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From: nagel@paris.ics.uci.edu (Mark Nagel)
Newsgroups: comp.lang.c
Subject: Re: LEX Question
Message-ID: <7701@paris.ics.uci.edu>
Date: 17 Feb 89 19:08:52 GMT
References: <32240@auc.UUCP> <9580001@hpcuhb.HP.COM> <1989Feb15.200741.15963@utzoo.uucp>
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Reply-To: nagel@paris.ics.uci.edu (Mark Nagel)
Organization: University of California, Irvine - Dept of ICS
Lines: 15
In-reply-to: henry@utzoo.uucp (Henry Spencer)

In article <1989Feb15.200741.15963@utzoo.uucp>, henry@utzoo (Henry Spencer) writes:
|In article <9580001@hpcuhb.HP.COM> najmi@hpcuhb.HP.COM (Farrukh Najmi) writes:
|>... one can make it read from a file (using file pointer)
|>by declaring the file pointer variable and then assigning
|>it to yyin...
|
|Be careful:  this is not a documented feature, at least not in all versions
|of lex, and therefore should not be relied on too heavily in portable code.

Is there any reason (other than losing stdin) that you couldn't just
freopen stdin to the new input file?  That should be portable enough...

Mark Nagel @ UC Irvine, Dept of Info and Comp Sci
ARPA: nagel@ics.uci.edu              | Charisma doesn't have jelly in the
UUCP: {sdcsvax,ucbvax}!ucivax!nagel  | middle. -- Jim Ignatowski