Re: C++ intermediate representation.

"Ira Baxter" <idbaxter@semdesigns.com>
21 May 2005 00:00:53 -0400

          From comp.compilers

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Re: C++ intermediate representation. bjarne@gmail.com (bjarne) (2005-05-15)
Re: C++ intermediate representation. cfc@shell01.TheWorld.com (Chris F Clark) (2005-05-16)
Re: C++ intermediate representation. idbaxter@semdesigns.com (Ira Baxter) (2005-05-21)
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From: "Ira Baxter" <idbaxter@semdesigns.com>
Newsgroups: comp.compilers
Date: 21 May 2005 00:00:53 -0400
Organization: http://extra.newsguy.com
References: 05-05-023 05-05-068 05-05-077
Keywords: C++, parse

"Chris F Clark" <cfc@shell01.TheWorld.com> wrote in message
> > Parsing C++ properly is no mean feat. C++'s grammar is ambiguous, as
> > well as the basic type/identifier ambiguity C has, C++ has its own
> > ambiguities.


> First, there is no grammar that one can parse with a backtracking
> recursive descent parser that cannot be parsed with a GLR parser.


I agree with Chris, although we might talk about how long it takes to
parse in cases where there is considerable ambiguity.


However, we seem to be parsing C++ just fine, ambiguities and all,
with our GLR parser (built into the DMS Software Reengineering
Toolkit). And it matches the one in the reference manually pretty
closely.


I can attest personally to the convenience of being able to write
context free rules that *just work*.
--
Ira D. Baxter, Ph.D., CTO 512-250-1018
Semantic Designs, Inc. www.semdesigns.com



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