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(.module:
[lux #*
[control
["." monad (#+ do)]
["ex" exception (#+ exception:)]]
[data
[text
format]
[collection
["." list]]]
[compiler
[default
["." phase
[synthesis (#+ Synthesis)]]]]]
[luxc
[lang
[host
["." jvm (#+ Inst Operation Phase)
["$t" type]
["_" inst]]]]]
["." //])
(exception: #export (not-a-tuple {size Nat})
(ex.report ["Expected size" ">= 2"]
["Actual size" (%n size)]))
(def: $Object jvm.Type ($t.class "java.lang.Object" (list)))
(def: #export (tuple translate members)
(-> Phase (List Synthesis) (Operation Inst))
(do phase.Monad<Operation>
[#let [size (list.size members)]
_ (phase.assert not-a-tuple size
(n/>= +2 size))
membersI (|> members
list.enumerate
(monad.map @ (function (_ [idx member])
(do @
[memberI (translate member)]
(wrap (|>> _.DUP
(_.int (.int idx))
memberI
_.AASTORE)))))
(:: @ map _.fuse))]
(wrap (|>> (_.int (.int size))
(_.array $Object)
membersI))))
(def: (flagI tail?)
(-> Bit Inst)
(if tail?
(_.string "")
_.NULL))
(def: #export (variant translate tag tail? member)
(-> Phase Nat Bit Synthesis (Operation Inst))
(do phase.Monad<Operation>
[memberI (translate member)]
(wrap (|>> (_.int (.int tag))
(flagI tail?)
memberI
(_.INVOKESTATIC //.runtime-class
"variant_make"
($t.method (list $t.int $Object $Object)
(#.Some ($t.array +1 $Object))
(list))
#0)))))
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