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|
(.module:
[lux #*
["." type]
["." host (#+ import:)]
[abstract
[monad (#+ do)]]
[control
["." function]
["." exception (#+ exception:)]
["<>" parser
["<.>" type (#+ Parser)]]
pipe]
[data
["." error (#+ Error)]
["." text
format]
[format
[xml (#+ XML)]
[json (#+ JSON)]]
[collection
["." array (#+ Array)]
["." list ("#@." functor)]]]
[time
[instant (#+ Instant)]
[duration (#+ Duration)]
[date (#+ Date)]]
[macro
["." template]]])
(import: #long java/lang/String)
(import: #long (java/lang/Class a)
(getCanonicalName [] java/lang/String))
(import: #long java/lang/Object
(new [])
(toString [] java/lang/String)
(getClass [] (java/lang/Class java/lang/Object)))
(import: #long java/lang/Integer
(longValue [] java/lang/Long))
(import: #long java/lang/Long
(intValue [] java/lang/Integer))
(import: #long java/lang/Number
(intValue [] java/lang/Integer)
(longValue [] long)
(doubleValue [] double))
(def: #export (inspect value)
(-> Any Text)
(let [object (:coerce java/lang/Object value)]
(`` (<| (~~ (template [<class> <processing>]
[(case (host.check <class> object)
(#.Some value)
(`` (|> value (~~ (template.splice <processing>))))
#.None)]
[java/lang/Boolean [%b]]
[java/lang/String [%t]]
[java/lang/Long [.int %i]]
[java/lang/Number [java/lang/Number::doubleValue %f]]
))
(case (host.check (Array java/lang/Object) object)
(#.Some value)
(let [value (:coerce (Array java/lang/Object) value)]
(case (array.read 0 value)
(^multi (#.Some tag)
[(host.check java/lang/Integer tag)
(#.Some tag)]
[[(array.read 1 value)
(array.read 2 value)]
[last?
(#.Some choice)]])
(let [last? (case last?
(#.Some _) #1
#.None #0)]
(|> (format (%n (.nat (java/lang/Integer::longValue tag)))
" " (%b last?)
" " (inspect choice))
(text.enclose ["(" ")"])))
_
(|> value
array.to-list
(list@map inspect)
(text.join-with " ")
(text.enclose ["[" "]"]))))
#.None)
(java/lang/Object::toString object)))
))
(exception: #export (cannot-represent-value {type Type})
(exception.report
["Type" (%type type)]))
(type: Representation (-> Any Text))
(def: primitive-representation
(Parser Representation)
(`` ($_ <>.either
(do <>.monad
[_ (<type>.exactly Any)]
(wrap (function.constant "[]")))
(~~ (template [<type> <formatter>]
[(do <>.monad
[_ (<type>.sub <type>)]
(wrap (|>> (:coerce <type>) <formatter>)))]
[Bit %b]
[Nat %n]
[Int %i]
[Rev %r]
[Frac %f]
[Text %t])))))
(def: (special-representation representation)
(-> (Parser Representation) (Parser Representation))
(`` ($_ <>.either
(~~ (template [<type> <formatter>]
[(do <>.monad
[_ (<type>.sub <type>)]
(wrap (|>> (:coerce <type>) <formatter>)))]
[Type %type]
[Code %code]
[Instant %instant]
[Duration %duration]
[Date %date]
[JSON %json]
[XML %xml]))
(do <>.monad
[[_ elemT] (<type>.apply (<>.and (<type>.exactly List) <type>.any))
elemR (<type>.local (list elemT) representation)]
(wrap (|>> (:coerce (List Any)) (%list elemR))))
(do <>.monad
[[_ elemT] (<type>.apply (<>.and (<type>.exactly Maybe) <type>.any))
elemR (<type>.local (list elemT) representation)]
(wrap (|>> (:coerce (Maybe Any))
(case> #.None
"#.None"
(#.Some elemV)
(format "(#.Some " (elemR elemV) ")"))))))))
(def: (variant-representation representation)
(-> (Parser Representation) (Parser Representation))
(do <>.monad
[membersR+ (<type>.variant (<>.many representation))]
(wrap (function (_ variantV)
(let [[lefts right? sub-repr] (loop [lefts 0
representations membersR+
variantV variantV]
(case representations
(#.Cons leftR (#.Cons rightR extraR+))
(case (:coerce (| Any Any) variantV)
(#.Left left)
[lefts #0 (leftR left)]
(#.Right right)
(case extraR+
#.Nil
[lefts #1 (rightR right)]
extraR+
(recur (inc lefts) (#.Cons rightR extraR+) right)))
_
(undefined)))]
(format "(" (%n lefts) " " (%b right?) " " sub-repr ")"))))))
(def: (tuple-representation representation)
(-> (Parser Representation) (Parser Representation))
(do <>.monad
[membersR+ (<type>.tuple (<>.many representation))]
(wrap (function (_ tupleV)
(let [tuple-body (loop [representations membersR+
tupleV tupleV]
(case representations
#.Nil
""
(#.Cons lastR #.Nil)
(lastR tupleV)
(#.Cons headR tailR)
(let [[leftV rightV] (:coerce [Any Any] tupleV)]
(format (headR leftV) " " (recur tailR rightV)))))]
(format "[" tuple-body "]"))))))
(def: representation
(Parser Representation)
(<>.rec
(function (_ representation)
($_ <>.either
primitive-representation
(special-representation representation)
(variant-representation representation)
(tuple-representation representation)
(do <>.monad
[[funcT inputsT+] (<type>.apply (<>.and <type>.any (<>.many <type>.any)))]
(case (type.apply inputsT+ funcT)
(#.Some outputT)
(<type>.local (list outputT) representation)
#.None
(<>.fail "")))
(do <>.monad
[[name anonymous] <type>.named]
(<type>.local (list anonymous) representation))
(<>.fail "")
))))
(def: #export (represent type value)
(-> Type Any (Error Text))
(case (<type>.run type ..representation)
(#error.Success representation)
(#error.Success (representation value))
(#error.Failure error)
(exception.throw cannot-represent-value type)))
|
