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(.module:
lux
(lux (control ["ex" exception #+ exception:])
(data [bit]
["e" error #+ Error]
text/format
(coll [array]))
[host])
(luxc [lang])
[//])
(host.import java/lang/Object
(toString [] String))
(host.import java/lang/Number
(doubleValue [] double)
(longValue [] Long))
(host.import java/lang/Integer
(longValue [] Long))
(host.import javax/script/ScriptEngine
(eval [String] #try #? Object))
(host.import jdk/nashorn/api/scripting/JSObject
(isArray [] boolean)
(isFunction [] boolean)
(getMember [String] #? Object)
(hasMember [String] boolean))
(host.import jdk/nashorn/api/scripting/AbstractJSObject)
(host.import jdk/nashorn/api/scripting/ScriptObjectMirror
(size [] int))
(host.import jdk/nashorn/internal/runtime/Undefined)
(host.import luxc/lang/translation/js/IntValue
(getValue [] Long))
(host.import luxc/lang/translation/js/StructureValue
(getValue [] (Array Object)))
(def: (int js-object)
(-> ScriptObjectMirror (Maybe Int))
(case [(JSObject::getMember [//.int-high-field] js-object)
(JSObject::getMember [//.int-low-field] js-object)]
(^multi [(#.Some high) (#.Some low)]
(and (host.instance? Number high)
(host.instance? Number low))
[[(Number::longValue [] (:! Number high))
(Number::longValue [] (:! Number low))]
[high low]])
(#.Some (nat-to-int (n/+ (|> high (:! Int) int-to-nat (bit.shift-left +32))
(|> low (:! Int) int-to-nat))))
_
#.None))
(def: (extend-array by input)
(All [a] (-> Nat (Array a) (Array a)))
(let [size (array.size input)]
(|> (array.new (n/+ by size))
(array.copy size +0 input +0))))
(def: (array element-parser js-object)
(-> (-> Object (Error Top)) ScriptObjectMirror (Maybe (Array Object)))
(if (JSObject::isArray [] js-object)
(let [init-num-keys (int-to-nat (ScriptObjectMirror::size [] js-object))]
(loop [num-keys init-num-keys
idx +0
output (: (Array Object)
(array.new init-num-keys))]
(if (n/< num-keys idx)
(let [idx-key (|> idx nat-to-int %i)]
(case (JSObject::getMember idx-key js-object)
(#.Some member)
(case (element-parser member)
(#e.Success parsed-member)
(recur num-keys
(n/inc idx)
(array.write idx (:! Object parsed-member) output))
(#e.Error error)
#.None)
#.None
(recur (n/inc num-keys)
(n/inc idx)
(extend-array +1 output))))
(#.Some output))))
#.None))
(exception: #export Unknown-Kind-Of-JS-Object)
(exception: #export Null-Has-No-Lux-Representation)
(def: (lux-object js-object)
(-> Object (Error Top))
(`` (cond (host.null? js-object)
(ex.throw Null-Has-No-Lux-Representation "")
(host.instance? Integer js-object)
(ex.return (Integer::longValue [] (:! Integer js-object)))
(or (host.instance? java/lang/Boolean js-object)
(host.instance? java/lang/String js-object))
(ex.return js-object)
(host.instance? Number js-object)
(ex.return (Number::doubleValue [] (:! Number js-object)))
(~~ (do-template [<interface> <method>]
[(host.instance? <interface> js-object)
(ex.return (<method> [] (:! <interface> js-object)))]
[StructureValue StructureValue::getValue]
[IntValue IntValue::getValue]))
(host.instance? ScriptObjectMirror js-object)
(let [js-object (:! ScriptObjectMirror js-object)]
(case (int js-object)
(#.Some value)
(ex.return value)
#.None
(case (array lux-object js-object)
(#.Some value)
(ex.return value)
#.None
## (JSObject::isFunction [] js-object)
## js-object
## else
(ex.throw Unknown-Kind-Of-JS-Object (Object::toString [] (:! Object js-object))))))
## else
(ex.throw Unknown-Kind-Of-JS-Object (Object::toString [] (:! Object js-object))))))
(exception: #export Cannot-Evaluate)
(def: #export (eval code)
(-> //.Expression (Meta Top))
(function [compiler]
(case (|> compiler
(get@ #.host)
(:! //.Host)
(get@ #//.interpreter)
(ScriptEngine::eval [code]))
(#e.Error error)
((lang.throw Cannot-Evaluate error) compiler)
(#e.Success output)
(case output
#.None
(#e.Success [compiler []])
(#.Some output)
(case (lux-object output)
(#e.Success parsed-output)
(#e.Success [compiler parsed-output])
(#e.Error error)
((lang.throw Cannot-Evaluate error) compiler))))))
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