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2022-01-14Write a first draft macro expander.Rose Hogenson6-161/+414
Committing it because it compiles. I have to write tests and debug it still.
2022-01-13Rewrite match to use exceptions.Rose Hogenson1-17/+43
This makes the control flow more clear, and eliminates the need to scan the pattern twice. It also makes it easier to add new forms by consolidating the pattern logic in one procedure.
2022-01-13Use := instead of = for variable assignment.Rose Hogenson1-1/+1
I was reading about the difference, and := does what you want more often than not.
2022-01-13Generalize the hash map.Rose Hogenson3-35/+48
Before we were assuming keys could be compared with eqv?. But it seems like that assumption isn't true when we want to hold identifiers in the hash map.
2022-01-11Move scheme compiler into a separate directory.Rose Hogenson27-0/+1749