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(.module:
  [lux #*
   [abstract
    ["." monad (#+ do)]]
   [control
    ["." function]
    ["<>" parser
     ["<s>" synthesis (#+ Parser)]]]
   [data
    [collection
     ["." dictionary]
     ["." list]]
    [text
     ["%" format (#+ format)]]]
   [target
    ["_" php (#+ Var Expression)]]]
  ["." // #_
   ["#." common (#+ custom)]
   ["//#" /// #_
    ["/" bundle]
    ["/#" // #_
     ["." extension]
     [generation
      [extension (#+ Nullary Unary Binary Trinary
                     nullary unary binary trinary)]
      ["." reference]
      ["//" php #_
       ["#." runtime (#+ Operation Phase Handler Bundle
                         with_vars)]]]
     ["/#" // #_
      ["." generation]
      ["//#" /// #_
       ["#." phase]]]]]])

(def: (array::new size)
  (Unary Expression)
  (//runtime.tuple//make size (_.array_fill/3 [(_.int +0) size _.null])))

(def: (array::read [indexG arrayG])
  (Binary Expression)
  (_.nth indexG arrayG))

(def: (array::write [indexG valueG arrayG])
  (Trinary Expression)
  (//runtime.array//write indexG valueG arrayG))

(def: (array::delete [indexG arrayG])
  (Binary Expression)
  (//runtime.array//write indexG _.null arrayG))

(def: array
  Bundle
  (<| (/.prefix "array")
      (|> /.empty
          (/.install "new" (unary array::new))
          (/.install "length" (unary //runtime.array//length))
          (/.install "read" (binary array::read))
          (/.install "write" (trinary array::write))
          (/.install "delete" (binary array::delete))
          )))

(def: object::get
  Handler
  (custom
   [($_ <>.and <s>.text <s>.any)
    (function (_ extension phase archive [fieldS objectS])
      (do ////////phase.monad
        [objectG (phase archive objectS)]
        (wrap (_.the fieldS objectG))))]))

(def: object::do
  Handler
  (custom
   [($_ <>.and <s>.text <s>.any (<>.some <s>.any))
    (function (_ extension phase archive [methodS objectS inputsS])
      (do {! ////////phase.monad}
        [objectG (phase archive objectS)
         inputsG (monad.map ! (phase archive) inputsS)]
        (wrap (_.do methodS inputsG objectG))))]))

(template [<!> <?> <unit>]
  [(def: <!> (Nullary Expression) (function.constant <unit>))
   (def: <?> (Unary Expression) (_.=== <unit>))]

  [object::null object::null? _.null]
  )

(def: object
  Bundle
  (<| (/.prefix "object")
      (|> /.empty
          (/.install "get" object::get)
          (/.install "do" object::do)
          (/.install "null" (nullary object::null))
          (/.install "null?" (unary object::null?))
          )))

(def: php::constant
  (custom
   [<s>.text
    (function (_ extension phase archive name)
      (\ ////////phase.monad wrap (_.constant name)))]))

(def: php::apply
  (custom
   [($_ <>.and <s>.any (<>.some <s>.any))
    (function (_ extension phase archive [abstractionS inputsS])
      (do {! ////////phase.monad}
        [abstractionG (phase archive abstractionS)
         inputsG (monad.map ! (phase archive) inputsS)]
        (wrap (_.apply/* inputsG abstractionG))))]))

(def: php::pack
  (custom
   [($_ <>.and <s>.any <s>.any)
    (function (_ extension phase archive [formatS dataS])
      (do {! ////////phase.monad}
        [formatG (phase archive formatS)
         dataG (phase archive dataS)]
        (wrap (_.pack/2 [formatG (_.splat dataG)]))))]))

(def: #export bundle
  Bundle
  (<| (/.prefix "php")
      (|> /.empty
          (dictionary.merge ..array)
          (dictionary.merge ..object)

          (/.install "constant" php::constant)
          (/.install "apply" php::apply)
          (/.install "pack" php::pack)
          (/.install "script universe" (nullary (function.constant (_.bool reference.universe))))
          )))