[Chicken-janitors] Re: #113: Crunch egg: bug in define-crunch-primitives / define-crunch-callback

[Chicken Trac]

#113: Crunch egg: bug in define-crunch-primitives / define-crunch-callback
------------------------+---------------------------------------------------
 Reporter:  jeronimo    |       Owner:       
     Type:  defect      |      Status:  new  
 Priority:  minor       |   Milestone:       
Component:  extensions  |     Version:  4.2.x
 Keywords:  crunch      |  
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Comment(by jeronimo):

 BTW, since you mentioned that Crunch is kind of complicated, I suppose it
 would be difficult to make it accept more types as arguments for
 callbacks?

 I'd like to do something like this:

 {{{
 ;; m if a heterogeneous vector of f64vectors
 (define-crunch-callback
    (vector->f64vector-ref (SOME-TYPE m) (int i)) f64vector
    (vector-ref m i))
 }}}

 This is to compare different multidimensional matrix implementations
 (either as a single vector, or as vector-of-vectors). In the vector-of-
 vectors case, I'd have to use heterogeneous vectors in all dimensions but
 the last:

 vector of vector of vector of f64vector

 (This is because I have some evidence that it may actually be quite fast)

 But I could not get it to work: I've tried c-pointer and blob as "SOME-
 TYPE" above. blob is not allowed that, and if I use c-pointer, the code
 compiles but later complains (at execution time) that the Scheme vector is
 not a c-pointer.

-- 
Ticket URL: <http://www.irp.oist.jp/trac/chicken/ticket/113#comment:6>
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