Re: [bug-gawk] Numerical repeat is broken.

[Pierre Chartier]

Thanks,

I think my problem was due to the fact that the restriction on availability was not mentioned along with the feature itself in the documentation.  After a thorough examination of the manual, it was clear, of course.  Having a comment about applicability alongside the description of the concept itself would have been nice.

The following nearby comment:

In POSIX awk and gawk, the ‘*’, ‘+’, and ‘?’ operators stand for themselves when there is nothing in the regexp that precedes them. For example, /+/ matches a literal plus sign. However, many other versions of awk treat such a usage as a syntax error.

Does not quite cover the restriction about {n}

Best regards

Pierre

-----Original Message-----
From: Aharon Robbins [mailto:address@hidden]
Sent: Wednesday, February 22, 2012 4:03 PM
To: address@hidden; address@hidden
Cc: address@hidden
Subject: Re: [bug-gawk] Numerical repeat is broken.

FWIW, matching interval expressions is now enabled by default, starting with gawk 4.0.0.

Arnold

> From: "Pierre Chartier" <address@hidden>

> To: "'Andrew J. Schorr'" <address@hidden>

> Date: Fri, 17 Feb 2012 13:40:05 -0500

> Cc: address@hidden

> Subject: Re: [bug-gawk] Numerical repeat is broken.

>

> Thank you very much.

>

> Pierre Chartier

>

> -----Original Message-----

> From: Andrew J. Schorr [mailto:address@hidden

> Sent: Friday, February 17, 2012 12:12 PM

> To: Pierre Chartier

> Cc: address@hidden

> Subject: Re: [bug-gawk] Numerical repeat is broken.

>

> On Thu, Feb 16, 2012 at 03:23:01PM -0500, Pierre Chartier wrote:

>

> BEGIN {

>   printf "Matching v01.02.002\n"

>   if("v01.02.002" ~ /v[0-9]{2}\.[0-9]{2}\.[0-9]{3}/) {printf "1 matches\n"}

>   if("v01.02.002" ~ /v[0-9]*\.[0-9]*\.[0-9]*/) {printf "2 matches\n"}

>   if("v01.02.002" ~ /v[0-9][0-9]\.[0-9]*\.[0-9]*/) {printf "3 matches\n"}

>   if("v01.02.002" ~ /v[0-9]{2}\.[0-9]*\.[0-9]*/) {printf "4 matches\n"}

>   if("v01.02.002" ~ /v[0-9]{2}\.[0-9]{2}\.[0-9]*/) {printf "5

> matches\n"} }

>

> For this to work with gawk, you will need the --re-interval argument:

>

> --re-interval

>      Allow interval expressions in regexps, even if `--traditional' has

>      been provided.  (`--posix' automatically enables interval

>      expressions, so `--re-interval' is redundant when `--posix' is is

>      used.)

>

> Regards,

> Andy

>