Ektending rainbow-delimiters to colour {}

Ektending rainbow-delimiters to colour {}

[carlmarcos--- via Users list for the GNU Emacs text editor]

I am using rainbow-delimiters and want to extend it to colour {} in addition to ().  Is there an easy way to do it?  rainbow-delimiters--propertize is the main function for dynamic highlighting.

The line

(while (> end (progn (skip-syntax-forward "^()" end)

seems to be the part searching for ().

Re: Ektending rainbow-delimiters to colour {}

[tomas]

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On Tue, Jul 19, 2022 at 09:29:31AM +0200, carlmarcos--- via Users list for the GNU Emacs text editor wrote:
> 
> I am using rainbow-delimiters and want to extend it to colour {} in addition to ().  Is there an easy way to do it?  rainbow-delimiters--propertize is the main function for dynamic highlighting.
> 
> The line
> 
> (while (> end (progn (skip-syntax-forward "^()" end)
> 
> seems to be the part searching for ().

Look up the documentation for `skip-syntax-forward'. Then read on
syntax classes. Then, be enlightened :)

Cheers
-- 
t

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Re: Ektending rainbow-delimiters to colour {}

[carlmarcos--- via Users list for the GNU Emacs text editor]

Jul 19, 2022, 07:34 by tomas@tuxteam.de:

> On Tue, Jul 19, 2022 at 09:29:31AM +0200, carlmarcos--- via Users list for the GNU Emacs text editor wrote:
>
>>
>> I am using rainbow-delimiters and want to extend it to colour {} in addition to ().  Is there an easy way to do it?  rainbow-delimiters--propertize is the main function for dynamic highlighting.
>>
>> The line
>>
>> (while (> end (progn (skip-syntax-forward "^()" end)
>>
>> seems to be the part searching for ().
>>
>
> Look up the documentation for `skip-syntax-forward'. Then read on
> syntax classes. Then, be enlightened :)
>
From the help for skip-syntax-forward, if syntax starts with ^, skip characters whose syntax is not in syntax.

Re: Ektending rainbow-delimiters to colour {}

[tomas]

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On Tue, Jul 19, 2022 at 10:21:15AM +0200, carlmarcos@tutanota.com wrote:
> 
> Jul 19, 2022, 07:34 by tomas@tuxteam.de:

[...]

> > Look up the documentation for `skip-syntax-forward'. Then read on
> > syntax classes. Then, be enlightened :)
> >
> >From the help for skip-syntax-forward, if syntax starts with ^, skip characters whose syntax is not in syntax.

Nearly.

Dig deeper: what could that "syntax" thing mean? Did you read on syntax
classes in the manual? Does this answer your question?

Cheers
-- 
t

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Re: Ektending rainbow-delimiters to colour {}

[carlmarcos--- via Users list for the GNU Emacs text editor]

Jul 19, 2022, 08:39 by tomas@tuxteam.de:

> On Tue, Jul 19, 2022 at 10:21:15AM +0200, carlmarcos@tutanota.com wrote:
>
>>
>> Jul 19, 2022, 07:34 by tomas@tuxteam.de:
>>
>
> [...]
>
>> > Look up the documentation for `skip-syntax-forward'. Then read on
>> > syntax classes. Then, be enlightened :)
>> >
>> >From the help for skip-syntax-forward, if syntax starts with ^, skip characters whose syntax is not in syntax.
>>
>
> Nearly.
>
> Dig deeper: what could that "syntax" thing mean? Did you read on syntax
> classes in the manual? Does this answer your question?
>
I have read.  Looks as if emacs has internal functionality to determine start and end of elisp
expressions, which rainbow-delimiters relies of.  It does actually also follow [], not so for {}.    

Re: Ektending rainbow-delimiters to colour {}

[tomas]

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On Tue, Jul 19, 2022 at 11:31:48AM +0200, carlmarcos@tutanota.com wrote:
> 
> Jul 19, 2022, 08:39 by tomas@tuxteam.de:
> 
> > On Tue, Jul 19, 2022 at 10:21:15AM +0200, carlmarcos@tutanota.com wrote:
> >
> >>
> >> Jul 19, 2022, 07:34 by tomas@tuxteam.de:
> >>
> >
> > [...]
> >
> >> > Look up the documentation for `skip-syntax-forward'. Then read on
> >> > syntax classes. Then, be enlightened :)
> >> >
> >> >From the help for skip-syntax-forward, if syntax starts with ^, skip characters whose syntax is not in syntax.
> >>
> >
> > Nearly.
> >
> > Dig deeper: what could that "syntax" thing mean? Did you read on syntax
> > classes in the manual? Does this answer your question?
> >
> I have read.  Looks as if emacs has internal functionality to determine start and end of elisp
> expressions, which rainbow-delimiters relies of.  It does actually also follow [], not so for {}.    

Read again:

  The “syntax class” of a character describes its syntactic role.  Each
  syntax table specifies the syntax class of each character.  There is no
  necessary relationship between the class of a character in one syntax
  table and its class in any other table.

So whether { resp } have the syntax class symbolised by ( resp. ) depends
on how you set up your syntax class table. Major modes set that up to match
the expectations of the language in question. In theory you could even set
# . up as opening and closing parentheses whenever it makes sense.

The answer is: Emacs _already does_ what you want.

Cheers
-- 
t

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Re: Ektending rainbow-delimiters to colour {}

[carlmarcos--- via Users list for the GNU Emacs text editor]

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Jul 19, 2022, 09:45 by tomas@tuxteam.de:

> On Tue, Jul 19, 2022 at 11:31:48AM +0200, carlmarcos@tutanota.com wrote:
>
>>
>> Jul 19, 2022, 08:39 by tomas@tuxteam.de:
>>
>> > On Tue, Jul 19, 2022 at 10:21:15AM +0200, carlmarcos@tutanota.com wrote:
>> >
>> >>
>> >> Jul 19, 2022, 07:34 by tomas@tuxteam.de:
>> >>
>> >
>> > [...]
>> >
>> >> > Look up the documentation for `skip-syntax-forward'. Then read on
>> >> > syntax classes. Then, be enlightened :)
>> >> >
>> >> >From the help for skip-syntax-forward, if syntax starts with ^, skip characters whose syntax is not in syntax.
>> >>
>> >
>> > Nearly.
>> >
>> > Dig deeper: what could that "syntax" thing mean? Did you read on syntax
>> > classes in the manual? Does this answer your question?
>> >
>> I have read.  Looks as if emacs has internal functionality to determine start and end of elisp
>> expressions, which rainbow-delimiters relies of.  It does actually also follow [], not so for {}.   
>>
>
> Read again:
>
>  The “syntax class” of a character describes its syntactic role.  Each
>  syntax table specifies the syntax class of each character.  There is no
>  necessary relationship between the class of a character in one syntax
>  table and its class in any other table.
>
> So whether { resp } have the syntax class symbolised by ( resp. ) depends
> on how you set up your syntax class table. Major modes set that up to match
> the expectations of the language in question. In theory you could even set
> # . up as opening and closing parentheses whenever it makes sense.
>
> The answer is: Emacs _already does_ what you want.
>
How can I do it exactly?