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(.module:
  [lux (#- Type Definition)
   [abstract
    ["." monad (#+ do)]]
   [control
    ["<>" parser
     ["<c>" code (#+ Parser)]
     ["<t>" text]]]
   [data
    ["." product]
    [text
     ["%" format (#+ format)]]
    [collection
     ["." list ("#@." functor fold)]
     ["." dictionary]]]
   [type
    ["." check (#+ Check)]]
   [target
    [jvm
     ["." type (#+ Type Constraint Argument Typed)
      [category (#+ Void Value Return Method Primitive Object Class Array Var Parameter)]
      [".T" lux]
      ["." signature]
      ["." descriptor (#+ Descriptor)]
      ["." parser]]]]
   [tool
    [compiler
     ["." directive (#+ Handler Bundle)]
     ["." phase
      ["." generation]
      [analysis
       [".A" type]]
      ["." extension
       ["." bundle]
       [analysis
        ["." jvm]]
       [directive
        ["/" lux]]]]]]]
  [luxc
   [lang
    [host
     ["$" jvm (#+ Anchor Inst Definition Operation Phase)
      ["_." def]]]]])

(def: signature (|>> type.signature signature.signature))

(type: Declaration
  [Text (List (Type Var))])

(def: declaration
  (Parser Declaration)
  (<c>.form (<>.and <c>.text (<>.some jvm.var))))

(type: Inheritance
  #FinalI
  #AbstractI
  #DefaultI)

(def: inheritance
  (Parser Inheritance)
  ($_ <>.or
      (<c>.text! "final")
      (<c>.text! "abstract")
      (<c>.text! "default")))

(type: State
  #VolatileS
  #FinalS
  #DefaultS)

(def: state
  (Parser State)
  ($_ <>.or
      (<c>.text! "volatile")
      (<c>.text! "final")
      (<c>.text! "default")))

(type: Annotation Any)

(def: annotation
  (Parser Annotation)
  <c>.any)

(def: field-type
  (Parser (Type Value))
  (<t>.embed parser.value <c>.text))

(type: Constant
  [Text (List Annotation) (Type Value) Code])

(def: constant
  (Parser Constant)
  (<| <c>.form
      (<>.after (<c>.text! "constant"))
      ($_ <>.and
          <c>.text
          (<c>.tuple (<>.some ..annotation))
          ..field-type
          <c>.any
          )))

(type: Variable
  [Text jvm.Visibility State (List Annotation) (Type Value)])

(def: variable
  (Parser Variable)
  (<| <c>.form
      (<>.after (<c>.text! "variable"))
      ($_ <>.and
          <c>.text
          jvm.visibility
          ..state
          (<c>.tuple (<>.some ..annotation))
          ..field-type
          )))

(type: Field
  (#Constant Constant)
  (#Variable Variable))

(def: field
  (Parser Field)
  ($_ <>.or
      ..constant
      ..variable
      ))

(type: Method-Definition
  (#Constructor (jvm.Constructor Code))
  (#Virtual-Method (jvm.Virtual-Method Code))
  (#Static-Method (jvm.Static-Method Code))
  (#Overriden-Method (jvm.Overriden-Method Code)))

(def: method
  (Parser Method-Definition)
  ($_ <>.or
      jvm.constructor-definition
      jvm.virtual-method-definition
      jvm.static-method-definition
      jvm.overriden-method-definition
      ))

(def: (constraint name)
  (-> Text Constraint)
  {#type.name name
   #type.super-class (type.class "java.lang.Object" (list))
   #type.super-interfaces (list)})

(def: jvm::class
  (Handler Anchor Inst Definition)
  (/.custom
   [($_ <>.and
        ..declaration
        jvm.class
        (<c>.tuple (<>.some jvm.class))
        ..inheritance
        (<c>.tuple (<>.some ..annotation))
        (<c>.tuple (<>.some ..field))
        (<c>.tuple (<>.some ..method)))
    (function (_ extension phase
                 [[name parameters]
                  super-class
                  super-interfaces
                  inheritance
                  ## TODO: Handle annotations.
                  annotations
                  fields
                  methods])
      (do phase.monad
        [parameters (directive.lift-analysis
                     (typeA.with-env
                       (jvm.parameter-types parameters)))
         #let [mapping (list@fold (function (_ [parameterJ parameterT] mapping)
                                    (dictionary.put (parser.name parameterJ) parameterT mapping))
                                  luxT.fresh
                                  parameters)
               field-definitions (|> fields
                                     (list@map (function (_ field)
                                                 (case field
                                                   ## TODO: Handle annotations.
                                                   (#Constant [name annotations type value])
                                                   (case value
                                                     (^template [<tag> <field>]
                                                       [_ (<tag> value)]
                                                       (<field> #$.Public ($.++F $.staticF $.finalF) name value))
                                                     ([#.Bit _def.boolean-field]
                                                      [#.Int _def.byte-field]
                                                      [#.Int _def.short-field]
                                                      [#.Int _def.int-field]
                                                      [#.Int _def.long-field]
                                                      [#.Frac _def.float-field]
                                                      [#.Frac _def.double-field]
                                                      [#.Nat _def.char-field]
                                                      [#.Text _def.string-field])

                                                     _
                                                     (undefined))

                                                   ## TODO: Handle annotations.
                                                   (#Variable [name visibility state annotations type])
                                                   (_def.field visibility
                                                               (case state
                                                                 ## TODO: Handle transient & static.
                                                                 #VolatileS $.volatileF
                                                                 #FinalS $.finalF
                                                                 #DefaultS $.noneF)
                                                               name
                                                               type))))
                                     _def.fuse)]
         super-classT (directive.lift-analysis
                       (typeA.with-env
                         (luxT.check (luxT.class mapping) (..signature super-class))))
         super-interfaceT+ (directive.lift-analysis
                            (typeA.with-env
                              (monad.map check.monad
                                         (|>> ..signature (luxT.check (luxT.class mapping)))
                                         super-interfaces)))
         #let [selfT (jvm.inheritance-relationship-type (#.Primitive name (list@map product.right parameters))
                                                        super-classT
                                                        super-interfaceT+)]
         state (extension.lift phase.get-state)
         #let [analyse (get@ [#directive.analysis #directive.phase] state)
               synthesize (get@ [#directive.synthesis #directive.phase] state)
               generate (get@ [#directive.generation #directive.phase] state)]
         methods (monad.map @ (function (_ methodC)
                                (do @
                                  [methodA (directive.lift-analysis
                                            (case methodC
                                              (#Constructor method)
                                              (jvm.analyse-constructor-method analyse selfT mapping method)
                                              
                                              (#Virtual-Method method)
                                              (jvm.analyse-virtual-method analyse selfT mapping method)
                                              
                                              (#Static-Method method)
                                              (jvm.analyse-static-method analyse mapping method)
                                              
                                              (#Overriden-Method method)
                                              (jvm.analyse-overriden-method analyse selfT mapping method)))]
                                  (directive.lift-synthesis
                                   (synthesize methodA))))
                            methods)
         _ (directive.lift-generation
            (generation.save! true ["" name]
                              [name
                               (_def.class #$.V1_6 #$.Public
                                           (case inheritance
                                             #FinalI $.finalC
                                             ## TODO: Handle abstract classes.
                                             #AbstractI (undefined)
                                             #DefaultI $.noneC)
                                           name (list@map (|>> product.left parser.name ..constraint) parameters)
                                           super-class super-interfaces
                                           field-definitions)]))
         #let [_ (log! (format "Class " name))]]
        (wrap directive.no-requirements)))]))

(def: #export bundle
  (Bundle Anchor Inst Definition)
  (<| (bundle.prefix "jvm")
      (|> bundle.empty
          (dictionary.put "class" jvm::class)
          )))