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Groups > comp.compilers > #2517
| From | Lasse Hillerøe Petersen <lhp+news@toft-hp.dk> |
|---|---|
| Newsgroups | comp.compilers |
| Subject | ECMAScript grammar notation |
| Date | 2020-05-12 07:20 +0000 |
| Organization | SunSITE.dk - Supporting Open source |
| Message-ID | <20-05-004@comp.compilers> (permalink) |
I just looked at https://tc39.es/ecma262/#sec-notational-conventions and noticed that they have been using an extended grammar notation (based on the one used by K&R in The C Programming Language) for some years now. It's not quite a VW-grammar yet, but I presume they introduced it because the language now has so many weird corners, where a general version of a production cannot be used without causing problems. Productions can be parametrized with [Word1,Word2,...], such that a rule Nonterminal[Alfa,Beta] is defines three rules, for Nonterminal, Nonterminal_Alfa and Nonterminal_Beta. RHS Nonterminals can be parametrized in various ways as well. NT[+Alfa], NT[~Alfa], NT[?Alfa] with various meanings. Are there any parser generators out there that support these "features"? /Lasse
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ECMAScript grammar notation Lasse Hillerøe Petersen <lhp+news@toft-hp.dk> - 2020-05-12 07:20 +0000
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