binary_function<Arg1, Arg2, Result> binary_function<Arg1, Arg2, Result> Category: functors Component type: type Description Binary_function is an empty base class: it contains no member functions or member variables, but only type information. The only reason it exists is to make it more convenient to define types that are models of the concept Adaptable Binary Function. Specifically, any model of Adaptable Binary Function must define nested typedefs. Those typedefs are provided by the base class binary_function. Example struct exponentiate : public binary_function<double, double, double> { double operator()(double x, double y) { return pow(x, y); } }; Definition Defined in the standard header functional, and in the nonstandard backward-compatibility header function.h. Template parameters Parameter Description Default Arg1 The function object's first argument type   Arg2 The function object's second argument type   Result The function object's result type   Model of Assignable, Default Constructible Type requirements Public base classes None. Members Member Where defined Description first_argument_type unary_function See below. second_argument_type unary_function See below. result_type unary_function See below. New members These members are not defined in the Assignable and Default Constructible requirements, but are specific to unary_function. Member Description first_argument_type The function object's first argument type. This is a typedef for the template parameter Arg1. second_argument_type The function object's second argument type. This is a typedef for the template parameter Arg2. result_type The function object's result type. This is a typedef for the template parameter Result. Notes See also The Function Object overview, Adaptable Binary Function, unary_function Copyright © 1999 Silicon Graphics, Inc. All Rights Reserved. TrademarkInformation