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Re: [bug-gawk] Does gawk character classes follow this?
From: |
Peng Yu |
Subject: |
Re: [bug-gawk] Does gawk character classes follow this? |
Date: |
Thu, 14 Feb 2019 05:27:26 -0600 |
I don't think the gawk manual is clear.
https://www.gnu.org/software/gawk/manual/html_node/Bracket-Expressions.html#Bracket-Expressions
Why not include the definition in the format similar to the following
to make it unambiguous?
[:alnum:] [a-zA-Z0-9]
[:alpha:] [a-zA-Z]
[:ascii:] [\x00-\x7F]
[:cntrl:] [\x00-\x1F\x7F]
> Why don't you test it and see?
Why don't you make the manual easy to read by making a table similar
to the table in the "Character Classes" section in
https://www.regular-expressions.info/posixbrackets.html
What is the difference between gawk character classes and those
mentioned in that table?
On 2/14/19, address@hidden <address@hidden> wrote:
> Hello.
>
> Peng Yu <address@hidden> wrote:
>
>> Hi,
>>
>> I'd like to make sure the definition of character classes in gawk. Can
>> I use the following link as a reference for the definition?
>>
>> https://www.regular-expressions.info/posixbrackets.html
>
> No. Read The Fine Manual.
>
>> For example, does [:cntrl:] include \x7F?
>
> Why don't you test it and see?
>
> gawk 'BEGIN { print("\x7F" ~ /[[:cntrl:]]/) }'
>
> Arnold
>
--
Regards,
Peng
- [bug-gawk] Does gawk character classes follow this?, Peng Yu, 2019/02/13
- Re: [bug-gawk] Does gawk character classes follow this?, arnold, 2019/02/14
- Re: [bug-gawk] Does gawk character classes follow this?,
Peng Yu <=
- Re: [bug-gawk] Does gawk character classes follow this?, Eli Zaretskii, 2019/02/14
- Re: [bug-gawk] Does gawk character classes follow this?, arnold, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, Eli Zaretskii, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, arnold, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, Eli Zaretskii, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, arnold, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, Wolfgang Laun, 2019/02/15
- Re: [bug-gawk] Does gawk character classes follow this?, Eli Zaretskii, 2019/02/15