Den lör 23 nov. 2024 16:56'c.willis111 ' via vim_use <
vim_use@googlegroups.com> skrev:
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> ------ Original Message ------
> From: b...@melroch.se
> To: vim_use@googlegroups.com Cc: b...@melroch.se
> Sent: Saturday, November 23rd 2024, 15:34
> Subject: Re: Syntax: Using \v (very magic) in patterns in syntax files
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> Den lör 23 nov. 2024 14:35'c.willis111 ' via vim_use <
> vim_use@googlegroups.com> skrev:
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>>
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>>
>> ------ Original Message ------
>> From: b...@melroch.se
>> To: b...@melroch.se Cc: vim_use@googlegroups.com
>> Sent: Saturday, November 23rd 2024, 13:25
>> Subject: Syntax: Using \v (very magic) in patterns in syntax files
>>
>> I have noticed that patterns in published syntax files never use the `\v`
>> (very magic) modifier. Is there any deeper reason than people's preferences
>> for this? Being used to Perl patterns I practically always use it and find
>> it hard to keep track of when to use backslashes when not using it. The
>> result is that more or less subtle errors creep in when I'm writing a
>> syntax file, so I'd prefer to use it unless it's a Really Bad Idea.
>>
>>
>>
>> Hi
>>
>> I deeply sympathise with you. It seems complete madness that the slashing
>> is different for various quantifiers. (* recognised as a meta character,
>> but not + or ?). My reading of the help suggests that very magic doesn't
>> cure this.
>>
>>
>>
>>
> It does in that all ASCII punctuation characters can be escaped to be
> "normal" and those that are metacharacters are meta when not escaped. Word
> characters, quite sensibly do still need a backslash to be meta. That's
> consistent enough for me.
>
> You seem to be talking about the perl behaviour, which seems consistent to
> me. My whinge was about the vim behaviour. Heree's a help snippet:
>
> That's magic. Very magic and very nomagic are distinct from magic and
nomagic. They are each other's opposite and both are consistent but there
are currently no options for them: you have to use the `\v` and `\V`
modifiers in the pattern (or `\m` and `\M` but why? :-) You can even use
them to change behavior in the middle of a pattern!
>From the help:
*/\v* */\V*
Use of "\v" means that after it, all ASCII characters except '0'-'9',
'a'-'z',
'A'-'Z' and '_' have special meaning: "very magic"
Use of "\V" means that after it, only a backslash and the terminating
character (usually / or ?) have special meaning: "very nomagic"
Examples:
after: \v \m \M \V matches ~
'magic' 'nomagic'
a a a a literal 'a'
\a \a \a \a any alphabetic character
. . \. \. any character
\. \. . . literal dot
$ $ $ \$ end-of-line
* * \* \* any number of the previous atom
~ ~ \~ \~ latest substitute string
() \(\) \(\) \(\) group as an atom
| \| \| \| nothing: separates alternatives
\\ \\ \\ \\ literal backslash
\{ { { { literal curly brace
>
> 4. Overview of pattern items pattern-overview
> E865 E866 E867 E869
>
> Overview of multi items. /multi E61 E62
> More explanation and examples below, follow the links. E64 E871
>
> multi
> 'magic' 'nomagic' matches of the preceding atom
> /star * \* 0 or more as many as possible
> /\+ \+ \+ 1 or more as many as possible
> /\= \= \= 0 or 1 as many as possible
> /\? \? \? 0 or 1 as many as possible
>
>
>> regards - Chris
>>
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