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(.module:
lux
(lux (control ["ex" exception #+ exception:]
[monad #+ do])
(data [bit]
[maybe]
["e" error #+ Error]
text/format
(coll [array]))
[host])
(luxc [lang]
(lang (host [r #+ Expression])))
[//])
(do-template [<name>]
[(exception: #export (<name> {message Text})
message)]
[Unknown-Kind-Of-Host-Object]
[Null-Has-No-Lux-Representation]
[Cannot-Evaluate]
)
(host.import java/lang/Object
(toString [] String)
(getClass [] (Class Object)))
(host.import java/lang/Long
(intValue [] Integer))
(host.import org/renjin/sexp/SEXP)
(host.import org/renjin/sexp/StringArrayVector
(getElementAsString [int] String))
(host.import org/renjin/sexp/LogicalArrayVector
(getElementAsRawLogical [int] int))
(host.import org/renjin/sexp/IntArrayVector
(getElementAsInt [int] int))
(host.import org/renjin/sexp/DoubleArrayVector
(getElementAsDouble [int] double))
(host.import org/renjin/sexp/ListVector
(length [] int)
(getElementAsSEXP [int] #try SEXP)
(getElementAsSEXP #as get-field-sexp [String] #try SEXP))
(host.import org/renjin/sexp/Null)
(def: (parse-tuple lux-object host-object)
(-> (-> Object (Error Top)) ListVector (Error Top))
(let [size (:! Nat (ListVector::length [] host-object))]
(loop [idx +0
output (:! (Array Top) (array.new size))]
(if (n/< size idx)
(case (ListVector::getElementAsSEXP [(:! Int idx)] host-object)
(#e.Error error)
(#e.Error error)
(#e.Success value)
(case (lux-object (:! Object value))
(#e.Error error)
(#e.Error error)
(#e.Success lux-value)
(recur (n/inc idx) (array.write idx (:! Top lux-value) output))))
(#e.Success output)))))
(def: (parse-variant lux-object host-object)
(-> (-> Object (Error Top)) ListVector (Error Top))
(do e.Monad<Error>
[tag (ListVector::get-field-sexp [//.variant-tag-field] host-object)
flag (ListVector::get-field-sexp [//.variant-flag-field] host-object)
value (ListVector::get-field-sexp [//.variant-value-field] host-object)
value (lux-object (:! Object value))]
(wrap [(|> tag
(:! IntArrayVector)
(IntArrayVector::getElementAsInt [0])
(Long::intValue []))
(: Top
(if (host.instance? Null flag)
(host.null)
//.unit))
value])))
(def: (parse-int host-object)
(-> ListVector (Error Int))
(do e.Monad<Error>
[high (ListVector::get-field-sexp [//.int-high-field] host-object)
low (ListVector::get-field-sexp [//.int-low-field] host-object)
#let [get-int-32 (|>> (IntArrayVector::getElementAsInt [0]) (:! Nat))
high (get-int-32 (:! IntArrayVector high))
low (get-int-32 (:! IntArrayVector low))]]
(wrap (:! Int
(n/+ (|> high (bit.shift-left +32))
(if (i/< 0 (:! Int low))
(|> low (bit.shift-left +32) (bit.shift-right +32))
low))))))
(def: (lux-object host-object)
(-> Object (Error Top))
(cond (host.instance? StringArrayVector host-object)
(#e.Success (StringArrayVector::getElementAsString [0] (:! StringArrayVector host-object)))
(host.instance? LogicalArrayVector host-object)
(#e.Success (i/= 1 (LogicalArrayVector::getElementAsRawLogical [0] (:! LogicalArrayVector host-object))))
(host.instance? IntArrayVector host-object)
(#e.Success (IntArrayVector::getElementAsInt [0] (:! IntArrayVector host-object)))
(host.instance? DoubleArrayVector host-object)
(#e.Success (DoubleArrayVector::getElementAsDouble [0] (:! DoubleArrayVector host-object)))
(host.instance? ListVector host-object)
(case (parse-int (:! ListVector host-object))
(#e.Error error)
(case (parse-variant lux-object (:! ListVector host-object))
(#e.Error error)
(parse-tuple lux-object (:! ListVector host-object))
output
output)
output
output)
## else
(let [object-class (:! Text (Object::toString [] (Object::getClass [] (:! Object host-object))))
text-representation (:! Text (Object::toString [] (:! Object host-object)))]
(ex.throw Unknown-Kind-Of-Host-Object (format object-class " --- " text-representation)))))
(def: #export (eval code)
(-> Expression (Meta Top))
(function (_ compiler)
(let [interpreter (|> compiler (get@ #.host) (:! //.Host) (get@ #//.interpreter))]
(case (interpreter code)
(#e.Error error)
(exec (log! (format "eval #e.Error\n"
"<< " (r.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"
"<< " (r.expression code) "\n"
error))
((lang.throw Cannot-Evaluate error) compiler)))))))
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