path: root/new-luxc/source/luxc/analyser/procedure/host.jvm.lux

(;module:
  [lux #- char]
  (lux (control [monad #+ do]
                ["p" parser]
                ["ex" exception #+ exception:])
       (concurrency ["A" atom])
       (data ["R" result]
             [maybe]
             [product]
             [text "text/" Eq<Text>]
             (text format
                   ["l" lexer])
             (coll [list "list/" Fold<List> Functor<List>]
                   [array #+ Array]
                   [dict #+ Dict]))
       [macro "lux/" Monad<Lux>]
       [type]
       (type ["tc" check])
       [host])
  (luxc ["&" base]
        ["&;" host]
        (lang ["la" analysis])
        (analyser ["&;" common]))
  ["@" ../common]
  )

(def: #export null-class Text "#Null")

(do-template [<name> <class>]
  [(def: #export <name> Type (#;Host <class> (list)))]

  ## Boxes
  [Boolean   "java.lang.Boolean"]
  [Byte      "java.lang.Byte"]
  [Short     "java.lang.Short"]
  [Integer   "java.lang.Integer"]
  [Long      "java.lang.Long"]
  [Float     "java.lang.Float"]
  [Double    "java.lang.Double"]
  [Character "java.lang.Character"]
  [String    "java.lang.String"]

  ## Primitives
  [boolean   "boolean"]
  [byte      "byte"]
  [short     "short"]
  [int       "int"]
  [long      "long"]
  [float     "float"]
  [double    "double"]
  [char      "char"]
  )

(def: conversion-procs
  @;Bundle
  (<| (@;prefix "convert")
      (|> (dict;new text;Hash<Text>)
          (@;install "double-to-float" (@;unary Double Float))
          (@;install "double-to-int" (@;unary Double Integer))
          (@;install "double-to-long" (@;unary Double Long))
          (@;install "float-to-double" (@;unary Float Double))
          (@;install "float-to-int" (@;unary Float Integer))
          (@;install "float-to-long" (@;unary Float Long))
          (@;install "int-to-byte" (@;unary Integer Byte))
          (@;install "int-to-char" (@;unary Integer Character))
          (@;install "int-to-double" (@;unary Integer Double))
          (@;install "int-to-float" (@;unary Integer Float))
          (@;install "int-to-long" (@;unary Integer Long))
          (@;install "int-to-short" (@;unary Integer Short))
          (@;install "long-to-double" (@;unary Long Double))
          (@;install "long-to-float" (@;unary Long Float))
          (@;install "long-to-int" (@;unary Long Integer))
          (@;install "long-to-short" (@;unary Long Short))
          (@;install "long-to-byte" (@;unary Long Byte))
          (@;install "char-to-byte" (@;unary Character Byte))
          (@;install "char-to-short" (@;unary Character Short))
          (@;install "char-to-int" (@;unary Character Integer))
          (@;install "char-to-long" (@;unary Character Long))
          (@;install "byte-to-long" (@;unary Byte Long))
          (@;install "short-to-long" (@;unary Short Long))
          )))

(do-template [<name> <prefix> <type>]
  [(def: <name>
     @;Bundle
     (<| (@;prefix <prefix>)
         (|> (dict;new text;Hash<Text>)
             (@;install "+" (@;binary <type> <type> <type>))
             (@;install "-" (@;binary <type> <type> <type>))
             (@;install "*" (@;binary <type> <type> <type>))
             (@;install "/" (@;binary <type> <type> <type>))
             (@;install "%" (@;binary <type> <type> <type>))
             (@;install "=" (@;binary <type> <type> Boolean))
             (@;install "<" (@;binary <type> <type> Boolean))
             (@;install "and" (@;binary <type> <type> <type>))
             (@;install "or" (@;binary <type> <type> <type>))
             (@;install "xor" (@;binary <type> <type> <type>))
             (@;install "shl" (@;binary <type> Integer <type>))
             (@;install "shr" (@;binary <type> Integer <type>))
             (@;install "ushr" (@;binary <type> Integer <type>))
             )))]

  [int-procs  "int"  Integer]
  [long-procs "long" Long]
  )

(do-template [<name> <prefix> <type>]
  [(def: <name>
     @;Bundle
     (<| (@;prefix <prefix>)
         (|> (dict;new text;Hash<Text>)
             (@;install "+" (@;binary <type> <type> <type>))
             (@;install "-" (@;binary <type> <type> <type>))
             (@;install "*" (@;binary <type> <type> <type>))
             (@;install "/" (@;binary <type> <type> <type>))
             (@;install "%" (@;binary <type> <type> <type>))
             (@;install "=" (@;binary <type> <type> Boolean))
             (@;install "<" (@;binary <type> <type> Boolean))
             )))]

  [float-procs  "float"  Float]
  [double-procs "double" Double]
  )

(def: char-procs
  @;Bundle
  (<| (@;prefix "char")
      (|> (dict;new text;Hash<Text>)
          (@;install "=" (@;binary Character Character Boolean))
          (@;install "<" (@;binary Character Character Boolean))
          )))

(def: #export boxes
  (Dict Text Text)
  (|> (list ["boolean" "java.lang.Boolean"]
            ["byte" "java.lang.Byte"]
            ["short" "java.lang.Short"]
            ["int" "java.lang.Integer"]
            ["long" "java.lang.Long"]
            ["float" "java.lang.Float"]
            ["double" "java.lang.Double"]
            ["char" "java.lang.Character"])
      (dict;from-list text;Hash<Text>)))

(def: (array-length proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list arrayC))
          (do macro;Monad<Lux>
            [arrayA (&;with-expected-type (type (Array varT))
                      (analyse arrayC))
             _ (&;infer Nat)]
            (wrap (#la;Procedure proc (list arrayA))))

          _
          (&;fail (@;wrong-arity proc +1 (list;size args))))))))

(def: (invalid-array-type arrayT)
  (-> Type Text)
  (format "Invalid type for array: " (%type arrayT)))

(def: (array-new proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list lengthC))
      (do macro;Monad<Lux>
        [lengthA (&;with-expected-type Nat
                   (analyse lengthC))
         expectedT macro;expected-type
         [level elem-class] (: (Lux [Nat Text])
                               (loop [analysisT expectedT
                                      level +0]
                                 (case analysisT
                                   (#;Apply inputT funcT)
                                   (case (type;apply (list inputT) funcT)
                                     (#;Some outputT)
                                     (recur outputT level)

                                     #;None
                                     (&;fail (invalid-array-type expectedT)))

                                   (^ (#;Host "#Array" (list elemT)))
                                   (recur elemT (n.inc level))

                                   (#;Host class _)
                                   (wrap [level class])
                                   
                                   _
                                   (&;fail (invalid-array-type expectedT)))))
         _ (&;assert "Must have at least 1 level of nesting in array type."
                     (n.> +0 level))]
        (wrap (#la;Procedure proc (list (#la;Nat (n.dec level)) (#la;Text elem-class) lengthA))))

      _
      (&;fail (@;wrong-arity proc +1 (list;size args))))))

(def: (not-object type)
  (-> Type Text)
  (format "Non-object type: " (%type type)))

(def: (check-jvm objectT)
  (-> Type (Lux Text))
  (case objectT
    (#;Host name _)
    (lux/wrap name)

    (#;Named name unnamed)
    (check-jvm unnamed)

    (^template [<tag>]
      (<tag> env unquantified)
      (check-jvm unquantified))
    ([#;UnivQ]
     [#;ExQ])

    (#;Apply inputT funcT)
    (case (type;apply (list inputT) funcT)
      (#;Some outputT)
      (check-jvm outputT)

      #;None
      (&;fail (not-object objectT)))

    _
    (&;fail (not-object objectT))))

(def: (check-object objectT)
  (-> Type (Lux Text))
  (do macro;Monad<Lux>
    [name (check-jvm objectT)]
    (if (dict;contains? name boxes)
      (&;fail (format "Primitives are not objects: " name))
      (:: macro;Monad<Lux> wrap name))))

(def: (box-array-element-type elemT)
  (-> Type (Lux [Type Text]))
  (do macro;Monad<Lux>
    []
    (case elemT
      (#;Host name #;Nil)
      (let [boxed-name (|> (dict;get name boxes)
                           (maybe;default name))]
        (wrap [(#;Host boxed-name #;Nil)
               boxed-name]))

      (#;Host name _)
      (if (dict;contains? name boxes)
        (&;fail (format "Primitives cannot be parameterized: " name))
        (:: macro;Monad<Lux> wrap [elemT name]))

      _
      (&;fail (format "Invalid type for array element: " (%type elemT))))))

(def: (array-read proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list arrayC idxC))
          (do macro;Monad<Lux>
            [arrayA (&;with-expected-type (type (Array varT))
                      (analyse arrayC))
             elemT (&;with-type-env
                     (tc;read var-id))
             [elemT elem-class] (box-array-element-type elemT)
             idxA (&;with-expected-type Nat
                    (analyse idxC))
             _ (&;infer elemT)]
            (wrap (#la;Procedure proc (list (#la;Text elem-class) idxA arrayA))))

          _
          (&;fail (@;wrong-arity proc +2 (list;size args))))))))

(def: (array-write proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list arrayC idxC valueC))
          (do macro;Monad<Lux>
            [arrayA (&;with-expected-type (type (Array varT))
                      (analyse arrayC))
             elemT (&;with-type-env
                     (tc;read var-id))
             [valueT elem-class] (box-array-element-type elemT)
             idxA (&;with-expected-type Nat
                    (analyse idxC))
             valueA (&;with-expected-type valueT
                      (analyse valueC))
             _ (&;infer (type (Array elemT)))]
            (wrap (#la;Procedure proc (list (#la;Text elem-class) idxA valueA arrayA))))

          _
          (&;fail (@;wrong-arity proc +3 (list;size args))))))))

(def: array-procs
  @;Bundle
  (<| (@;prefix "array")
      (|> (dict;new text;Hash<Text>)
          (@;install "length" array-length)
          (@;install "new" array-new)
          (@;install "read" array-read)
          (@;install "write" array-write)
          )))

(def: (object-null proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list))
      (do macro;Monad<Lux>
        [expectedT macro;expected-type
         _ (check-object expectedT)]
        (wrap (#la;Procedure proc (list))))

      _
      (&;fail (@;wrong-arity proc +0 (list;size args))))))

(def: (object-null? proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list objectC))
          (do macro;Monad<Lux>
            [objectA (&;with-expected-type varT
                       (analyse objectC))
             objectT (&;with-type-env
                       (tc;read var-id))
             _ (check-object objectT)
             _ (&;infer Bool)]
            (wrap (#la;Procedure proc (list objectA))))

          _
          (&;fail (@;wrong-arity proc +1 (list;size args))))))))

(def: (object-synchronized proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list monitorC exprC))
          (do macro;Monad<Lux>
            [monitorA (&;with-expected-type varT
                        (analyse monitorC))
             monitorT (&;with-type-env
                        (tc;read var-id))
             _ (check-object monitorT)
             exprA (analyse exprC)]
            (wrap (#la;Procedure proc (list monitorA exprA))))

          _
          (&;fail (@;wrong-arity proc +2 (list;size args))))))))

(host;import java.lang.Object)

(host;import java.lang.ClassLoader)

(host;import #long java.lang.reflect.Type
  (getTypeName [] String))

(host;import java.lang.reflect.GenericArrayType
  (getGenericComponentType [] java.lang.reflect.Type))

(host;import java.lang.reflect.ParameterizedType
  (getRawType [] java.lang.reflect.Type)
  (getActualTypeArguments [] (Array java.lang.reflect.Type)))

(host;import (java.lang.reflect.TypeVariable d)
  (getName [] String)
  (getBounds [] (Array java.lang.reflect.Type)))

(host;import (java.lang.reflect.WildcardType d)
  (getLowerBounds [] (Array java.lang.reflect.Type))
  (getUpperBounds [] (Array java.lang.reflect.Type)))

(host;import java.lang.reflect.Modifier
  (#static isStatic [int] boolean)
  (#static isFinal [int] boolean))

(host;import java.lang.reflect.Field
  (getDeclaringClass [] (java.lang.Class Object))
  (getModifiers [] int)
  (getGenericType [] java.lang.reflect.Type))

(host;import (java.lang.Class c)
  (getName [] String)
  (#static forName [String boolean ClassLoader] #try (Class Object))
  (isAssignableFrom [(Class Object)] boolean)
  (getTypeParameters [] (Array (TypeVariable (Class c))))
  (getGenericInterfaces [] (Array java.lang.reflect.Type))
  (getGenericSuperclass [] java.lang.reflect.Type)
  (getDeclaredField [String] #try Field))

(def: (load-class name)
  (-> Text (Lux (Class Object)))
  (do macro;Monad<Lux>
    [class-loader &host;class-loader]
    (case (Class.forName [name false class-loader])
      (#R;Success [class])
      (wrap class)

      (#R;Error error)
      (&;fail (format "Unknown class: " name)))))

(def: (sub-class? super sub)
  (-> Text Text (Lux Bool))
  (do macro;Monad<Lux>
    [super (load-class super)
     sub (load-class sub)]
    (wrap (Class.isAssignableFrom [sub] super))))

(exception: #export Not-Throwable)

(def: (object-throw proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list exceptionC))
          (do macro;Monad<Lux>
            [exceptionA (&;with-expected-type varT
                          (analyse exceptionC))
             exceptionT (&;with-type-env
                          (tc;read var-id))
             exception-class (check-object exceptionT)
             ? (sub-class? "java.lang.Throwable" exception-class)
             _ (: (Lux Unit)
                  (if ?
                    (wrap [])
                    (&;throw Not-Throwable exception-class)))
             _ (&;infer Bottom)]
            (wrap (#la;Procedure proc (list exceptionA))))

          _
          (&;fail (@;wrong-arity proc +1 (list;size args))))))))

(def: (object-class proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list classC))
      (case classC
        [_ (#;Text class)]
        (do macro;Monad<Lux>
          [_ (load-class class)
           _ (&;infer (#;Host "java.lang.Class" (list (#;Host class (list)))))]
          (wrap (#la;Procedure proc (list (#la;Text class)))))

        _
        (&;fail (format "Wrong syntax for '" proc "'.")))

      _
      (&;fail (@;wrong-arity proc +1 (list;size args))))))

(exception: #export Cannot-Be-Instance)

(def: (object-instance? proc)
  (-> Text @;Proc)
  (function [analyse args]
    (&common;with-var
      (function [[var-id varT]]
        (case args
          (^ (list classC objectC))
          (case classC
            [_ (#;Text class)]
            (do macro;Monad<Lux>
              [objectA (&;with-expected-type varT
                         (analyse objectC))
               objectT (&;with-type-env
                         (tc;read var-id))
               object-class (check-object objectT)
               ? (sub-class? class object-class)]
              (if ?
                (do @
                  [_ (&;infer Bool)]
                  (wrap (#la;Procedure proc (list (#la;Text class)))))
                (&;throw Cannot-Be-Instance (format object-class " !<= "  class))))

            _
            (&;fail (format "Wrong syntax for '" proc "'.")))

          _
          (&;fail (@;wrong-arity proc +2 (list;size args))))))))

(def: object-procs
  @;Bundle
  (<| (@;prefix "object")
      (|> (dict;new text;Hash<Text>)
          (@;install "null" object-null)
          (@;install "null?" object-null?)
          (@;install "synchronized" object-synchronized)
          (@;install "throw" object-throw)
          (@;install "class" object-class)
          (@;install "instance?" object-instance?)
          )))

(exception: #export Final-Field)

(exception: #export Cannot-Convert-To-Class)
(exception: #export Cannot-Convert-To-Lux-Type)
(exception: #export Cannot-Cast-To-Primitive)
(exception: #export JVM-Type-Is-Not-Class)

(def: type-descriptor
  (-> java.lang.reflect.Type Text)
  (java.lang.reflect.Type.getTypeName []))

(def: (java-type-to-class type)
  (-> java.lang.reflect.Type (Lux Text))
  (cond (host;instance? Class type)
        (lux/wrap (Class.getName [] (:! Class type)))

        (host;instance? ParameterizedType type)
        (java-type-to-class (ParameterizedType.getRawType [] (:! ParameterizedType type)))

        ## else
        (&;throw Cannot-Convert-To-Class (type-descriptor type))))

(exception: #export Unknown-Type-Var)

(type: Mappings
  (Dict Text Type))

(def: fresh-mappings Mappings (dict;new text;Hash<Text>))

(def: (java-type-to-lux-type mappings java-type)
  (-> Mappings java.lang.reflect.Type (Lux Type))
  (cond (host;instance? TypeVariable java-type)
        (let [var-name (TypeVariable.getName [] (:! TypeVariable java-type))]
          (case (dict;get var-name mappings)
            (#;Some var-type)
            (lux/wrap var-type)
            
            #;None
            (&;throw Unknown-Type-Var var-name)))

        (host;instance? WildcardType java-type)
        (let [java-type (:! WildcardType java-type)]
          (case [(array;get +0 (WildcardType.getUpperBounds [] java-type))
                 (array;get +0 (WildcardType.getLowerBounds [] java-type))]
            (^or [(#;Some bound) _] [_ (#;Some bound)])
            (java-type-to-lux-type mappings bound)
            
            _
            (lux/wrap Top)))

        (host;instance? Class java-type)
        (let [java-type (:! (Class Object) java-type)
              class-name (Class.getName [] java-type)]
          (lux/wrap (case (array;size (Class.getTypeParameters [] java-type))
                      +0
                      (#;Host class-name (list))
                      
                      arity
                      (|> (list;n.range +0 (n.dec arity))
                          list;reverse
                          (list/map (|>. (n.* +2) n.inc #;Bound))
                          (#;Host class-name)
                          (type;univ-q arity)))))

        (host;instance? ParameterizedType java-type)
        (let [java-type (:! ParameterizedType java-type)
              raw (ParameterizedType.getRawType [] java-type)]
          (if (host;instance? Class raw)
            (do macro;Monad<Lux>
              [paramsT (|> java-type
                           (ParameterizedType.getActualTypeArguments [])
                           array;to-list
                           (monad;map @ (java-type-to-lux-type mappings)))]
              (lux/wrap (#;Host (Class.getName [] (:! (Class Object) raw))
                                paramsT)))
            (&;throw JVM-Type-Is-Not-Class (type-descriptor raw))))

        (host;instance? GenericArrayType java-type)
        (do macro;Monad<Lux>
          [innerT (|> (:! GenericArrayType java-type)
                      (GenericArrayType.getGenericComponentType [])
                      (java-type-to-lux-type mappings))]
          (wrap (#;Host "#Array" (list innerT))))

        ## else
        (&;throw Cannot-Convert-To-Lux-Type (type-descriptor java-type))))

(type: Direction
  #In
  #Out)

(def: (choose direction to from)
  (-> Direction Text Text Text)
  (case direction
    #In to
    #Out from))

(def: (cast direction to from)
  (-> Direction Type Type (Lux [Text Type]))
  (do macro;Monad<Lux>
    [to-name (check-jvm to)
     from-name (check-jvm from)]
    (cond (dict;contains? to-name boxes)
          (let [box (maybe;assume (dict;get to-name boxes))]
            (if (text/= box from-name)
              (wrap [(choose direction to-name from-name) (#;Host to-name (list))])
              (&;throw Cannot-Cast-To-Primitive (format from-name " => " to-name))))

          (dict;contains? from-name boxes)
          (let [box (maybe;assume (dict;get from-name boxes))]
            (do @
              [[_ castT] (cast direction to (#;Host box (list)))]
              (wrap [(choose direction to-name from-name) castT])))

          (text/= to-name from-name)
          (wrap [(choose direction to-name from-name) from])

          (text/= null-class from-name)
          (wrap [(choose direction to-name from-name) to])

          ## else
          (do @
            [to-class (load-class to-name)
             from-class (load-class from-name)
             _ (&;assert (format "Class '" from-name "' is not a sub-class of class '" to-name "'.")
                         (Class.isAssignableFrom [from-class] to-class))
             candiate-parents (monad;map @
                                         (function [java-type]
                                           (do @
                                             [class-name (java-type-to-class java-type)
                                              class (load-class class-name)]
                                             (wrap [java-type (Class.isAssignableFrom [from-class] to-class)])))
                                         (list& (Class.getGenericSuperclass [] from-class)
                                                (array;to-list (Class.getGenericInterfaces [] from-class))))]
            (case (|> candiate-parents
                      (list;filter product;right)
                      (list/map product;left))
              (#;Cons parent _)
              (do @
                [parentT (java-type-to-lux-type fresh-mappings parent)
                 [_ castT] (cast direction to parentT)]
                (wrap [(choose direction to-name from-name) castT]))

              #;Nil
              (&;fail (format "No valid path between " (%type from) "and " (%type to) ".")))))))

(def: (find-field class-name field-name)
  (-> Text Text (Lux [(Class Object) Field]))
  (do macro;Monad<Lux>
    [class (load-class class-name)]
    (case (Class.getDeclaredField [field-name] class)
      (#R;Success field)
      (let [owner (Field.getDeclaringClass [] field)]
        (if (is owner class)
          (wrap [class field])
          (&;fail (format "Field '" field-name "' does not belong to class '" class-name "'.\n"
                          "Belongs to '" (Class.getName [] owner) "'."))))

      (#R;Error _)
      (&;fail (format "Unknown field '" field-name "' for class '" class-name "'.")))))

(def: (static-field class-name field-name)
  (-> Text Text (Lux [Type Bool]))
  (do macro;Monad<Lux>
    [[class fieldJ] (find-field class-name field-name)
     #let [modifiers (Field.getModifiers [] fieldJ)]]
    (if (Modifier.isStatic [modifiers])
      (let [fieldJT (Field.getGenericType [] fieldJ)]
        (do @
          [fieldT (java-type-to-lux-type fresh-mappings fieldJT)]
          (wrap [fieldT (Modifier.isFinal [modifiers])])))
      (&;fail (format "Field '" field-name "' of class '" class-name "' is not static.")))))

(exception: #export Non-Object-Type)

(def: (virtual-field class-name field-name objectT)
  (-> Text Text Type (Lux [Type Bool]))
  (do macro;Monad<Lux>
    [[class fieldJ] (find-field class-name field-name)
     #let [modifiers (Field.getModifiers [] fieldJ)]]
    (if (not (Modifier.isStatic [modifiers]))
      (do @
        [#let [fieldJT (Field.getGenericType [] fieldJ)
               var-names (|> class
                             (Class.getTypeParameters [])
                             array;to-list
                             (list/map (TypeVariable.getName [])))]
         mappings (: (Lux Mappings)
                     (case objectT
                       (#;Host _class-name _class-params)
                       (do @
                         [#let [num-params (list;size _class-params)
                                num-vars (list;size var-names)]
                          _ (&;assert (format "Number of paremeters in type does not match expected amount (" (%n num-vars) "): " (%type objectT))
                                      (n.= num-params num-vars))]
                         (wrap (|> (list;zip2 var-names _class-params)
                                   (dict;from-list text;Hash<Text>))))

                       _
                       (&;throw Non-Object-Type (%type objectT))))
         fieldT (java-type-to-lux-type mappings fieldJT)]
        (wrap [fieldT (Modifier.isFinal [modifiers])]))
      (&;fail (format "Field '" field-name "' of class '" class-name "' is static.")))))

(def: (analyse-object class analyse sourceC)
  (-> Text &;Analyser Code (Lux [Type la;Analysis]))
  (<| &common;with-var (function [[var-id varT]])
      (do macro;Monad<Lux>
        [target-class (load-class class)
         targetT (java-type-to-lux-type fresh-mappings
                                        (:! java.lang.reflect.Type
                                            target-class))
         sourceA (&;with-expected-type varT
                   (analyse sourceC))
         sourceT (&;with-type-env
                   (tc;read var-id))
         [unboxed castT] (cast #Out targetT sourceT)
         _ (&;assert (format "Object cannot be a primitive: " unboxed)
                     (not (dict;contains? unboxed boxes)))]
        (wrap [castT sourceA]))))

(def: (analyse-input analyse targetT sourceC)
  (-> &;Analyser Type Code (Lux [Type Text la;Analysis]))
  (<| &common;with-var (function [[var-id varT]])
      (do macro;Monad<Lux>
        [sourceA (&;with-expected-type varT
                   (analyse sourceC))
         sourceT (&;with-type-env
                   (tc;read var-id))
         [unboxed castT] (cast #In targetT sourceT)]
        (wrap [castT unboxed sourceA]))))

(def: (static-get proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list classC fieldC))
      (case [classC fieldC]
        [[_ (#;Text class)] [_ (#;Text field)]]
        (do macro;Monad<Lux>
          [[fieldT final?] (static-field class field)
           expectedT macro;expected-type
           [unboxed castT] (cast #Out expectedT fieldT)
           _ (&;with-type-env
               (tc;check expectedT castT))]
          (wrap (#la;Procedure proc (list (#la;Text class) (#la;Text field) (#la;Text unboxed)))))

        _
        (&;fail (format "Wrong syntax for '" proc "'.")))

      _
      (&;fail (@;wrong-arity proc +2 (list;size args))))))

(def: (static-put proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list classC fieldC valueC))
      (case [classC fieldC]
        [[_ (#;Text class)] [_ (#;Text field)]]
        (do macro;Monad<Lux>
          [[fieldT final?] (static-field class field)
           _ (&;assert (Final-Field (format class "#" field))
                       (not final?))
           [valueT unboxed valueA] (analyse-input analyse fieldT valueC)
           _ (&;with-type-env
               (tc;check fieldT valueT))
           _ (&;infer Unit)]
          (wrap (#la;Procedure proc (list (#la;Text class) (#la;Text field) (#la;Text unboxed) valueA))))

        _
        (&;fail (format "Wrong syntax for '" proc "'.")))

      _
      (&;fail (@;wrong-arity proc +3 (list;size args))))))

(def: (virtual-get proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list classC fieldC objectC))
      (case [classC fieldC]
        [[_ (#;Text class)] [_ (#;Text field)]]
        (do macro;Monad<Lux>
          [[objectT objectA] (analyse-object class analyse objectC)
           [fieldT final?] (virtual-field class field objectT)
           expectedT macro;expected-type
           [unboxed castT] (cast #Out expectedT fieldT)
           _ (&;with-type-env
               (tc;check expectedT castT))]
          (wrap (#la;Procedure proc (list (#la;Text class) (#la;Text field) (#la;Text unboxed) objectA))))

        _
        (&;fail (format "Wrong syntax for '" proc "'.")))

      _
      (&;fail (@;wrong-arity proc +3 (list;size args))))))

(def: (virtual-put proc)
  (-> Text @;Proc)
  (function [analyse args]
    (case args
      (^ (list classC fieldC valueC objectC))
      (case [classC fieldC]
        [[_ (#;Text class)] [_ (#;Text field)]]
        (do macro;Monad<Lux>
          [[objectT objectA] (analyse-object class analyse objectC)
           [fieldT final?] (virtual-field class field objectT)
           _ (&;assert (Final-Field (format class "#" field))
                       (not final?))
           [valueT unboxed valueA] (analyse-input analyse fieldT valueC)
           _ (&;with-type-env
               (tc;check fieldT valueT))
           _ (&;infer Unit)]
          (wrap (#la;Procedure proc (list (#la;Text class) (#la;Text field) (#la;Text unboxed) valueA objectA))))

        _
        (&;fail (format "Wrong syntax for '" proc "'.")))

      _
      (&;fail (@;wrong-arity proc +4 (list;size args))))))

(def: member-procs
  @;Bundle
  (<| (@;prefix "member")
      (|> (dict;new text;Hash<Text>)
          (dict;merge (<| (@;prefix "static")
                          (|> (dict;new text;Hash<Text>)
                              (@;install "get" static-get)
                              (@;install "put" static-put))))
          (dict;merge (<| (@;prefix "virtual")
                          (|> (dict;new text;Hash<Text>)
                              (@;install "get" virtual-get)
                              (@;install "put" virtual-put))))
          )))

(def: #export procedures
  @;Bundle
  (<| (@;prefix "jvm")
      (|> (dict;new text;Hash<Text>)
          (dict;merge conversion-procs)
          (dict;merge int-procs)
          (dict;merge long-procs)
          (dict;merge float-procs)
          (dict;merge double-procs)
          (dict;merge char-procs)
          (dict;merge array-procs)
          (dict;merge object-procs)
          (dict;merge member-procs)
          )))