[Swift-devel] mapping structures

[Ben Clifford]

I was thinking about some fmri stuff for a tutorial exercise and came up 
with this question:

.img and .hdr files come in the input in pairs, like this:

$ ls Raw/
anatomy1.hdr  anatomy2.hdr  anatomy3.hdr  anatomy4.hdr  reference.hdr
anatomy1.img  anatomy2.img  anatomy3.img  anatomy4.img  reference.img

so from a data type perspective it makes sense to say something like:

type inputimage {
  file img;
  file data;
}

but then do any of the existing mappers let me map into this structure? or 
do I have to write a custom mapper?

(to torture syntax, express something like: 
inputimg ref; 
 ref.img <"reference.img">;
 ref.hdr <"reference.hdr">; 
)

I think I can do this with the CSV mapper, with the input file pairs 
specified as CSV rows; but this needs a CSV to be externally generated 
from information that is already expressed in the metadata in the filename 
so doesn't particularly help.

--