What does (looking-at "\\>") mean?

What does (looking-at "\\>") mean?

[Wang Lei]

Hi, all.

I copied a piece of code like this:

(defun my-indent-or-complete ()
  (interactive)
  (if (looking-at "\\>")
      (hippie-expand nil)
    (indent-for-tab-command)))

But, I can't figure out what this "\\>" means. Could someone give me a
explanation ?

Many thanks!

-- 
Regards
Lei

RE: What does (looking-at "\\>") mean?

[Drew Adams]

>   (looking-at "\\>")
> 
> But, I can't figure out what this "\\>" means.
> Could someone give me a explanation ?

Ask Emacs. Emacs will give you an explanation.
`C-h f looking-at' tells you: 

,----
| Return t if text after point matches regular expression REGEXP.
| This function modifies the match data that `match-beginning',
| `match-end' and `match-data' access; save and restore the match
| data if you want to preserve them.
`----

IOW, (looking-at "\\>") returns t if the text following the cursor matches the
regexp "\\>".

Now you might want to ask Emacs about regexps...

Re: What does (looking-at "\\>") mean?

[weber]

From the emacs info on regexps:

`\>'
     matches the empty string, but only at the end of a word.  `\>'
     matches at the end of the buffer only if the contents end with a
     word-constituent character.

HTH
Hugo

Wang Lei wrote:
> Hi, all.
>
> I copied a piece of code like this:
>
> (defun my-indent-or-complete ()
>   (interactive)
>   (if (looking-at "\\>")
>       (hippie-expand nil)
>     (indent-for-tab-command)))
>
> But, I can't figure out what this "\\>" means. Could someone give me a
> explanation ?
>
> Many thanks!
>
> --
> Regards
> Lei

Re: What does (looking-at "\\>") mean?

[Wang Lei]

I searched in elisp-info, but forgot emacs-info. :( Now, I got it.
Thanks for your all!

On 1/25/09, weber <hugows@gmail.com> wrote:
> From the emacs info on regexps:
>
> `\>'
>      matches the empty string, but only at the end of a word.  `\>'
>      matches at the end of the buffer only if the contents end with a
>      word-constituent character.
>
> HTH
> Hugo
>
> Wang Lei wrote:
>> Hi, all.
>>
>> I copied a piece of code like this:
>>
>> (defun my-indent-or-complete ()
>>   (interactive)
>>   (if (looking-at "\\>")
>>       (hippie-expand nil)
>>     (indent-for-tab-command)))
>>
>> But, I can't figure out what this "\\>" means. Could someone give me a
>> explanation ?
>>
>> Many thanks!
>>
>> --
>> Regards
>> Lei
>


-- 
Regards
Lei

Re: What does (looking-at "\\>") mean?

[Thierry Volpiatto]

Wang Lei <wanglei.198112@gmail.com> writes:

> I searched in elisp-info, but forgot emacs-info. :( Now, I got it.
> Thanks for your all!
>
> On 1/25/09, weber <hugows@gmail.com> wrote:
>> From the emacs info on regexps:
>>
>> `\>'
>>      matches the empty string, but only at the end of a word.  `\>'
>>      matches at the end of the buffer only if the contents end with a
>>      word-constituent character.
>>
>> HTH
>> Hugo
>>
>> Wang Lei wrote:
>>> Hi, all.
>>>
>>> I copied a piece of code like this:
>>>
>>> (defun my-indent-or-complete ()
>>>   (interactive)
>>>   (if (looking-at "\\>")
>>>       (hippie-expand nil)
>>>     (indent-for-tab-command)))
>>>
>>> But, I can't figure out what this "\\>" means. Could someone give me a
>>> explanation ?

With this little function, you can understand what looking at does:

Write a word in scratch buffer and leave point at end of word, then do
M-x test-looking-at

Then put the point at the beginning of word and run again test-looking-at

,----
| (defun test-looking-at ()
|   (interactive)
|   (if (looking-at "\\>")
|       (message "There is nothing after point")
|       (message "there is something after point")))
`----



-- 
A + Thierry Volpiatto
Location: Saint-Cyr-Sur-Mer - France

Re: What does (looking-at "\\>") mean?

[Wang Lei]

On 1/26/09, Thierry Volpiatto <thierry.volpiatto@gmail.com> wrote:
>
> With this little function, you can understand what looking at does:
>
> Write a word in scratch buffer and leave point at end of word, then do
> M-x test-looking-at
>
> Then put the point at the beginning of word and run again test-looking-at
>
> ,----
> | (defun test-looking-at ()
> |   (interactive)
> |   (if (looking-at "\\>")
> |       (message "There is nothing after point")
> |       (message "there is something after point")))
> `----
Problem is solved.:) But, I'll remember this trick. Helpfull!

Thanks!
>
>
>
> --
> A + Thierry Volpiatto
> Location: Saint-Cyr-Sur-Mer - France
>
>
>
>


-- 
Regards
Lei