?  Like

#+begin_src emacs-lisp
(defconst supinf-greek-keywords
  `((,(concat "\\\\\\<\\("
              (mapconcat #'identity (list "alpha" "beta" "gamma") "\\|")
              "\\)\\>")
             (1 'typeface-greek-keywords)))
  "Rules to apply font-lock highlighting.")
#+end_src

?

It would be best to use an appropriate `rx' expression instead of
`concat' as above if you know `rx' or want to get used to it.  Would
make the result even more readable.

Regards,

Michael.

Re: Including tex commands in a list

[steve-humphreys]

Never came across rx before.

Have used

(defconst crucible-mtksy-keywords
  `(;; Greek
    (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
              "Delta\\|epsilon\\|varepsilon\\|eta\\|"
              "gamma\\|Gamma\\|iota\\|kappa \\|"
              "lambda\\|Lambda\\|mu\\|nu\\|"
              "omega\\|Omega\\|phi\\|varphi\\|"
              "Phi\\|pi\\|varpi\\|Pi\\|"
              "psi\\|Psi\\|rho\\|varrho\\|"
              "sigma\\|varsigma\\|Sigma\\|tau\\|"
              "theta\\|vartheta\\|Theta\\|upsilon\\|"
              "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
     (0 'crucible-mtksy-tfc)) ;

It would help if I had an example of using "rx" for this.

> Sent: Thursday, January 28, 2021 at 11:01 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > I am including a long list of greek characters (\alpha \beta \gamma)
> > when using texinfo, and want to inquire how to list them in a
> > multiline expression.  Here I am using one line.
> >
> > (defconst supinf-greek-keywords
> >   '(("\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>"
> >      (1 'typeface-greek-keywords)))
> >   "Rules to apply font-lock highlighting.")
>
> You mean, in the expression?  Like
>
> #+begin_src emacs-lisp
> (defconst supinf-greek-keywords
>   `((,(concat "\\\\\\<\\("
>               (mapconcat #'identity (list "alpha" "beta" "gamma") "\\|")
>               "\\)\\>")
>              (1 'typeface-greek-keywords)))
>   "Rules to apply font-lock highlighting.")
> #+end_src
>
> ?
>
> It would be best to use an appropriate `rx' expression instead of
> `concat' as above if you know `rx' or want to get used to it.  Would
> make the result even more readable.
>
> Regards,
>
> Michael.
>
>
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> (defconst crucible-mtksy-keywords
>   `(;; Greek
>     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
>               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
>               "gamma\\|Gamma\\|iota\\|kappa \\|"
>               "lambda\\|Lambda\\|mu\\|nu\\|"
>               "omega\\|Omega\\|phi\\|varphi\\|"
>               "Phi\\|pi\\|varpi\\|Pi\\|"
>               "psi\\|Psi\\|rho\\|varrho\\|"
>               "sigma\\|varsigma\\|Sigma\\|tau\\|"
>               "theta\\|vartheta\\|Theta\\|upsilon\\|"
>               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
>      (0 'crucible-mtksy-tfc)) ;
>
> It would help if I had an example of using "rx" for this.

That would look like this (you want to add the missing greek letter
names):

(defconst crucible-mtksy-keywords
  `(;; Greek
    (,(rx "\\" word-start
          (or "alpha" "beta") ;add the other letters here
          word-end)
     (0 'crucible-mtksy-tfc))))

The result will be a slightly optimized regexp (equivalent to yours of
course).

If you want to go that way, I think it would also be possible to avoid
the repetition of uncapitalized followed by a capitalized letter name.

HTH,

Michael.

Re: Including tex commands in a list

[steve-humphreys]

I am using font lock to highlight keywords in a minor mode.
Have changed from using "concat" to using "rx" as you suggested.
However it does not seem equivalent.

(defconst crucible-mtksy-keywords
  `(;; Greek
    (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
              "Delta\\|epsilon\\|varepsilon\\|eta\\|"
              "gamma\\|Gamma\\|iota\\|kappa \\|"
              "lambda\\|Lambda\\|mu\\|nu\\|"
              "omega\\|Omega\\|phi\\|varphi\\|"
              "Phi\\|pi\\|varpi\\|Pi\\|"
              "psi\\|Psi\\|rho\\|varrho\\|"
              "sigma\\|varsigma\\|Sigma\\|tau\\|"
              "theta\\|vartheta\\|Theta\\|upsilon\\|"
              "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
     (0 'crucible-mtksy-tfc)))
 "Fontification for letters and symbols.")

(defun crucible-mtksy-tfc ()
  "Font-lock setup for mathematical symbols."
  (font-lock-flush (point-min) (point-max))
  (if crucible-mode
      (progn
        (font-lock-add-keywords nil crucible-mtksy-keywords t)
        (font-lock-add-keywords nil crucible-supinf-font-lock t))
    (font-lock-remove-keywords nil crucible-mtksy-keywords)
    (crucible-supinf-disable (point-min) (point-max)))
  (font-lock-flush (point-min) (point-max)))


> Sent: Friday, January 29, 2021 at 2:24 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: steve-humphreys@gmx.com
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > (defconst crucible-mtksy-keywords
> >   `(;; Greek
> >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> >               "lambda\\|Lambda\\|mu\\|nu\\|"
> >               "omega\\|Omega\\|phi\\|varphi\\|"
> >               "Phi\\|pi\\|varpi\\|Pi\\|"
> >               "psi\\|Psi\\|rho\\|varrho\\|"
> >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> >      (0 'crucible-mtksy-tfc)) ;
> >
> > It would help if I had an example of using "rx" for this.
>
> That would look like this (you want to add the missing greek letter
> names):
>
> (defconst crucible-mtksy-keywords
>   `(;; Greek
>     (,(rx "\\" word-start
>           (or "alpha" "beta") ;add the other letters here
>           word-end)
>      (0 'crucible-mtksy-tfc))))
>
> The result will be a slightly optimized regexp (equivalent to yours of
> course).
>
> If you want to go that way, I think it would also be possible to avoid
> the repetition of uncapitalized followed by a capitalized letter name.
>
> HTH,
>
> Michael.
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> I am using font lock to highlight keywords in a minor mode.
> Have changed from using "concat" to using "rx" as you suggested.
> However it does not seem equivalent.
>
> (defconst crucible-mtksy-keywords
>   `(;; Greek
>     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
>               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
>               "gamma\\|Gamma\\|iota\\|kappa \\|"
>               "lambda\\|Lambda\\|mu\\|nu\\|"
>               "omega\\|Omega\\|phi\\|varphi\\|"
>               "Phi\\|pi\\|varpi\\|Pi\\|"
>               "psi\\|Psi\\|rho\\|varrho\\|"
>               "sigma\\|varsigma\\|Sigma\\|tau\\|"
>               "theta\\|vartheta\\|Theta\\|upsilon\\|"
>               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
>      (0 'crucible-mtksy-tfc)))
>  "Fontification for letters and symbols.")

How does your rx version look like?

Michael.

Re: Including tex commands in a list

[steve-humphreys]

Had made it as you suggested, but I think there has to be some changes
that have to be done in the regexp.

Have used

(defconst crucible-mtksy-keywords
`(;; Greek
   (,(rx "\\" word-start
      (or "alpha" "beta") ;add the other letters here
      word-end)
   (0 'crucible-mtksy-tfc))) )

In the expression (1 'crucible-mtksy-tfc), the "1" is an option to not
highlight the starting "\".



> Sent: Friday, January 29, 2021 at 9:19 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > I am using font lock to highlight keywords in a minor mode.
> > Have changed from using "concat" to using "rx" as you suggested.
> > However it does not seem equivalent.
> >
> > (defconst crucible-mtksy-keywords
> >   `(;; Greek
> >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> >               "lambda\\|Lambda\\|mu\\|nu\\|"
> >               "omega\\|Omega\\|phi\\|varphi\\|"
> >               "Phi\\|pi\\|varpi\\|Pi\\|"
> >               "psi\\|Psi\\|rho\\|varrho\\|"
> >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> >      (0 'crucible-mtksy-tfc)))
> >  "Fontification for letters and symbols.")
>
> How does your rx version look like?
>
> Michael.
>
>
>

Re: Including tex commands in a list

[steve-humphreys]

I know that the command

(rx (or "alpha" "beta"))

produces the generated pattern

"\\(?:alpha\\|beta\\)"





> Sent: Friday, January 29, 2021 at 9:19 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > I am using font lock to highlight keywords in a minor mode.
> > Have changed from using "concat" to using "rx" as you suggested.
> > However it does not seem equivalent.
> >
> > (defconst crucible-mtksy-keywords
> >   `(;; Greek
> >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> >               "lambda\\|Lambda\\|mu\\|nu\\|"
> >               "omega\\|Omega\\|phi\\|varphi\\|"
> >               "Phi\\|pi\\|varpi\\|Pi\\|"
> >               "psi\\|Psi\\|rho\\|varrho\\|"
> >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> >      (0 'crucible-mtksy-tfc)))
> >  "Fontification for letters and symbols.")
>
> How does your rx version look like?
>
> Michael.
>
>
>

Re: Including tex commands in a list

[Christopher Dimech]

You can try to use

(require 'rx)
(rx "\\" "alpha" (or "beta" "gamma") "theta")




> Sent: Friday, January 29, 2021 at 10:12 AM
> From: steve-humphreys@gmx.com
> To: "Michael Heerdegen" <michael_heerdegen@web.de>
> Cc: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> I know that the command
>
> (rx (or "alpha" "beta"))
>
> produces the generated pattern
>
> "\\(?:alpha\\|beta\\)"
>
>
>
>
>
> > Sent: Friday, January 29, 2021 at 9:19 AM
> > From: "Michael Heerdegen" <michael_heerdegen@web.de>
> > To: help-gnu-emacs@gnu.org
> > Subject: Re: Including tex commands in a list
> >
> > steve-humphreys@gmx.com writes:
> >
> > > I am using font lock to highlight keywords in a minor mode.
> > > Have changed from using "concat" to using "rx" as you suggested.
> > > However it does not seem equivalent.
> > >
> > > (defconst crucible-mtksy-keywords
> > >   `(;; Greek
> > >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> > >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> > >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> > >               "lambda\\|Lambda\\|mu\\|nu\\|"
> > >               "omega\\|Omega\\|phi\\|varphi\\|"
> > >               "Phi\\|pi\\|varpi\\|Pi\\|"
> > >               "psi\\|Psi\\|rho\\|varrho\\|"
> > >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> > >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> > >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> > >      (0 'crucible-mtksy-tfc)))
> > >  "Fontification for letters and symbols.")
> >
> > How does your rx version look like?
> >
> > Michael.
> >
> >
> >
>
>

Re: Including tex commands in a list

[steve-humphreys]

As you pointed out, I misunderstood how to use rx.

However when I applied the change, the keywords are not being
highlighted at all.

  `(;; Greek
    (, (rx "\\" "alpha" (or "beta" "chi") "delta")
     (1 'crucible-mtksy-tfc))
    (,(concat "\\\\\\<\\(Delta\\|epsilon\\|varepsilon\\|eta\\|"
              "gamma\\|Gamma\\|iota\\|kappa \\|"
              "lambda\\|Lambda\\|mu\\|nu\\|"
              "omega\\|Omega\\|phi\\|varphi\\|"
              "Phi\\|pi\\|varpi\\|Pi\\|"
              "psi\\|Psi\\|rho\\|varrho\\|"
              "sigma\\|varsigma\\|Sigma\\|tau\\|"
              "theta\\|vartheta\\|Theta\\|upsilon\\|"
              "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
     (0 'crucible-mtksy-tfc))


> Sent: Friday, January 29, 2021 at 10:17 AM
> From: "Christopher Dimech" <dimech@gmx.com>
> To: steve-humphreys@gmx.com
> Cc: "Michael Heerdegen" <michael_heerdegen@web.de>, help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> You can try to use
>
> (require 'rx)
> (rx "\\" "alpha" (or "beta" "gamma") "theta")
>
>
>
>
> > Sent: Friday, January 29, 2021 at 10:12 AM
> > From: steve-humphreys@gmx.com
> > To: "Michael Heerdegen" <michael_heerdegen@web.de>
> > Cc: help-gnu-emacs@gnu.org
> > Subject: Re: Including tex commands in a list
> >
> > I know that the command
> >
> > (rx (or "alpha" "beta"))
> >
> > produces the generated pattern
> >
> > "\\(?:alpha\\|beta\\)"
> >
> >
> >
> >
> >
> > > Sent: Friday, January 29, 2021 at 9:19 AM
> > > From: "Michael Heerdegen" <michael_heerdegen@web.de>
> > > To: help-gnu-emacs@gnu.org
> > > Subject: Re: Including tex commands in a list
> > >
> > > steve-humphreys@gmx.com writes:
> > >
> > > > I am using font lock to highlight keywords in a minor mode.
> > > > Have changed from using "concat" to using "rx" as you suggested.
> > > > However it does not seem equivalent.
> > > >
> > > > (defconst crucible-mtksy-keywords
> > > >   `(;; Greek
> > > >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> > > >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> > > >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> > > >               "lambda\\|Lambda\\|mu\\|nu\\|"
> > > >               "omega\\|Omega\\|phi\\|varphi\\|"
> > > >               "Phi\\|pi\\|varpi\\|Pi\\|"
> > > >               "psi\\|Psi\\|rho\\|varrho\\|"
> > > >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> > > >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> > > >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> > > >      (0 'crucible-mtksy-tfc)))
> > > >  "Fontification for letters and symbols.")
> > >
> > > How does your rx version look like?
> > >
> > > Michael.
> > >
> > >
> > >
> >
> >
>
>

Re: Including tex commands in a list

[steve-humphreys]

Have also tried to do the following, but it still has remained a problem.

(defconst crucible-mtksy-keywords
  `(;; Greek
    (,(concat "\\\\\\<"
	      (rx "\\" "alpha" (or "beta" "chi") "delta")
		 "\\>")
     (0 'crucible-mtksy-tfc)) ; NOTE: Use 0 instead of 1 to also highlight the \
    (,(concat "\\\\\\<\\(Delta\\|epsilon\\|varepsilon\\|eta\\|"
              "gamma\\|Gamma\\|iota\\|kappa \\|"
              "lambda\\|Lambda\\|mu\\|nu\\|"
              "omega\\|Omega\\|phi\\|varphi\\|"
              "Phi\\|pi\\|varpi\\|Pi\\|"
              "psi\\|Psi\\|rho\\|varrho\\|"
              "sigma\\|varsigma\\|Sigma\\|tau\\|"
              "theta\\|vartheta\\|Theta\\|upsilon\\|"
              "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
     (0 'crucible-mtksy-tfc))




> Sent: Friday, January 29, 2021 at 10:26 AM
> From: steve-humphreys@gmx.com
> To: "Christopher Dimech" <dimech@gmx.com>
> Cc: "Michael Heerdegen" <michael_heerdegen@web.de>, help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> As you pointed out, I misunderstood how to use rx.
>
> However when I applied the change, the keywords are not being
> highlighted at all.
>
>   `(;; Greek
>     (, (rx "\\" "alpha" (or "beta" "chi") "delta")
>      (1 'crucible-mtksy-tfc))
>     (,(concat "\\\\\\<\\(Delta\\|epsilon\\|varepsilon\\|eta\\|"
>               "gamma\\|Gamma\\|iota\\|kappa \\|"
>               "lambda\\|Lambda\\|mu\\|nu\\|"
>               "omega\\|Omega\\|phi\\|varphi\\|"
>               "Phi\\|pi\\|varpi\\|Pi\\|"
>               "psi\\|Psi\\|rho\\|varrho\\|"
>               "sigma\\|varsigma\\|Sigma\\|tau\\|"
>               "theta\\|vartheta\\|Theta\\|upsilon\\|"
>               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
>      (0 'crucible-mtksy-tfc))
>
>
> > Sent: Friday, January 29, 2021 at 10:17 AM
> > From: "Christopher Dimech" <dimech@gmx.com>
> > To: steve-humphreys@gmx.com
> > Cc: "Michael Heerdegen" <michael_heerdegen@web.de>, help-gnu-emacs@gnu.org
> > Subject: Re: Including tex commands in a list
> >
> > You can try to use
> >
> > (require 'rx)
> > (rx "\\" "alpha" (or "beta" "gamma") "theta")
> >
> >
> >
> >
> > > Sent: Friday, January 29, 2021 at 10:12 AM
> > > From: steve-humphreys@gmx.com
> > > To: "Michael Heerdegen" <michael_heerdegen@web.de>
> > > Cc: help-gnu-emacs@gnu.org
> > > Subject: Re: Including tex commands in a list
> > >
> > > I know that the command
> > >
> > > (rx (or "alpha" "beta"))
> > >
> > > produces the generated pattern
> > >
> > > "\\(?:alpha\\|beta\\)"
> > >
> > >
> > >
> > >
> > >
> > > > Sent: Friday, January 29, 2021 at 9:19 AM
> > > > From: "Michael Heerdegen" <michael_heerdegen@web.de>
> > > > To: help-gnu-emacs@gnu.org
> > > > Subject: Re: Including tex commands in a list
> > > >
> > > > steve-humphreys@gmx.com writes:
> > > >
> > > > > I am using font lock to highlight keywords in a minor mode.
> > > > > Have changed from using "concat" to using "rx" as you suggested.
> > > > > However it does not seem equivalent.
> > > > >
> > > > > (defconst crucible-mtksy-keywords
> > > > >   `(;; Greek
> > > > >     (,(concat "\\\\\\<\\(alpha\\|beta\\|chi\\|delta\\|"
> > > > >               "Delta\\|epsilon\\|varepsilon\\|eta\\|"
> > > > >               "gamma\\|Gamma\\|iota\\|kappa \\|"
> > > > >               "lambda\\|Lambda\\|mu\\|nu\\|"
> > > > >               "omega\\|Omega\\|phi\\|varphi\\|"
> > > > >               "Phi\\|pi\\|varpi\\|Pi\\|"
> > > > >               "psi\\|Psi\\|rho\\|varrho\\|"
> > > > >               "sigma\\|varsigma\\|Sigma\\|tau\\|"
> > > > >               "theta\\|vartheta\\|Theta\\|upsilon\\|"
> > > > >               "Upsilon\\|xi\\|Xi\\|zeta\\)\\>")
> > > > >      (0 'crucible-mtksy-tfc)))
> > > > >  "Fontification for letters and symbols.")
> > > >
> > > > How does your rx version look like?
> > > >
> > > > Michael.
> > > >
> > > >
> > > >
> > >
> > >
> >
> >
>
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> Have also tried to do the following, but it still has remained a problem.
>
> (defconst crucible-mtksy-keywords
>   `(;; Greek
>     (,(concat "\\\\\\<"
> 	      (rx "\\" "alpha" (or "beta" "chi") "delta")

That would match something like \alphabetadelta.  I guess that's not
what you want.

If you want to refer to a submatch, e.g. to what is matched by the `or'
subexpression, use an explicit `group'.

Michael.

Re: Including tex commands in a list

[steve-humphreys]

> Sent: Saturday, January 30, 2021 at 12:05 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > Have also tried to do the following, but it still has remained a problem.
> >
> > (defconst crucible-mtksy-keywords
> >   `(;; Greek
> >     (,(concat "\\\\\\<"
> > 	      (rx "\\" "alpha" (or "beta" "chi") "delta")
>
> That would match something like \alphabetadelta.  I guess that's not
> what you want.
>
> If you want to refer to a submatch, e.g. to what is matched by the `or'
> subexpression, use an explicit `group'.

Should I still try to use "rx" for my situation?

> Michael.
>
>
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> Should I still try to use "rx" for my situation?

I would do it, it makes the regexp better readable.  That's why I
mentioned it.  Of course it takes a bit of extra time to learn the
syntax.  It's totally ok to go without `rx'.

Regards,

Michael.

Re: Including tex commands in a list

[steve-humphreys]

I have not found enough information on how to use "rx".

> Sent: Saturday, January 30, 2021 at 2:00 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > Should I still try to use "rx" for my situation?
>
> I would do it, it makes the regexp better readable.  That's why I
> mentioned it.  Of course it takes a bit of extra time to learn the
> syntax.  It's totally ok to go without `rx'.
>
> Regards,
>
> Michael.
>
>
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> I have not found enough information on how to use "rx".

In my Emacs version it's described in the manual:

  (info "(elisp) Rx Notation")

Do you have that? AFAIR that chapter had been added to Emacs not that
long ago.

Michael.

Re: Including tex commands in a list

[steve-humphreys]

I am using GNU Emacs 25.2.2 and would not give me any information.




> Sent: Saturday, January 30, 2021 at 8:56 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > I have not found enough information on how to use "rx".
>
> In my Emacs version it's described in the manual:
>
>   (info "(elisp) Rx Notation")
>
> Do you have that? AFAIR that chapter had been added to Emacs not that
> long ago.
>
> Michael.
>
>
>

Re: Including tex commands in a list

[steve-humphreys]

Have looked at the Emacs Lisp Manual from the Online Emacs Documentation.
I now understand why you used word-start and word-end, but still need
some serious help to get an equivalent expression for my regexp.




> Sent: Saturday, January 30, 2021 at 8:56 AM
> From: "Michael Heerdegen" <michael_heerdegen@web.de>
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> steve-humphreys@gmx.com writes:
>
> > I have not found enough information on how to use "rx".
>
> In my Emacs version it's described in the manual:
>
>   (info "(elisp) Rx Notation")
>
> Do you have that? AFAIR that chapter had been added to Emacs not that
> long ago.
>
> Michael.
>
>
>

Re: Including tex commands in a list

[Michael Heerdegen]

steve-humphreys@gmx.com writes:

> I now understand why you used word-start and word-end, but still need
> some serious help to get an equivalent expression for my regexp.

And what are your questions?

Michael.

Re: Including tex commands in a list

[tomas]

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On Fri, Jan 29, 2021 at 09:46:57PM +0100, steve-humphreys@gmx.com wrote:
> 
> I have not found enough information on how to use "rx".

The Emacs Lisp manual has a pretty extensive documentation
on it:

   34.3.3 The ‘rx’ Structured Regexp Notation

Alternatively, in the Interwebs here [1].

Cheers

[1] https://www.gnu.org/software/emacs/manual/html_node/elisp/Rx-Notation.html
 

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Re: Including tex commands in a list

[steve-humphreys]

I wantt to make the equivalent to the following, but still find
difficulty doing it.

(,(concat "\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>")




> Sent: Saturday, January 30, 2021 at 9:45 AM
> From: tomas@tuxteam.de
> To: help-gnu-emacs@gnu.org
> Subject: Re: Including tex commands in a list
>
> On Fri, Jan 29, 2021 at 09:46:57PM +0100, steve-humphreys@gmx.com wrote:
> > 
> > I have not found enough information on how to use "rx".
> 
> The Emacs Lisp manual has a pretty extensive documentation
> on it:
> 
>    34.3.3 The ‘rx’ Structured Regexp Notation
> 
> Alternatively, in the Interwebs here [1].
> 
> Cheers
> 
> [1] https://www.gnu.org/software/emacs/manual/html_node/elisp/Rx-Notation.html
>  
>

Re: Including tex commands in a list

[tomas]

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On Fri, Jan 29, 2021 at 10:52:39PM +0100, steve-humphreys@gmx.com wrote:
> I wantt to make the equivalent to the following, but still find
> difficulty doing it.
> 
> (,(concat "\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>")

There's something missing up there. I'll try with just

  "\\\\\\<\\(alpha\\|beta\\|gamma\\)\\>"

The first four backslashes translate to one escaped backslash:

  (rx "\\" ...)

(two backslashes, because of Lisp string literal syntax)

Now comes a word start ("word-start" or "bow"; I'll go with the
more readable "word-start"):

  (rx "\\" word-start ...)

Next is a group, followed by a word-end:

  (rx "\\" word-start (group ...) word-end)

Within the group, there is an alternative:

  (rx "\\"
    word-start
      (group
        (or ...))
    word-end)

Now the alternative's content:
   
  (rx "\\"
    word-start
      (group
        (or "alpha" "beta" "gamma"))
    word-end)

You can check that by evaluating it in a Emacs Lisp buffer (e.g.
this *scratch* buffer Emacs comes up at start): put point after
the whole expression and hit C-x e. You get:

  "\\\\\\<\\(\\(?:\\(?:alph\\|bet\\|gamm\\)a\\)\\)\\>"

There are some spurious non-capturing groups (?: ...), and it
even factored out the trailing -a from "alpha"... etc., but
should be equivalent.

Does it help?

Cheers
 - t


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