+* let the various list types be hashtables where appropriate
+* check out jit-dynamic
+* fix arginfo with nullable types
+* pemalloc
+* CPP style #if(def(ined)) support in parser.re with a HashTable
+* think about a better system for EXTVARs, separate \set and \get functions are clunky
+* impl_def_val: allow num_exp
+* fix right recursion of let_exp and set_exp
+* numeral suffixes
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