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(.module:
[library
[lux (#- Type)
["." ffi (#+ import:)]
[abstract
["." monad (#+ do)]]
[control
["." exception (#+ exception:)]]
[data
[text
["%" format (#+ format)]]
[collection
["." list]]]
[math
[number
["n" nat]
["i" int]]]
[target
[jvm
["." type (#+ Type)
["." category (#+ Void Value Return Primitive Object Class Array Var Parameter Method)]
["." descriptor (#+ Descriptor)]
["." signature (#+ Signature)]]]]
[tool
[compiler
["." phase]
[meta
[archive (#+ Archive)]]
[language
[lux
[synthesis (#+ Synthesis)]]]]]]]
[luxc
[lang
[host
[jvm (#+ Inst Operation Phase Generator)
["_" inst]]]]]
["." //
["#." runtime]])
(exception: #export (not_a_tuple {size Nat})
(exception.report
["Expected size" ">= 2"]
["Actual size" (%.nat size)]))
(def: #export (tuple generate archive members)
(Generator (List Synthesis))
(do {@ phase.monad}
[#let [size (list.size members)]
_ (phase.assert ..not_a_tuple size
(n.>= 2 size))
membersI (|> members
list.enumeration
(monad.map @ (function (_ [idx member])
(do @
[memberI (generate archive member)]
(wrap (|>> _.DUP
(_.int (.int idx))
memberI
_.AASTORE)))))
(\ @ map _.fuse))]
(wrap (|>> (_.int (.int size))
(_.array //runtime.$Value)
membersI))))
(import: java/lang/Byte
["#::."
(#static MAX_VALUE byte)
(#static MIN_VALUE byte)])
(import: java/lang/Short
["#::."
(#static MAX_VALUE short)
(#static MIN_VALUE short)])
(def: #export (tagI lefts right?)
(-> Nat Bit Inst)
(case (if right?
(.inc lefts)
lefts)
0 _.ICONST_0
1 _.ICONST_1
2 _.ICONST_2
3 _.ICONST_3
4 _.ICONST_4
5 _.ICONST_5
tag (let [tag (.int tag)]
(cond (and (i.>= (java/lang/Byte::MIN_VALUE) tag)
(i.<= (java/lang/Byte::MAX_VALUE) tag))
(_.BIPUSH tag)
(and (i.>= (java/lang/Short::MIN_VALUE) tag)
(i.<= (java/lang/Short::MAX_VALUE) tag))
(_.SIPUSH tag)
## else
(_.int tag)))))
(def: #export leftI _.NULL)
(def: #export rightI (_.string ""))
(def: #export (flagI right?)
(-> Bit Inst)
(if right?
..rightI
..leftI))
(def: #export (variant generate archive [lefts right? member])
(Generator [Nat Bit Synthesis])
(do phase.monad
[memberI (generate archive member)
#let [tagI (..tagI lefts right?)]]
(wrap (|>> tagI
(flagI right?)
memberI
(_.INVOKESTATIC //.$Runtime
"variant_make"
(type.method [(list)
(list //runtime.$Tag //runtime.$Flag //runtime.$Value)
//.$Variant
(list)]))))))
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