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(.module:
lux
(lux (control ["ex" exception #+ exception:]
[monad #+ do])
(data [bit]
[maybe]
["e" error #+ Error]
[text "text/" Eq<Text>]
text/format
(coll [array]))
[host])
(luxc [lang]
(lang (host ["_" common-lisp #+ Expression])))
[//])
(host.import: java/lang/Object
(toString [] String)
(getClass [] (Class Object)))
(host.import: java/lang/Long
(intValue [] Integer))
(host.import: (java/lang/Class ?)
(#static forName [String] #try (Class Object)))
(def: _0
Any
(case (Class::forName "org.armedbear.lisp.Symbol")
(#e.Success _)
(log! "LOADED")
(#e.Error error)
(log! error)))
(do-template [<name>]
[(exception: #export (<name> {message Text})
message)]
[Null-Has-No-Lux-Representation]
[Cannot-Evaluate]
[invalid-variant]
)
(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: org/armedbear/lisp/LispObject)
(host.import: org/armedbear/lisp/SimpleString
(getStringValue [] String))
(host.import: org/armedbear/lisp/Symbol
(#static T Symbol)
(getName [] String))
(host.import: org/armedbear/lisp/DoubleFloat
(doubleValue [] double))
(host.import: org/armedbear/lisp/Bignum
(longValue [] long))
(host.import: org/armedbear/lisp/Fixnum
(longValue [] long))
(host.import: org/armedbear/lisp/Nil)
(host.import: org/armedbear/lisp/SimpleVector
(length [] int)
(elt [int] LispObject))
(def: (parse-tuple lux-object host-object)
(-> (-> Object (Error Any)) SimpleVector (Error Any))
(let [size (:coerce Nat (SimpleVector::length [] host-object))]
(loop [idx +0
output (:coerce (Array Any) (array.new size))]
(if (n/< size idx)
(case (lux-object (SimpleVector::elt [(:coerce Int idx)] host-object))
(#e.Error error)
(#e.Error error)
(#e.Success lux-value)
(recur (inc idx) (array.write idx (:coerce Any lux-value) output)))
(#e.Success output)))))
(def: (variant tag flag value)
(-> Nat Bit Any Any)
[(Long::intValue [] (:coerce Long tag))
(: Any
(if flag
//.unit
(host.null)))
value])
(host.import: org/armedbear/lisp/Cons
(car LispObject)
(cdr LispObject))
(def: (parse-variant lux-object host-object)
(-> (-> Object (Error Any)) Cons (Error Any))
(let [variant-tag (Cons::car host-object)]
(if (and (host.instance? org/armedbear/lisp/Symbol variant-tag)
(text/= //.variant-tag (Symbol::getName [] (:coerce Symbol variant-tag))))
(do e.Monad<Error>
[#let [host-object (:coerce Cons (Cons::cdr host-object))]
tag (lux-object (Cons::car host-object))
#let [host-object (:coerce Cons (Cons::cdr host-object))]
#let [flag (host.instance? org/armedbear/lisp/SimpleString
(Cons::car host-object))]
value (lux-object (Cons::cdr host-object))]
(wrap (..variant (:coerce Nat tag) flag value)))
(ex.throw invalid-variant (:coerce Text (Object::toString [] (:coerce Object host-object)))))))
(def: (lux-object host-object)
(-> Object (Error Any))
(cond (host.instance? org/armedbear/lisp/Bignum host-object)
(#e.Success (Bignum::longValue [] (:coerce Bignum host-object)))
(host.instance? org/armedbear/lisp/Fixnum host-object)
(#e.Success (Fixnum::longValue [] (:coerce Fixnum host-object)))
(host.instance? org/armedbear/lisp/DoubleFloat host-object)
(#e.Success (DoubleFloat::doubleValue [] (:coerce DoubleFloat host-object)))
(host.instance? org/armedbear/lisp/Nil host-object)
(#e.Success #0)
(host.instance? org/armedbear/lisp/Symbol host-object)
(if (is? Symbol::T (:coerce Symbol host-object))
(#e.Success #1)
(ex.throw Unknown-Kind-Of-Host-Object (:coerce Object host-object)))
(host.instance? org/armedbear/lisp/SimpleString host-object)
(#e.Success (SimpleString::getStringValue [] (:coerce SimpleString host-object)))
(host.instance? org/armedbear/lisp/SimpleVector host-object)
(parse-tuple lux-object (:coerce SimpleVector host-object))
(host.instance? org/armedbear/lisp/Cons host-object)
(parse-variant lux-object (:coerce Cons host-object))
## else
(ex.throw Unknown-Kind-Of-Host-Object (:coerce 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)
(exec (log! (format "eval #e.Error\n"
"<< " (_.expression code) "\n"
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)
(exec (log! (format "eval #e.Error\n"
"<< " (_.expression code) "\n"
error))
((lang.throw Cannot-Evaluate error) compiler)))))))
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