Re: Ignore break line sometimes

Path	csiph.com!x330-a1.tempe.blueboxinc.net!usenet.pasdenom.info!news.lightlink.com!usenet.osg.ufl.edu!usenet.stanford.edu!news.iecc.com!nerds-end
From	Joshua Cranmer <Pidgeot18@verizon.invalid>
Newsgroups	comp.compilers
Subject	Re: Ignore break line sometimes
Date	Sun, 12 Feb 2012 12:03:13 -0600
Organization	Compilers Central
Lines	24
Sender	johnl@iecc.com
Approved	comp.compilers@iecc.com
Message-ID	<12-02-017@comp.compilers> (permalink)
References	<12-02-010@comp.compilers>
NNTP-Posting-Host	news.iecc.com
X-Trace	leila.iecc.com 1329081308 18613 64.57.183.58 (12 Feb 2012 21:15:08 GMT)
X-Complaints-To	abuse@iecc.com
NNTP-Posting-Date	Sun, 12 Feb 2012 21:15:08 +0000 (UTC)
Keywords	parse
Posted-Date	12 Feb 2012 16:15:08 EST
X-submission-address	compilers@iecc.com
X-moderator-address	compilers-request@iecc.com
X-FAQ-and-archives	http://compilers.iecc.com
Xref	x330-a1.tempe.blueboxinc.net comp.compilers:457

Show key headers only | View raw

On 2/11/2012 8:56 AM, Geovani de Souza wrote:
> Hi all!
>
> I'm trying write an parser to my compiler, and I'm interessed to
> ignore the break line (\n) sometimes. E.g:
>
> if true then [\n] foo(); [\n] end; [\n]
>
> So, in the first line, the '\n' after 'then' isn't important, but in
> the second "foo();" could replace the need of the semicolon to
> conclude the statement, or still, in the 'end'.

It sounds like you want something like ECMAScript's magic
you-don't-always-need-a-semicolon feature.
<http://bclary.com/2004/11/07/#a-7.9> describes how it works in detail.
The thrust of it is that "if you see an invalid token, but you saw a
newline before, automatically insert a semicolon to fix things."

There are more than a few people who believe that this feature should
not have been implemented.

--
Beware of bugs in the above code; I have only proved it correct, not
tried it. -- Donald E. Knuth

Back to comp.compilers | Previous | Next — Previous in thread | Next in thread | Find similar

Thread

Ignore break line sometimes Geovani de Souza <geovanisouza92@gmail.com> - 2012-02-11 06:56 -0800
  Re: Ignore break line sometimes Hans-Peter Diettrich <DrDiettrich1@aol.com> - 2012-02-11 17:28 +0100
  Re: Ignore break line sometimes George Neuner <gneuner2@comcast.net> - 2012-02-11 12:59 -0500
  RE: Ignore break line sometimes "Karsten Nyblad" <uu3kw29sb7@snkmail.com> - 2012-02-12 09:21 +0100
    Re: Ignore break line sometimes Kaz Kylheku <kaz@kylheku.com> - 2012-02-13 00:16 +0000
  Re: Ignore break line sometimes Stefan Monnier <monnier@iro.umontreal.ca> - 2012-02-12 10:48 -0500
  Re: Ignore break line sometimes Joshua Cranmer <Pidgeot18@verizon.invalid> - 2012-02-12 12:03 -0600
    Re: Ignore break line sometimes Gene Wirchenko <genew@ocis.net> - 2012-02-19 20:57 -0800
      Re: Ignore break line sometimes glen herrmannsfeldt <gah@ugcs.caltech.edu> - 2012-02-20 08:09 +0000
        Re: Ignore break line sometimes arnold@skeeve.com (Aharon Robbins) - 2012-02-23 21:51 +0000
          Re: Ignore break line sometimes "Jonathan Thornburg" <jthorn@astro.indiana.edu> - 2012-02-27 03:49 +0000
  Re: Ignore break line sometimes "BartC" <bc@freeuk.com> - 2012-02-14 00:25 +0000

csiph-web