[SOVLED] Re: Detecting first characters in a line ?

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On 07/17/2010 09:20 PM, Tony Mechelynck wrote:
> On 17/07/10 14:15, Aaron Lewis wrote:
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>> On 07/17/2010 07:51 PM, Frank Blendinger wrote:
>>> Hi.
>>>
>>> Aaron Lewis<aaron.lewis1989@gmail.com> (2010-07-17 19:24 +0800):
>>>> I'm trying to implement a custom script used for commenting and
>>>> uncommenting , we have two types , like c-style `//' and shell-style
>>>> `#'
>>>> , how can i detect the first characters ?
>>>
>>> Not really answering your question, but if you aren't writing the script
>>> just for fun or education I would recommend the existing NERD commenter
>>> plugin, which does its job pretty well for all kinds of comments:
>>
>> OK , i've just got some ideas from that plugin , as i'm doing a custom
>> plugin , what's wrong with this func , anybody give a try ?
>>
>> func! CommentingOut()
>> if filetype == ""
>> s/^/#/<CR>
>> else
>> s/^/\/\//<CR>
>> endif
>> endfunc
>>
>> Thanks
>
> Hm, the logic looks a little too simple. There are a lot of filetypes,

Doesn't matter for me right now ;-) You've got it , should be regex here.

> detected by Vim, for which C++-like comments won't be acceptable. In
> addition, since script lines are ex-commands, you don't need additional
> <CR> characters at the end. And finally, you may want to separate your
> comment leader from the text by a space.

Right

Ah, and, "filetype" without the
> quotes is a user-defined variable name. To get the option you need a &
> prefix, see ":help expr-option".
>

Yep.

> I haven't tried the following (based on the above function), but what do
> you think of it?
>
> function CommentOut() range
> if &filetype =~? '^c$\|^cpp$\|^css$\|^javascript$'
> exe a:firstline . ',' . a:lastline . 's/^/\/\/ /'
> else
> exe a:firstline . ',' . a:lastline . 's/^/# /'
> endif
> endfunc
>

Great , works fine.

At first glance , i'm just trying to remove comments by determining the
first character , maybe by file type is more reliable. I'm just thinking
about macros in c language.

- --
Best Regards,
Aaron Lewis - PGP: 0x4A6D32A0
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