Oddly enough, Steele pretty much already did this as a readtable example in his classic manual (based on xappings and xets from Connection Machine Lisp): http:/

Oddly enough, Steele pretty much already did this as a readtable example in his classic manual (based on xappings and xets from Connection Machine Lisp): http://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node192.html#XAPPINGMACROCHARTABLE http://www.cs.cmu.edu/Groups/AI/html/cltl/clm/node192.html#X...