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* refactor program memory for encapsulation and remove special treatment of return values Signed-off-by: Nick Cameron <nrc@ncameron.org> * Refactor ProgramMemory to isolate mutation Signed-off-by: Nick Cameron <nrc@ncameron.org> * Refactor ProgramMemory Signed-off-by: Nick Cameron <nrc@ncameron.org> * Generated output Signed-off-by: Nick Cameron <nrc@ncameron.org> * Cache the result of executing modules for their items Signed-off-by: Nick Cameron <nrc@ncameron.org> * Compress envs when popped Signed-off-by: Nick Cameron <nrc@ncameron.org> * Remove the last traces of geometry from the memory module Signed-off-by: Nick Cameron <nrc@ncameron.org> * docs Signed-off-by: Nick Cameron <nrc@ncameron.org> * Fixups Signed-off-by: Nick Cameron <nrc@ncameron.org> * Frontend Signed-off-by: Nick Cameron <nrc@ncameron.org> * Improve Environment GC Signed-off-by: Nick Cameron <nrc@ncameron.org> * Fixup mock execution frontend and interpreter, misc bug fixes Signed-off-by: Nick Cameron <nrc@ncameron.org> --------- Signed-off-by: Nick Cameron <nrc@ncameron.org>