Standard C++	Library
 		 Copyright 1996, Rogue Wave Software, Inc.

 NAME

   binary_negate	 - Function object that	returns	the complement of the
   result of its binary	predicate

 SYNOPSIS

   #include <functional>

   template<class Predicate>
   class	binary_negate ;

 DESCRIPTION

   binary_negate	is a function object class that	provides a return type
   for the function adaptor not2.  not2 is a function adaptor, known
   as a negator, that takes a binary predicate function object as its
   argument and returns a binary predicate function object that is the
   complement of the original.

   Note that not2 works only with function objects that are defined as
   subclasses of the class binary_function.

 INTERFACE

   template<class Predicate>
   class	binary_negate
     : public binary_function<typename
 			   predicate::first_argument_type,
 			   typename
 			   Predicate::second_argument_type,
 			   bool>
   {
   public:

    typedef typename binary_function<typename
     Predicate::first_argument_type, typename
     Predicate::second_argument_type, bool>::second_argument_type
 					     second_argument_type;
    typedef typename binary_function<typename
     Predicate::first_argument_type, typename
     Predicate::second_argument_type, bool>::first_argument_type
 					    first_argument_type;
    typedef typename binary_function<typename
     Predicate::first_argument_type, typename
     Predicate::second_argument_type, bool>::result_type
 					    result_type;

    explicit binary_negate (const Predicate&);
    bool	operator() (const first_argument_type&,
 		    const second_argument_type&) const;
   };

   // Non-member	Functions

   template <class Predicate>
   binary_negate<Predicate> not2	(const Predicate& pred);

 CONSTRUCTOR

   explicit binary_negate(const Predicate& pred);
      Construct a binary_negate object from predicate pred.

 OPERATOR

   bool
   operator()(const first_argument_type&	x,
 	    const second_argument_type&	y) const;
 	       Return the result of pred(x,y)

 SEE ALSO

   binary_function, not2, unary_negate

 STANDARDS CONFORMANCE
   ANSI X3J16/ISO WG21 Joint C++	Committee