Path: csiph.com!au2pb.net!usenet.blueworldhosting.com!feeder01.blueworldhosting.com!border2.nntp.dca1.giganews.com!nntp.giganews.com!news.iecc.com!.POSTED!nerds-end
From: Jens Kallup <jkallup@web.de>
Newsgroups: comp.compilers
Subject: lex - how to get current file position of parser file
Date: Tue, 1 Sep 2015 04:20:53 +0200
Organization: Aioe.org NNTP Server
Lines: 29
Sender: news@iecc.com
Approved: comp.compilers@iecc.com
Message-ID: <15-08-019@comp.compilers>
NNTP-Posting-Host: news.iecc.com
Mime-Version: 1.0
Content-Type: text/plain; charset=utf-8; format=flowed
Content-Transfer-Encoding: 8bit
X-Trace: miucha.iecc.com 1441076872 85621 2001:470:1f07:1126:0:676f:7373:6970 (1 Sep 2015 03:07:52 GMT)
X-Complaints-To: abuse@iecc.com
NNTP-Posting-Date: Tue, 1 Sep 2015 03:07:52 +0000 (UTC)
Keywords: lex, question
Posted-Date: 31 Aug 2015 23:07:52 EDT
X-submission-address: compilers@iecc.com
X-moderator-address: compilers-request@iecc.com
X-FAQ-and-archives: http://compilers.iecc.com
Xref: csiph.com comp.compilers:1595

Hello,

I used flex, and bison under Linux.  But how can I handle multiple
input files?  When I follow the examples of the documentation, I fail
to handle tokens after include file.

Example:

PRINT "Before"
SET PROCEDURE TO testproc
PRINT "After"

this is a abstract language, which does (should) open a file called
"testproc".

But I can not handle line 3.
I try to "ftell" the position after testproc,
but get the size of the parser file.

So, now I have no glue, how to fix that.  It would be great, if
someone have a idea, and maybe a short code snippet.

Thanks
Jens
[Flex buffers its input, so you can't just do an ftell().  Use the
yy_create_buffer() and related routines.  If you have a copy of my
book "flex & bison" there's an example of nested include files in
chapter 2. -John]