Re: [bug-gawk] BUG: Gawk interval expression metacharacter {} is not working as expected

[Quantum.Saturn]

Hi David, Arnold,

Thanks for your replies and help. After rethinking of how the pattern matching
will work for 'beginning of the string mismatch cases'  (i.e. 'jjjjas' and 'jjjjjas'),
I finally got it and its NOT a bug. Thanks for showing the usage of anchor in
this scenario.

I will also reject this non-issue on ubuntu distribution.

Thanks & Regards,

Sanjeev Ranot

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-------- Original Message --------

Subject: Re: [bug-gawk] BUG: Gawk interval _expression_ metacharacter {} is not working as expected

Local Time: November 19, 2017 1:03 AM

UTC Time: November 18, 2017 7:33 PM

From: address@hidden

To: address@hidden, address@hidden

address@hidden

Davide's answer is right. Thanks Davide.

If you don't understand why, let me know.

Arnold

Davide Brini address@hidden wrote:

On Sat, 18 Nov 2017 12:13:04 -0500, "Quantum.Saturn"

address@hidden wrote:

Hi,

I have reported the following bug with Ubuntu distribution.

This needs to go upstream, so I reporting it here.

BUG DESCRIPTION:

The interval _expression_ metacharacter {} is not working as expected. The

problem specifically being when the interval is defined on the first

character of the string/record. Otherwise if the interval is defined on

any other character apart from the first in the string then its working

as expected.

INPUT FILE DATA: metacharfile

jas

jjas

jjjas

jjjjas

jjjjjas

COMMAND:

gawk '/j{1,3}as/' ./metacharfile

EXPECTED RESULT:

jas

jjas

jjjas

ACTUAL RESULT:

jas

jjas

jjjas

jjjjas

jjjjjas

You forgot to anchor the _expression_ to the beginning of the string to match.

Try with

gawk '/^j{1,3}as/' ./metacharfile

--

D.