Re: Regula expressions: How to find a string without some other string

On Mi, 05 Jul 2017, Igor Forca wrote:

> Hi,
> I have a log file with several text OK and error messages.
>
> OK message is always: AAA000A
>
> Error message starts with AAA, then three numbers (but not three zeros) and letter A.
> Error sample: AAA001A
>
> From the Vim Regular Expression web site:
> http://vimregex.com/#metacharacters
> I can see:
> \d digit
> \D non-digit
>
> To find OK and error message in vim:
> /AAA\d\d\d\D

This will find okay or error messages.

> but how to get only error messages.
>
> Something like:
> - use: /AAA\d\d\d\D
> - except: /AAA000A

Something like this should work:
A\{3}\%(\([^0]\d\{2}\)\|\(\d[^0]\d\)\|\(\d\{2}[^0]\)\)A
which matches 3 As, followed by either:
- a non-zero followed by 2 digits followed by another A or
- a digit followed by a non-zero followed by another digit and A or
- 2 digits followed by a non-zero followed by another A


Best,
Christian
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