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Re: Regarding replacing regexp


From: Barry Margolin
Subject: Re: Regarding replacing regexp
Date: Thu, 10 May 2012 23:10:40 -0400
User-agent: MT-NewsWatcher/3.5.3b3 (Intel Mac OS X)

In article <mailman.942.1336705240.855.help-gnu-emacs@gnu.org>,
 XeCycle <XeCycle@Gmail.com> wrote:

> Deniz Dogan <deniz@dogan.se> writes:
> 
> > On 2012-05-10 11:37, shirish wrote:
> >> Hi,
> >>
> >> I am in the process of learning how to use emacs. I know about the
> >> replace-regexp but I am unable to create a regular expression to do the
> >> below.
> >> Any help is much appreciated.
> >>
> >> public static final String SUCCESS //Successmesg
> >> public static final String FAILURE  //failuremessage
> >>
> >> I need to replace that with
> >>
> >> public static final String SUCCESS = "SUCCESS";//Successmesg
> >> public static final String FAILURE  = "FAILURE"; //failuremessage
> >>
> >> Thanks,
> >> Shirish.
> >>
> >>
> >
> > There are a lot of ways to do it.  One could be:
> >
> > String \([^ ]+\)
> >
> > and replace it with:
> >
> > String \1 = "\1"
> 
> This won't do very well.

Except that he forgot the semicolon, what's wrong about it?

> 
> Try:
> 
> SUCCESS\|FAILURE => \& = "\&";
> 
> I may be wrong about those escapes, try it.

You're assuming those are the only names he has to replace.  The first 
responder assumed that they were just examples of a common pattern.

Plus, your version will replace them in other contexts, e.g. the program 
is likely to contain something like:

if (...) return SUCCESS;

but you wouldn't want to change this with the replacement.

-- 
Barry Margolin, barmar@alum.mit.edu
Arlington, MA
*** PLEASE post questions in newsgroups, not directly to me ***


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