// Functor implementations -*- C++ -*-
-// Copyright (C) 2001, 2002 Free Software Foundation, Inc.
+// Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2009
+// Free Software Foundation, Inc.
//
// This file is part of the GNU ISO C++ Library. This library is free
// software; you can redistribute it and/or modify it under the
// terms of the GNU General Public License as published by the
-// Free Software Foundation; either version 2, or (at your option)
+// Free Software Foundation; either version 3, or (at your option)
// any later version.
// This library is distributed in the hope that it will be useful,
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU General Public License for more details.
-// You should have received a copy of the GNU General Public License along
-// with this library; see the file COPYING. If not, write to the Free
-// Software Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
-// USA.
+// Under Section 7 of GPL version 3, you are granted additional
+// permissions described in the GCC Runtime Library Exception, version
+// 3.1, as published by the Free Software Foundation.
-// As a special exception, you may use this file as part of a free software
-// library without restriction. Specifically, if other files instantiate
-// templates or use macros or inline functions from this file, or you compile
-// this file and link it with other files to produce an executable, this
-// file does not by itself cause the resulting executable to be covered by
-// the GNU General Public License. This exception does not however
-// invalidate any other reasons why the executable file might be covered by
-// the GNU General Public License.
+// You should have received a copy of the GNU General Public License and
+// a copy of the GCC Runtime Library Exception along with this program;
+// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
+// <http://www.gnu.org/licenses/>.
/*
*
* You should not attempt to use it directly.
*/
-#ifndef __GLIBCPP_INTERNAL_FUNCTION_H
-#define __GLIBCPP_INTERNAL_FUNCTION_H
-
-namespace std
-{
-// 20.3.1 base classes
-/** @defgroup s20_3_1_base Functor Base Classes
- * Function objects, or @e functors, are objects with an @c operator()
- * defined and accessible. They can be passed as arguments to algorithm
- * templates and used in place of a function pointer. Not only is the
- * resulting expressiveness of the library increased, but the generated
- * code can be more efficient than what you might write by hand. When we
- * refer to "functors," then, generally we include function pointers in
- * the description as well.
- *
- * Often, functors are only created as temporaries passed to algorithm
- * calls, rather than being created as named variables.
- *
- * Two examples taken from the standard itself follow. To perform a
- * by-element addition of two vectors @c a and @c b containing @c double,
- * and put the result in @c a, use
- * \code
- * transform (a.begin(), a.end(), b.begin(), a.begin(), plus<double>());
- * \endcode
- * To negate every element in @c a, use
- * \code
- * transform(a.begin(), a.end(), a.begin(), negate<double>());
- * \endcode
- * The addition and negation functions will be inlined directly.
- *
- * The standard functiors are derived from structs named @c unary_function
- * and @c binary_function. These two classes contain nothing but typedefs,
- * to aid in generic (template) programming. If you write your own
- * functors, you might consider doing the same.
- *
- * @{
-*/
-/**
- * This is one of the @link s20_3_1_base functor base classes@endlink.
-*/
-template <class _Arg, class _Result>
-struct unary_function {
- typedef _Arg argument_type; ///< @c argument_type is the type of the argument (no surprises here)
- typedef _Result result_type; ///< @c result_type is the return type
-};
-
-/**
- * This is one of the @link s20_3_1_base functor base classes@endlink.
-*/
-template <class _Arg1, class _Arg2, class _Result>
-struct binary_function {
- typedef _Arg1 first_argument_type; ///< the type of the first argument (no surprises here)
- typedef _Arg2 second_argument_type; ///< the type of the second argument
- typedef _Result result_type; ///< type of the return type
-};
-/** @} */
-
-// 20.3.2 arithmetic
-/** @defgroup s20_3_2_arithmetic Arithmetic Classes
- * Because basic math often needs to be done during an algorithm, the library
- * provides functors for those operations. See the documentation for
- * @link s20_3_1_base the base classes@endlink for examples of their use.
- *
- * @{
-*/
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct plus : public binary_function<_Tp,_Tp,_Tp> {
- _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x + __y; }
-};
-
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct minus : public binary_function<_Tp,_Tp,_Tp> {
- _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x - __y; }
-};
-
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct multiplies : public binary_function<_Tp,_Tp,_Tp> {
- _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x * __y; }
-};
-
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct divides : public binary_function<_Tp,_Tp,_Tp> {
- _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x / __y; }
-};
-
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct modulus : public binary_function<_Tp,_Tp,_Tp>
-{
- _Tp operator()(const _Tp& __x, const _Tp& __y) const { return __x % __y; }
-};
-
-/// One of the @link s20_3_2_arithmetic math functors@endlink.
-template <class _Tp>
-struct negate : public unary_function<_Tp,_Tp>
-{
- _Tp operator()(const _Tp& __x) const { return -__x; }
-};
-/** @} */
-
-// 20.3.3 comparisons
-/** @defgroup s20_3_3_comparisons Comparison Classes
- * The library provides six wrapper functors for all the basic comparisons
- * in C++, like @c <.
- *
- * @{
-*/
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct equal_to : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x == __y; }
-};
-
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct not_equal_to : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x != __y; }
-};
-
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct greater : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x > __y; }
-};
-
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct less : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x < __y; }
-};
-
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct greater_equal : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x >= __y; }
-};
-
-/// One of the @link s20_3_3_comparisons comparison functors@endlink.
-template <class _Tp>
-struct less_equal : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x <= __y; }
-};
-/** @} */
-
-// 20.3.4 logical operations
-/** @defgroup s20_3_4_logical Boolean Operations Classes
- * Here are wrapper functors for Boolean operations: @c &&, @c ||, and @c !.
- *
- * @{
-*/
-/// One of the @link s20_3_4_logical Boolean operations functors@endlink.
-template <class _Tp>
-struct logical_and : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x && __y; }
-};
-
-/// One of the @link s20_3_4_logical Boolean operations functors@endlink.
-template <class _Tp>
-struct logical_or : public binary_function<_Tp,_Tp,bool>
-{
- bool operator()(const _Tp& __x, const _Tp& __y) const { return __x || __y; }
-};
-
-/// One of the @link s20_3_4_logical Boolean operations functors@endlink.
-template <class _Tp>
-struct logical_not : public unary_function<_Tp,bool>
-{
- bool operator()(const _Tp& __x) const { return !__x; }
-};
-/** @} */
-
-// 20.3.5 negators
-/** @defgroup s20_3_5_negators Negators
- * The functions @c not1 and @c not2 each take a predicate functor
- * and return an instance of @c unary_negate or
- * @c binary_negate, respectively. These classes are functors whose
- * @c operator() performs the stored predicate function and then returns
- * the negation of the result.
- *
- * For example, given a vector of integers and a trivial predicate,
- * \code
- * struct IntGreaterThanThree
- * : public std::unary_function<int, bool>
- * {
- * bool operator() (int x) { return x > 3; }
- * };
- *
- * std::find_if (v.begin(), v.end(), not1(IntGreaterThanThree()));
- * \endcode
- * The call to @c find_if will locate the first index (i) of @c v for which
- * "!(v[i] > 3)" is true.
- *
- * The not1/unary_negate combination works on predicates taking a single
- * argument. The not2/binary_negate combination works on predicates which
- * take two arguments.
- *
- * @{
-*/
-/// One of the @link s20_3_5_negators negation functors@endlink.
-template <class _Predicate>
-class unary_negate
- : public unary_function<typename _Predicate::argument_type, bool> {
-protected:
- _Predicate _M_pred;
-public:
- explicit unary_negate(const _Predicate& __x) : _M_pred(__x) {}
- bool operator()(const typename _Predicate::argument_type& __x) const {
- return !_M_pred(__x);
- }
-};
-
-/// One of the @link s20_3_5_negators negation functors@endlink.
-template <class _Predicate>
-inline unary_negate<_Predicate>
-not1(const _Predicate& __pred)
-{
- return unary_negate<_Predicate>(__pred);
-}
-
-/// One of the @link s20_3_5_negators negation functors@endlink.
-template <class _Predicate>
-class binary_negate
- : public binary_function<typename _Predicate::first_argument_type,
- typename _Predicate::second_argument_type,
- bool> {
-protected:
- _Predicate _M_pred;
-public:
- explicit binary_negate(const _Predicate& __x) : _M_pred(__x) {}
- bool operator()(const typename _Predicate::first_argument_type& __x,
- const typename _Predicate::second_argument_type& __y) const
- {
- return !_M_pred(__x, __y);
- }
-};
-
-/// One of the @link s20_3_5_negators negation functors@endlink.
-template <class _Predicate>
-inline binary_negate<_Predicate>
-not2(const _Predicate& __pred)
-{
- return binary_negate<_Predicate>(__pred);
-}
-/** @} */
-
-// 20.3.6 binders
-/** @defgroup s20_3_6_binder Binder Classes
- * Binders turn functions/functors with two arguments into functors with
- * a single argument, storing an argument to be applied later. For
- * example, an variable @c B of type @c binder1st is constructed from a functor
- * @c f and an argument @c x. Later, B's @c operator() is called with a
- * single argument @c y. The return value is the value of @c f(x,y).
- * @c B can be "called" with various arguments (y1, y2, ...) and will in
- * turn call @c f(x,y1), @c f(x,y2), ...
- *
- * The function @c bind1st is provided to save some typing. It takes the
- * function and an argument as parameters, and returns an instance of
- * @c binder1st.
- *
- * The type @c binder2nd and its creator function @c bind2nd do the same
- * thing, but the stored argument is passed as the second parameter instead
- * of the first, e.g., @c bind2nd(std::minus<float>,1.3) will create a
- * functor whose @c operator() accepts a floating-point number, subtracts
- * 1.3 from it, and returns the result. (If @c bind1st had been used,
- * the functor would perform "1.3 - x" instead.
- *
- * Creator-wrapper functions like @c bind1st are intended to be used in
- * calling algorithms. Their return values will be temporary objects.
- * (The goal is to not require you to type names like
- * @c std::binder1st<std::plus<int>> for declaring a variable to hold the
- * return value from @c bind1st(std::plus<int>,5).
- *
- * These become more useful when combined with the composition functions.
- *
- * @{
-*/
-/// One of the @link s20_3_6_binder binder functors@endlink.
-template <class _Operation>
-class binder1st
- : public unary_function<typename _Operation::second_argument_type,
- typename _Operation::result_type> {
-protected:
- _Operation op;
- typename _Operation::first_argument_type value;
-public:
- binder1st(const _Operation& __x,
- const typename _Operation::first_argument_type& __y)
- : op(__x), value(__y) {}
- typename _Operation::result_type
- operator()(const typename _Operation::second_argument_type& __x) const {
- return op(value, __x);
- }
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- //109. Missing binders for non-const sequence elements
- typename _Operation::result_type
- operator()(typename _Operation::second_argument_type& __x) const {
- return op(value, __x);
- }
+#ifndef _STL_FUNCTION_H
+#define _STL_FUNCTION_H 1
+
+_GLIBCXX_BEGIN_NAMESPACE(std)
+
+ // 20.3.1 base classes
+ /** @defgroup functors Function Objects
+ * @ingroup utilities
+ *
+ * Function objects, or @e functors, are objects with an @c operator()
+ * defined and accessible. They can be passed as arguments to algorithm
+ * templates and used in place of a function pointer. Not only is the
+ * resulting expressiveness of the library increased, but the generated
+ * code can be more efficient than what you might write by hand. When we
+ * refer to "functors," then, generally we include function pointers in
+ * the description as well.
+ *
+ * Often, functors are only created as temporaries passed to algorithm
+ * calls, rather than being created as named variables.
+ *
+ * Two examples taken from the standard itself follow. To perform a
+ * by-element addition of two vectors @c a and @c b containing @c double,
+ * and put the result in @c a, use
+ * \code
+ * transform (a.begin(), a.end(), b.begin(), a.begin(), plus<double>());
+ * \endcode
+ * To negate every element in @c a, use
+ * \code
+ * transform(a.begin(), a.end(), a.begin(), negate<double>());
+ * \endcode
+ * The addition and negation functions will be inlined directly.
+ *
+ * The standard functors are derived from structs named @c unary_function
+ * and @c binary_function. These two classes contain nothing but typedefs,
+ * to aid in generic (template) programming. If you write your own
+ * functors, you might consider doing the same.
+ *
+ * @{
+ */
+ /**
+ * This is one of the @link functors functor base classes@endlink.
+ */
+ template<typename _Arg, typename _Result>
+ struct unary_function
+ {
+ typedef _Arg argument_type; ///< @c argument_type is the type of the
+ /// argument (no surprises here)
+
+ typedef _Result result_type; ///< @c result_type is the return type
+ };
+
+ /**
+ * This is one of the @link functors functor base classes@endlink.
+ */
+ template<typename _Arg1, typename _Arg2, typename _Result>
+ struct binary_function
+ {
+ typedef _Arg1 first_argument_type; ///< the type of the first argument
+ /// (no surprises here)
+
+ typedef _Arg2 second_argument_type; ///< the type of the second argument
+ typedef _Result result_type; ///< type of the return type
+ };
+ /** @} */
+
+ // 20.3.2 arithmetic
+ /** @defgroup arithmetic_functors Arithmetic Classes
+ * @ingroup functors
+ *
+ * Because basic math often needs to be done during an algorithm,
+ * the library provides functors for those operations. See the
+ * documentation for @link functors the base classes@endlink
+ * for examples of their use.
+ *
+ * @{
+ */
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct plus : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x + __y; }
+ };
+
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct minus : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x - __y; }
+ };
+
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct multiplies : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x * __y; }
+ };
+
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct divides : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x / __y; }
+ };
+
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct modulus : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x % __y; }
+ };
+
+ /// One of the @link arithmetic_functors math functors@endlink.
+ template<typename _Tp>
+ struct negate : public unary_function<_Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x) const
+ { return -__x; }
+ };
+ /** @} */
+
+ // 20.3.3 comparisons
+ /** @defgroup comparison_functors Comparison Classes
+ * @ingroup functors
+ *
+ * The library provides six wrapper functors for all the basic comparisons
+ * in C++, like @c <.
+ *
+ * @{
+ */
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct equal_to : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x == __y; }
+ };
+
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct not_equal_to : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x != __y; }
+ };
+
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct greater : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x > __y; }
+ };
+
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct less : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x < __y; }
+ };
+
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct greater_equal : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x >= __y; }
+ };
+
+ /// One of the @link comparison_functors comparison functors@endlink.
+ template<typename _Tp>
+ struct less_equal : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x <= __y; }
+ };
+ /** @} */
+
+ // 20.3.4 logical operations
+ /** @defgroup logical_functors Boolean Operations Classes
+ * @ingroup functors
+ *
+ * Here are wrapper functors for Boolean operations: @c &&, @c ||,
+ * and @c !.
+ *
+ * @{
+ */
+ /// One of the @link logical_functors Boolean operations functors@endlink.
+ template<typename _Tp>
+ struct logical_and : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x && __y; }
+ };
+
+ /// One of the @link logical_functors Boolean operations functors@endlink.
+ template<typename _Tp>
+ struct logical_or : public binary_function<_Tp, _Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x || __y; }
+ };
+
+ /// One of the @link logical_functors Boolean operations functors@endlink.
+ template<typename _Tp>
+ struct logical_not : public unary_function<_Tp, bool>
+ {
+ bool
+ operator()(const _Tp& __x) const
+ { return !__x; }
+ };
+ /** @} */
+
+ // _GLIBCXX_RESOLVE_LIB_DEFECTS
+ // DR 660. Missing Bitwise Operations.
+ template<typename _Tp>
+ struct bit_and : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x & __y; }
+ };
+
+ template<typename _Tp>
+ struct bit_or : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x | __y; }
+ };
+
+ template<typename _Tp>
+ struct bit_xor : public binary_function<_Tp, _Tp, _Tp>
+ {
+ _Tp
+ operator()(const _Tp& __x, const _Tp& __y) const
+ { return __x ^ __y; }
+ };
+
+ // 20.3.5 negators
+ /** @defgroup negators Negators
+ * @ingroup functors
+ *
+ * The functions @c not1 and @c not2 each take a predicate functor
+ * and return an instance of @c unary_negate or
+ * @c binary_negate, respectively. These classes are functors whose
+ * @c operator() performs the stored predicate function and then returns
+ * the negation of the result.
+ *
+ * For example, given a vector of integers and a trivial predicate,
+ * \code
+ * struct IntGreaterThanThree
+ * : public std::unary_function<int, bool>
+ * {
+ * bool operator() (int x) { return x > 3; }
+ * };
+ *
+ * std::find_if (v.begin(), v.end(), not1(IntGreaterThanThree()));
+ * \endcode
+ * The call to @c find_if will locate the first index (i) of @c v for which
+ * "!(v[i] > 3)" is true.
+ *
+ * The not1/unary_negate combination works on predicates taking a single
+ * argument. The not2/binary_negate combination works on predicates which
+ * take two arguments.
+ *
+ * @{
+ */
+ /// One of the @link negators negation functors@endlink.
+ template<typename _Predicate>
+ class unary_negate
+ : public unary_function<typename _Predicate::argument_type, bool>
+ {
+ protected:
+ _Predicate _M_pred;
+
+ public:
+ explicit
+ unary_negate(const _Predicate& __x) : _M_pred(__x) { }
+
+ bool
+ operator()(const typename _Predicate::argument_type& __x) const
+ { return !_M_pred(__x); }
+ };
+
+ /// One of the @link negators negation functors@endlink.
+ template<typename _Predicate>
+ inline unary_negate<_Predicate>
+ not1(const _Predicate& __pred)
+ { return unary_negate<_Predicate>(__pred); }
+
+ /// One of the @link negators negation functors@endlink.
+ template<typename _Predicate>
+ class binary_negate
+ : public binary_function<typename _Predicate::first_argument_type,
+ typename _Predicate::second_argument_type, bool>
+ {
+ protected:
+ _Predicate _M_pred;
+
+ public:
+ explicit
+ binary_negate(const _Predicate& __x) : _M_pred(__x) { }
+
+ bool
+ operator()(const typename _Predicate::first_argument_type& __x,
+ const typename _Predicate::second_argument_type& __y) const
+ { return !_M_pred(__x, __y); }
+ };
+
+ /// One of the @link negators negation functors@endlink.
+ template<typename _Predicate>
+ inline binary_negate<_Predicate>
+ not2(const _Predicate& __pred)
+ { return binary_negate<_Predicate>(__pred); }
+ /** @} */
+
+ // 20.3.7 adaptors pointers functions
+ /** @defgroup pointer_adaptors Adaptors for pointers to functions
+ * @ingroup functors
+ *
+ * The advantage of function objects over pointers to functions is that
+ * the objects in the standard library declare nested typedefs describing
+ * their argument and result types with uniform names (e.g., @c result_type
+ * from the base classes @c unary_function and @c binary_function).
+ * Sometimes those typedefs are required, not just optional.
+ *
+ * Adaptors are provided to turn pointers to unary (single-argument) and
+ * binary (double-argument) functions into function objects. The
+ * long-winded functor @c pointer_to_unary_function is constructed with a
+ * function pointer @c f, and its @c operator() called with argument @c x
+ * returns @c f(x). The functor @c pointer_to_binary_function does the same
+ * thing, but with a double-argument @c f and @c operator().
+ *
+ * The function @c ptr_fun takes a pointer-to-function @c f and constructs
+ * an instance of the appropriate functor.
+ *
+ * @{
+ */
+ /// One of the @link pointer_adaptors adaptors for function pointers@endlink.
+ template<typename _Arg, typename _Result>
+ class pointer_to_unary_function : public unary_function<_Arg, _Result>
+ {
+ protected:
+ _Result (*_M_ptr)(_Arg);
+
+ public:
+ pointer_to_unary_function() { }
+
+ explicit
+ pointer_to_unary_function(_Result (*__x)(_Arg))
+ : _M_ptr(__x) { }
+
+ _Result
+ operator()(_Arg __x) const
+ { return _M_ptr(__x); }
+ };
+
+ /// One of the @link pointer_adaptors adaptors for function pointers@endlink.
+ template<typename _Arg, typename _Result>
+ inline pointer_to_unary_function<_Arg, _Result>
+ ptr_fun(_Result (*__x)(_Arg))
+ { return pointer_to_unary_function<_Arg, _Result>(__x); }
+
+ /// One of the @link pointer_adaptors adaptors for function pointers@endlink.
+ template<typename _Arg1, typename _Arg2, typename _Result>
+ class pointer_to_binary_function
+ : public binary_function<_Arg1, _Arg2, _Result>
+ {
+ protected:
+ _Result (*_M_ptr)(_Arg1, _Arg2);
+
+ public:
+ pointer_to_binary_function() { }
+
+ explicit
+ pointer_to_binary_function(_Result (*__x)(_Arg1, _Arg2))
+ : _M_ptr(__x) { }
+
+ _Result
+ operator()(_Arg1 __x, _Arg2 __y) const
+ { return _M_ptr(__x, __y); }
+ };
+
+ /// One of the @link pointer_adaptors adaptors for function pointers@endlink.
+ template<typename _Arg1, typename _Arg2, typename _Result>
+ inline pointer_to_binary_function<_Arg1, _Arg2, _Result>
+ ptr_fun(_Result (*__x)(_Arg1, _Arg2))
+ { return pointer_to_binary_function<_Arg1, _Arg2, _Result>(__x); }
+ /** @} */
+
+ template<typename _Tp>
+ struct _Identity : public unary_function<_Tp,_Tp>
+ {
+ _Tp&
+ operator()(_Tp& __x) const
+ { return __x; }
+
+ const _Tp&
+ operator()(const _Tp& __x) const
+ { return __x; }
+ };
+
+ template<typename _Pair>
+ struct _Select1st : public unary_function<_Pair,
+ typename _Pair::first_type>
+ {
+ typename _Pair::first_type&
+ operator()(_Pair& __x) const
+ { return __x.first; }
+
+ const typename _Pair::first_type&
+ operator()(const _Pair& __x) const
+ { return __x.first; }
+ };
+
+ template<typename _Pair>
+ struct _Select2nd : public unary_function<_Pair,
+ typename _Pair::second_type>
+ {
+ typename _Pair::second_type&
+ operator()(_Pair& __x) const
+ { return __x.second; }
+
+ const typename _Pair::second_type&
+ operator()(const _Pair& __x) const
+ { return __x.second; }
+ };
+
+ // 20.3.8 adaptors pointers members
+ /** @defgroup memory_adaptors Adaptors for pointers to members
+ * @ingroup functors
+ *
+ * There are a total of 8 = 2^3 function objects in this family.
+ * (1) Member functions taking no arguments vs member functions taking
+ * one argument.
+ * (2) Call through pointer vs call through reference.
+ * (3) Const vs non-const member function.
+ *
+ * All of this complexity is in the function objects themselves. You can
+ * ignore it by using the helper function mem_fun and mem_fun_ref,
+ * which create whichever type of adaptor is appropriate.
+ *
+ * @{
+ */
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp>
+ class mem_fun_t : public unary_function<_Tp*, _Ret>
+ {
+ public:
+ explicit
+ mem_fun_t(_Ret (_Tp::*__pf)())
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(_Tp* __p) const
+ { return (__p->*_M_f)(); }
+
+ private:
+ _Ret (_Tp::*_M_f)();
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp>
+ class const_mem_fun_t : public unary_function<const _Tp*, _Ret>
+ {
+ public:
+ explicit
+ const_mem_fun_t(_Ret (_Tp::*__pf)() const)
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(const _Tp* __p) const
+ { return (__p->*_M_f)(); }
+
+ private:
+ _Ret (_Tp::*_M_f)() const;
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp>
+ class mem_fun_ref_t : public unary_function<_Tp, _Ret>
+ {
+ public:
+ explicit
+ mem_fun_ref_t(_Ret (_Tp::*__pf)())
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(_Tp& __r) const
+ { return (__r.*_M_f)(); }
+
+ private:
+ _Ret (_Tp::*_M_f)();
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp>
+ class const_mem_fun_ref_t : public unary_function<_Tp, _Ret>
+ {
+ public:
+ explicit
+ const_mem_fun_ref_t(_Ret (_Tp::*__pf)() const)
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(const _Tp& __r) const
+ { return (__r.*_M_f)(); }
+
+ private:
+ _Ret (_Tp::*_M_f)() const;
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp, typename _Arg>
+ class mem_fun1_t : public binary_function<_Tp*, _Arg, _Ret>
+ {
+ public:
+ explicit
+ mem_fun1_t(_Ret (_Tp::*__pf)(_Arg))
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(_Tp* __p, _Arg __x) const
+ { return (__p->*_M_f)(__x); }
+
+ private:
+ _Ret (_Tp::*_M_f)(_Arg);
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp, typename _Arg>
+ class const_mem_fun1_t : public binary_function<const _Tp*, _Arg, _Ret>
+ {
+ public:
+ explicit
+ const_mem_fun1_t(_Ret (_Tp::*__pf)(_Arg) const)
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(const _Tp* __p, _Arg __x) const
+ { return (__p->*_M_f)(__x); }
+
+ private:
+ _Ret (_Tp::*_M_f)(_Arg) const;
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp, typename _Arg>
+ class mem_fun1_ref_t : public binary_function<_Tp, _Arg, _Ret>
+ {
+ public:
+ explicit
+ mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg))
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(_Tp& __r, _Arg __x) const
+ { return (__r.*_M_f)(__x); }
+
+ private:
+ _Ret (_Tp::*_M_f)(_Arg);
+ };
+
+ /// One of the @link memory_adaptors adaptors for member
+ /// pointers@endlink.
+ template<typename _Ret, typename _Tp, typename _Arg>
+ class const_mem_fun1_ref_t : public binary_function<_Tp, _Arg, _Ret>
+ {
+ public:
+ explicit
+ const_mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg) const)
+ : _M_f(__pf) { }
+
+ _Ret
+ operator()(const _Tp& __r, _Arg __x) const
+ { return (__r.*_M_f)(__x); }
+
+ private:
+ _Ret (_Tp::*_M_f)(_Arg) const;
+ };
+
+ // Mem_fun adaptor helper functions. There are only two:
+ // mem_fun and mem_fun_ref.
+ template<typename _Ret, typename _Tp>
+ inline mem_fun_t<_Ret, _Tp>
+ mem_fun(_Ret (_Tp::*__f)())
+ { return mem_fun_t<_Ret, _Tp>(__f); }
+
+ template<typename _Ret, typename _Tp>
+ inline const_mem_fun_t<_Ret, _Tp>
+ mem_fun(_Ret (_Tp::*__f)() const)
+ { return const_mem_fun_t<_Ret, _Tp>(__f); }
+
+ template<typename _Ret, typename _Tp>
+ inline mem_fun_ref_t<_Ret, _Tp>
+ mem_fun_ref(_Ret (_Tp::*__f)())
+ { return mem_fun_ref_t<_Ret, _Tp>(__f); }
+
+ template<typename _Ret, typename _Tp>
+ inline const_mem_fun_ref_t<_Ret, _Tp>
+ mem_fun_ref(_Ret (_Tp::*__f)() const)
+ { return const_mem_fun_ref_t<_Ret, _Tp>(__f); }
+
+ template<typename _Ret, typename _Tp, typename _Arg>
+ inline mem_fun1_t<_Ret, _Tp, _Arg>
+ mem_fun(_Ret (_Tp::*__f)(_Arg))
+ { return mem_fun1_t<_Ret, _Tp, _Arg>(__f); }
+
+ template<typename _Ret, typename _Tp, typename _Arg>
+ inline const_mem_fun1_t<_Ret, _Tp, _Arg>
+ mem_fun(_Ret (_Tp::*__f)(_Arg) const)
+ { return const_mem_fun1_t<_Ret, _Tp, _Arg>(__f); }
+
+ template<typename _Ret, typename _Tp, typename _Arg>
+ inline mem_fun1_ref_t<_Ret, _Tp, _Arg>
+ mem_fun_ref(_Ret (_Tp::*__f)(_Arg))
+ { return mem_fun1_ref_t<_Ret, _Tp, _Arg>(__f); }
+
+ template<typename _Ret, typename _Tp, typename _Arg>
+ inline const_mem_fun1_ref_t<_Ret, _Tp, _Arg>
+ mem_fun_ref(_Ret (_Tp::*__f)(_Arg) const)
+ { return const_mem_fun1_ref_t<_Ret, _Tp, _Arg>(__f); }
+
+ /** @} */
+
+_GLIBCXX_END_NAMESPACE
+
+#if !defined(__GXX_EXPERIMENTAL_CXX0X__) || _GLIBCXX_DEPRECATED
+# include <backward/binders.h>
#endif
-};
-
-/// One of the @link s20_3_6_binder binder functors@endlink.
-template <class _Operation, class _Tp>
-inline binder1st<_Operation>
-bind1st(const _Operation& __fn, const _Tp& __x)
-{
- typedef typename _Operation::first_argument_type _Arg1_type;
- return binder1st<_Operation>(__fn, _Arg1_type(__x));
-}
-
-/// One of the @link s20_3_6_binder binder functors@endlink.
-template <class _Operation>
-class binder2nd
- : public unary_function<typename _Operation::first_argument_type,
- typename _Operation::result_type> {
-protected:
- _Operation op;
- typename _Operation::second_argument_type value;
-public:
- binder2nd(const _Operation& __x,
- const typename _Operation::second_argument_type& __y)
- : op(__x), value(__y) {}
- typename _Operation::result_type
- operator()(const typename _Operation::first_argument_type& __x) const {
- return op(__x, value);
- }
-#ifdef _GLIBCPP_RESOLVE_LIB_DEFECTS
- //109. Missing binders for non-const sequence elements
- typename _Operation::result_type
- operator()(typename _Operation::first_argument_type& __x) const {
- return op(__x, value);
- }
-#endif
-};
-
-/// One of the @link s20_3_6_binder binder functors@endlink.
-template <class _Operation, class _Tp>
-inline binder2nd<_Operation>
-bind2nd(const _Operation& __fn, const _Tp& __x)
-{
- typedef typename _Operation::second_argument_type _Arg2_type;
- return binder2nd<_Operation>(__fn, _Arg2_type(__x));
-}
-/** @} */
-
-// 20.3.7 adaptors pointers functions
-/** @defgroup s20_3_7_adaptors Adaptors for pointers to functions
- * The advantage of function objects over pointers to functions is that
- * the objects in the standard library declare nested typedefs describing
- * their argument and result types with uniform names (e.g., @c result_type
- * from the base classes @c unary_function and @c binary_function).
- * Sometimes those typedefs are required, not just optional.
- *
- * Adaptors are provided to turn pointers to unary (single-argument) and
- * binary (double-argument) functions into function objects. The long-winded
- * functor @c pointer_to_unary_function is constructed with a function
- * pointer @c f, and its @c operator() called with argument @c x returns
- * @c f(x). The functor @c pointer_to_binary_function does the same thing,
- * but with a double-argument @c f and @c operator().
- *
- * The function @c ptr_fun takes a pointer-to-function @c f and constructs
- * an instance of the appropriate functor.
- *
- * @{
-*/
-/// One of the @link s20_3_7_adaptors adaptors for function pointers@endlink.
-template <class _Arg, class _Result>
-class pointer_to_unary_function : public unary_function<_Arg, _Result> {
-protected:
- _Result (*_M_ptr)(_Arg);
-public:
- pointer_to_unary_function() {}
- explicit pointer_to_unary_function(_Result (*__x)(_Arg)) : _M_ptr(__x) {}
- _Result operator()(_Arg __x) const { return _M_ptr(__x); }
-};
-
-/// One of the @link s20_3_7_adaptors adaptors for function pointers@endlink.
-template <class _Arg, class _Result>
-inline pointer_to_unary_function<_Arg, _Result> ptr_fun(_Result (*__x)(_Arg))
-{
- return pointer_to_unary_function<_Arg, _Result>(__x);
-}
-
-/// One of the @link s20_3_7_adaptors adaptors for function pointers@endlink.
-template <class _Arg1, class _Arg2, class _Result>
-class pointer_to_binary_function :
- public binary_function<_Arg1,_Arg2,_Result> {
-protected:
- _Result (*_M_ptr)(_Arg1, _Arg2);
-public:
- pointer_to_binary_function() {}
- explicit pointer_to_binary_function(_Result (*__x)(_Arg1, _Arg2))
- : _M_ptr(__x) {}
- _Result operator()(_Arg1 __x, _Arg2 __y) const {
- return _M_ptr(__x, __y);
- }
-};
-
-/// One of the @link s20_3_7_adaptors adaptors for function pointers@endlink.
-template <class _Arg1, class _Arg2, class _Result>
-inline pointer_to_binary_function<_Arg1,_Arg2,_Result>
-ptr_fun(_Result (*__x)(_Arg1, _Arg2)) {
- return pointer_to_binary_function<_Arg1,_Arg2,_Result>(__x);
-}
-/** @} */
-
-template <class _Tp>
-struct _Identity : public unary_function<_Tp,_Tp> {
- _Tp& operator()(_Tp& __x) const { return __x; }
- const _Tp& operator()(const _Tp& __x) const { return __x; }
-};
-
-template <class _Pair>
-struct _Select1st : public unary_function<_Pair, typename _Pair::first_type> {
- typename _Pair::first_type& operator()(_Pair& __x) const {
- return __x.first;
- }
- const typename _Pair::first_type& operator()(const _Pair& __x) const {
- return __x.first;
- }
-};
-
-template <class _Pair>
-struct _Select2nd : public unary_function<_Pair, typename _Pair::second_type>
-{
- typename _Pair::second_type& operator()(_Pair& __x) const {
- return __x.second;
- }
- const typename _Pair::second_type& operator()(const _Pair& __x) const {
- return __x.second;
- }
-};
-
-// 20.3.8 adaptors pointers members
-/** @defgroup s20_3_8_memadaptors Adaptors for pointers to members
- * There are a total of 16 = 2^4 function objects in this family.
- * (1) Member functions taking no arguments vs member functions taking
- * one argument.
- * (2) Call through pointer vs call through reference.
- * (3) Member function with void return type vs member function with
- * non-void return type.
- * (4) Const vs non-const member function.
- *
- * Note that choice (3) is nothing more than a workaround: according
- * to the draft, compilers should handle void and non-void the same way.
- * This feature is not yet widely implemented, though. You can only use
- * member functions returning void if your compiler supports partial
- * specialization.
- *
- * All of this complexity is in the function objects themselves. You can
- * ignore it by using the helper function mem_fun and mem_fun_ref,
- * which create whichever type of adaptor is appropriate.
- *
- * @{
-*/
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp>
-class mem_fun_t : public unary_function<_Tp*,_Ret> {
-public:
- explicit mem_fun_t(_Ret (_Tp::*__pf)()) : _M_f(__pf) {}
- _Ret operator()(_Tp* __p) const { return (__p->*_M_f)(); }
-private:
- _Ret (_Tp::*_M_f)();
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp>
-class const_mem_fun_t : public unary_function<const _Tp*,_Ret> {
-public:
- explicit const_mem_fun_t(_Ret (_Tp::*__pf)() const) : _M_f(__pf) {}
- _Ret operator()(const _Tp* __p) const { return (__p->*_M_f)(); }
-private:
- _Ret (_Tp::*_M_f)() const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp>
-class mem_fun_ref_t : public unary_function<_Tp,_Ret> {
-public:
- explicit mem_fun_ref_t(_Ret (_Tp::*__pf)()) : _M_f(__pf) {}
- _Ret operator()(_Tp& __r) const { return (__r.*_M_f)(); }
-private:
- _Ret (_Tp::*_M_f)();
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp>
-class const_mem_fun_ref_t : public unary_function<_Tp,_Ret> {
-public:
- explicit const_mem_fun_ref_t(_Ret (_Tp::*__pf)() const) : _M_f(__pf) {}
- _Ret operator()(const _Tp& __r) const { return (__r.*_M_f)(); }
-private:
- _Ret (_Tp::*_M_f)() const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp, class _Arg>
-class mem_fun1_t : public binary_function<_Tp*,_Arg,_Ret> {
-public:
- explicit mem_fun1_t(_Ret (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
- _Ret operator()(_Tp* __p, _Arg __x) const { return (__p->*_M_f)(__x); }
-private:
- _Ret (_Tp::*_M_f)(_Arg);
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp, class _Arg>
-class const_mem_fun1_t : public binary_function<const _Tp*,_Arg,_Ret> {
-public:
- explicit const_mem_fun1_t(_Ret (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
- _Ret operator()(const _Tp* __p, _Arg __x) const
- { return (__p->*_M_f)(__x); }
-private:
- _Ret (_Tp::*_M_f)(_Arg) const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp, class _Arg>
-class mem_fun1_ref_t : public binary_function<_Tp,_Arg,_Ret> {
-public:
- explicit mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
- _Ret operator()(_Tp& __r, _Arg __x) const { return (__r.*_M_f)(__x); }
-private:
- _Ret (_Tp::*_M_f)(_Arg);
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Ret, class _Tp, class _Arg>
-class const_mem_fun1_ref_t : public binary_function<_Tp,_Arg,_Ret> {
-public:
- explicit const_mem_fun1_ref_t(_Ret (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
- _Ret operator()(const _Tp& __r, _Arg __x) const { return (__r.*_M_f)(__x); }
-private:
- _Ret (_Tp::*_M_f)(_Arg) const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp>
-class mem_fun_t<void, _Tp> : public unary_function<_Tp*,void> {
-public:
- explicit mem_fun_t(void (_Tp::*__pf)()) : _M_f(__pf) {}
- void operator()(_Tp* __p) const { (__p->*_M_f)(); }
-private:
- void (_Tp::*_M_f)();
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp>
-class const_mem_fun_t<void, _Tp> : public unary_function<const _Tp*,void> {
-public:
- explicit const_mem_fun_t(void (_Tp::*__pf)() const) : _M_f(__pf) {}
- void operator()(const _Tp* __p) const { (__p->*_M_f)(); }
-private:
- void (_Tp::*_M_f)() const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp>
-class mem_fun_ref_t<void, _Tp> : public unary_function<_Tp,void> {
-public:
- explicit mem_fun_ref_t(void (_Tp::*__pf)()) : _M_f(__pf) {}
- void operator()(_Tp& __r) const { (__r.*_M_f)(); }
-private:
- void (_Tp::*_M_f)();
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp>
-class const_mem_fun_ref_t<void, _Tp> : public unary_function<_Tp,void> {
-public:
- explicit const_mem_fun_ref_t(void (_Tp::*__pf)() const) : _M_f(__pf) {}
- void operator()(const _Tp& __r) const { (__r.*_M_f)(); }
-private:
- void (_Tp::*_M_f)() const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp, class _Arg>
-class mem_fun1_t<void, _Tp, _Arg> : public binary_function<_Tp*,_Arg,void> {
-public:
- explicit mem_fun1_t(void (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
- void operator()(_Tp* __p, _Arg __x) const { (__p->*_M_f)(__x); }
-private:
- void (_Tp::*_M_f)(_Arg);
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp, class _Arg>
-class const_mem_fun1_t<void, _Tp, _Arg>
- : public binary_function<const _Tp*,_Arg,void> {
-public:
- explicit const_mem_fun1_t(void (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
- void operator()(const _Tp* __p, _Arg __x) const { (__p->*_M_f)(__x); }
-private:
- void (_Tp::*_M_f)(_Arg) const;
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp, class _Arg>
-class mem_fun1_ref_t<void, _Tp, _Arg>
- : public binary_function<_Tp,_Arg,void> {
-public:
- explicit mem_fun1_ref_t(void (_Tp::*__pf)(_Arg)) : _M_f(__pf) {}
- void operator()(_Tp& __r, _Arg __x) const { (__r.*_M_f)(__x); }
-private:
- void (_Tp::*_M_f)(_Arg);
-};
-
-/// One of the @link s20_3_8_memadaptors adaptors for member pointers@endlink.
-template <class _Tp, class _Arg>
-class const_mem_fun1_ref_t<void, _Tp, _Arg>
- : public binary_function<_Tp,_Arg,void> {
-public:
- explicit const_mem_fun1_ref_t(void (_Tp::*__pf)(_Arg) const) : _M_f(__pf) {}
- void operator()(const _Tp& __r, _Arg __x) const { (__r.*_M_f)(__x); }
-private:
- void (_Tp::*_M_f)(_Arg) const;
-};
-
-
-// Mem_fun adaptor helper functions. There are only two:
-// mem_fun and mem_fun_ref.
-
-template <class _Ret, class _Tp>
-inline mem_fun_t<_Ret,_Tp> mem_fun(_Ret (_Tp::*__f)())
- { return mem_fun_t<_Ret,_Tp>(__f); }
-
-template <class _Ret, class _Tp>
-inline const_mem_fun_t<_Ret,_Tp> mem_fun(_Ret (_Tp::*__f)() const)
- { return const_mem_fun_t<_Ret,_Tp>(__f); }
-
-template <class _Ret, class _Tp>
-inline mem_fun_ref_t<_Ret,_Tp> mem_fun_ref(_Ret (_Tp::*__f)())
- { return mem_fun_ref_t<_Ret,_Tp>(__f); }
-
-template <class _Ret, class _Tp>
-inline const_mem_fun_ref_t<_Ret,_Tp> mem_fun_ref(_Ret (_Tp::*__f)() const)
- { return const_mem_fun_ref_t<_Ret,_Tp>(__f); }
-
-template <class _Ret, class _Tp, class _Arg>
-inline mem_fun1_t<_Ret,_Tp,_Arg> mem_fun(_Ret (_Tp::*__f)(_Arg))
- { return mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
-
-template <class _Ret, class _Tp, class _Arg>
-inline const_mem_fun1_t<_Ret,_Tp,_Arg> mem_fun(_Ret (_Tp::*__f)(_Arg) const)
- { return const_mem_fun1_t<_Ret,_Tp,_Arg>(__f); }
-
-template <class _Ret, class _Tp, class _Arg>
-inline mem_fun1_ref_t<_Ret,_Tp,_Arg> mem_fun_ref(_Ret (_Tp::*__f)(_Arg))
- { return mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
-
-template <class _Ret, class _Tp, class _Arg>
-inline const_mem_fun1_ref_t<_Ret,_Tp,_Arg>
-mem_fun_ref(_Ret (_Tp::*__f)(_Arg) const)
- { return const_mem_fun1_ref_t<_Ret,_Tp,_Arg>(__f); }
-
-/** @} */
-
-} // namespace std
-
-#endif /* __GLIBCPP_INTERNAL_FUNCTION_H */
-
-// Local Variables:
-// mode:C++
-// End:
+
+#endif /* _STL_FUNCTION_H */
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