Hi All,

I have been working on the new parser the past couple of weeks and
thought I'd mention it at this point as it is starting to come along.
The work I have done is based on the parser that was in the Jsound
directory of csound5.  I have been continuing work in a separate
branch of CVS named "NewParser" as I had talked with John and we came
to the conclusion that it was best to create a branch versus
committing to HEAD considering the upcoming 5.03 release.

As to the current status within the NewParser branch:

-SConstruct has been modified to include the new parser files when
building libcsound, including calls to YACC (Bison) and Lex (Flex)

-lex and yacc files have been moved into Engine and have been modified
quite a bit since the last checkin I did to Jsound in the HEAD branch

-Parser and Lexer have been made reentrant using Bison's %pure-parser directive

-parser is currently building a rudimentary AST (changed from building
a parse tree)

-stubs added for doing verification, optimization, and compilation of the AST

-all of the new parser code has been done in such a way as not to
interfere with the old parser; Csound defaults to the old parser but
will use the new parser by passing in "--new-parser"

-the code is a bit messy and no doubt needs much review and revision
for memory leaks, formatting, etc.

I have been using a *very* simple CSD file for testing.  As the AST is
now building, I am planning on working on the compilation next to see
if I can get sound out of Csound.  There is certainly a lot to do, but
I am taking the approach of creating a CSD that breaks the parser, see
if I can get everything to a point where it'll compile, then add a
feature to break parsing again and then repeat until it can be feature
complete.  I am planning on building a test suite of CSD files
sometime that could be run with both old and new parser to take a more
test-driven approach, and will work on that after I get past the first
CSD(!).

Well, that's about it so far.  Please feel free to check out and jump
in to the NewParser branch if you've got the time, and to ask any
questions.

Thanks!
steven

-------------------------------------------------------------------------
Using Tomcat but need to do more? Need to support web services, security?
Get stuff done quickly with pre-integrated technology to make your job easier
Download IBM WebSphere Application Server v.1.0.1 based on Apache Geronimo
http://sel.as-us.falkag.net/sel?cmd=lnk&kid=120709&bid=263057&dat=121642
_______________________________________________
Csound-devel mailing list
Csound-devel@lists.sourceforge.net