redefinable input() unput(): want old lex/flex de-POSIXed

Douglas Ray <dougray@cpan.org>
Tue, 16 Dec 2008 00:11:04 +1100

          From comp.compilers
Related articles
redefinable input() unput(): want old lex/flex de-POSIXed dougray@cpan.org (Douglas Ray) (2008-12-16)
Re: redefinable input() unput(): want old lex/flex de-POSIXed gneuner2@comcast.net (George Neuner) (2008-12-16)
| List of all articles for this month |
From: Douglas Ray <dougray@cpan.org>
Newsgroups: comp.compilers
Date: Tue, 16 Dec 2008 00:11:04 +1100
Organization: Melbourne PC User Group Inc
Keywords: lex, history
Posted-Date: 15 Dec 2008 12:43:57 EST

I'm revisiting a parser from 1991-1993, last compiled on SunOS (BSD, pre Solaris).


Where are the patches to Flex to enable redefining input() and
unput()? Surely someone's done this? Or is there some other LEX
implementation that escaped POSIX, and will compile on NetBSD
3.something?


The project is a shell, has > 1000 lines related to
completion/expansion mechanisms of input tokens which I do not want to
relearn/rewrite just for POSIX disabilities.


Sorry if this is a FAQ. Thanks for any pointers,


Douglas Ray
[I've just been reviewing the history of lex and flex for my upcoming flex&bison,
and you have a problem. The internal structure of flex is utterly unlike that of
lex, and it's hard to imagine a patch to let you redefine input and unput(). The
ancient v7 sources are available, although I suspect that making them compile will
be hard. What version of lex does opensolaris have? -John]


Post a followup to this message

Return to the comp.compilers page.
Search the comp.compilers archives again.