[antlr-interest] Java Parser to analyze C++ language syntax

[David Wigg]

I've retired from maintaining this C/C++ parser but I've been following
recent discussions with some puzzlement as at the moment I can't see what
the aim is. I regret I have lost track of who raised this question, perhaps
he/she could let us know what text is to be parsed, the aim and the reason
for it

Before replying I draw your attention to the information below about the
language definition which is in my download. You will see that it makes it
clear that the grammar alone is not sufficient. The words in para 1 under
the two lines are from Bjarne's book.

Thanks,

David.

 C++ Language Definition

Notes:
DW 23/04/03
This data was originally obtained from,
http://www.csci.csusb.edu/dick/C++std/cd2/gram.html
I have converted the original hyphens separating words in names to
underscores and the opt(ional) indicator at the end of names to -opt to aid
searching.
As this file is stored in text mode the textual distinction between reserved
keywords
and other words has been lost. The keywords should be listed in any book
about C++.
DW 27/09/04
This data has been modified to match the grammar listed in Appendix A of
"The C++ Programming Language" Third Edition by Bjarne Stroustrup
ISBN 0201889544
Deleted or amended lines of the original (old) text are shown within []
brackets. Lines copied from the book are shown as "Book line".
One line was added from "C++ In a Nutshell" First edition, ISBN 059600298X
I would be grateful if anyone could let me know if it needs updating
at wiggjd at bcs.org.uk
  ______________________________________________________________________
  Annex 0 (informative)
  Grammar summary                                                 [gram]
  ______________________________________________________________________
1 This summary of C++ syntax is intended to be an aid to  comprehension.
  It  is  not  an  exact  statement of the language.  In particular, the
  grammar described here accepts a superset  of  valid  C++  constructs.
  Disambiguation rules (_stmt.ambig_, _dcl.spec_, _class.member.lookup_)
  must be applied to distinguish expressions  from  declarations.   Fur-
  ther,  access  control, ambiguity, and type rules must be used to weed
  out syntactically valid but meaningless constructs.
  1.1  Keywords                                               [gram.key]
1 New context_dependent keywords are introduced into a program by  type_
  def  (_dcl.typedef_),  namespace  (_namespace.def_),  class (_class_),
  enumeration (_dcl.enum_), and template (_temp_) declarations.
          typedef_name:
                  identifier
          namespace_name:
                  original_namespace_name
                  namespace_alias
          original_namespace_name:
                  identifier
          namespace_alias:
                  identifier
          class_name:
                  identifier
                  template_id
          enum_name:
                  identifier
          template_name:
                  identifier
  Note that a typedef_name naming a class is also a class_name
  (_class.name_).


Message: 9
Date: Tue, 03 Mar 2009 11:18:49 -0500
From: Andy Tripp <antlr at jazillian.com>
Subject: Re: [antlr-interest] Java Parser to analyze C++ language
       syntax
To: Kaleb Pederson <kaleb.pederson at gmail.com>
Cc: antlr-interest at antlr.org
Message-ID: <49AD5869.9030502 at jazillian.com>
Content-Type: text/plain; charset=UTF-8; format=flowed
Kaleb Pederson wrote:
> In looking at LLVM a bit more closely, although both the FAQ and the
> features page mention full C++ support,
"full C++ support" - heh, that would be impossible ;)
Seems like pretty much any random sequence of characters would be
valid C++.
> One note on David Wigg's C++ grammar, it seemed well documented
> although, IIRC, it used a slightly patched version of ANTLR or its
> runtime which makes it a bit more difficult to use than would be
> typical.
IIRC, Wigg's C++ grammar chokes if you ever give it enough ugly C++
to chew on. As Terrence quips in his book "Back when C++ was almost
parsable...".
Andy
>
> --Kaleb
>
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