Saturday, November 23, 2024

Re: Re: Syntax: Using \v (very magic) in patterns in syntax files



 

------ Original Message ------
From: bpj@melroch.se
To: vim_use@googlegroups.com Cc: bpj@melroch.se
Sent: Saturday, November 23rd 2024, 15:34
Subject: Re: Syntax: Using \v (very magic) in patterns in syntax files
 



 

Den lör 23 nov. 2024 14:35'c.willis111 ' via vim_use <vim_use@googlegroups.com> skrev:
 



 

------ Original Message ------
From: bpj@melroch.se
To: bpj@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:
 

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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