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(.module:
  [library
   [lux "*"
    [abstract
     [equivalence {"+" [Equivalence]}]]
    [control
     ["[0]" try]]
    [data
     [format
      [binary {"+" [Writer]}]]]
    [type
     abstract]]]
  ["[0]" /// "_"
   [encoding
    ["[1][0]" unsigned {"+" [U1]} ("u1//[0]" equivalence)]]])

(abstract: .public Tag
  U1

  [(implementation: .public equivalence
     (Equivalence Tag)
     (def: (= reference sample)
       (u1//= (:representation reference)
              (:representation sample))))

   (template [<code> <name>]
     [(def: .public <name>
        Tag
        (|> <code> ///unsigned.u1 try.trusted :abstraction))]

     [01 utf8]
     [03 integer]
     [04 float]
     [05 long]
     [06 double]
     [07 class]
     [08 string]
     [09 field]
     [10 method]
     [11 interface_method]
     [12 name_and_type]
     [15 method_handle]
     [16 method_type]
     [18 invoke_dynamic]
     )

   (def: .public writer
     (Writer Tag)
     (|>> :representation ///unsigned.writer/1))]
  )