Re: push lexer?

Johann 'Myrkraverk' Oskarsson <johann@2ndquadrant.com>
Mon, 30 Jan 2012 23:28:09 +0000

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Related articles
push lexer? detlef.bosau@web.de (Detlef Bosau) (2012-01-17)
Re: push lexer? haberg-news@telia.com (Hans Aberg) (2012-01-17)
Re: push lexer? johann@2ndquadrant.com (Johann 'Myrkraverk' Oskarsson) (2012-01-30)
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From: Johann 'Myrkraverk' Oskarsson <johann@2ndquadrant.com>
Newsgroups: comp.compilers
Date: Mon, 30 Jan 2012 23:28:09 +0000
Organization: Compilers Central
References: 12-01-032 12-01-036
Keywords: lex
Posted-Date: 30 Jan 2012 23:28:27 EST

Hans Aberg <haberg-news@telia.com> writes:


> On 2012/01/17 10:28, John Levine wrote:
>>> Bison 2.5 has a "push api".
>>> http://www.gnu.org/software/bison/manual/html_node/Push-Parser-Function.html
>>>
>>> Does there exist something similar for lex of flex or does
>>> somebody know a "push scanner"?
>
>> [Not that I've ever seen. It would be straightforward to modify
>> flex to create push lexers that work with push parsers, but so far
>> nobody's done it. -John]
>
> FYI, Flex is currently not maintained or developed.


> [That's true, but it's sitting at Sourceforge, ready for anyone who
> wants to pick it up. http://sourceforge.net/projects/flex/ -John]


There is also Reflex, maintained by Thomas Dickey at


http://invisible-island.net/reflex/reflex.html


He is most likely known as the guy behind ncurses and xterm.


I use Reflex among other things because I do use the -P flag too -- it
is broken in SourceForge Flex.




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