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| From | silas poulson <Silas8642@hotmail.co.uk> |
| Newsgroups | comp.compilers |
| Subject | Re: How change grammar to equivalent LL(1) ? |
| Date | Wed, 11 Nov 2020 08:27:35 -0800 (PST) |
| Organization | Compilers Central |
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| Keywords | parse |
| Posted-Date | 11 Nov 2020 11:51:35 EST |
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An even later response, but thought quote from course notes (§5.6.5 available here <http://cs.rhul.ac.uk/courses/CS3470/>) I'm currently pursuing might be useful. *LL(1) grammars* Grammars which admit non-back-tracking top down LL(1) parsers are precisely the ones which are left factored, follow determined and have no left recursion. Thus we have the following definition: A context-free grammar is LL(1) if for all non-terminals A and productions A ::= α|β we have 1. first(α) ∩ first(β) = ∅ 2. If A ∗⇒ ε then first(A) ∩ follow(A) =∅.
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Re: How change grammar to equivalent LL(1) ? Christopher F Clark <christopher.f.clark@compiler-resources.com> - 2019-12-23 05:57 -0500
Re: How change grammar to equivalent LL(1) ? Lasse Hillerøe Petersen <lhp+news@toft-hp.dk> - 2020-04-24 16:21 +0000
Re: How change grammar to equivalent LL(1) ? Kaz Kylheku <773-297-7223@kylheku.com> - 2020-04-24 18:13 +0000
Re: How change grammar to equivalent LL(1) ? silas poulson <Silas8642@hotmail.co.uk> - 2020-11-11 08:27 -0800
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