Extracted from Pike v7.4 release 341 at 2005-11-21.
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predef::
ADT
ADT.Relation
ADT.Relation.Binary

Method ADT.Relation.Binary()->`()()


Method `()

mixed `()(mixed left, mixed right)

Description

Does the same as the contains function: returns true if the relation "left R right " exists, and otherwise false.