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Re: [vox-tech] regex expansion tool, anyone?
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Re: [vox-tech] regex expansion tool, anyone?

  • Subject: Re: [vox-tech] regex expansion tool, anyone?
  • From: Chuck Polisher <cpolish@MAPSns.net>
  • Date: Tue, 28 Nov 2000 19:51:33 -0800
  • References: 20001127132311.A16553@houseag.com

> Does anyone know of a tool that will show all possible matches to character
> class regexes? E.g., [a-f][RvP][3fk].

# showmatch: show strings that match regular expresion
# usage: showmatch [regular expression] [file] 
pat=$1; shift
gawk 'match($0,pat) > 0 {
        s = substr($0,1,RSTART-1)
        m = substr($0,1,RLENGTH)
        gsub (/[^\b- ]/, " ", s)
        gsub (/./,       "^", m)
        printf "%s\n%s%s\n", $0, s, m
}' pat="$pat" $*

source: Unix Power Tools, Peek, 2nd ed.

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