[Top][All Lists]

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

Re: Escaping a ',' in autoconf

From: Ralf Wildenhues
Subject: Re: Escaping a ',' in autoconf
Date: Wed, 26 Oct 2005 09:00:02 +0200
User-agent: Mutt/1.5.11

* Ralf Wildenhues wrote on Wed, Oct 26, 2005 at 08:53:26AM CEST:
> * Kristis Makris wrote on Wed, Oct 26, 2005 at 03:07:47AM CEST:
> > 
> > I'm having a hard time escaping a comma (',') in autoconf. I'm trying to
> > set to a variable the regular expression: [,\s#]. I can set almost
> > everything, except the comma:
> > 
> > DEVEL_CONFIG_TEMPLATE_BUGID_SPLIT_REGEX="@<:@address@hidden:@@:>@"
> > 
> > Can anyone recommend how this is done ?
> Outside of any macro definitions or calls (the former is really a
> special case of the latter), a comma should not hurt at all.
> Inside, you should ensure to have quoted enough.  The general rule is:
> One level of quotation per level of nesting.

And I forgot the other half of the mail, sorry:
Literals are to be quoted twice.  So then you end up writing the literal
or, in other words:

Some people prefer to put the outer pair of brackets (which are really
just the second m4 quotation further outside, at least for more
complicated expressions:

instead of

but since m4 really doesn't care much about shell syntax, it does not
matter so much, but is up to personal preference.


reply via email to

[Prev in Thread] Current Thread [Next in Thread]