Using pragma foreign_type for Erlang - The Mercury Language Reference Manual

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14.9.4.1 Using pragma foreign_type for Erlang

An Erlang ‘pragma foreign_type’ declaration has the form:

     :- pragma foreign_type("Erlang", MercuryTypeName, "").

The effect of this declaration is that Mercury values of type MercuryTypeName will be passed to and from Erlang foreign_procs as having some representation unknown to Mercury.