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(.module:
lux
(lux (control [monad #+ do]
["ex" exception #+ exception:])
(data [bit]
[maybe]
["e" error #+ Error]
text/format
(coll [array]))
[host])
(luxc [lang]
(lang (host ["_" php #+ Expression Statement])))
[//])
(do-template [<name>]
[(exception: #export (<name> {message Text})
message)]
[Not-A-Variant]
[Null-Has-No-Lux-Representation]
[Cannot-Evaluate]
)
(host.import: java/lang/Object
(toString [] String)
(getClass [] (Class Object)))
(host.import: java/lang/Long
(intValue [] Integer))
(exception: #export (Unknown-Kind-Of-Host-Object {host-object Object})
(let [object-class (:coerce Text (Object::toString [] (Object::getClass [] (:coerce Object host-object))))
text-representation (:coerce Text (Object::toString [] (:coerce Object host-object)))]
(format object-class " --- " text-representation)))
(host.import: php/runtime/Memory)
(host.import: php/runtime/memory/NullMemory)
(host.import: php/runtime/memory/FalseMemory)
(host.import: php/runtime/memory/TrueMemory)
(host.import: php/runtime/memory/LongMemory
(new [long])
(toLong [] long))
(host.import: php/runtime/memory/DoubleMemory
(toDouble [] double))
(host.import: php/runtime/memory/StringMemory
(new [String])
(toString [] String))
(host.import: php/runtime/memory/ReferenceMemory
(getValue [] Memory))
(host.import: php/runtime/memory/ArrayMemory
(size [] int)
(isMap [] boolean)
(get [Memory] Memory))
(def: (tuple lux-object host-object)
(-> (-> Object (Error Any)) ArrayMemory (Error Any))
(let [size (ArrayMemory::size [] host-object)]
(loop [idx 0
output (: (Array Any) (array.new (:coerce Nat size)))]
(if (i/< size idx)
(let [value (|> host-object
(ArrayMemory::get [(LongMemory::new [idx])])
(:coerce ReferenceMemory) (ReferenceMemory::getValue []))]
(if (host.instance? php/runtime/memory/NullMemory value)
(recur (inc idx)
(array.write (:coerce Nat idx) (host.null) output))
(do e.Monad<Error>
[lux-value (lux-object value)]
(recur (inc idx)
(array.write (:coerce Nat idx) lux-value output)))))
(ex.return output)))))
(def: (variant lux-object host-object)
(-> (-> Object (Error Any)) ArrayMemory (Error Any))
(do e.Monad<Error>
[variant-tag (lux-object (ArrayMemory::get [(StringMemory::new [//.variant-tag-field])] host-object))
variant-value (lux-object (ArrayMemory::get [(StringMemory::new [//.variant-value-field])] host-object))]
(wrap (: Any
[(Long::intValue [] (:coerce Long variant-tag))
(: Any
(if (|> host-object
(ArrayMemory::get [(StringMemory::new [//.variant-flag-field])])
(:coerce ReferenceMemory)
(ReferenceMemory::getValue [])
(host.instance? php/runtime/memory/NullMemory))
(host.null)
""))
variant-value]))))
(def: (lux-object host-object)
(-> Object (Error Any))
(cond (host.instance? php/runtime/memory/FalseMemory host-object)
(ex.return false)
(host.instance? php/runtime/memory/TrueMemory host-object)
(ex.return true)
(host.instance? php/runtime/memory/LongMemory host-object)
(ex.return (LongMemory::toLong [] (:coerce LongMemory host-object)))
(host.instance? php/runtime/memory/DoubleMemory host-object)
(ex.return (DoubleMemory::toDouble [] (:coerce DoubleMemory host-object)))
(host.instance? php/runtime/memory/StringMemory host-object)
(ex.return (StringMemory::toString [] (:coerce StringMemory host-object)))
(host.instance? php/runtime/memory/ReferenceMemory host-object)
(lux-object (ReferenceMemory::getValue [] (:coerce ReferenceMemory host-object)))
(host.instance? php/runtime/memory/ArrayMemory host-object)
(if (ArrayMemory::isMap [] (:coerce ArrayMemory host-object))
(variant lux-object (:coerce ArrayMemory host-object))
(tuple lux-object (:coerce ArrayMemory host-object)))
## else
(ex.throw Unknown-Kind-Of-Host-Object host-object)))
(def: #export (eval code)
(-> Expression (Meta Any))
(function (_ compiler)
(let [interpreter (|> compiler (get@ #.host) (:coerce //.Host) (get@ #//.interpreter))]
(case (interpreter code)
(#e.Error error)
((lang.throw Cannot-Evaluate error) compiler)
(#e.Success 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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