* new major mode doubts
@ 2013-01-17 8:07 Luca Ferrari
2013-01-17 8:14 ` Luca Ferrari
` (3 more replies)
0 siblings, 4 replies; 6+ messages in thread
From: Luca Ferrari @ 2013-01-17 8:07 UTC (permalink / raw)
To: help-gnu-emacs
Hi all,
as an exercise I'm trying to implement my own major mode for a
programming language (dataflex, for what it matters). I'm following
the Mode Tutorial http://emacswiki.org/emacs/ModeTutorial and so far
I've the skeleton of the mode to work for me.
However, I've got a couple of doubts:
1) in the keyword list I specified a regexp for uppercase keywords as follows:
(defconst dataflex-font-lock-keywords-minimal
(list
'("\\<\\(BEGIN\\|E\\(?:LSE\\|ND\\)\\|FOR\\|IF\\|LOOP\\|MOVE\\|||T\\(?:HEN\\|O\\)\\|WHILE\\)\\>"
. font-lock-builtin-face )
'("\\('\\w*'\\)" . font-lock-variable-name-face) )
"Main (and minimal) highlighting for the Dataflex mode keywords" )
however my keywords could be camel case (therefore BEGIN, begin, bEgin
are all the same). Do I have to specify upper and lower case words
individually (avoiding the mess of the camel case) or is there a
smarter way to do it (e.g., checking the font lock against lowercased
words)?
2) the commenting is behaving in a strange manner: I've c++ comments,
therefore // .... and so I've defined the following:
(defun dataflex-comment-dwim (arg)
"Comment (in/out) a Dataflex piece of source code. It is based on comment-dwin
of newcomment.el"
(interactive "*P")
(require 'newcomment)
(let ( (comment-start "//") (comment-end "") )
(comment-dwim arg)))
but while it works for M-; comment, commenting out awhole region
causes each line to be included into a couple of // as
a line of code
becoming
// a line of code //
it seems as it comments out the region and for each line places an
empty comment at the end. Any idea on what I'm missing?
Thanks,
Luca
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: new major mode doubts
2013-01-17 8:07 new major mode doubts Luca Ferrari
@ 2013-01-17 8:14 ` Luca Ferrari
2013-01-17 14:53 ` Doug Lewan
` (2 subsequent siblings)
3 siblings, 0 replies; 6+ messages in thread
From: Luca Ferrari @ 2013-01-17 8:14 UTC (permalink / raw)
To: help-gnu-emacs
> 2) the commenting is behaving in a strange manner: I've c++ comments,
> therefore // .... and so I've defined the following:
> (defun dataflex-comment-dwim (arg)
> "Comment (in/out) a Dataflex piece of source code. It is based on comment-dwin
> of newcomment.el"
> (interactive "*P")
> (require 'newcomment)
> (let ( (comment-start "//") (comment-end "") )
> (comment-dwim arg)))
I found a problem with another assignment to comment-start and
comment-end that clashes with the above, so now this problem is fixed!
Luca
^ permalink raw reply [flat|nested] 6+ messages in thread* RE: new major mode doubts
2013-01-17 8:07 new major mode doubts Luca Ferrari
2013-01-17 8:14 ` Luca Ferrari
@ 2013-01-17 14:53 ` Doug Lewan
2013-01-17 15:52 ` Aurélien Aptel
2013-01-18 3:03 ` Dmitry Gutov
3 siblings, 0 replies; 6+ messages in thread
From: Doug Lewan @ 2013-01-17 14:53 UTC (permalink / raw)
To: Luca Ferrari, help-gnu-emacs
WRT Possible camel case: RE-matching in emacs is generally case-insensitive unless you make case-fold-search nil. So, you should get what you want for free.
,Douglas
Douglas Lewan
Shubert Ticketing
(201) 489-8600 ext 224
When I do good, I feel good. When I do bad, I feel bad and that's my religion. - Abraham Lincoln
> -----Original Message-----
> From: help-gnu-emacs-bounces+dougl=shubertticketing.com@gnu.org
> [mailto:help-gnu-emacs-bounces+dougl=shubertticketing.com@gnu.org] On
> Behalf Of Luca Ferrari
> Sent: Thursday, 2013 January 17 03:08
> To: help-gnu-emacs
> Subject: new major mode doubts
>
> Hi all,
> as an exercise I'm trying to implement my own major mode for a
> programming language (dataflex, for what it matters). I'm following
> the Mode Tutorial http://emacswiki.org/emacs/ModeTutorial and so far
> I've the skeleton of the mode to work for me.
> However, I've got a couple of doubts:
>
> 1) in the keyword list I specified a regexp for uppercase keywords as
> follows:
>
> (defconst dataflex-font-lock-keywords-minimal
> (list
>
> '("\\<\\(BEGIN\\|E\\(?:LSE\\|ND\\)\\|FOR\\|IF\\|LOOP\\|MOVE\\|||T\\(?:H
> EN\\|O\\)\\|WHILE\\)\\>"
> . font-lock-builtin-face )
> '("\\('\\w*'\\)" . font-lock-variable-name-face) )
> "Main (and minimal) highlighting for the Dataflex mode keywords" )
>
> however my keywords could be camel case (therefore BEGIN, begin, bEgin
> are all the same). Do I have to specify upper and lower case words
> individually (avoiding the mess of the camel case) or is there a
> smarter way to do it (e.g., checking the font lock against lowercased
> words)?
>
> 2) the commenting is behaving in a strange manner: I've c++ comments,
> therefore // .... and so I've defined the following:
> (defun dataflex-comment-dwim (arg)
> "Comment (in/out) a Dataflex piece of source code. It is based on
> comment-dwin
> of newcomment.el"
> (interactive "*P")
> (require 'newcomment)
> (let ( (comment-start "//") (comment-end "") )
> (comment-dwim arg)))
>
> but while it works for M-; comment, commenting out awhole region
> causes each line to be included into a couple of // as
>
> a line of code
>
> becoming
>
> // a line of code //
>
> it seems as it comments out the region and for each line places an
> empty comment at the end. Any idea on what I'm missing?
>
> Thanks,
> Luca
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: new major mode doubts
2013-01-17 8:07 new major mode doubts Luca Ferrari
2013-01-17 8:14 ` Luca Ferrari
2013-01-17 14:53 ` Doug Lewan
@ 2013-01-17 15:52 ` Aurélien Aptel
2013-01-18 3:03 ` Dmitry Gutov
3 siblings, 0 replies; 6+ messages in thread
From: Aurélien Aptel @ 2013-01-17 15:52 UTC (permalink / raw)
To: Luca Ferrari; +Cc: help-gnu-emacs
On Thu, Jan 17, 2013 at 9:07 AM, Luca Ferrari <fluca1978@infinito.it> wrote:
> (list
> '("\\<\\(BEGIN\\|E\\(?:LSE\\|ND\\)\\|FOR\\|IF\\|LOOP\\|MOVE\\|||T\\(?:HEN\\|O\\)\\|WHILE\\)\\>"
> . font-lock-builtin-face )
> '("\\('\\w*'\\)" . font-lock-variable-name-face) )
> "Main (and minimal) highlighting for the Dataflex mode keywords" )
I don't know much about writing modes but I think you should use
either `rx' or `regexp-opt` for this kind of regex.
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: new major mode doubts
2013-01-17 8:07 new major mode doubts Luca Ferrari
` (2 preceding siblings ...)
2013-01-17 15:52 ` Aurélien Aptel
@ 2013-01-18 3:03 ` Dmitry Gutov
2013-01-19 9:40 ` Luca Ferrari
3 siblings, 1 reply; 6+ messages in thread
From: Dmitry Gutov @ 2013-01-18 3:03 UTC (permalink / raw)
To: Luca Ferrari; +Cc: help-gnu-emacs
Luca Ferrari <fluca1978@infinito.it> writes:
> Hi all,
> as an exercise I'm trying to implement my own major mode for a
> programming language (dataflex, for what it matters). I'm following
> the Mode Tutorial http://emacswiki.org/emacs/ModeTutorial and so far
> I've the skeleton of the mode to work for me.
> However, I've got a couple of doubts:
>
> 1) in the keyword list I specified a regexp for uppercase keywords as follows:
>
> (defconst dataflex-font-lock-keywords-minimal
> (list
> '("\\<\\(BEGIN\\|E\\(?:LSE\\|ND\\)\\|FOR\\|IF\\|LOOP\\|MOVE\\|||T\\(?:HEN\\|O\\)\\|WHILE\\)\\>"
> . font-lock-builtin-face )
> '("\\('\\w*'\\)" . font-lock-variable-name-face) )
> "Main (and minimal) highlighting for the Dataflex mode keywords" )
>
> however my keywords could be camel case (therefore BEGIN, begin, bEgin
> are all the same). Do I have to specify upper and lower case words
> individually (avoiding the mess of the camel case) or is there a
> smarter way to do it (e.g., checking the font lock against lowercased
> words)?
See the `font-lock-defaults' doc. The third element is CASE-FOLD, and
this value is assigned to `font-lock-keywords-case-fold-search', which
also see.
^ permalink raw reply [flat|nested] 6+ messages in thread
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2013-01-17 8:07 new major mode doubts Luca Ferrari
2013-01-17 8:14 ` Luca Ferrari
2013-01-17 14:53 ` Doug Lewan
2013-01-17 15:52 ` Aurélien Aptel
2013-01-18 3:03 ` Dmitry Gutov
2013-01-19 9:40 ` Luca Ferrari
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