Binary Predicate Binary Predicate Category: functors Component type: concept Description A Binary Predicate is a Binary Function whose result represents the truth or falsehood of some condition. A Binary Predicate might, for example, be a function that takes two arguments and tests whether they are equal. Refinement of Binary Function Associated types Result type The type returned when the Binary Predicate is called. The result type must be convertible to bool. Notation F A type that is a model of Binary Predicate X The first argument type of F Y The second argument type of F f Object of type F x Object of type X y Object of type Y Valid expressions Name Expression Type requirements Return type Function call f(x,y)   Convertible to bool Expression semantics Name Expression Precondition Semantics Postcondition Function call f(x,y) The ordered pair (x,y) is in the domain of f. Returns true if the condition is satisfied, false if it is not. The result is either true or false. Complexity guarantees Invariants Models bool (*)(int,int) equal_to Notes See also Predicate, Adaptable Predicate, Adaptable Binary Predicate Copyright © 1999 Silicon Graphics, Inc. All Rights Reserved. TrademarkInformation