Re: backslashes in pgindent

Bruce,
> I found that parentheses in gawk regular expressions require backslashes
> so they are not treated as regex groupings:
>
> $ echo '('|awk '$0 ~ /(/ {print $0}'
> awk: cmd. line:1: fatal: Unmatched ( or \(: /(/
> $ echo '('|awk '$0 ~ /\(/ {print $0}'
> (

> Now, it seems closing parentheses are OK because there is no open group,
> but I think I should use backslashes there too:
>
> $ echo ')'|awk '$0 ~ /)/ {print $0}'
> )
> $ echo ')'|awk '$0 ~ /\)/ {print $0}'
>
> Does your awk produce different results? What version is it? Mine is GNU Awk
> 3.0.6.

Yes - on the last test, mine emits the ")" and yours apparently does not.
The version I ran with is 3.1.4.

The escaped parenthesis in the unpatched pgindent causes the following
warning:

$ pgindent test.c
Hope you installed /src/tools/pgindent/indent.bsd.patch.
awk: cmd. line:12: warning: escape sequence `\)' treated as plain `)'

Which implies an unnecessary escaping, which appears to function correctly
without the escape.

Cheers,

- Luke