* 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
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+* impl_def_val: allow num_exp
+* fix right recursion of let_exp and set_exp
+* numeral suffixes
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