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2 points by CatDancer 4472 days ago | link | parent

Well, MzScheme's eval lets you pass in a namespace. Now a namespace is not a lexical environment. It's simply a collection of names and values. Arc uses one MzScheme namespace for its top-level environment. It would be pretty easy for you to create your own namespace and eval Arc expressions in that namespace, so that they'd see a different "top-level" environment than the main program does. However that's not going to give you access to lexical variables.