+/*
+2 ways to call an applicable:
+- generically: `<foo bar>`
+- applicably: `<APPLY foo bar>`
+
+generic calls must perform wrapping
+ */
+
+// * applicable (SUBR / simple FUNCTION): eval whole form, call impl
+// * FSUBR: call impl
+// * complex FUNCTION: call impl
+
+// Upon initial entry, `cf->args.body[0]` is the FORM, and
+// `ret` is the result of evaluating the FORM's first position.
+// Typically, the first position will be an ATOM, which is
+// self-evaluating; its value is to be looked up according to the
+// first-position resolution rules:
+// * look for a GVAL
+// * look for a LVAL