Announcing PyCs, a new Python-like language on .Net

Terry Reedy tjreedy at
Thu Sep 2 20:26:29 CEST 2004

"Roy Smith" <roy at> wrote in message 
news:roy-5662B4.09003502092004 at
> Ville Vainio <ville at> wrote:
>> I imagine regexps have been around long before perl, though I might be
>> wrong.
> Regex's were around long before Perl.  I first saw regex in about 1977
> or so when I was learning Unix v6.  They were used extensively in ed,
> sed, grep, awk, and maybe a few other tools.  Perl grew up sometime in
> the 80's, in an attempt to unify all those tool (plus shell) into a
> single language.

Regexes were invented by Stephen Kleene in the context of formal languages
I believe in the 1950s
The * operator once (and still is by some people) called the Kleene star.

Terry J. Reedy

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