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(.module:
  lux
  (lux (control monad
                ["ex" exception #+ exception:])
       (data text/format
             [product])
       [macro]
       (lang [type]
             (type ["tc" check])))
  (luxc ["&" lang]
        (lang analysis)))

(exception: #export (Variant-Tag-Out-Of-Bounds {message Text})
  message)

(def: #export (variant-out-of-bounds-error type size tag)
  (All [a] (-> Type Nat Nat (Meta a)))
  (&.throw Variant-Tag-Out-Of-Bounds
           (format "         Tag: " (%n tag) "\n"
                   "Variant Size: " (%n size) "\n"
                   "Variant Type: " (%type type))))