[antlr-interest] Re: Seperating Grammar and Actions..

[micheal_jor <open.zone at virgin.net>]

> I've remarked on this before but not in a year or two so... :-)
> 
> I'm very much of the opinion that for any non-trivial translator, 
the only
> thing that the parser should do is to build the AST and any 
auxiliary data
> structures that only it can build and nothing else.  I.e., no
> syntax-directed, parser translators for anything that's non-trivial.

This can be interpreted as "strive for no [minimal?] embedded action 
code in parsers for non-trivial translators". Is this what you meant?

<SNIPPED-stuff-I-agree-with/>

> For many translators, that's just making passes over the AST and
> doing annotation, pruning, rearrangement, and some insertions.  For 
others,
> that's a basis from which to build additional auxiliary structures
> (e.g., def-use, use-def chains) or more specialized IRs (e.g., 
machine
> specific tuple formats).

Can all the remaining work be specified as ANTLR tree parsers (this 
is related to my other post about resolvers-etc-as-treeparsers I 
guess) ?.

Any links/cites to information (particularly practical implementation 
related info) on some of these other passes and auxilliary structures 
please?

Micheal



 

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