On 14 July 2010 22:37, Andrew Coppin
(The small problem with the approach above, of course, is that as soon as the function wants to do comparisons or take flow control decisions, you've got trouble. It's not impossible to solve, but it *is* a lot of work...)
Hi Andrew You could try pairing both the Dye representation and a genuinely numeric one in the same type. Kansas Lava - a embedded hardware description language - uses this technique to be able to both interpret signals and generate them. There is a new paper describing Kansas Lava here: http://www.ittc.ku.edu/csdl/fpg/biblio http://www.ittc.ku.edu/csdl/fpg/sites/default/files/kansas-lava-ifl09.pdf I think Antony Courtney was also using a dual representation in the graphics program Haven - shallow so it could use normal function mechanism to calculate "point in polygon" and deep so it could build interfaces across the JNI bridge in Java. Best wishes Stephen