Agent problems

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The following feature expects as its formal argument an agent: 

foo (f: FUNCTION [A, TUPLE [B], C])

By giving its formal argument a type, a feature specifies what it expects of the actual arguments. Feature foo expects the passed agent to:

  • refer to a feature of a descendant of class A.
  • have at least one open argument. The type of it needs to be a descendant of class B.
  • refer to a feature with a return type that is a descendant of class B.
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