Remove some more computation_for_reg( ).
Remove some more computation_for_reg( ).
Rename access_result and remove clear_result.
Add token arguments to common functions.
Start looking up computations in the virtual mappings.
Make map_reg( ) and unmap_reg( ) use their tokens.
Allow lookup from reg -> modified.
Add some sanity to creating and destroying mappings.
Add comment.
Move result out of computation and into the mapping.
Add list of modified modifiables.
Track the root token.
Update mappings when deleting degree 2 nodes.
Add token to clear_call_for_reg( ).
Add token arg to set_call( ) and set_call_unsafe( ).
Add token arguments to more methods.
Remove long, soon-to-be out-dated comment.
Make used_inputs be in terms of computations.
Fix dot_graph_for_token.
Start using some token ids.