precedences vs. hierarchy

Andreas Schramm <bassobajo@gmail.com>
Mon, 6 Jun 2016 09:08:56 +0200

          From comp.compilers
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From: Andreas Schramm <bassobajo@gmail.com>
Newsgroups: comp.compilers
Date: Mon, 6 Jun 2016 09:08:56 +0200
Organization: Compilers Central
Injection-Info: miucha.iecc.com; posting-host="news.iecc.com:2001:470:1f07:1126:0:676f:7373:6970"; logging-data="19132"; mail-complaints-to="abuse@iecc.com"
Keywords: parse, question
Posted-Date: 06 Jun 2016 08:35:43 EDT

Hi all,


for specifying the syntax of operator expressions
with multiple levels of precedences,
there are essentially two approaches:
(i) by precedence and associativity declarations, and
(ii) by a hierarchy of non-terminals.
Both approaches have been known and in use for decades.


My question is:
Are there trends in the public opinion
in favor of one of them over the other?
Or are they equally respected approaches?


Best regards,
Andreas


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