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(;module:
lux
(lux (control monad)
(data text/format
(coll [list]))
[macro #+ Monad<Lux> "Lux/" Monad<Lux>]
[host #+ jvm-import do-to])
(luxc ["&" base]
(lang ["la" analysis]
["ls" synthesis])
["&;" analyser]
["&;" synthesizer]
(generator ["&;" common])))
(jvm-import #long java.lang.Object)
(jvm-import org.objectweb.asm.Opcodes
(#static ANEWARRAY int)
(#static DUP int)
(#static AASTORE int)
(#static ACONST_NULL int)
(#static INVOKESTATIC int))
(jvm-import org.objectweb.asm.MethodVisitor
(visitInsn [int] void)
(visitLdcInsn [Object] void)
(visitTypeInsn [int String] void)
(visitMethodInsn [int String String String boolean] void))
(def: #export (generate-tuple generate members)
(-> (-> ls;Synthesis (Lux Unit)) (List ls;Synthesis) (Lux Unit))
(do Monad<Lux>
[#let [size (list;size members)]
_ (&;assert "Cannot generate tuples with less than 2 elements."
(n.>= +2 size))
visitor &common;get-visitor
#let [_ (do-to visitor
(MethodVisitor.visitLdcInsn [(|> size nat-to-int host;l2i (:! java.lang.Object))])
(MethodVisitor.visitTypeInsn [Opcodes.ANEWARRAY "java/lang/Object"]))]
_ (mapM @ (function [[idx member]]
(do @
[#let [_ (do-to visitor
(MethodVisitor.visitInsn [Opcodes.DUP])
(MethodVisitor.visitLdcInsn [(|> idx nat-to-int host;l2i (:! java.lang.Object))]))]
_ (generate member)
#let [_ (MethodVisitor.visitInsn [Opcodes.AASTORE] visitor)]]
(wrap [])))
(list;enumerate members))]
(wrap [])))
(def: (generate-variant-flag tail? visitor)
(-> Bool MethodVisitor MethodVisitor)
(if tail?
(do-to visitor (MethodVisitor.visitLdcInsn [(:! java.lang.Object "")]))
(do-to visitor (MethodVisitor.visitInsn [Opcodes.ACONST_NULL]))))
(def: #export (generate-variant generate tag tail? member)
(-> (-> ls;Synthesis (Lux Unit)) Nat Bool ls;Synthesis (Lux Unit))
(do Monad<Lux>
[visitor &common;get-visitor
#let [_ (do-to visitor
(MethodVisitor.visitLdcInsn [(|> tag nat-to-int host;l2i (:! java.lang.Object))]))
_ (generate-variant-flag tail? visitor)]
_ (generate member)
#let [_ (do-to visitor
(MethodVisitor.visitMethodInsn [Opcodes.INVOKESTATIC
&common;runtime-class-name
"sum_make" "(ILjava/lang/Object;Ljava/lang/Object;)[Ljava/lang/Object;"
false]))]]
(wrap [])))
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