701 lines
21 KiB
C++
701 lines
21 KiB
C++
// TR1 functional -*- C++ -*-
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// Copyright (C) 2005 Free Software Foundation, Inc.
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// Writtten by Douglas Gregor <dgregor@cs.indiana.edu>
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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, 59 Temple Place - Suite 330, Boston, MA 02111-1307,
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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 function_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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#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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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()(volatile _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()(volatile _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 volatile>
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#if _GLIBCXX_NUM_ARGS == 1
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: public unary_function<const volatile _Class*, _Res>
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#elif _GLIBCXX_NUM_ARGS == 2
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: public binary_function<const 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)
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const volatile;
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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 volatile _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 volatile _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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#endif
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template<typename _Signature, typename _Functor> class _Function_handler;
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template<typename _Res, typename _Functor _GLIBCXX_COMMA
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_GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Functor>
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: public _Function_base::_Base_manager<_Functor>
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{
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typedef _Function_base::_Base_manager<_Functor> _Base;
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public:
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static _Res
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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return (*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
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}
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};
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Functor>
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: public _Function_base::_Base_manager<_Functor>
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{
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typedef _Function_base::_Base_manager<_Functor> _Base;
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public:
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static void
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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(*_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
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}
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};
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template<typename _Res, typename _Functor _GLIBCXX_COMMA
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_GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS),
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reference_wrapper<_Functor> >
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: public _Function_base::_Ref_manager<_Functor>
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{
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typedef _Function_base::_Ref_manager<_Functor> _Base;
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public:
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static _Res
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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return __callable_functor(**_Base::_M_get_pointer(__functor))
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(_GLIBCXX_ARGS);
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}
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};
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template<typename _Functor _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS),
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reference_wrapper<_Functor> >
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: public _Function_base::_Ref_manager<_Functor>
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{
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typedef _Function_base::_Ref_manager<_Functor> _Base;
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public:
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static void
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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__callable_functor(**_Base::_M_get_pointer(__functor))(_GLIBCXX_ARGS);
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}
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};
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template<typename _Class, typename _Member, typename _Res
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_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<_Res(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
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: public _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
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{
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typedef _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
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_Base;
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public:
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static _Res
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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return std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value)
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(_GLIBCXX_ARGS);
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}
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};
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template<typename _Class, typename _Member
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_GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class _Function_handler<void(_GLIBCXX_TEMPLATE_ARGS), _Member _Class::*>
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: public _Function_base::_Base_manager<
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_Simple_type_wrapper< _Member _Class::* > >
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{
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typedef _Member _Class::* _Functor;
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typedef _Simple_type_wrapper< _Functor > _Wrapper;
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typedef _Function_base::_Base_manager<_Wrapper> _Base;
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public:
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static bool
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_M_manager(_Any_data& __dest, const _Any_data& __source,
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_Manager_operation __op)
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{
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switch (__op) {
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case __get_type_info:
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__dest._M_access<const type_info*>() = &typeid(_Functor);
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break;
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case __get_functor_ptr:
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__dest._M_access<_Functor*>() =
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&_Base::_M_get_pointer(__source)->__value;
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break;
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default:
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_Base::_M_manager(__dest, __source, __op);
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}
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return false;
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}
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static void
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_M_invoke(const _Any_data& __functor _GLIBCXX_COMMA _GLIBCXX_PARAMS)
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{
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std::tr1::mem_fn(_Base::_M_get_pointer(__functor)->__value)
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(_GLIBCXX_ARGS);
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}
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};
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template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
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class function<_Res(_GLIBCXX_TEMPLATE_ARGS)>
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#if _GLIBCXX_NUM_ARGS == 1
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: public unary_function<_T1, _Res>, private _Function_base
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#elif _GLIBCXX_NUM_ARGS == 2
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: public binary_function<_T1, _T2, _Res>, private _Function_base
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#else
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: private _Function_base
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#endif
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{
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/**
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* @if maint
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* This class is used to implement the safe_bool idiom.
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* @endif
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*/
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struct _Hidden_type
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{
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_Hidden_type* _M_bool;
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};
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/**
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* @if maint
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* This typedef is used to implement the safe_bool idiom.
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* @endif
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*/
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typedef _Hidden_type* _Hidden_type::* _Safe_bool;
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typedef _Res _Signature_type(_GLIBCXX_TEMPLATE_ARGS);
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struct _Useless {};
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public:
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typedef _Res result_type;
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// [3.7.2.1] construct/copy/destroy
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/**
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* @brief Default construct creates an empty function call wrapper.
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* @post @c !(bool)*this
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*/
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function() : _Function_base() { }
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/**
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* @brief Default construct creates an empty function call wrapper.
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* @post @c !(bool)*this
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*/
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function(_M_clear_type*) : _Function_base() { }
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/**
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* @brief %Function copy constructor.
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* @param x A %function object with identical call signature.
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* @pre @c (bool)*this == (bool)x
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*
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* The newly-created %function contains a copy of the target of @a
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* x (if it has one).
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*/
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function(const function& __x);
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/**
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* @brief Builds a %function that targets a copy of the incoming
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* function object.
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* @param f A %function object that is callable with parameters of
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* type @c T1, @c T2, ..., @c TN and returns a value convertible
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* to @c Res.
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*
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* The newly-created %function object will target a copy of @a
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* f. If @a f is @c reference_wrapper<F>, then this function
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* object will contain a reference to the function object @c
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* f.get(). If @a f is a NULL function pointer or NULL
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* pointer-to-member, the newly-created object will be empty.
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*
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* If @a f is a non-NULL function pointer or an object of type @c
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* reference_wrapper<F>, this function will not throw.
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*/
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template<typename _Functor>
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function(_Functor __f,
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typename __enable_if<_Useless,
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!is_integral<_Functor>::value>::__type
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= _Useless());
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/**
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* @brief %Function assignment operator.
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* @param x A %function with identical call signature.
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* @post @c (bool)*this == (bool)x
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* @returns @c *this
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*
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* The target of @a x is copied to @c *this. If @a x has no
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* target, then @c *this will be empty.
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*
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* If @a x targets a function pointer or a reference to a function
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* object, then this operation will not throw an exception.
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*/
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function& operator=(const function& __x)
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{
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function(__x).swap(*this);
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return *this;
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}
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/**
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* @brief %Function assignment to zero.
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* @post @c !(bool)*this
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* @returns @c *this
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*
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* The target of @a *this is deallocated, leaving it empty.
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*/
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function& operator=(_M_clear_type*)
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{
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if (_M_manager) {
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_M_manager(_M_functor, _M_functor, __destroy_functor);
|
|
_M_manager = 0;
|
|
_M_invoker = 0;
|
|
}
|
|
return *this;
|
|
}
|
|
|
|
/**
|
|
* @brief %Function assignment to a new target.
|
|
* @param f A %function object that is callable with parameters of
|
|
* type @c T1, @c T2, ..., @c TN and returns a value convertible
|
|
* to @c Res.
|
|
* @return @c *this
|
|
*
|
|
* This %function object wrapper will target a copy of @a
|
|
* f. If @a f is @c reference_wrapper<F>, then this function
|
|
* object will contain a reference to the function object @c
|
|
* f.get(). If @a f is a NULL function pointer or NULL
|
|
* pointer-to-member, @c this object will be empty.
|
|
*
|
|
* If @a f is a non-NULL function pointer or an object of type @c
|
|
* reference_wrapper<F>, this function will not throw.
|
|
*/
|
|
template<typename _Functor>
|
|
typename __enable_if<function&, !is_integral<_Functor>::value>::__type
|
|
operator=(_Functor __f)
|
|
{
|
|
function(__f).swap(*this);
|
|
return *this;
|
|
}
|
|
|
|
// [3.7.2.2] function modifiers
|
|
|
|
/**
|
|
* @brief Swap the targets of two %function objects.
|
|
* @param f A %function with identical call signature.
|
|
*
|
|
* Swap the targets of @c this function object and @a f. This
|
|
* function will not throw an exception.
|
|
*/
|
|
void swap(function& __x)
|
|
{
|
|
_Any_data __old_functor = _M_functor;
|
|
_M_functor = __x._M_functor;
|
|
__x._M_functor = __old_functor;
|
|
_Manager_type __old_manager = _M_manager;
|
|
_M_manager = __x._M_manager;
|
|
__x._M_manager = __old_manager;
|
|
_Invoker_type __old_invoker = _M_invoker;
|
|
_M_invoker = __x._M_invoker;
|
|
__x._M_invoker = __old_invoker;
|
|
}
|
|
|
|
// [3.7.2.3] function capacity
|
|
|
|
/**
|
|
* @brief Determine if the %function wrapper has a target.
|
|
*
|
|
* @return @c true when this %function object contains a target,
|
|
* or @c false when it is empty.
|
|
*
|
|
* This function will not throw an exception.
|
|
*/
|
|
operator _Safe_bool() const
|
|
{
|
|
if (_M_empty())
|
|
{
|
|
return 0;
|
|
}
|
|
else
|
|
{
|
|
return &_Hidden_type::_M_bool;
|
|
}
|
|
}
|
|
|
|
// [3.7.2.4] function invocation
|
|
|
|
/**
|
|
* @brief Invokes the function targeted by @c *this.
|
|
* @returns the result of the target.
|
|
* @throws bad_function_call when @c !(bool)*this
|
|
*
|
|
* The function call operator invokes the target function object
|
|
* stored by @c this.
|
|
*/
|
|
_Res operator()(_GLIBCXX_PARAMS) const;
|
|
|
|
// [3.7.2.5] function target access
|
|
/**
|
|
* @brief Determine the type of the target of this function object
|
|
* wrapper.
|
|
*
|
|
* @returns the type identifier of the target function object, or
|
|
* @c typeid(void) if @c !(bool)*this.
|
|
*
|
|
* This function will not throw an exception.
|
|
*/
|
|
const type_info& target_type() const;
|
|
|
|
/**
|
|
* @brief Access the stored target function object.
|
|
*
|
|
* @return Returns a pointer to the stored target function object,
|
|
* if @c typeid(Functor).equals(target_type()); otherwise, a NULL
|
|
* pointer.
|
|
*
|
|
* This function will not throw an exception.
|
|
*/
|
|
template<typename _Functor> _Functor* target();
|
|
|
|
/**
|
|
* @overload
|
|
*/
|
|
template<typename _Functor> const _Functor* target() const;
|
|
|
|
private:
|
|
// [3.7.2.6] undefined operators
|
|
template<typename _Function>
|
|
void operator==(const function<_Function>&) const;
|
|
template<typename _Function>
|
|
void operator!=(const function<_Function>&) const;
|
|
|
|
typedef _Res (*_Invoker_type)(const _Any_data& _GLIBCXX_COMMA _GLIBCXX_PARAMS);
|
|
_Invoker_type _M_invoker;
|
|
};
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::function(const function& __x)
|
|
: _Function_base()
|
|
{
|
|
if (__x) {
|
|
_M_invoker = __x._M_invoker;
|
|
_M_manager = __x._M_manager;
|
|
__x._M_manager(_M_functor, __x._M_functor, __clone_functor);
|
|
}
|
|
}
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
template<typename _Functor>
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>
|
|
::function(_Functor __f,
|
|
typename __enable_if<_Useless,
|
|
!is_integral<_Functor>::value>::__type)
|
|
: _Function_base()
|
|
{
|
|
typedef _Function_handler<_Signature_type, _Functor> _My_handler;
|
|
if (_My_handler::_M_not_empty_function(__f)) {
|
|
_M_invoker = &_My_handler::_M_invoke;
|
|
_M_manager = &_My_handler::_M_manager;
|
|
_My_handler::_M_init_functor(_M_functor, __f);
|
|
}
|
|
}
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
_Res function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::operator()(_GLIBCXX_PARAMS) const
|
|
{
|
|
if (_M_empty())
|
|
{
|
|
#if __EXCEPTIONS
|
|
throw bad_function_call();
|
|
#else
|
|
std::abort();
|
|
#endif
|
|
}
|
|
return _M_invoker(_M_functor _GLIBCXX_COMMA _GLIBCXX_ARGS);
|
|
}
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
const type_info&
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target_type() const
|
|
{
|
|
if (_M_manager)
|
|
{
|
|
_Any_data __typeinfo_result;
|
|
_M_manager(__typeinfo_result, _M_functor, __get_type_info);
|
|
return *__typeinfo_result._M_access<const type_info*>();
|
|
}
|
|
else
|
|
{
|
|
return typeid(void);
|
|
}
|
|
}
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
template<typename _Functor>
|
|
_Functor*
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target()
|
|
{
|
|
if (typeid(_Functor) == target_type() && _M_manager)
|
|
{
|
|
_Any_data __ptr;
|
|
if (_M_manager(__ptr, _M_functor, __get_functor_ptr)
|
|
&& !is_const<_Functor>::value)
|
|
return 0;
|
|
else
|
|
return __ptr._M_access<_Functor*>();
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|
|
template<typename _Res _GLIBCXX_COMMA _GLIBCXX_TEMPLATE_PARAMS>
|
|
template<typename _Functor>
|
|
const _Functor*
|
|
function<_Res(_GLIBCXX_TEMPLATE_ARGS)>::target() const
|
|
{
|
|
if (typeid(_Functor) == target_type() && _M_manager)
|
|
{
|
|
_Any_data __ptr;
|
|
_M_manager(__ptr, _M_functor, __get_functor_ptr);
|
|
return __ptr._M_access<const _Functor*>();
|
|
}
|
|
else
|
|
{
|
|
return 0;
|
|
}
|
|
}
|
|
|