Re: strange record behavior in MCL2.0B1P2 (system 7) (again)

[alms (Andrew LM Shalit)]

> From: cartier@math.uqam.ca (Guillaume Cartier)
> Subject: strange record behavior in MCL2.0B1P2 (system 7) (again)
> 
> > You cannot simply pretend that something is a pointer and not a 
handle.
> > You have to actually make it a pointer.  You get a pointer from a 
handle
> > by dereferencing it.
> > 
> > If a bitmap is a handle, then you cannot say:
> > 
> > (rref b :bitmap.bounds :storage :pointer)
> > 
> > You must say
> > 
> > (with-dereferenced-handles ((b-pointer b))
> >  (rref b :bitmap.bounds :storage :pointer))
> > 
> > Of course, if you do this and the handle is then relocated, you 
will
> > lose.
> 
> But (make-bitmap 0 0 10 10) returns a pointer!!!
> 
> ? (setq b (make-bitmap 0 0 10 10))
> #<A Mac Zone Pointer Size 34 #x18D240>
> 
> Guillaume Cartier
> LACIM, Universite du Quebec a Montreal.
> Bureau: (514) 987-4290
> E-Mail: cartier@math.uqam.ca
> 
> 

In that case, it sounds like there is a bug in make-bitmap or in the 
record definition of bitmaps!