372 lines
11 KiB
C++
372 lines
11 KiB
C++
/*
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*
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* Copyright (c) 1994
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* Hewlett-Packard Company
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*
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* Copyright (c) 1996-1998
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* Silicon Graphics Computer Systems, Inc.
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*
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* Copyright (c) 1997
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* Moscow Center for SPARC Technology
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*
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* Copyright (c) 1999
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* Boris Fomitchev
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*
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* This material is provided "as is", with absolutely no warranty expressed
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* or implied. Any use is at your own risk.
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*
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* Permission to use or copy this software for any purpose is hereby granted
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* without fee, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*
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*/
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/* NOTE: This is an internal header file, included by other STL headers.
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* You should not attempt to use it directly.
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*/
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#ifndef _STLP_INTERNAL_FUNCTION_H
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#define _STLP_INTERNAL_FUNCTION_H
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#ifndef _STLP_INTERNAL_FUNCTION_BASE_H
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#include <stl/_function_base.h>
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#endif
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_STLP_BEGIN_NAMESPACE
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# ifndef _STLP_NO_EXTENSIONS
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// identity_element (not part of the C++ standard).
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template <class _Tp> inline _Tp identity_element(plus<_Tp>) { return _Tp(0); }
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template <class _Tp> inline _Tp identity_element(multiplies<_Tp>) { return _Tp(1); }
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# endif
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# if defined (_STLP_BASE_TYPEDEF_BUG)
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// this workaround is needed for SunPro 4.0.1
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// suggested by "Martin Abernethy" <gma@paston.co.uk>:
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// We have to introduce the XXary_predicate_aux structures in order to
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// access the argument and return types of predicate functions supplied
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// as type parameters. SUN C++ 4.0.1 compiler gives errors for template type parameters
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// of the form 'name1::name2', where name1 is itself a type parameter.
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template <class _Pair>
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struct __pair_aux : private _Pair
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{
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typedef typename _Pair::first_type first_type;
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typedef typename _Pair::second_type second_type;
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};
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template <class _Operation>
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struct __unary_fun_aux : private _Operation
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{
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typedef typename _Operation::argument_type argument_type;
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typedef typename _Operation::result_type result_type;
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};
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template <class _Operation>
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struct __binary_fun_aux : private _Operation
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{
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typedef typename _Operation::first_argument_type first_argument_type;
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typedef typename _Operation::second_argument_type second_argument_type;
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typedef typename _Operation::result_type result_type;
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};
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# define __UNARY_ARG(__Operation,__type) __unary_fun_aux<__Operation>::__type
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# define __BINARY_ARG(__Operation,__type) __binary_fun_aux<__Operation>::__type
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# define __PAIR_ARG(__Pair,__type) __pair_aux<__Pair>::__type
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# else
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# define __UNARY_ARG(__Operation,__type) __Operation::__type
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# define __BINARY_ARG(__Operation,__type) __Operation::__type
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# define __PAIR_ARG(__Pair,__type) __Pair::__type
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# endif
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template <class _Predicate>
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class unary_negate :
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public unary_function<typename __UNARY_ARG(_Predicate,argument_type), bool> {
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protected:
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_Predicate _M_pred;
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public:
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explicit unary_negate(const _Predicate& __x) : _M_pred(__x) {}
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bool operator()(const typename _Predicate::argument_type& __x) const {
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return !_M_pred(__x);
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}
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};
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template <class _Predicate>
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inline unary_negate<_Predicate>
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not1(const _Predicate& __pred)
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{
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return unary_negate<_Predicate>(__pred);
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}
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template <class _Predicate>
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class binary_negate
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: public binary_function<typename __BINARY_ARG(_Predicate,first_argument_type),
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typename __BINARY_ARG(_Predicate,second_argument_type),
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bool> {
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protected:
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_Predicate _M_pred;
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public:
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explicit binary_negate(const _Predicate& __x) : _M_pred(__x) {}
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bool operator()(const typename _Predicate::first_argument_type& __x,
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const typename _Predicate::second_argument_type& __y) const
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{
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return !_M_pred(__x, __y);
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}
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};
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template <class _Predicate>
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inline binary_negate<_Predicate>
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not2(const _Predicate& __pred)
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{
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return binary_negate<_Predicate>(__pred);
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}
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template <class _Operation>
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class binder1st :
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public unary_function<typename __BINARY_ARG(_Operation,second_argument_type),
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typename __BINARY_ARG(_Operation,result_type) > {
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protected:
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_Operation _M_op;
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typename _Operation::first_argument_type _M_value;
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public:
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binder1st(const _Operation& __x,
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const typename _Operation::first_argument_type& __y)
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: _M_op(__x), _M_value(__y) {}
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typename _Operation::result_type
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operator()(const typename _Operation::second_argument_type& __x) const {
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return _M_op(_M_value, __x);
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}
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typename _Operation::result_type
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operator()(typename _Operation::second_argument_type& __x) const {
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return _M_op(_M_value, __x);
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}
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};
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template <class _Operation, class _Tp>
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inline binder1st<_Operation>
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bind1st(const _Operation& __fn, const _Tp& __x)
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{
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typedef typename _Operation::first_argument_type _Arg1_type;
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return binder1st<_Operation>(__fn, _Arg1_type(__x));
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}
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template <class _Operation>
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class binder2nd
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: public unary_function<typename __BINARY_ARG(_Operation,first_argument_type),
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typename __BINARY_ARG(_Operation,result_type)> {
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protected:
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_Operation _M_op;
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typename _Operation::second_argument_type value;
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public:
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binder2nd(const _Operation& __x,
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const typename _Operation::second_argument_type& __y)
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: _M_op(__x), value(__y) {}
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typename _Operation::result_type
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operator()(const typename _Operation::first_argument_type& __x) const {
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return _M_op(__x, value);
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}
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typename _Operation::result_type
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operator()(typename _Operation::first_argument_type& __x) const {
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return _M_op(__x, value);
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}
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};
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template <class _Operation, class _Tp>
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inline binder2nd<_Operation>
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bind2nd(const _Operation& __fn, const _Tp& __x)
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{
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typedef typename _Operation::second_argument_type _Arg2_type;
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return binder2nd<_Operation>(__fn, _Arg2_type(__x));
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}
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# ifndef _STLP_NO_EXTENSIONS
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// unary_compose and binary_compose (extensions, not part of the standard).
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template <class _Operation1, class _Operation2>
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class unary_compose :
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public unary_function<typename __UNARY_ARG(_Operation2,argument_type),
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typename __UNARY_ARG(_Operation1,result_type)> {
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protected:
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_Operation1 _M_fn1;
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_Operation2 _M_fn2;
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public:
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unary_compose(const _Operation1& __x, const _Operation2& __y)
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: _M_fn1(__x), _M_fn2(__y) {}
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typename _Operation1::result_type
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operator()(const typename _Operation2::argument_type& __x) const {
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return _M_fn1(_M_fn2(__x));
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}
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typename _Operation1::result_type
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operator()(typename _Operation2::argument_type& __x) const {
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return _M_fn1(_M_fn2(__x));
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}
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};
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template <class _Operation1, class _Operation2>
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inline unary_compose<_Operation1,_Operation2>
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compose1(const _Operation1& __fn1, const _Operation2& __fn2)
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{
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return unary_compose<_Operation1,_Operation2>(__fn1, __fn2);
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}
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template <class _Operation1, class _Operation2, class _Operation3>
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class binary_compose :
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public unary_function<typename __UNARY_ARG(_Operation2,argument_type),
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typename __BINARY_ARG(_Operation1,result_type)> {
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protected:
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_Operation1 _M_fn1;
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_Operation2 _M_fn2;
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_Operation3 _M_fn3;
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public:
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binary_compose(const _Operation1& __x, const _Operation2& __y,
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const _Operation3& __z)
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: _M_fn1(__x), _M_fn2(__y), _M_fn3(__z) { }
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typename _Operation1::result_type
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operator()(const typename _Operation2::argument_type& __x) const {
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return _M_fn1(_M_fn2(__x), _M_fn3(__x));
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}
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typename _Operation1::result_type
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operator()(typename _Operation2::argument_type& __x) const {
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return _M_fn1(_M_fn2(__x), _M_fn3(__x));
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}
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};
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template <class _Operation1, class _Operation2, class _Operation3>
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inline binary_compose<_Operation1, _Operation2, _Operation3>
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compose2(const _Operation1& __fn1, const _Operation2& __fn2,
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const _Operation3& __fn3)
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{
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return binary_compose<_Operation1,_Operation2,_Operation3>
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(__fn1, __fn2, __fn3);
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}
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# endif /* _STLP_NO_EXTENSIONS */
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# ifndef _STLP_NO_EXTENSIONS
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// identity is an extension: it is not part of the standard.
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template <class _Tp> struct identity : public _Identity<_Tp> {};
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// select1st and select2nd are extensions: they are not part of the standard.
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template <class _Pair> struct select1st : public _Select1st<_Pair> {};
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template <class _Pair> struct select2nd : public _Select2nd<_Pair> {};
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template <class _Arg1, class _Arg2>
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struct project1st : public _Project1st<_Arg1, _Arg2> {};
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template <class _Arg1, class _Arg2>
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struct project2nd : public _Project2nd<_Arg1, _Arg2> {};
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// constant_void_fun, constant_unary_fun, and constant_binary_fun are
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// extensions: they are not part of the standard. (The same, of course,
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// is true of the helper functions constant0, constant1, and constant2.)
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template <class _Result>
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struct _Constant_void_fun {
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typedef _Result result_type;
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result_type _M_val;
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_Constant_void_fun(const result_type& __v) : _M_val(__v) {}
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const result_type& operator()() const { return _M_val; }
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};
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template <class _Result>
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struct constant_void_fun : public _Constant_void_fun<_Result> {
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constant_void_fun(const _Result& __v) : _Constant_void_fun<_Result>(__v) {}
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};
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template <class _Result, __DFL_TMPL_PARAM( _Argument , _Result) >
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struct constant_unary_fun : public _Constant_unary_fun<_Result, _Argument>
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{
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constant_unary_fun(const _Result& __v)
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: _Constant_unary_fun<_Result, _Argument>(__v) {}
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};
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template <class _Result, __DFL_TMPL_PARAM( _Arg1 , _Result), __DFL_TMPL_PARAM( _Arg2 , _Arg1) >
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struct constant_binary_fun
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: public _Constant_binary_fun<_Result, _Arg1, _Arg2>
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{
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constant_binary_fun(const _Result& __v)
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: _Constant_binary_fun<_Result, _Arg1, _Arg2>(__v) {}
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};
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template <class _Result>
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inline constant_void_fun<_Result> constant0(const _Result& __val)
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{
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return constant_void_fun<_Result>(__val);
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}
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template <class _Result>
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inline constant_unary_fun<_Result,_Result> constant1(const _Result& __val)
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{
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return constant_unary_fun<_Result,_Result>(__val);
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}
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template <class _Result>
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inline constant_binary_fun<_Result,_Result,_Result>
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constant2(const _Result& __val)
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{
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return constant_binary_fun<_Result,_Result,_Result>(__val);
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}
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// subtractive_rng is an extension: it is not part of the standard.
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// Note: this code assumes that int is 32 bits.
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class subtractive_rng : public unary_function<_STLP_UINT32_T, _STLP_UINT32_T> {
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private:
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_STLP_UINT32_T _M_table[55];
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_STLP_UINT32_T _M_index1;
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_STLP_UINT32_T _M_index2;
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public:
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_STLP_UINT32_T operator()(_STLP_UINT32_T __limit) {
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_M_index1 = (_M_index1 + 1) % 55;
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_M_index2 = (_M_index2 + 1) % 55;
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_M_table[_M_index1] = _M_table[_M_index1] - _M_table[_M_index2];
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return _M_table[_M_index1] % __limit;
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}
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void _M_initialize(_STLP_UINT32_T __seed)
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{
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_STLP_UINT32_T __k = 1;
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_M_table[54] = __seed;
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_STLP_UINT32_T __i;
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for (__i = 0; __i < 54; __i++) {
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_STLP_UINT32_T __ii = (21 * (__i + 1) % 55) - 1;
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_M_table[__ii] = __k;
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__k = __seed - __k;
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__seed = _M_table[__ii];
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}
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for (int __loop = 0; __loop < 4; __loop++) {
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for (__i = 0; __i < 55; __i++)
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_M_table[__i] = _M_table[__i] - _M_table[(1 + __i + 30) % 55];
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}
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_M_index1 = 0;
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_M_index2 = 31;
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}
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subtractive_rng(unsigned int __seed) { _M_initialize(__seed); }
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subtractive_rng() { _M_initialize(161803398ul); }
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};
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# endif /* _STLP_NO_EXTENSIONS */
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_STLP_END_NAMESPACE
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#include <stl/_function_adaptors.h>
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#endif /* _STLP_INTERNAL_FUNCTION_H */
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// Local Variables:
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// mode:C++
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// End:
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