<functional>

Library:  General utilities

Header

• Local Index
• Summary
• Synopsis
• See Also
• Standards Conformance

The header <functional> is part of the General utilities library of the Standard C++ Library. It defines a number of function objects, helper function templates, and function adapters that are important for the effective use of the library.

namespace std {
  template <class Arg, class Result> 
  struct unary_function;
  template <class Arg1, class Arg2, class Result> 
  struct binary_function;

  template <class T> struct plus;
  template <class T> struct minus;
  template <class T> struct multiplies;
  template <class T> struct divides;
  template <class T> struct modulus;
  template <class T> struct negate;

  template <class T> struct equal_to;
  template <class T> struct not_equal_to;
  template <class T> struct greater;
  template <class T> struct less;
  template <class T> struct greater_equal;
  template <class T> struct less_equal;

  template <class T> struct logical_and;
  template <class T> struct logical_or;
  template <class T> struct logical_not;

  template <class Predicate> struct unary_negate;
  template <class Predicate>
  unary_negate<Predicate>  not1(const Predicate&);
  template <class Predicate> struct binary_negate;
  template <class Predicate>
  binary_negate<Predicate> not2(const Predicate&);

  template <class Operation>  class binder1st;
  template <class Operation, class T>
  binder1st<Operation> bind1st(const Operation&, const T&);
  template <class Operation> class binder2nd;
  template <class Operation, class T>
  binder2nd<Operation> bind2nd(const Operation&, const T&);

  template <class Arg, class Result> 
  class pointer_to_unary_function;
  template <class Arg, class Result>
  pointer_to_unary_function<Arg, Result> 
  ptr_fun(Result (*)(Arg));
  template <class Arg1, class Arg2, class Result>
  class pointer_to_binary_function;
  template <class Arg1, class Arg2, class Result>
  pointer_to_binary_function<Arg1, Arg2, Result>
  ptr_fun(Result (*)(Arg1, Arg2));

  template<class S, class T> class mem_fun_t;
  template<class S, class T, class A> class mem_fun1_t;
  template<class S, class T>
  mem_fun_t<S, T> mem_fun(S (T::*)());
  template<class S, class T, class A>
  mem_fun1_t<S, T, A> mem_fun(S (T::*)(A));
  template<class S, class T> class mem_fun_ref_t;
  template<class S, class T, class A> class mem_fun1_ref_t;
  template<class S, class T>
  mem_fun_ref_t<S, T> mem_fun_ref(S (T::*)());
  template<class S, class T, class A>
  mem_fun1_ref_t<S, T, A> mem_fun_ref(S (T::*)(A));

  template <class S, class T> class const_mem_fun_t;
  template <class S, class T, class A> class const_mem_fun1_t;
  template <class S, class T>
  const_mem_fun_t<S, T> mem_fun(S (T::*)() const);
  template <class S, class T, class A>
  const_mem_fun1_t<S, T, A> mem_fun(S (T::*)(A) const);
  template <class S, class T> class const_mem_fun_ref_t;
  template <class S, class T, class A> 
  class const_mem_fun1_ref_t;
  template <class S, class T>
  const_mem_fun_ref_t<S, T> mem_fun_ref(S (T::*)() const);
  template <class S, class T, class A>
  const_mem_fun1_ref_t<S, T, A> mem_fun_ref(S (T::*)(A)
                                const);
}

binary_function, unary_function, plus, minus, multiplies, divides, modulus, negate, equal_to, not_equal_to, greater, less, greater_equal, less_equal, logical_and, logical_or, logical_not, Negators, unary_negate, not1(), binary_negate, not2(), bind1st(), bind2nd(), binder1st, binder2nd, pointer_to_unary_function, ptr_fun(), pointer_to_binary_function, mem_fun, mem_fun_ref

ISO/IEC 14882:1998 -- International Standard for Information Systems --Programming Language C++, Section 20.3