giles
4c6790046c
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Parser collects multiple bindings via 'and', emitting (:def-rec-mut BINDINGS) for let-rec chains and (:def-mut BINDINGS) for non-rec. Single bindings keep the existing (:def …) / (:def-rec …) shapes. Eval (def-rec-mut): allocate placeholder cell per binding, build joint env where each name forwards through its cell, then evaluate each rhs against the joint env and fill the cells. Even/odd mutual-rec works.