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(.module:
[lux (#- false true or and not)
[data
[number
["r" rev ("#@." interval)]]]])
(def: #export true Rev r@top)
(def: #export false Rev r@bottom)
(template [<name> <chooser>]
[(def: #export <name>
(-> Rev Rev Rev)
<chooser>)]
[and r.min]
[or r.max]
)
(def: #export (not input)
(-> Rev Rev)
(r.- input ..true))
(def: #export (implies consequent antecedent)
(-> Rev Rev Rev)
(or (not antecedent)
consequent))
(def: #export (includes sub super)
(-> Rev Rev Rev)
(let [-sub (not sub)
sum (r.+ -sub super)
no-overflow? (.and (r.>= -sub sum)
(r.>= super sum))]
(if no-overflow?
sum
..true)))
(def: #export (= left right)
(-> Rev Rev Rev)
(and (or (not left) right)
(or left (not right))))
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