Someone already mentioned PLOT. This would be a good thing to lookup when designing your hygienic macro system, http://users.rcn.com/david-moon/PLOT/index.html

Someone already mentioned PLOT. This would be a good thing to lookup when designing your hygienic macro system, http://users.rcn.com/david-moon/PLOT/index.html http://users.rcn.com/david-moon/PLOT/index.html. The author was also involved in Dylan, which is another infix language with hygienic macros.