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(.using
 [lux "*"
  ["_" test {"+" Test}]
  [abstract
   [monad {"+" do}]]
  [control
   ["[0]" pipe]
   ["[0]" io]
   ["[0]" try]]
  [math
   ["r" random {"+" Random}]]
  [macro
   ["[0]" code]]
  [tool
   [compiler
    [analysis {"+" State+}]
    ["[0]" phase
     [macro {"+" Expander}]
     ["[0]" analysis
      ["[1]/[0]" scope]
      ["[1]/[0]" type]]]]]])

(def: (check_success+ expander state extension params output_type)
  (-> Expander State+ Text (List Code) Type Bit)
  (|> (analysis/scope.with_scope ""
        (analysis/type.with_type output_type
          (analysis.phase expander (` ((~ (code.text extension)) (~+ params))))))
      (phase.result state)
      (pipe.case
        {try.#Success _}
        true

        {try.#Failure _}
        false)))

(def: check
  (Random [Code Type Code])
  (`` ($_ r.either
          (~~ (template [<random> <type> <code>]
                [(do r.monad
                   [value <random>]
                   (in [(` <type>)
                        <type>
                        (<code> value)]))]

                [r.bit {0 #0 "#Bit" {0 #0}} code.bit]
                [r.nat {0 #0 "#I64" {0 #1 {0 #0 "#Nat" {0 #0}} {0 #0}}} code.nat]
                [r.int {0 #0 "#I64" {0 #1 {0 #0 "#Int" {0 #0}} {0 #0}}} code.int]
                [r.rev {0 #0 "#I64" {0 #1 {0 #0 "#Rev" {0 #0}} {0 #0}}} code.rev]
                [r.safe_frac {0 #0 "#Frac" {0 #0}} code.frac]
                [(r.ascii/upper_alpha 5) {0 #0 "#Text" {0 #0}} code.text]
                )))))

(def: .public (spec expander state)
  (-> Expander State+ Test)
  (do r.monad
    [[typeC exprT exprC] ..check
     [other_typeC other_exprT other_exprC] ..check]
    ($_ _.and
        (_.test "lux check"
                (check_success+ expander state "lux check" (list typeC exprC) exprT))
        (_.test "lux coerce"
                (check_success+ expander state "lux coerce" (list typeC other_exprC) exprT))
        )))