|ECMAScript grammar notation email@example.com (Lasse =?iso-8859-1?q?Hiller=F8e?= Petersen) (2020-05-12)|
|From:||Lasse =?iso-8859-1?q?Hiller=F8e?= Petersen <firstname.lastname@example.org>|
|Date:||12 May 2020 07:20:52 GMT|
|Organization:||SunSITE.dk - Supporting Open source|
|Injection-Info:||gal.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="39264"; mail-complaints-to="email@example.com"|
|Posted-Date:||12 May 2020 11:50:28 EDT|
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"?
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