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Date: Wed, 4 Nov 2015 21:10:08 +0100
From: <rank1seeker@gmail.com>
To: hackers@freebsd.org
Subject: awk's curly braces (regex)
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10.2-RELEASE-p6

# awk --version
awk version 20121220 (FreeBSD)

# echo 2015 | awk '/^[0-9]/ {print}'
Prints '2015'

# echo 2015 | awk '/^[0-9]{4}/ {print}'
Won't

Why range/interval specified via curly braces doesn't work.
PS: Yes I've tried escaping it with backslahes and double backslahes, nada!

man pages:
--
Regular expressions are as in egrep; see grep(1).
--


Domagoj S.