Does VAR match input? Uses (or updates) and returns bindings. ( l e t ((binding (get-binding var

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"Does VAR match input? Uses (or updates) and returns bindings."

( l e t ((binding (get-binding var bindings)))

(cond ((not binding) (extend-bindings var input bindings))

((equal input (binding-val binding) bindings)

(t f a i l ) ) ) )

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