[comp.lang.scheme] "box" data type in Chez Scheme.

Esler@BCO-MULTICS.ARPA (12/18/87)

I was looking through the code for a small operating system, posted by
Chris Haynes recently.  I found the functions "box", "set-box!", and
"swap-box!" used as primitives.  Could someone familiar with Chez Scheme
explain what these do ?  Equivalent functions written in standard (R^3)
Scheme would be helpful.

Kevin Esler, Honeywell Bull Inc, Billerica, MA.