regex support

[Ryan Bowman]

Does emacs support the regex syntax {4} or any of it's
variants?  I'd like to match a date a la 2005-04-19,
so I'm trying (for the year part) something like
"[0-9]{4}", but unless I'm doing something wrong it
doesn't seem to be working.  Assuming it doesn't
support that, is there a better way to match an string
of digits of length 4 than "[0-9][0-9][0-9][0-9]"?

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Ryan Bowman

While any text editor can save your files, only Emacs can save your soul. -- 
Per Abrahamsen

Emacs is not built by hate of vi. vi is irrelevant - it is no more than a 
strange punishment that the unbelievers submit themselves to. -- Matan Ninio
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