Re: ceg - C99 LPEG parser

[Andreas Stenius <andreas.stenius@...>]

Looks really nice!

I've not been working in Lua for a while now, time to pick it back up
to take a closer look at this!

BR,
Andreas

2009/10/20 Wesley Smith <wesley.hoke@gmail.com>:
> I've just posted a first release of a C99 parser using LPEG.  This is
> a full parser implementing all of the C99 grammar rules except for
> some of the preprocessor directives. I based it off of
> http://www.open-std.org/JTC1/SC22/wg14/www/docs/n1124.pdf .  In
> addition to defining nearly all of the rules of the C99 grammar, there
> are some convenience data structures and functions.
>
> C99 has tons of rules, so I've also grouped them into sections
> according to Appendix A of the C99 spec.  For example, there are
> listings of identifier_rules, constant_rules, string_literal_rules,
> expression_rules, declaration_rules, statement_rules,
> external_definition_rules, and all_rules as well as a special lpeg.P
> for matching any token called token_patt.  These can be found in the
> c99.ceg module.
>
> The ceg module itself defines some useful functions such as apply
> (apply a set of captures to a grammer (like in LEG)) and scan, which
> will return a scanning function to match a pattern.  See the example
> provided for details.
>
> The example takes a chunk of C code (actually C++ code) and LuaDocs
> the documented functions.  It can process C++ code since it simply
> ignores tokens that don't match the pattern it's looking for through
> the use of the scan function.  One thing of note, typedefs are handled
> by a special table.  Usage is demonstrated in the example.
>
> ceg can be downloaded at: http://www.mat.ucsb.edu/~whsmith/temp/ceg.zip
>
> Feedback is welcome.
>
>
> thanks,
> wes
>