Re: [Nano-devel] [PATCH] syntax: perl: don't color the character after a variable name

[Benno Schulenberg]

Op 08-08-19 om 21:00 schreef Brand Huntsman:
> On Thu, 8 Aug 2019 20:11:43 +0200 Benno Schulenberg <address@hidden>
> wrote:
> 
>> The $/ gets highlighted as if it were a variable.  :| The $\ gets colored as
>> if were a variable.
> 
> Those are probably mostly only set, and dropping them would improve
> readability. The following would highlight them when set.
> 
> color cyan "(^|[[:space:]])\$[\\/]"

Added in the upcoming third version (but with a single backslash: there
is no need to escape a backslash within []).

The current rules also color @$, @&, &$, and &&, for example.  And that
last one certainly is not a variable name and should not be colored as
one.  Maybe only $<punct> is a variable name, and not @<punct>, %<punct>,
and &<punct>?

Also, for the leading-caret part (\^[]A-Z^_?\[]), why are ] and ^ and ?
and \ and [ allowed after a leading caret?  I don't see them anywhere
in the perlvar document.  I only see things like $^A, $^X, and $^_, but
not $^] et cetera.

The assumptions of the above two paragraphs I've worked into the upcoming
third version of the patch.

> Substitution and match are already handled,

Ah, indeed.  But... I think the 'white' was meant to undo the overcoloring
by the regex for variable names.  So probably it should be changed to 'normal'.
But that is a different issue.

Benno

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