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jlechner |
// TR1 functional -*- C++ -*-
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// Copyright (C) 2005 Free Software Foundation, Inc.
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// Written by Douglas Gregor <doug.gregor -at- gmail.com>
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//
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// This file is part of the GNU ISO C++ Library. This library is free
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// software; you can redistribute it and/or modify it under the
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// terms of the GNU General Public License as published by the
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// Free Software Foundation; either version 2, or (at your option)
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// any later version.
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// This library is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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// You should have received a copy of the GNU General Public License along
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// with this library; see the file COPYING. If not, write to the Free
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// Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301,
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// USA.
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// As a special exception, you may use this file as part of a free software
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// library without restriction. Specifically, if other files instantiate
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// templates or use macros or inline functions from this file, or you compile
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// this file and link it with other files to produce an executable, this
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// file does not by itself cause the resulting executable to be covered by
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// the GNU General Public License. This exception does not however
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// invalidate any other reasons why the executable file might be covered by
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// the GNU General Public License.
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/** @file functional_iterate.h
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* This is an internal header file, included by other library headers.
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* You should not attempt to use it directly.
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*/
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template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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struct _Weak_result_type_impl<_Res(_GLIBCXX_TEMPLATE_ARGS)>
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{
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typedef _Res result_type;
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};
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template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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struct _Weak_result_type_impl<_Res (&)(_GLIBCXX_TEMPLATE_ARGS)>
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{
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typedef _Res result_type;
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};
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template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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struct _Weak_result_type_impl<_Res (*)(_GLIBCXX_TEMPLATE_ARGS)>
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{
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typedef _Res result_type;
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};
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#if _GLIBCXX_NUM_ARGS > 0
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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struct _Weak_result_type_impl<
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_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED)>
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{
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typedef _Res result_type;
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};
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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struct _Weak_result_type_impl<
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_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const>
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{
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typedef _Res result_type;
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};
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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struct _Weak_result_type_impl<
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_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile>
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{
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typedef _Res result_type;
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};
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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struct _Weak_result_type_impl<
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_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const volatile>
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{
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typedef _Res result_type;
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};
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#endif
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>
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: public _Result_of_impl<
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_Has_result_type<_Weak_result_type<_Functor> >::value,
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_Functor(_GLIBCXX_TEMPLATE_ARGS)>
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{ };
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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struct _Result_of_impl<true, _Functor(_GLIBCXX_TEMPLATE_ARGS)>
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{
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typedef typename _Weak_result_type<_Functor>::result_type type;
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};
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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struct _Result_of_impl<false, _Functor(_GLIBCXX_TEMPLATE_ARGS)>
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{
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#if _GLIBCXX_NUM_ARGS > 0
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typedef typename _Functor
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::template result<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type type;
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#else
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typedef void type;
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#endif
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};
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/**
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* @if maint
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* Invoke a function object, which may be either a member pointer or a
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* function object. The first parameter will tell which.
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* @endif
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*/
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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inline
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typename __enable_if<
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typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type,
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(!is_member_pointer<_Functor>::value
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&& !is_function<_Functor>::value
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&& !is_function<typename remove_pointer<_Functor>::type>::value)
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>::__type
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__invoke(_Functor& __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS)
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{
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return __f(_GLIBCXX_ARGS);
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}
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#if _GLIBCXX_NUM_ARGS > 0
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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inline
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typename __enable_if<
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typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type,
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(is_member_pointer<_Functor>::value
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&& !is_function<_Functor>::value
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&& !is_function<typename remove_pointer<_Functor>::type>::value)
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>::__type
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__invoke(_Functor& __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS)
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{
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return mem_fn(__f)(_GLIBCXX_ARGS);
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}
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#endif
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// To pick up function references (that will become function pointers)
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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inline
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typename __enable_if<
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typename result_of<_Functor(_GLIBCXX_TEMPLATE_ARGS)>::type,
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(is_pointer<_Functor>::value
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&& is_function<typename remove_pointer<_Functor>::type>::value)
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>::__type
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__invoke(_Functor __f _GLIBCXX_COMMA _GLIBCXX_REF_PARAMS)
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{
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return __f(_GLIBCXX_ARGS);
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}
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/**
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* @if maint
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* Implementation of reference_wrapper::operator()
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* @endif
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*/
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#if _GLIBCXX_NUM_ARGS > 0
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template<typename _Tp>
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template<_GLIBCXX_TEMPLATE_PARAMS>
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typename result_of<
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typename reference_wrapper<_Tp>::_M_func_type(_GLIBCXX_TEMPLATE_ARGS)>::type
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reference_wrapper<_Tp>::operator()(_GLIBCXX_REF_PARAMS) const
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{
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return __invoke(get(), _GLIBCXX_ARGS);
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}
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#endif
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#if _GLIBCXX_NUM_ARGS > 0
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED)>
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#if _GLIBCXX_NUM_ARGS == 1
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: public unary_function<_Class*, _Res>
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#elif _GLIBCXX_NUM_ARGS == 2
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: public binary_function<_Class*, _T1, _Res>
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#endif
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{
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typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED);
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template<typename _Tp>
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_Res
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_M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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template<typename _Tp>
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_Res
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_M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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public:
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typedef _Res result_type;
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explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
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// Handle objects
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_Res
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operator()(_Class& __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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// Handle pointers
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_Res
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operator()(_Class* __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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// Handle smart pointers, references and pointers to derived
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template<typename _Tp>
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_Res
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operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{
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return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_ARGS_SHIFTED);
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}
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private:
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_Functor __pmf;
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};
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const>
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#if _GLIBCXX_NUM_ARGS == 1
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: public unary_function<const _Class*, _Res>
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#elif _GLIBCXX_NUM_ARGS == 2
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: public binary_function<const _Class*, _T1, _Res>
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#endif
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{
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typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const;
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template<typename _Tp>
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_Res
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_M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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template<typename _Tp>
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_Res
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_M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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public:
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typedef _Res result_type;
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explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
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// Handle objects
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_Res
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operator()(const _Class& __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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// Handle pointers
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_Res
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operator()(const _Class* __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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// Handle smart pointers, references and pointers to derived
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template<typename _Tp>
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_Res
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operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{
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return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_ARGS_SHIFTED);
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}
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private:
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_Functor __pmf;
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};
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template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
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class _Mem_fn<_Res (_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile>
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#if _GLIBCXX_NUM_ARGS == 1
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: public unary_function<volatile _Class*, _Res>
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#elif _GLIBCXX_NUM_ARGS == 2
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: public binary_function<volatile _Class*, _T1, _Res>
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#endif
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{
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typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) volatile;
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295 |
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template<typename _Tp>
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_Res
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_M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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template<typename _Tp>
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_Res
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_M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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{ return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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public:
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typedef _Res result_type;
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310 |
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explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
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// Handle objects
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_Res
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operator()(volatile _Class& __object _GLIBCXX_COMMA_SHIFTED
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_GLIBCXX_PARAMS_SHIFTED) const
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316 |
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{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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318 |
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// Handle pointers
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_Res
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operator()(volatile _Class* __object _GLIBCXX_COMMA_SHIFTED
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321 |
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_GLIBCXX_PARAMS_SHIFTED) const
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322 |
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{ return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
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324 |
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// Handle smart pointers, references and pointers to derived
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325 |
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template<typename _Tp>
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326 |
|
|
_Res
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|
|
operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED
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328 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
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329 |
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{
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return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED
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|
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_GLIBCXX_ARGS_SHIFTED);
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332 |
|
|
}
|
333 |
|
|
private:
|
334 |
|
|
_Functor __pmf;
|
335 |
|
|
};
|
336 |
|
|
|
337 |
|
|
template<typename _Res, typename _Class _GLIBCXX_COMMA_SHIFTED
|
338 |
|
|
_GLIBCXX_TEMPLATE_PARAMS_SHIFTED>
|
339 |
|
|
class _Mem_fn<_Res(_Class::*)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED) const volatile>
|
340 |
|
|
#if _GLIBCXX_NUM_ARGS == 1
|
341 |
|
|
: public unary_function<const volatile _Class*, _Res>
|
342 |
|
|
#elif _GLIBCXX_NUM_ARGS == 2
|
343 |
|
|
: public binary_function<const volatile _Class*, _T1, _Res>
|
344 |
|
|
#endif
|
345 |
|
|
{
|
346 |
|
|
typedef _Res (_Class::*_Functor)(_GLIBCXX_TEMPLATE_ARGS_SHIFTED)
|
347 |
|
|
const volatile;
|
348 |
|
|
|
349 |
|
|
template<typename _Tp>
|
350 |
|
|
_Res
|
351 |
|
|
_M_call(_Tp& __object, const volatile _Class * _GLIBCXX_COMMA_SHIFTED
|
352 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
|
353 |
|
|
{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
|
354 |
|
|
|
355 |
|
|
template<typename _Tp>
|
356 |
|
|
_Res
|
357 |
|
|
_M_call(_Tp& __ptr, const volatile void * _GLIBCXX_COMMA_SHIFTED
|
358 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
|
359 |
|
|
{ return ((*__ptr).*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
|
360 |
|
|
|
361 |
|
|
public:
|
362 |
|
|
typedef _Res result_type;
|
363 |
|
|
|
364 |
|
|
explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
|
365 |
|
|
|
366 |
|
|
// Handle objects
|
367 |
|
|
_Res
|
368 |
|
|
operator()(const volatile _Class& __object _GLIBCXX_COMMA_SHIFTED
|
369 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
|
370 |
|
|
{ return (__object.*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
|
371 |
|
|
|
372 |
|
|
// Handle pointers
|
373 |
|
|
_Res
|
374 |
|
|
operator()(const volatile _Class* __object _GLIBCXX_COMMA_SHIFTED
|
375 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
|
376 |
|
|
{ return (__object->*__pmf)(_GLIBCXX_ARGS_SHIFTED); }
|
377 |
|
|
|
378 |
|
|
// Handle smart pointers, references and pointers to derived
|
379 |
|
|
template<typename _Tp>
|
380 |
|
|
_Res
|
381 |
|
|
operator()(_Tp& __object _GLIBCXX_COMMA_SHIFTED
|
382 |
|
|
_GLIBCXX_PARAMS_SHIFTED) const
|
383 |
|
|
{
|
384 |
|
|
return _M_call(__object, &__object _GLIBCXX_COMMA_SHIFTED
|
385 |
|
|
_GLIBCXX_ARGS_SHIFTED);
|
386 |
|
|
}
|
387 |
|
|
|
388 |
|
|
private:
|
389 |
|
|
_Functor __pmf;
|
390 |
|
|
};
|
391 |
|
|
#endif
|
392 |
|
|
|
393 |
|
|
#if _GLIBCXX_NUM_ARGS > 0
|
394 |
|
|
namespace placeholders
|
395 |
|
|
{
|
396 |
|
|
namespace
|
397 |
|
|
{
|
398 |
|
|
_Placeholder<_GLIBCXX_NUM_ARGS> _GLIBCXX_JOIN(_,_GLIBCXX_NUM_ARGS);
|
399 |
|
|
}
|
400 |
|
|
}
|
401 |
|
|
#endif
|
402 |
|
|
|
403 |
|
|
template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
404 |
|
|
class _Bind<_Functor(_GLIBCXX_TEMPLATE_ARGS)>
|
405 |
|
|
: public _Weak_result_type<_Functor>
|
406 |
|
|
{
|
407 |
|
|
typedef _Bind __self_type;
|
408 |
|
|
|
409 |
|
|
_Functor _M_f;
|
410 |
|
|
_GLIBCXX_BIND_MEMBERS
|
411 |
|
|
|
412 |
|
|
public:
|
413 |
|
|
#if _GLIBCXX_NUM_ARGS == 0
|
414 |
|
|
explicit
|
415 |
|
|
#endif
|
416 |
|
|
_Bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
417 |
|
|
: _M_f(__f) _GLIBCXX_COMMA _GLIBCXX_BIND_MEMBERS_INIT { }
|
418 |
|
|
|
419 |
|
|
#define _GLIBCXX_BIND_REPEAT_HEADER <tr1/bind_iterate.h>
|
420 |
|
|
#include <tr1/bind_repeat.h>
|
421 |
|
|
#undef _GLIBCXX_BIND_REPEAT_HEADER
|
422 |
|
|
};
|
423 |
|
|
|
424 |
|
|
template<typename _Result, typename _Functor
|
425 |
|
|
_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
426 |
|
|
class _Bind_result<_Result, _Functor(_GLIBCXX_TEMPLATE_ARGS)>
|
427 |
|
|
{
|
428 |
|
|
_Functor _M_f;
|
429 |
|
|
_GLIBCXX_BIND_MEMBERS
|
430 |
|
|
|
431 |
|
|
public:
|
432 |
|
|
typedef _Result result_type;
|
433 |
|
|
|
434 |
|
|
#if _GLIBCXX_NUM_ARGS == 0
|
435 |
|
|
explicit
|
436 |
|
|
#endif
|
437 |
|
|
_Bind_result(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
438 |
|
|
: _M_f(__f) _GLIBCXX_COMMA _GLIBCXX_BIND_MEMBERS_INIT { }
|
439 |
|
|
|
440 |
|
|
#define _GLIBCXX_BIND_REPEAT_HEADER <tr1/bind_iterate.h>
|
441 |
|
|
#define _GLIBCXX_BIND_HAS_RESULT_TYPE
|
442 |
|
|
#include <tr1/bind_repeat.h>
|
443 |
|
|
#undef _GLIBCXX_BIND_HAS_RESULT_TYPE
|
444 |
|
|
#undef _GLIBCXX_BIND_REPEAT_HEADER
|
445 |
|
|
};
|
446 |
|
|
|
447 |
|
|
// Handle arbitrary function objects
|
448 |
|
|
template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
449 |
|
|
inline
|
450 |
|
|
_Bind<typename _Maybe_wrap_member_pointer<_Functor>::type
|
451 |
|
|
(_GLIBCXX_TEMPLATE_ARGS)>
|
452 |
|
|
bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
453 |
|
|
{
|
454 |
|
|
typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type;
|
455 |
|
|
typedef typename __maybe_type::type __functor_type;
|
456 |
|
|
typedef _Bind<__functor_type(_GLIBCXX_TEMPLATE_ARGS)> __result_type;
|
457 |
|
|
return __result_type(__maybe_type::__do_wrap(__f)
|
458 |
|
|
_GLIBCXX_COMMA _GLIBCXX_ARGS);
|
459 |
|
|
}
|
460 |
|
|
|
461 |
|
|
template<typename _Result, typename _Functor
|
462 |
|
|
_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
463 |
|
|
inline
|
464 |
|
|
_Bind_result<_Result,
|
465 |
|
|
typename _Maybe_wrap_member_pointer<_Functor>::type
|
466 |
|
|
(_GLIBCXX_TEMPLATE_ARGS)>
|
467 |
|
|
bind(_Functor __f _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
468 |
|
|
{
|
469 |
|
|
typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type;
|
470 |
|
|
typedef typename __maybe_type::type __functor_type;
|
471 |
|
|
typedef _Bind_result<_Result, __functor_type(_GLIBCXX_TEMPLATE_ARGS)>
|
472 |
|
|
__result_type;
|
473 |
|
|
return __result_type(__maybe_type::__do_wrap(__f)
|
474 |
|
|
_GLIBCXX_COMMA _GLIBCXX_ARGS);
|
475 |
|
|
}
|
476 |
|
|
|
477 |
|
|
template<typename _Res, typename _Functor _GLIBCXX_COMMA
|
478 |
|
|
_GLIBCXX_TEMPLATE_PARAMS>
|
479 |
|
|
class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Functor>
|
480 |
|
|
: public _Function_base::_Base_manager<_Functor>
|
481 |
|
|
{
|
482 |
|
|
typedef _Function_base::_Base_manager<_Functor> _Base;
|
483 |
|
|
|
484 |
|
|
public:
|
485 |
|
|
static _Res
|
486 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
487 |
|
|
{
|
488 |
|
|
return (*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
|
489 |
|
|
}
|
490 |
|
|
};
|
491 |
|
|
|
492 |
|
|
template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
493 |
|
|
class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Functor>
|
494 |
|
|
: public _Function_base::_Base_manager<_Functor>
|
495 |
|
|
{
|
496 |
|
|
typedef _Function_base::_Base_manager<_Functor> _Base;
|
497 |
|
|
|
498 |
|
|
public:
|
499 |
|
|
static void
|
500 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
501 |
|
|
{
|
502 |
|
|
(*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
|
503 |
|
|
}
|
504 |
|
|
};
|
505 |
|
|
|
506 |
|
|
template<typename _Res, typename _Functor _GLIBCXX_COMMA
|
507 |
|
|
_GLIBCXX_TEMPLATE_PARAMS>
|
508 |
|
|
class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS),
|
509 |
|
|
reference_wrapper<_Functor> >
|
510 |
|
|
: public _Function_base::_Ref_manager<_Functor>
|
511 |
|
|
{
|
512 |
|
|
typedef _Function_base::_Ref_manager<_Functor> _Base;
|
513 |
|
|
|
514 |
|
|
public:
|
515 |
|
|
static _Res
|
516 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
517 |
|
|
{
|
518 |
|
|
return __callable_functor(**_Base::_M_get_pointer(__functor))
|
519 |
|
|
(_GLIBCXX_ARGS);
|
520 |
|
|
}
|
521 |
|
|
};
|
522 |
|
|
|
523 |
|
|
template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
524 |
|
|
class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS),
|
525 |
|
|
reference_wrapper<_Functor> >
|
526 |
|
|
: public _Function_base::_Ref_manager<_Functor>
|
527 |
|
|
{
|
528 |
|
|
typedef _Function_base::_Ref_manager<_Functor> _Base;
|
529 |
|
|
|
530 |
|
|
public:
|
531 |
|
|
static void
|
532 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
533 |
|
|
{
|
534 |
|
|
__callable_functor(**_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
|
535 |
|
|
}
|
536 |
|
|
};
|
537 |
|
|
|
538 |
|
|
template<typename _Class, typename _Member, typename _Res
|
539 |
|
|
_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
540 |
|
|
class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
|
541 |
|
|
: public _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
|
542 |
|
|
{
|
543 |
|
|
typedef _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
|
544 |
|
|
_Base;
|
545 |
|
|
|
546 |
|
|
public:
|
547 |
|
|
static _Res
|
548 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
549 |
|
|
{
|
550 |
|
|
return std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value)
|
551 |
|
|
(_GLIBCXX_ARGS);
|
552 |
|
|
}
|
553 |
|
|
};
|
554 |
|
|
|
555 |
|
|
template<typename _Class, typename _Member
|
556 |
|
|
_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
557 |
|
|
class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
|
558 |
|
|
: public _Function_base::_Base_manager<
|
559 |
|
|
_Simple_type_wrapper< _Member _Class::* > >
|
560 |
|
|
{
|
561 |
|
|
typedef _Member _Class::* _Functor;
|
562 |
|
|
typedef _Simple_type_wrapper< _Functor > _Wrapper;
|
563 |
|
|
typedef _Function_base::_Base_manager<_Wrapper> _Base;
|
564 |
|
|
|
565 |
|
|
public:
|
566 |
|
|
static bool
|
567 |
|
|
_M_manager(_Any_data& __dest, const _Any_data& __source,
|
568 |
|
|
_Manager_operation __op)
|
569 |
|
|
{
|
570 |
|
|
switch (__op) {
|
571 |
|
|
case __get_type_info:
|
572 |
|
|
__dest._M_access<const type_info*>() = &typeid(_Functor);
|
573 |
|
|
break;
|
574 |
|
|
|
575 |
|
|
case __get_functor_ptr:
|
576 |
|
|
__dest._M_access<_Functor*>() =
|
577 |
|
|
&_Base::_M_get_pointer(__source)->__value;
|
578 |
|
|
break;
|
579 |
|
|
|
580 |
|
|
default:
|
581 |
|
|
_Base::_M_manager(__dest, __source, __op);
|
582 |
|
|
}
|
583 |
|
|
return false;
|
584 |
|
|
}
|
585 |
|
|
|
586 |
|
|
static void
|
587 |
|
|
_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
|
588 |
|
|
{
|
589 |
|
|
std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value)
|
590 |
|
|
(_GLIBCXX_ARGS);
|
591 |
|
|
}
|
592 |
|
|
};
|
593 |
|
|
|
594 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
595 |
|
|
class function<_Res(_GLIBCXX_TEMPLATE_ARGS)>
|
596 |
|
|
#if _GLIBCXX_NUM_ARGS == 1
|
597 |
|
|
: public unary_function<_T1, _Res>, private _Function_base
|
598 |
|
|
#elif _GLIBCXX_NUM_ARGS == 2
|
599 |
|
|
: public binary_function<_T1, _T2, _Res>, private _Function_base
|
600 |
|
|
#else
|
601 |
|
|
: private _Function_base
|
602 |
|
|
#endif
|
603 |
|
|
{
|
604 |
|
|
/**
|
605 |
|
|
* @if maint
|
606 |
|
|
* This class is used to implement the safe_bool idiom.
|
607 |
|
|
* @endif
|
608 |
|
|
*/
|
609 |
|
|
struct _Hidden_type
|
610 |
|
|
{
|
611 |
|
|
_Hidden_type* _M_bool;
|
612 |
|
|
};
|
613 |
|
|
|
614 |
|
|
/**
|
615 |
|
|
* @if maint
|
616 |
|
|
* This typedef is used to implement the safe_bool idiom.
|
617 |
|
|
* @endif
|
618 |
|
|
*/
|
619 |
|
|
typedef _Hidden_type* _Hidden_type::* _Safe_bool;
|
620 |
|
|
|
621 |
|
|
typedef _Res _Signature_type(_GLIBCXX_TEMPLATE_ARGS);
|
622 |
|
|
|
623 |
|
|
struct _Useless {};
|
624 |
|
|
|
625 |
|
|
public:
|
626 |
|
|
typedef _Res result_type;
|
627 |
|
|
|
628 |
|
|
// [3.7.2.1] construct/copy/destroy
|
629 |
|
|
|
630 |
|
|
/**
|
631 |
|
|
* @brief Default construct creates an empty function call wrapper.
|
632 |
|
|
* @post @c !(bool)*this
|
633 |
|
|
*/
|
634 |
|
|
function() : _Function_base() { }
|
635 |
|
|
|
636 |
|
|
/**
|
637 |
|
|
* @brief Default construct creates an empty function call wrapper.
|
638 |
|
|
* @post @c !(bool)*this
|
639 |
|
|
*/
|
640 |
|
|
function(_M_clear_type*) : _Function_base() { }
|
641 |
|
|
|
642 |
|
|
/**
|
643 |
|
|
* @brief %Function copy constructor.
|
644 |
|
|
* @param x A %function object with identical call signature.
|
645 |
|
|
* @pre @c (bool)*this == (bool)x
|
646 |
|
|
*
|
647 |
|
|
* The newly-created %function contains a copy of the target of @a
|
648 |
|
|
* x (if it has one).
|
649 |
|
|
*/
|
650 |
|
|
function(const function& __x);
|
651 |
|
|
|
652 |
|
|
/**
|
653 |
|
|
* @brief Builds a %function that targets a copy of the incoming
|
654 |
|
|
* function object.
|
655 |
|
|
* @param f A %function object that is callable with parameters of
|
656 |
|
|
* type @c T1, @c T2, ..., @c TN and returns a value convertible
|
657 |
|
|
* to @c Res.
|
658 |
|
|
*
|
659 |
|
|
* The newly-created %function object will target a copy of @a
|
660 |
|
|
* f. If @a f is @c reference_wrapper<F>, then this function
|
661 |
|
|
* object will contain a reference to the function object @c
|
662 |
|
|
* f.get(). If @a f is a NULL function pointer or NULL
|
663 |
|
|
* pointer-to-member, the newly-created object will be empty.
|
664 |
|
|
*
|
665 |
|
|
* If @a f is a non-NULL function pointer or an object of type @c
|
666 |
|
|
* reference_wrapper<F>, this function will not throw.
|
667 |
|
|
*/
|
668 |
|
|
template<typename _Functor>
|
669 |
|
|
function(_Functor __f,
|
670 |
|
|
typename __enable_if<_Useless,
|
671 |
|
|
!is_integral<_Functor>::value>::__type
|
672 |
|
|
= _Useless());
|
673 |
|
|
|
674 |
|
|
/**
|
675 |
|
|
* @brief %Function assignment operator.
|
676 |
|
|
* @param x A %function with identical call signature.
|
677 |
|
|
* @post @c (bool)*this == (bool)x
|
678 |
|
|
* @returns @c *this
|
679 |
|
|
*
|
680 |
|
|
* The target of @a x is copied to @c *this. If @a x has no
|
681 |
|
|
* target, then @c *this will be empty.
|
682 |
|
|
*
|
683 |
|
|
* If @a x targets a function pointer or a reference to a function
|
684 |
|
|
* object, then this operation will not throw an exception.
|
685 |
|
|
*/
|
686 |
|
|
function& operator=(const function& __x)
|
687 |
|
|
{
|
688 |
|
|
function(__x).swap(*this);
|
689 |
|
|
return *this;
|
690 |
|
|
}
|
691 |
|
|
|
692 |
|
|
/**
|
693 |
|
|
* @brief %Function assignment to zero.
|
694 |
|
|
* @post @c !(bool)*this
|
695 |
|
|
* @returns @c *this
|
696 |
|
|
*
|
697 |
|
|
* The target of @a *this is deallocated, leaving it empty.
|
698 |
|
|
*/
|
699 |
|
|
function& operator=(_M_clear_type*)
|
700 |
|
|
{
|
701 |
|
|
if (_M_manager) {
|
702 |
|
|
_M_manager(_M_functor, _M_functor, __destroy_functor);
|
703 |
|
|
_M_manager = 0;
|
704 |
|
|
_M_invoker = 0;
|
705 |
|
|
}
|
706 |
|
|
return *this;
|
707 |
|
|
}
|
708 |
|
|
|
709 |
|
|
/**
|
710 |
|
|
* @brief %Function assignment to a new target.
|
711 |
|
|
* @param f A %function object that is callable with parameters of
|
712 |
|
|
* type @c T1, @c T2, ..., @c TN and returns a value convertible
|
713 |
|
|
* to @c Res.
|
714 |
|
|
* @return @c *this
|
715 |
|
|
*
|
716 |
|
|
* This %function object wrapper will target a copy of @a
|
717 |
|
|
* f. If @a f is @c reference_wrapper<F>, then this function
|
718 |
|
|
* object will contain a reference to the function object @c
|
719 |
|
|
* f.get(). If @a f is a NULL function pointer or NULL
|
720 |
|
|
* pointer-to-member, @c this object will be empty.
|
721 |
|
|
*
|
722 |
|
|
* If @a f is a non-NULL function pointer or an object of type @c
|
723 |
|
|
* reference_wrapper<F>, this function will not throw.
|
724 |
|
|
*/
|
725 |
|
|
template<typename _Functor>
|
726 |
|
|
typename __enable_if<function&, !is_integral<_Functor>::value>::__type
|
727 |
|
|
operator=(_Functor __f)
|
728 |
|
|
{
|
729 |
|
|
function(__f).swap(*this);
|
730 |
|
|
return *this;
|
731 |
|
|
}
|
732 |
|
|
|
733 |
|
|
// [3.7.2.2] function modifiers
|
734 |
|
|
|
735 |
|
|
/**
|
736 |
|
|
* @brief Swap the targets of two %function objects.
|
737 |
|
|
* @param f A %function with identical call signature.
|
738 |
|
|
*
|
739 |
|
|
* Swap the targets of @c this function object and @a f. This
|
740 |
|
|
* function will not throw an exception.
|
741 |
|
|
*/
|
742 |
|
|
void swap(function& __x)
|
743 |
|
|
{
|
744 |
|
|
_Any_data __old_functor = _M_functor;
|
745 |
|
|
_M_functor = __x._M_functor;
|
746 |
|
|
__x._M_functor = __old_functor;
|
747 |
|
|
_Manager_type __old_manager = _M_manager;
|
748 |
|
|
_M_manager = __x._M_manager;
|
749 |
|
|
__x._M_manager = __old_manager;
|
750 |
|
|
_Invoker_type __old_invoker = _M_invoker;
|
751 |
|
|
_M_invoker = __x._M_invoker;
|
752 |
|
|
__x._M_invoker = __old_invoker;
|
753 |
|
|
}
|
754 |
|
|
|
755 |
|
|
// [3.7.2.3] function capacity
|
756 |
|
|
|
757 |
|
|
/**
|
758 |
|
|
* @brief Determine if the %function wrapper has a target.
|
759 |
|
|
*
|
760 |
|
|
* @return @c true when this %function object contains a target,
|
761 |
|
|
* or @c false when it is empty.
|
762 |
|
|
*
|
763 |
|
|
* This function will not throw an exception.
|
764 |
|
|
*/
|
765 |
|
|
operator _Safe_bool() const
|
766 |
|
|
{
|
767 |
|
|
if (_M_empty())
|
768 |
|
|
{
|
769 |
|
|
return 0;
|
770 |
|
|
}
|
771 |
|
|
else
|
772 |
|
|
{
|
773 |
|
|
return &_Hidden_type::_M_bool;
|
774 |
|
|
}
|
775 |
|
|
}
|
776 |
|
|
|
777 |
|
|
// [3.7.2.4] function invocation
|
778 |
|
|
|
779 |
|
|
/**
|
780 |
|
|
* @brief Invokes the function targeted by @c *this.
|
781 |
|
|
* @returns the result of the target.
|
782 |
|
|
* @throws bad_function_call when @c !(bool)*this
|
783 |
|
|
*
|
784 |
|
|
* The function call operator invokes the target function object
|
785 |
|
|
* stored by @c this.
|
786 |
|
|
*/
|
787 |
|
|
_Res operator()(_GLIBCXX_PARAMS) const;
|
788 |
|
|
|
789 |
|
|
// [3.7.2.5] function target access
|
790 |
|
|
/**
|
791 |
|
|
* @brief Determine the type of the target of this function object
|
792 |
|
|
* wrapper.
|
793 |
|
|
*
|
794 |
|
|
* @returns the type identifier of the target function object, or
|
795 |
|
|
* @c typeid(void) if @c !(bool)*this.
|
796 |
|
|
*
|
797 |
|
|
* This function will not throw an exception.
|
798 |
|
|
*/
|
799 |
|
|
const type_info& target_type() const;
|
800 |
|
|
|
801 |
|
|
/**
|
802 |
|
|
* @brief Access the stored target function object.
|
803 |
|
|
*
|
804 |
|
|
* @return Returns a pointer to the stored target function object,
|
805 |
|
|
* if @c typeid(Functor).equals(target_type()); otherwise, a NULL
|
806 |
|
|
* pointer.
|
807 |
|
|
*
|
808 |
|
|
* This function will not throw an exception.
|
809 |
|
|
*/
|
810 |
|
|
template<typename _Functor> _Functor* target();
|
811 |
|
|
|
812 |
|
|
/**
|
813 |
|
|
* @overload
|
814 |
|
|
*/
|
815 |
|
|
template<typename _Functor> const _Functor* target() const;
|
816 |
|
|
|
817 |
|
|
private:
|
818 |
|
|
// [3.7.2.6] undefined operators
|
819 |
|
|
template<typename _Function>
|
820 |
|
|
void operator==(const function<_Function>&) const;
|
821 |
|
|
template<typename _Function>
|
822 |
|
|
void operator!=(const function<_Function>&) const;
|
823 |
|
|
|
824 |
|
|
typedef _Res (*_Invoker_type)(const _Any_data& _GLIBCXX_COMMA
|
825 |
|
|
_GLIBCXX_PARAMS);
|
826 |
|
|
_Invoker_type _M_invoker;
|
827 |
|
|
};
|
828 |
|
|
|
829 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
830 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::function(const function& __x)
|
831 |
|
|
: _Function_base()
|
832 |
|
|
{
|
833 |
|
|
if (__x) {
|
834 |
|
|
_M_invoker = __x._M_invoker;
|
835 |
|
|
_M_manager = __x._M_manager;
|
836 |
|
|
__x._M_manager(_M_functor, __x._M_functor, __clone_functor);
|
837 |
|
|
}
|
838 |
|
|
}
|
839 |
|
|
|
840 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
841 |
|
|
template<typename _Functor>
|
842 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>
|
843 |
|
|
::function(_Functor __f,
|
844 |
|
|
typename __enable_if<_Useless,
|
845 |
|
|
!is_integral<_Functor>::value>::__type)
|
846 |
|
|
: _Function_base()
|
847 |
|
|
{
|
848 |
|
|
typedef _Function_handler<_Signature_type, _Functor> _My_handler;
|
849 |
|
|
if (_My_handler::_M_not_empty_function(__f)) {
|
850 |
|
|
_M_invoker = &_My_handler::_M_invoke;
|
851 |
|
|
_M_manager = &_My_handler::_M_manager;
|
852 |
|
|
_My_handler::_M_init_functor(_M_functor, __f);
|
853 |
|
|
}
|
854 |
|
|
}
|
855 |
|
|
|
856 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
857 |
|
|
_Res
|
858 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::operator()(_GLIBCXX_PARAMS) const
|
859 |
|
|
{
|
860 |
|
|
if (_M_empty())
|
861 |
|
|
{
|
862 |
|
|
#if __EXCEPTIONS
|
863 |
|
|
throw bad_function_call();
|
864 |
|
|
#else
|
865 |
|
|
std::abort();
|
866 |
|
|
#endif
|
867 |
|
|
}
|
868 |
|
|
return _M_invoker(_M_functor _GLIBCXX_COMMA _GLIBCXX_ARGS);
|
869 |
|
|
}
|
870 |
|
|
|
871 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
872 |
|
|
const type_info&
|
873 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target_type() const
|
874 |
|
|
{
|
875 |
|
|
if (_M_manager)
|
876 |
|
|
{
|
877 |
|
|
_Any_data __typeinfo_result;
|
878 |
|
|
_M_manager(__typeinfo_result, _M_functor, __get_type_info);
|
879 |
|
|
return *__typeinfo_result._M_access<const type_info*>();
|
880 |
|
|
}
|
881 |
|
|
else
|
882 |
|
|
{
|
883 |
|
|
return typeid(void);
|
884 |
|
|
}
|
885 |
|
|
}
|
886 |
|
|
|
887 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
888 |
|
|
template<typename _Functor>
|
889 |
|
|
_Functor*
|
890 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target()
|
891 |
|
|
{
|
892 |
|
|
if (typeid(_Functor) == target_type() && _M_manager)
|
893 |
|
|
{
|
894 |
|
|
_Any_data __ptr;
|
895 |
|
|
if (_M_manager(__ptr, _M_functor, __get_functor_ptr)
|
896 |
|
|
&& !is_const<_Functor>::value)
|
897 |
|
|
return 0;
|
898 |
|
|
else
|
899 |
|
|
return __ptr._M_access<_Functor*>();
|
900 |
|
|
}
|
901 |
|
|
else
|
902 |
|
|
{
|
903 |
|
|
return 0;
|
904 |
|
|
}
|
905 |
|
|
}
|
906 |
|
|
|
907 |
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
908 |
|
|
template<typename _Functor>
|
909 |
|
|
const _Functor*
|
910 |
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target() const
|
911 |
|
|
{
|
912 |
|
|
if (typeid(_Functor) == target_type() && _M_manager)
|
913 |
|
|
{
|
914 |
|
|
_Any_data __ptr;
|
915 |
|
|
_M_manager(__ptr, _M_functor, __get_functor_ptr);
|
916 |
|
|
return __ptr._M_access<const _Functor*>();
|
917 |
|
|
}
|
918 |
|
|
else
|
919 |
|
|
{
|
920 |
|
|
return 0;
|
921 |
|
|
}
|
922 |
|
|
}
|
923 |
|
|
|