Re: EBNF

nkavv@skiathos.physics.auth.gr (Uncle Noah)
28 Nov 2004 23:20:34 -0500

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From: nkavv@skiathos.physics.auth.gr (Uncle Noah)
Newsgroups: comp.compilers
Date: 28 Nov 2004 23:20:34 -0500
Organization: http://groups.google.com
References: 04-11-089
Keywords: syntax
Posted-Date: 28 Nov 2004 23:20:34 EST

> vbdis@aol.com (VBDis) wrote in message news:04-11-089...
> I've just read ISO/IEC 14977 and wonder how useful this standard
> really is?


The ENBF is important indeed. However, not that much parsing tools use
the Extended BNF. Most of them are YACC-like variants or regular BNF.
There is an arguement on the shift-reduce or reduce-reduce conflicts
that tend to occur more often in EBNF grammars.


There is some tool named "ebnf2yacc" you can experiment with.
Personally I use the "GOLD Parser Builder" which uses regular BNF.


Regards


Nikolaos Kavvadias
<nkavv@skiathos.physics.auth.gr>

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