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(.module:
lux
(lux (control ["p" parser]
["ex" exception #+ exception:]
[monad #+ do])
(data ["E" error]
(coll (dict ["dict" unordered #+ Dict])))))
(exception: #export (Unknown-Property {property Text})
property)
(type: #export Context
(Dict Text Text))
(type: #export (Property a)
(p.Parser Context a))
(def: #export (property name)
(-> Text (Property Text))
(function (_ context)
(case (dict.get name context)
(#.Some value)
(ex.return [context value])
#.None
(ex.throw Unknown-Property name))))
(def: #export (run context property)
(All [a] (-> Context (Property a) (E.Error a)))
(case (property context)
(#E.Success [_ output])
(#E.Success output)
(#E.Error error)
(#E.Error error)))
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