[C2hs] Re: [Gtk2hs-devel] A new lexer/parser for c2hs

Gour list at atmarama.org
Tue May 31 11:35:37 EDT 2005


Duncan Coutts (duncan.coutts at worc.ox.ac.uk) wrote:

> I'll integrate the new parser into the gtk2hs fork of c2hs. I'll keep
> both versions of the lexer & parser in it with the choice selectable by
> a command line switch. This will allow us to test that the new parser is
> producing exactly the same output as the old parser.

Great. Go ahead.

> We can ask gtk2hs-0.9.8 release candidate testers to run a few checks to
> make sure that this is indeed the case for the header files on their
> platform.

Nice.

> The basic check is to see that the precomp files produced by each method
> is the same but I'll add another couple dump options to allow the C AST
> and the result of the name analysis to be dumped.
> 
> If we can do this test at least once on each supported platform (Linux,
> Solaris, FreeBSD, Windows, MacOS X?) then I think we can be quite
> confident that the new parser is not going to introduce subtle bugs.

At least, fixing (potential) bugs will be easier than non-compile ;)

> After all that when we're confident it's working correctly, we can tidy
> our c2hs fork up be removing the old lexer & parser and send patches for
> the mainline c2hs.

Two flies in one hit :-)


> Currently, on my machine the two variants: 
>$ c2hs +RTS -M380m -RTS --precomp=gtk.precomp.old-parser --old-parser gtk/gtk.h>$ c2hs +RTS -M80m -RTS --precomp=gtk.precomp.new-parser              gtk/gtk.h
> 
> produce exactly the same output. :-)

OK. Give us some input for testing ;)

Sincerely,
Gour


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