Standard C++ LibraryCopyright 1996, Rogue Wave Software, Inc.

NAME

  pointer_to_unary_function  - A function object class that adapts a pointer
  to a function to work where a unary_function is called for.

SYNOPSIS

  #include <functional>

  template <class Arg, class Result>
  class pointer_to_unary_function : public unary_function<Arg, Result>;

DESCRIPTION

  The pointer_to_unary_function class encapsulates a pointer to a single-
  argument function.  The class provides an operator() so that the resulting
  object serves as a function object for that function.

  The ptr_fun function is overloaded to create instances of
  pointer_to_unary_function when provided with the appropriate pointer to a
  function.

INTERFACE

  template <class Arg, class Result>
  class pointer_to_unary_function : public unary_function<Arg, Result> {

  public:
    typedef typename unary_function<Arg,Result>::argument_type
                                                 argument_type;
    typedef typename unary_function<Arg,Result>::result_type
                                                 result_type;
    explicit pointer_to_unary_function (Result (*f)(Arg));
    Result operator() (const Arg&) const;
  };

  template<class Arg, class Result>
  pointer_to_unary_function<Arg, Result>
   ptr_fun (Result (*f)(Arg));

SEE ALSO

  function_objects, pointer_to_binary_function, ptr_fun, unary_function

STANDARDS CONFORMANCE

  ANSI X3J16/ISO WG21 Joint C++ Committee



privacy and legal statement