Re: [pure-lang-users] C macros

[Eddie R. <er...@bm...>]

On Mon, 2008-08-25 at 23:22 +0200, Albert Graef wrote:

> Yes, sentinels. They're on my TODO list for 0.6, which I started working 
> on today (yes, you can already find some nifty new stuff in svn ;-).

Great. MACROS :)

GSL gives two methods of handling errors, (1) the gsl function returns
success or failure (0, 1, or null for alloc) or (2) a gsl error handler
that will abort the program. IMO, (2) cause too much havoc and you might
like some type of a soft real time system for music. However, for (1)
how about invoking a rule that can be overridden by the user like with
the csv module?

Two final things would be all I need to get matrices working (and I know
your working on a type system): Some way to designate a matrix type. And
a way to get at the fields of a struct. Then, I could write:

a::Matrix + b::Matrix = m if ok
                        when 
                          m = gsl_matrix_alloc (a->size1) (a->size2);
			  c_ok = gsl_matrix_memcopy m a;
                          a_ok = gsl_matrix_add m b;
                        end;

gsl_matrix returns it's value through the first parameter. So, to keep
referential transparency, I need to copy a to m before adding. Somewhere
in there I have to mark m for garbage collection as well.

The only way to get matrices with complex entries or int entries is to
go through the BLAS interface as I see it. Weird that I have to
implement both the gsl_matrix_ stuff and BLAS but some of the later
stuff uses the gsl_matrix_* routines.

e.r.

e.r.