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Subject: Re: why does not  work my regex-bilder right?
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David Kastrup <dak@gnu.org> writes:

> beonit <beonit@gmail.com> writes:
>
>> i want search previous digit, repeated 3 times in my regex-builder
>> mode
>>
>> "[[:digit:]]\{3\}"
>> or
>> "[[:digit:]]{3}"
>>
>> but not work. why?
>
> IIRC, repeat counts don't "specialize" the previous expression.  It
> probably works to use parens for that, like
>
> \([[:digit:]]\)\{3\}

In regexp-builder you need double backquotes.
"\\([[:digit:]]\\)\\{3\\}"