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Represents the union type in a multi-catch.

• JTransformer 4.0: Added

#id: id
the unique ID assigned to this fact.

#rawType: Types
the id of the implicit type of the union. This type is not visible in the source-code (it's the common supertype of all the types in the union).

[#type_1,…]: Types
the ids of all the types in the union.

try {
  ...
} catch (ClassCastException | NullPointerException e) {
  ...
}

tryT(Try, _, _, [], _, [Catch], null),
catchT(Catch, Try, _, Param, _),
paramT(Param, Catch, UnionType, e),
unionTypeT(UnionType, RefToRuntimeException, [RefToClassCastException, RefToNullPointerException]).

ast_node_type_spec(unionTypeT,[
     ast_arg(id,      mult(1,1,no ), id,  [unionTypeT]),
     ast_arg(rawType, mult(1,1,no ), id,  [type_inst]),
     ast_arg(types,   mult(0,*,no ), id,  [type_inst])
]).