Mathematica: Webel ADT pseudo classes: POLICY: Definer functions MUST return the self-declared or injected 'pattern' that determines the unique "ADT-signature" of the defined ADT class.

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This POLICY supports:

Using the universal base ADT definer as an example:


adt$def$ADT[
  class_Symbol,
  $usage_String,
  pattern_,
  isAllSuper:(True|False):False
] := Module[{ ...},
...
  class /: get[pattern] := $$;
  class /: head[pattern] := Head[$$];
...
  pattern
];

adt$def$ADT[MY$ADT$String,
  "An ADT that carries a String",
  MY$ADT$String[$$_String],
  True
]

MY$ADT$String[$$_String]
The unique defining ADT-signature of the ADT pseudo class MY$ADT$String is MY$ADT$String[$$_String].
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