2295 lines
65 KiB
Plaintext
2295 lines
65 KiB
Plaintext
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// TR1 functional header -*- C++ -*-
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// Copyright (C) 2007 Free Software Foundation, Inc.
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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 tr1_impl/functional
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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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namespace std
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{
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_GLIBCXX_BEGIN_NAMESPACE_TR1
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template<typename _MemberPointer>
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class _Mem_fn;
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/**
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* @if maint
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* Actual implementation of _Has_result_type, which uses SFINAE to
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* determine if the type _Tp has a publicly-accessible member type
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* result_type.
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* @endif
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*/
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template<typename _Tp>
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class _Has_result_type_helper : __sfinae_types
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{
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template<typename _Up>
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struct _Wrap_type
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{ };
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template<typename _Up>
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static __one __test(_Wrap_type<typename _Up::result_type>*);
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template<typename _Up>
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static __two __test(...);
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public:
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static const bool value = sizeof(__test<_Tp>(0)) == 1;
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};
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template<typename _Tp>
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struct _Has_result_type
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: integral_constant<bool,
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_Has_result_type_helper<typename remove_cv<_Tp>::type>::value>
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{ };
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/**
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* @if maint
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* If we have found a result_type, extract it.
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* @endif
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*/
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template<bool _Has_result_type, typename _Functor>
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struct _Maybe_get_result_type
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{ };
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template<typename _Functor>
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struct _Maybe_get_result_type<true, _Functor>
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{
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typedef typename _Functor::result_type result_type;
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};
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/**
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* @if maint
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* Base class for any function object that has a weak result type, as
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* defined in 3.3/3 of TR1.
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* @endif
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*/
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template<typename _Functor>
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struct _Weak_result_type_impl
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: _Maybe_get_result_type<_Has_result_type<_Functor>::value, _Functor>
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{
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};
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/**
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* @if maint
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* Retrieve the result type for a function type.
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* @endif
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*/
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template<typename _Res, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res(_ArgTypes...)>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve the result type for a function reference.
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* @endif
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*/
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template<typename _Res, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res(&)(_ArgTypes...)>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve the result type for a function pointer.
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* @endif
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*/
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template<typename _Res, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res(*)(_ArgTypes...)>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve result type for a member function pointer.
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* @endif maint
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*/
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template<typename _Res, typename _Class, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...)>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve result type for a const member function pointer.
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* @endif maint
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*/
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template<typename _Res, typename _Class, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) const>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve result type for a volatile member function pointer.
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* @endif maint
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*/
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template<typename _Res, typename _Class, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) volatile>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Retrieve result type for a const volatile member function pointer.
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* @endif maint
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*/
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template<typename _Res, typename _Class, typename... _ArgTypes>
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struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...)const volatile>
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{
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typedef _Res result_type;
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};
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/**
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* @if maint
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* Strip top-level cv-qualifiers from the function object and let
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* _Weak_result_type_impl perform the real work.
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* @endif
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*/
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template<typename _Functor>
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struct _Weak_result_type
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: _Weak_result_type_impl<typename remove_cv<_Functor>::type>
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{
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};
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template<typename _Signature>
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class result_of;
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/**
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* @if maint
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* Actual implementation of result_of. When _Has_result_type is
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* true, gets its result from _Weak_result_type. Otherwise, uses
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* the function object's member template result to extract the
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* result type.
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* @endif
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*/
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template<bool _Has_result_type, typename _Signature>
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struct _Result_of_impl;
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// Handle member data pointers using _Mem_fn's logic
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template<typename _Res, typename _Class, typename _T1>
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struct _Result_of_impl<false, _Res _Class::*(_T1)>
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{
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typedef typename _Mem_fn<_Res _Class::*>
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::template _Result_type<_T1>::type type;
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};
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/**
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* @if maint
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* Determine whether we can determine a result type from @c Functor
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* alone.
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* @endif
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*/
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template<typename _Functor, typename... _ArgTypes>
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class result_of<_Functor(_ArgTypes...)>
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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(_ArgTypes...)>
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{
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};
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/**
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* @if maint
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* We already know the result type for @c Functor; use it.
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* @endif
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*/
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template<typename _Functor, typename... _ArgTypes>
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struct _Result_of_impl<true, _Functor(_ArgTypes...)>
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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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/**
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* @if maint
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* We need to compute the result type for this invocation the hard
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* way.
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* @endif
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*/
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template<typename _Functor, typename... _ArgTypes>
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struct _Result_of_impl<false, _Functor(_ArgTypes...)>
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{
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typedef typename _Functor
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::template result<_Functor(_ArgTypes...)>::type type;
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};
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/**
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* @if maint
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* It is unsafe to access ::result when there are zero arguments, so we
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* return @c void instead.
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* @endif
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*/
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template<typename _Functor>
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struct _Result_of_impl<false, _Functor()>
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{
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typedef void type;
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};
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/**
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* @if maint
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* Determines if the type _Tp derives from unary_function.
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* @endif
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*/
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template<typename _Tp>
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struct _Derives_from_unary_function : __sfinae_types
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{
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private:
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template<typename _T1, typename _Res>
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static __one __test(const volatile unary_function<_T1, _Res>*);
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// It's tempting to change "..." to const volatile void*, but
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// that fails when _Tp is a function type.
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static __two __test(...);
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public:
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static const bool value = sizeof(__test((_Tp*)0)) == 1;
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};
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/**
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* @if maint
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* Determines if the type _Tp derives from binary_function.
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* @endif
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*/
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template<typename _Tp>
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struct _Derives_from_binary_function : __sfinae_types
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{
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private:
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template<typename _T1, typename _T2, typename _Res>
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static __one __test(const volatile binary_function<_T1, _T2, _Res>*);
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// It's tempting to change "..." to const volatile void*, but
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// that fails when _Tp is a function type.
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static __two __test(...);
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public:
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static const bool value = sizeof(__test((_Tp*)0)) == 1;
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};
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/**
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* @if maint
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* Turns a function type into a function pointer type
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* @endif
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*/
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template<typename _Tp, bool _IsFunctionType = is_function<_Tp>::value>
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struct _Function_to_function_pointer
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{
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typedef _Tp type;
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};
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template<typename _Tp>
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struct _Function_to_function_pointer<_Tp, true>
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{
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typedef _Tp* type;
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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, typename... _Args>
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inline
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typename __gnu_cxx::__enable_if<
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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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typename result_of<_Functor(_Args...)>::type
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>::__type
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__invoke(_Functor& __f, _Args&... __args)
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{
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return __f(__args...);
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}
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template<typename _Functor, typename... _Args>
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inline
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typename __gnu_cxx::__enable_if<
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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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typename result_of<_Functor(_Args...)>::type
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>::__type
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__invoke(_Functor& __f, _Args&... __args)
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{
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return mem_fn(__f)(__args...);
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}
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// To pick up function references (that will become function pointers)
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template<typename _Functor, typename... _Args>
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inline
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typename __gnu_cxx::__enable_if<
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(is_pointer<_Functor>::value
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&& is_function<typename remove_pointer<_Functor>::type>::value),
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typename result_of<_Functor(_Args...)>::type
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>::__type
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__invoke(_Functor __f, _Args&... __args)
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{
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return __f(__args...);
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}
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|
|
|
||
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/**
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* @if maint
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||
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* Knowing which of unary_function and binary_function _Tp derives
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* from, derives from the same and ensures that reference_wrapper
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* will have a weak result type. See cases below.
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* @endif
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*/
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template<bool _Unary, bool _Binary, typename _Tp>
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struct _Reference_wrapper_base_impl;
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// Not a unary_function or binary_function, so try a weak result type
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template<typename _Tp>
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struct _Reference_wrapper_base_impl<false, false, _Tp>
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|
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: _Weak_result_type<_Tp>
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{ };
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// unary_function but not binary_function
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template<typename _Tp>
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struct _Reference_wrapper_base_impl<true, false, _Tp>
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|
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: unary_function<typename _Tp::argument_type,
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typename _Tp::result_type>
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{ };
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||
|
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|
||
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// binary_function but not unary_function
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||
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template<typename _Tp>
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||
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struct _Reference_wrapper_base_impl<false, true, _Tp>
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||
|
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: binary_function<typename _Tp::first_argument_type,
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typename _Tp::second_argument_type,
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typename _Tp::result_type>
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||
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{ };
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||
|
|
|
||
|
|
// both unary_function and binary_function. import result_type to
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||
|
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// avoid conflicts.
|
||
|
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template<typename _Tp>
|
||
|
|
struct _Reference_wrapper_base_impl<true, true, _Tp>
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||
|
|
: unary_function<typename _Tp::argument_type,
|
||
|
|
typename _Tp::result_type>,
|
||
|
|
binary_function<typename _Tp::first_argument_type,
|
||
|
|
typename _Tp::second_argument_type,
|
||
|
|
typename _Tp::result_type>
|
||
|
|
{
|
||
|
|
typedef typename _Tp::result_type result_type;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Derives from unary_function or binary_function when it
|
||
|
|
* can. Specializations handle all of the easy cases. The primary
|
||
|
|
* template determines what to do with a class type, which may
|
||
|
|
* derive from both unary_function and binary_function.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
struct _Reference_wrapper_base
|
||
|
|
: _Reference_wrapper_base_impl<
|
||
|
|
_Derives_from_unary_function<_Tp>::value,
|
||
|
|
_Derives_from_binary_function<_Tp>::value,
|
||
|
|
_Tp>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a function type (unary)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res(_T1)>
|
||
|
|
: unary_function<_T1, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a function type (binary)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res(_T1, _T2)>
|
||
|
|
: binary_function<_T1, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a function pointer type (unary)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res(*)(_T1)>
|
||
|
|
: unary_function<_T1, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a function pointer type (binary)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res(*)(_T1, _T2)>
|
||
|
|
: binary_function<_T1, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (unary, no qualifiers)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)()>
|
||
|
|
: unary_function<_T1*, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (binary, no qualifiers)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)(_T2)>
|
||
|
|
: binary_function<_T1*, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (unary, const)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)() const>
|
||
|
|
: unary_function<const _T1*, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (binary, const)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const>
|
||
|
|
: binary_function<const _T1*, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (unary, volatile)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)() volatile>
|
||
|
|
: unary_function<volatile _T1*, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (binary, volatile)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)(_T2) volatile>
|
||
|
|
: binary_function<volatile _T1*, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (unary, const volatile)
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)() const volatile>
|
||
|
|
: unary_function<const volatile _T1*, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
// - a pointer to member function type (binary, const volatile)
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const volatile>
|
||
|
|
: binary_function<const volatile _T1*, _T2, _Res>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
class reference_wrapper
|
||
|
|
: public _Reference_wrapper_base<typename remove_cv<_Tp>::type>
|
||
|
|
{
|
||
|
|
// If _Tp is a function type, we can't form result_of<_Tp(...)>,
|
||
|
|
// so turn it into a function pointer type.
|
||
|
|
typedef typename _Function_to_function_pointer<_Tp>::type
|
||
|
|
_M_func_type;
|
||
|
|
|
||
|
|
_Tp* _M_data;
|
||
|
|
public:
|
||
|
|
typedef _Tp type;
|
||
|
|
|
||
|
|
explicit
|
||
|
|
reference_wrapper(_Tp& __indata): _M_data(&__indata)
|
||
|
|
{ }
|
||
|
|
|
||
|
|
reference_wrapper(const reference_wrapper<_Tp>& __inref):
|
||
|
|
_M_data(__inref._M_data)
|
||
|
|
{ }
|
||
|
|
|
||
|
|
reference_wrapper&
|
||
|
|
operator=(const reference_wrapper<_Tp>& __inref)
|
||
|
|
{
|
||
|
|
_M_data = __inref._M_data;
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
operator _Tp&() const
|
||
|
|
{ return this->get(); }
|
||
|
|
|
||
|
|
_Tp&
|
||
|
|
get() const
|
||
|
|
{ return *_M_data; }
|
||
|
|
|
||
|
|
template<typename... _Args>
|
||
|
|
typename result_of<_M_func_type(_Args...)>::type
|
||
|
|
operator()(_Args&... __args) const
|
||
|
|
{
|
||
|
|
return __invoke(get(), __args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
// Denotes a reference should be taken to a variable.
|
||
|
|
template<typename _Tp>
|
||
|
|
inline reference_wrapper<_Tp>
|
||
|
|
ref(_Tp& __t)
|
||
|
|
{ return reference_wrapper<_Tp>(__t); }
|
||
|
|
|
||
|
|
// Denotes a const reference should be taken to a variable.
|
||
|
|
template<typename _Tp>
|
||
|
|
inline reference_wrapper<const _Tp>
|
||
|
|
cref(const _Tp& __t)
|
||
|
|
{ return reference_wrapper<const _Tp>(__t); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
inline reference_wrapper<_Tp>
|
||
|
|
ref(reference_wrapper<_Tp> __t)
|
||
|
|
{ return ref(__t.get()); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
inline reference_wrapper<const _Tp>
|
||
|
|
cref(reference_wrapper<_Tp> __t)
|
||
|
|
{ return cref(__t.get()); }
|
||
|
|
|
||
|
|
template<typename _Tp, bool>
|
||
|
|
struct _Mem_fn_const_or_non
|
||
|
|
{
|
||
|
|
typedef const _Tp& type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
struct _Mem_fn_const_or_non<_Tp, false>
|
||
|
|
{
|
||
|
|
typedef _Tp& type;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Derives from @c unary_function or @c binary_function, or perhaps
|
||
|
|
* nothing, depending on the number of arguments provided. The
|
||
|
|
* primary template is the basis case, which derives nothing.
|
||
|
|
* @endif maint
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename... _ArgTypes>
|
||
|
|
struct _Maybe_unary_or_binary_function { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Derives from @c unary_function, as appropriate.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _T1>
|
||
|
|
struct _Maybe_unary_or_binary_function<_Res, _T1>
|
||
|
|
: std::unary_function<_T1, _Res> { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Derives from @c binary_function, as appropriate.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _T1, typename _T2>
|
||
|
|
struct _Maybe_unary_or_binary_function<_Res, _T1, _T2>
|
||
|
|
: std::binary_function<_T1, _T2, _Res> { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation of @c mem_fn for member function pointers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _Class, typename... _ArgTypes>
|
||
|
|
class _Mem_fn<_Res (_Class::*)(_ArgTypes...)>
|
||
|
|
: public _Maybe_unary_or_binary_function<_Res, _Class*, _ArgTypes...>
|
||
|
|
{
|
||
|
|
typedef _Res (_Class::*_Functor)(_ArgTypes...);
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __object, const volatile _Class *,
|
||
|
|
_ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||
|
|
{ return ((*__ptr).*__pmf)(__args...); }
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Res result_type;
|
||
|
|
|
||
|
|
explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
|
||
|
|
|
||
|
|
// Handle objects
|
||
|
|
_Res
|
||
|
|
operator()(_Class& __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle pointers
|
||
|
|
_Res
|
||
|
|
operator()(_Class* __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object->*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle smart pointers, references and pointers to derived
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
operator()(_Tp& __object, _ArgTypes... __args) const
|
||
|
|
{ return _M_call(__object, &__object, __args...); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
_Functor __pmf;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation of @c mem_fn for const member function pointers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _Class, typename... _ArgTypes>
|
||
|
|
class _Mem_fn<_Res (_Class::*)(_ArgTypes...) const>
|
||
|
|
: public _Maybe_unary_or_binary_function<_Res, const _Class*,
|
||
|
|
_ArgTypes...>
|
||
|
|
{
|
||
|
|
typedef _Res (_Class::*_Functor)(_ArgTypes...) const;
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __object, const volatile _Class *,
|
||
|
|
_ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||
|
|
{ return ((*__ptr).*__pmf)(__args...); }
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Res result_type;
|
||
|
|
|
||
|
|
explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
|
||
|
|
|
||
|
|
// Handle objects
|
||
|
|
_Res
|
||
|
|
operator()(const _Class& __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle pointers
|
||
|
|
_Res
|
||
|
|
operator()(const _Class* __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object->*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle smart pointers, references and pointers to derived
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res operator()(_Tp& __object, _ArgTypes... __args) const
|
||
|
|
{ return _M_call(__object, &__object, __args...); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
_Functor __pmf;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation of @c mem_fn for volatile member function pointers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _Class, typename... _ArgTypes>
|
||
|
|
class _Mem_fn<_Res (_Class::*)(_ArgTypes...) volatile>
|
||
|
|
: public _Maybe_unary_or_binary_function<_Res, volatile _Class*,
|
||
|
|
_ArgTypes...>
|
||
|
|
{
|
||
|
|
typedef _Res (_Class::*_Functor)(_ArgTypes...) volatile;
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __object, const volatile _Class *,
|
||
|
|
_ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||
|
|
{ return ((*__ptr).*__pmf)(__args...); }
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Res result_type;
|
||
|
|
|
||
|
|
explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
|
||
|
|
|
||
|
|
// Handle objects
|
||
|
|
_Res
|
||
|
|
operator()(volatile _Class& __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle pointers
|
||
|
|
_Res
|
||
|
|
operator()(volatile _Class* __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object->*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle smart pointers, references and pointers to derived
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
operator()(_Tp& __object, _ArgTypes... __args) const
|
||
|
|
{ return _M_call(__object, &__object, __args...); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
_Functor __pmf;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation of @c mem_fn for const volatile member function pointers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Res, typename _Class, typename... _ArgTypes>
|
||
|
|
class _Mem_fn<_Res (_Class::*)(_ArgTypes...) const volatile>
|
||
|
|
: public _Maybe_unary_or_binary_function<_Res, const volatile _Class*,
|
||
|
|
_ArgTypes...>
|
||
|
|
{
|
||
|
|
typedef _Res (_Class::*_Functor)(_ArgTypes...) const volatile;
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __object, const volatile _Class *,
|
||
|
|
_ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res
|
||
|
|
_M_call(_Tp& __ptr, const volatile void *, _ArgTypes... __args) const
|
||
|
|
{ return ((*__ptr).*__pmf)(__args...); }
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Res result_type;
|
||
|
|
|
||
|
|
explicit _Mem_fn(_Functor __pmf) : __pmf(__pmf) { }
|
||
|
|
|
||
|
|
// Handle objects
|
||
|
|
_Res
|
||
|
|
operator()(const volatile _Class& __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object.*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle pointers
|
||
|
|
_Res
|
||
|
|
operator()(const volatile _Class* __object, _ArgTypes... __args) const
|
||
|
|
{ return (__object->*__pmf)(__args...); }
|
||
|
|
|
||
|
|
// Handle smart pointers, references and pointers to derived
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res operator()(_Tp& __object, _ArgTypes... __args) const
|
||
|
|
{ return _M_call(__object, &__object, __args...); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
_Functor __pmf;
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
template<typename _Res, typename _Class>
|
||
|
|
class _Mem_fn<_Res _Class::*>
|
||
|
|
{
|
||
|
|
// This bit of genius is due to Peter Dimov, improved slightly by
|
||
|
|
// Douglas Gregor.
|
||
|
|
template<typename _Tp>
|
||
|
|
_Res&
|
||
|
|
_M_call(_Tp& __object, _Class *) const
|
||
|
|
{ return __object.*__pm; }
|
||
|
|
|
||
|
|
template<typename _Tp, typename _Up>
|
||
|
|
_Res&
|
||
|
|
_M_call(_Tp& __object, _Up * const *) const
|
||
|
|
{ return (*__object).*__pm; }
|
||
|
|
|
||
|
|
template<typename _Tp, typename _Up>
|
||
|
|
const _Res&
|
||
|
|
_M_call(_Tp& __object, const _Up * const *) const
|
||
|
|
{ return (*__object).*__pm; }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
const _Res&
|
||
|
|
_M_call(_Tp& __object, const _Class *) const
|
||
|
|
{ return __object.*__pm; }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
const _Res&
|
||
|
|
_M_call(_Tp& __ptr, const volatile void*) const
|
||
|
|
{ return (*__ptr).*__pm; }
|
||
|
|
|
||
|
|
template<typename _Tp> static _Tp& __get_ref();
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
static __sfinae_types::__one __check_const(_Tp&, _Class*);
|
||
|
|
template<typename _Tp, typename _Up>
|
||
|
|
static __sfinae_types::__one __check_const(_Tp&, _Up * const *);
|
||
|
|
template<typename _Tp, typename _Up>
|
||
|
|
static __sfinae_types::__two __check_const(_Tp&, const _Up * const *);
|
||
|
|
template<typename _Tp>
|
||
|
|
static __sfinae_types::__two __check_const(_Tp&, const _Class*);
|
||
|
|
template<typename _Tp>
|
||
|
|
static __sfinae_types::__two __check_const(_Tp&, const volatile void*);
|
||
|
|
|
||
|
|
public:
|
||
|
|
template<typename _Tp>
|
||
|
|
struct _Result_type
|
||
|
|
: _Mem_fn_const_or_non<_Res,
|
||
|
|
(sizeof(__sfinae_types::__two)
|
||
|
|
== sizeof(__check_const<_Tp>(__get_ref<_Tp>(), (_Tp*)0)))>
|
||
|
|
{ };
|
||
|
|
|
||
|
|
template<typename _Signature>
|
||
|
|
struct result;
|
||
|
|
|
||
|
|
template<typename _CVMem, typename _Tp>
|
||
|
|
struct result<_CVMem(_Tp)>
|
||
|
|
: public _Result_type<_Tp> { };
|
||
|
|
|
||
|
|
template<typename _CVMem, typename _Tp>
|
||
|
|
struct result<_CVMem(_Tp&)>
|
||
|
|
: public _Result_type<_Tp> { };
|
||
|
|
|
||
|
|
explicit
|
||
|
|
_Mem_fn(_Res _Class::*__pm) : __pm(__pm) { }
|
||
|
|
|
||
|
|
// Handle objects
|
||
|
|
_Res&
|
||
|
|
operator()(_Class& __object) const
|
||
|
|
{ return __object.*__pm; }
|
||
|
|
|
||
|
|
const _Res&
|
||
|
|
operator()(const _Class& __object) const
|
||
|
|
{ return __object.*__pm; }
|
||
|
|
|
||
|
|
// Handle pointers
|
||
|
|
_Res&
|
||
|
|
operator()(_Class* __object) const
|
||
|
|
{ return __object->*__pm; }
|
||
|
|
|
||
|
|
const _Res&
|
||
|
|
operator()(const _Class* __object) const
|
||
|
|
{ return __object->*__pm; }
|
||
|
|
|
||
|
|
// Handle smart pointers and derived
|
||
|
|
template<typename _Tp>
|
||
|
|
typename _Result_type<_Tp>::type
|
||
|
|
operator()(_Tp& __unknown) const
|
||
|
|
{ return _M_call(__unknown, &__unknown); }
|
||
|
|
|
||
|
|
private:
|
||
|
|
_Res _Class::*__pm;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Returns a function object that forwards to the member
|
||
|
|
* pointer @a pm.
|
||
|
|
*/
|
||
|
|
template<typename _Tp, typename _Class>
|
||
|
|
inline _Mem_fn<_Tp _Class::*>
|
||
|
|
mem_fn(_Tp _Class::* __pm)
|
||
|
|
{
|
||
|
|
return _Mem_fn<_Tp _Class::*>(__pm);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Determines if the given type _Tp is a function object
|
||
|
|
* should be treated as a subexpression when evaluating calls to
|
||
|
|
* function objects returned by bind(). [TR1 3.6.1]
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
struct is_bind_expression
|
||
|
|
{ static const bool value = false; };
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
const bool is_bind_expression<_Tp>::value;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Determines if the given type _Tp is a placeholder in a
|
||
|
|
* bind() expression and, if so, which placeholder it is. [TR1 3.6.2]
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
struct is_placeholder
|
||
|
|
{ static const int value = 0; };
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
const int is_placeholder<_Tp>::value;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* The type of placeholder objects defined by libstdc++.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<int _Num> struct _Placeholder { };
|
||
|
|
|
||
|
|
// Define a large number of placeholders. There is no way to
|
||
|
|
// simplify this with variadic templates, because we're introducing
|
||
|
|
// unique names for each.
|
||
|
|
namespace placeholders { namespace {
|
||
|
|
_Placeholder<1> _1;
|
||
|
|
_Placeholder<2> _2;
|
||
|
|
_Placeholder<3> _3;
|
||
|
|
_Placeholder<4> _4;
|
||
|
|
_Placeholder<5> _5;
|
||
|
|
_Placeholder<6> _6;
|
||
|
|
_Placeholder<7> _7;
|
||
|
|
_Placeholder<8> _8;
|
||
|
|
_Placeholder<9> _9;
|
||
|
|
_Placeholder<10> _10;
|
||
|
|
_Placeholder<11> _11;
|
||
|
|
_Placeholder<12> _12;
|
||
|
|
_Placeholder<13> _13;
|
||
|
|
_Placeholder<14> _14;
|
||
|
|
_Placeholder<15> _15;
|
||
|
|
_Placeholder<16> _16;
|
||
|
|
_Placeholder<17> _17;
|
||
|
|
_Placeholder<18> _18;
|
||
|
|
_Placeholder<19> _19;
|
||
|
|
_Placeholder<20> _20;
|
||
|
|
_Placeholder<21> _21;
|
||
|
|
_Placeholder<22> _22;
|
||
|
|
_Placeholder<23> _23;
|
||
|
|
_Placeholder<24> _24;
|
||
|
|
_Placeholder<25> _25;
|
||
|
|
_Placeholder<26> _26;
|
||
|
|
_Placeholder<27> _27;
|
||
|
|
_Placeholder<28> _28;
|
||
|
|
_Placeholder<29> _29;
|
||
|
|
} }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Partial specialization of is_placeholder that provides the placeholder
|
||
|
|
* number for the placeholder objects defined by libstdc++.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<int _Num>
|
||
|
|
struct is_placeholder<_Placeholder<_Num> >
|
||
|
|
{ static const int value = _Num; };
|
||
|
|
|
||
|
|
template<int _Num>
|
||
|
|
const int is_placeholder<_Placeholder<_Num> >::value;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Stores a tuple of indices. Used by bind() to extract the elements
|
||
|
|
* in a tuple.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<int... _Indexes>
|
||
|
|
struct _Index_tuple { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Builds an _Index_tuple<0, 1, 2, ..., _Num-1>.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<std::size_t _Num, typename _Tuple = _Index_tuple<> >
|
||
|
|
struct _Build_index_tuple;
|
||
|
|
|
||
|
|
template<std::size_t _Num, int... _Indexes>
|
||
|
|
struct _Build_index_tuple<_Num, _Index_tuple<_Indexes...> >
|
||
|
|
: _Build_index_tuple<_Num - 1,
|
||
|
|
_Index_tuple<_Indexes..., sizeof...(_Indexes)> >
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
template<int... _Indexes>
|
||
|
|
struct _Build_index_tuple<0, _Index_tuple<_Indexes...> >
|
||
|
|
{
|
||
|
|
typedef _Index_tuple<_Indexes...> __type;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Used by _Safe_tuple_element to indicate that there is no tuple
|
||
|
|
* element at this position.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
struct _No_tuple_element;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation helper for _Safe_tuple_element. This primary
|
||
|
|
* template handles the case where it is safe to use @c
|
||
|
|
* tuple_element.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<int __i, typename _Tuple, bool _IsSafe>
|
||
|
|
struct _Safe_tuple_element_impl
|
||
|
|
: tuple_element<__i, _Tuple> { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Implementation helper for _Safe_tuple_element. This partial
|
||
|
|
* specialization handles the case where it is not safe to use @c
|
||
|
|
* tuple_element. We just return @c _No_tuple_element.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<int __i, typename _Tuple>
|
||
|
|
struct _Safe_tuple_element_impl<__i, _Tuple, false>
|
||
|
|
{
|
||
|
|
typedef _No_tuple_element type;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* Like tuple_element, but returns @c _No_tuple_element when
|
||
|
|
* tuple_element would return an error.
|
||
|
|
*/
|
||
|
|
template<int __i, typename _Tuple>
|
||
|
|
struct _Safe_tuple_element
|
||
|
|
: _Safe_tuple_element_impl<__i, _Tuple,
|
||
|
|
(__i >= 0 && __i < tuple_size<_Tuple>::value)>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Maps an argument to bind() into an actual argument to the bound
|
||
|
|
* function object [TR1 3.6.3/5]. Only the first parameter should
|
||
|
|
* be specified: the rest are used to determine among the various
|
||
|
|
* implementations. Note that, although this class is a function
|
||
|
|
* object, isn't not entirely normal because it takes only two
|
||
|
|
* parameters regardless of the number of parameters passed to the
|
||
|
|
* bind expression. The first parameter is the bound argument and
|
||
|
|
* the second parameter is a tuple containing references to the
|
||
|
|
* rest of the arguments.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Arg,
|
||
|
|
bool _IsBindExp = is_bind_expression<_Arg>::value,
|
||
|
|
bool _IsPlaceholder = (is_placeholder<_Arg>::value > 0)>
|
||
|
|
class _Mu;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* If the argument is reference_wrapper<_Tp>, returns the
|
||
|
|
* underlying reference. [TR1 3.6.3/5 bullet 1]
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
class _Mu<reference_wrapper<_Tp>, false, false>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
typedef _Tp& result_type;
|
||
|
|
|
||
|
|
/* Note: This won't actually work for const volatile
|
||
|
|
* reference_wrappers, because reference_wrapper::get() is const
|
||
|
|
* but not volatile-qualified. This might be a defect in the TR.
|
||
|
|
*/
|
||
|
|
template<typename _CVRef, typename _Tuple>
|
||
|
|
result_type
|
||
|
|
operator()(_CVRef& __arg, const _Tuple&) const volatile
|
||
|
|
{ return __arg.get(); }
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* If the argument is a bind expression, we invoke the underlying
|
||
|
|
* function object with the same cv-qualifiers as we are given and
|
||
|
|
* pass along all of our arguments (unwrapped). [TR1 3.6.3/5 bullet 2]
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Arg>
|
||
|
|
class _Mu<_Arg, true, false>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template<typename _Signature> class result;
|
||
|
|
|
||
|
|
// Determine the result type when we pass the arguments along. This
|
||
|
|
// involves passing along the cv-qualifiers placed on _Mu and
|
||
|
|
// unwrapping the argument bundle.
|
||
|
|
template<typename _CVMu, typename _CVArg, typename... _Args>
|
||
|
|
class result<_CVMu(_CVArg, tuple<_Args...>)>
|
||
|
|
: public result_of<_CVArg(_Args...)> { };
|
||
|
|
|
||
|
|
template<typename _CVArg, typename... _Args>
|
||
|
|
typename result_of<_CVArg(_Args...)>::type
|
||
|
|
operator()(_CVArg& __arg,
|
||
|
|
const tuple<_Args...>& __tuple) const volatile
|
||
|
|
{
|
||
|
|
// Construct an index tuple and forward to __call
|
||
|
|
typedef typename _Build_index_tuple<sizeof...(_Args)>::__type
|
||
|
|
_Indexes;
|
||
|
|
return this->__call(__arg, __tuple, _Indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
// Invokes the underlying function object __arg by unpacking all
|
||
|
|
// of the arguments in the tuple.
|
||
|
|
template<typename _CVArg, typename... _Args, int... _Indexes>
|
||
|
|
typename result_of<_CVArg(_Args...)>::type
|
||
|
|
__call(_CVArg& __arg, const tuple<_Args...>& __tuple,
|
||
|
|
const _Index_tuple<_Indexes...>&) const volatile
|
||
|
|
{
|
||
|
|
return __arg(_GLIBCXX_TR1 get<_Indexes>(__tuple)...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* If the argument is a placeholder for the Nth argument, returns
|
||
|
|
* a reference to the Nth argument to the bind function object.
|
||
|
|
* [TR1 3.6.3/5 bullet 3]
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Arg>
|
||
|
|
class _Mu<_Arg, false, true>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template<typename _Signature> class result;
|
||
|
|
|
||
|
|
template<typename _CVMu, typename _CVArg, typename _Tuple>
|
||
|
|
class result<_CVMu(_CVArg, _Tuple)>
|
||
|
|
{
|
||
|
|
// Add a reference, if it hasn't already been done for us.
|
||
|
|
// This allows us to be a little bit sloppy in constructing
|
||
|
|
// the tuple that we pass to result_of<...>.
|
||
|
|
typedef typename _Safe_tuple_element<(is_placeholder<_Arg>::value
|
||
|
|
- 1), _Tuple>::type
|
||
|
|
__base_type;
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef typename add_reference<__base_type>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Tuple>
|
||
|
|
typename result<_Mu(_Arg, _Tuple)>::type
|
||
|
|
operator()(const volatile _Arg&, const _Tuple& __tuple) const volatile
|
||
|
|
{
|
||
|
|
return ::std::_GLIBCXX_TR1 get<(is_placeholder<_Arg>::value
|
||
|
|
- 1)>(__tuple);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* If the argument is just a value, returns a reference to that
|
||
|
|
* value. The cv-qualifiers on the reference are the same as the
|
||
|
|
* cv-qualifiers on the _Mu object. [TR1 3.6.3/5 bullet 4]
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Arg>
|
||
|
|
class _Mu<_Arg, false, false>
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
template<typename _Signature> struct result;
|
||
|
|
|
||
|
|
template<typename _CVMu, typename _CVArg, typename _Tuple>
|
||
|
|
struct result<_CVMu(_CVArg, _Tuple)>
|
||
|
|
{
|
||
|
|
typedef typename add_reference<_CVArg>::type type;
|
||
|
|
};
|
||
|
|
|
||
|
|
// Pick up the cv-qualifiers of the argument
|
||
|
|
template<typename _CVArg, typename _Tuple>
|
||
|
|
_CVArg&
|
||
|
|
operator()(_CVArg& __arg, const _Tuple&) const volatile
|
||
|
|
{ return __arg; }
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Maps member pointers into instances of _Mem_fn but leaves all
|
||
|
|
* other function objects untouched. Used by tr1::bind(). The
|
||
|
|
* primary template handles the non--member-pointer case.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
struct _Maybe_wrap_member_pointer
|
||
|
|
{
|
||
|
|
typedef _Tp type;
|
||
|
|
|
||
|
|
static const _Tp&
|
||
|
|
__do_wrap(const _Tp& __x)
|
||
|
|
{ return __x; }
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Maps member pointers into instances of _Mem_fn but leaves all
|
||
|
|
* other function objects untouched. Used by tr1::bind(). This
|
||
|
|
* partial specialization handles the member pointer case.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Tp, typename _Class>
|
||
|
|
struct _Maybe_wrap_member_pointer<_Tp _Class::*>
|
||
|
|
{
|
||
|
|
typedef _Mem_fn<_Tp _Class::*> type;
|
||
|
|
|
||
|
|
static type
|
||
|
|
__do_wrap(_Tp _Class::* __pm)
|
||
|
|
{ return type(__pm); }
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Type of the function object returned from bind().
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
struct _Bind;
|
||
|
|
|
||
|
|
template<typename _Functor, typename... _Bound_args>
|
||
|
|
class _Bind<_Functor(_Bound_args...)>
|
||
|
|
: public _Weak_result_type<_Functor>
|
||
|
|
{
|
||
|
|
typedef _Bind __self_type;
|
||
|
|
typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type
|
||
|
|
_Bound_indexes;
|
||
|
|
|
||
|
|
_Functor _M_f;
|
||
|
|
tuple<_Bound_args...> _M_bound_args;
|
||
|
|
|
||
|
|
// Call unqualified
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
typename result_of<
|
||
|
|
_Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(_Bound_args, tuple<_Args...>)>::type...)
|
||
|
|
>::type
|
||
|
|
__call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>)
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
typename result_of<
|
||
|
|
const _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(const _Bound_args, tuple<_Args...>)
|
||
|
|
>::type...)>::type
|
||
|
|
__call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) const
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as volatile
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
typename result_of<
|
||
|
|
volatile _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(volatile _Bound_args, tuple<_Args...>)
|
||
|
|
>::type...)>::type
|
||
|
|
__call(const tuple<_Args...>& __args,
|
||
|
|
_Index_tuple<_Indexes...>) volatile
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const volatile
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
typename result_of<
|
||
|
|
const volatile _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(const volatile _Bound_args,
|
||
|
|
tuple<_Args...>)
|
||
|
|
>::type...)>::type
|
||
|
|
__call(const tuple<_Args...>& __args,
|
||
|
|
_Index_tuple<_Indexes...>) const volatile
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
explicit _Bind(_Functor __f, _Bound_args... __bound_args)
|
||
|
|
: _M_f(__f), _M_bound_args(__bound_args...) { }
|
||
|
|
|
||
|
|
// Call unqualified
|
||
|
|
template<typename... _Args>
|
||
|
|
typename result_of<
|
||
|
|
_Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(_Bound_args, tuple<_Args...>)>::type...)
|
||
|
|
>::type
|
||
|
|
operator()(_Args&... __args)
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const
|
||
|
|
template<typename... _Args>
|
||
|
|
typename result_of<
|
||
|
|
const _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(const _Bound_args, tuple<_Args...>)>::type...)
|
||
|
|
>::type
|
||
|
|
operator()(_Args&... __args) const
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Call as volatile
|
||
|
|
template<typename... _Args>
|
||
|
|
typename result_of<
|
||
|
|
volatile _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(volatile _Bound_args, tuple<_Args...>)>::type...)
|
||
|
|
>::type
|
||
|
|
operator()(_Args&... __args) volatile
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
// Call as const volatile
|
||
|
|
template<typename... _Args>
|
||
|
|
typename result_of<
|
||
|
|
const volatile _Functor(typename result_of<_Mu<_Bound_args>
|
||
|
|
(const volatile _Bound_args,
|
||
|
|
tuple<_Args...>)>::type...)
|
||
|
|
>::type
|
||
|
|
operator()(_Args&... __args) const volatile
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Type of the function object returned from bind<R>().
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Result, typename _Signature>
|
||
|
|
struct _Bind_result;
|
||
|
|
|
||
|
|
template<typename _Result, typename _Functor, typename... _Bound_args>
|
||
|
|
class _Bind_result<_Result, _Functor(_Bound_args...)>
|
||
|
|
{
|
||
|
|
typedef _Bind_result __self_type;
|
||
|
|
typedef typename _Build_index_tuple<sizeof...(_Bound_args)>::__type
|
||
|
|
_Bound_indexes;
|
||
|
|
|
||
|
|
_Functor _M_f;
|
||
|
|
tuple<_Bound_args...> _M_bound_args;
|
||
|
|
|
||
|
|
// Call unqualified
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
_Result
|
||
|
|
__call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>)
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
_Result
|
||
|
|
__call(const tuple<_Args...>& __args, _Index_tuple<_Indexes...>) const
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as volatile
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
_Result
|
||
|
|
__call(const tuple<_Args...>& __args,
|
||
|
|
_Index_tuple<_Indexes...>) volatile
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const volatile
|
||
|
|
template<typename... _Args, int... _Indexes>
|
||
|
|
_Result
|
||
|
|
__call(const tuple<_Args...>& __args,
|
||
|
|
_Index_tuple<_Indexes...>) const volatile
|
||
|
|
{
|
||
|
|
return _M_f(_Mu<_Bound_args>()
|
||
|
|
(_GLIBCXX_TR1 get<_Indexes>(_M_bound_args), __args)...);
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Result result_type;
|
||
|
|
|
||
|
|
explicit
|
||
|
|
_Bind_result(_Functor __f, _Bound_args... __bound_args)
|
||
|
|
: _M_f(__f), _M_bound_args(__bound_args...) { }
|
||
|
|
|
||
|
|
// Call unqualified
|
||
|
|
template<typename... _Args>
|
||
|
|
result_type
|
||
|
|
operator()(_Args&... __args)
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const
|
||
|
|
template<typename... _Args>
|
||
|
|
result_type
|
||
|
|
operator()(_Args&... __args) const
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as volatile
|
||
|
|
template<typename... _Args>
|
||
|
|
result_type
|
||
|
|
operator()(_Args&... __args) volatile
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Call as const volatile
|
||
|
|
template<typename... _Args>
|
||
|
|
result_type
|
||
|
|
operator()(_Args&... __args) const volatile
|
||
|
|
{
|
||
|
|
return this->__call(_GLIBCXX_TR1 tie(__args...), _Bound_indexes());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Class template _Bind is always a bind expression.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
struct is_bind_expression<_Bind<_Signature> >
|
||
|
|
{ static const bool value = true; };
|
||
|
|
|
||
|
|
template<typename _Signature>
|
||
|
|
const bool is_bind_expression<_Bind<_Signature> >::value;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Class template _Bind_result is always a bind expression.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Result, typename _Signature>
|
||
|
|
struct is_bind_expression<_Bind_result<_Result, _Signature> >
|
||
|
|
{ static const bool value = true; };
|
||
|
|
|
||
|
|
template<typename _Result, typename _Signature>
|
||
|
|
const bool is_bind_expression<_Bind_result<_Result, _Signature> >::value;
|
||
|
|
|
||
|
|
template<typename _Functor, typename... _ArgTypes>
|
||
|
|
inline
|
||
|
|
_Bind<typename _Maybe_wrap_member_pointer<_Functor>::type(_ArgTypes...)>
|
||
|
|
bind(_Functor __f, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type;
|
||
|
|
typedef typename __maybe_type::type __functor_type;
|
||
|
|
typedef _Bind<__functor_type(_ArgTypes...)> __result_type;
|
||
|
|
return __result_type(__maybe_type::__do_wrap(__f), __args...);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Result, typename _Functor, typename... _ArgTypes>
|
||
|
|
inline
|
||
|
|
_Bind_result<_Result,
|
||
|
|
typename _Maybe_wrap_member_pointer<_Functor>::type
|
||
|
|
(_ArgTypes...)>
|
||
|
|
bind(_Functor __f, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
typedef _Maybe_wrap_member_pointer<_Functor> __maybe_type;
|
||
|
|
typedef typename __maybe_type::type __functor_type;
|
||
|
|
typedef _Bind_result<_Result, __functor_type(_ArgTypes...)>
|
||
|
|
__result_type;
|
||
|
|
return __result_type(__maybe_type::__do_wrap(__f), __args...);
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Exception class thrown when class template function's
|
||
|
|
* operator() is called with an empty target.
|
||
|
|
*
|
||
|
|
*/
|
||
|
|
class bad_function_call : public std::exception { };
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* The integral constant expression 0 can be converted into a
|
||
|
|
* pointer to this type. It is used by the function template to
|
||
|
|
* accept NULL pointers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
struct _M_clear_type;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Trait identifying "location-invariant" types, meaning that the
|
||
|
|
* address of the object (or any of its members) will not escape.
|
||
|
|
* Also implies a trivial copy constructor and assignment operator.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
template<typename _Tp>
|
||
|
|
struct __is_location_invariant
|
||
|
|
: integral_constant<bool,
|
||
|
|
(is_pointer<_Tp>::value
|
||
|
|
|| is_member_pointer<_Tp>::value)>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
class _Undefined_class;
|
||
|
|
|
||
|
|
union _Nocopy_types
|
||
|
|
{
|
||
|
|
void* _M_object;
|
||
|
|
const void* _M_const_object;
|
||
|
|
void (*_M_function_pointer)();
|
||
|
|
void (_Undefined_class::*_M_member_pointer)();
|
||
|
|
};
|
||
|
|
|
||
|
|
union _Any_data
|
||
|
|
{
|
||
|
|
void* _M_access() { return &_M_pod_data[0]; }
|
||
|
|
const void* _M_access() const { return &_M_pod_data[0]; }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
_Tp&
|
||
|
|
_M_access()
|
||
|
|
{ return *static_cast<_Tp*>(_M_access()); }
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
const _Tp&
|
||
|
|
_M_access() const
|
||
|
|
{ return *static_cast<const _Tp*>(_M_access()); }
|
||
|
|
|
||
|
|
_Nocopy_types _M_unused;
|
||
|
|
char _M_pod_data[sizeof(_Nocopy_types)];
|
||
|
|
};
|
||
|
|
|
||
|
|
enum _Manager_operation
|
||
|
|
{
|
||
|
|
__get_type_info,
|
||
|
|
__get_functor_ptr,
|
||
|
|
__clone_functor,
|
||
|
|
__destroy_functor
|
||
|
|
};
|
||
|
|
|
||
|
|
/* Simple type wrapper that helps avoid annoying const problems
|
||
|
|
when casting between void pointers and pointers-to-pointers. */
|
||
|
|
template<typename _Tp>
|
||
|
|
struct _Simple_type_wrapper
|
||
|
|
{
|
||
|
|
_Simple_type_wrapper(_Tp __value) : __value(__value) { }
|
||
|
|
|
||
|
|
_Tp __value;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
struct __is_location_invariant<_Simple_type_wrapper<_Tp> >
|
||
|
|
: __is_location_invariant<_Tp>
|
||
|
|
{
|
||
|
|
};
|
||
|
|
|
||
|
|
// Converts a reference to a function object into a callable
|
||
|
|
// function object.
|
||
|
|
template<typename _Functor>
|
||
|
|
inline _Functor&
|
||
|
|
__callable_functor(_Functor& __f)
|
||
|
|
{ return __f; }
|
||
|
|
|
||
|
|
template<typename _Member, typename _Class>
|
||
|
|
inline _Mem_fn<_Member _Class::*>
|
||
|
|
__callable_functor(_Member _Class::* &__p)
|
||
|
|
{ return mem_fn(__p); }
|
||
|
|
|
||
|
|
template<typename _Member, typename _Class>
|
||
|
|
inline _Mem_fn<_Member _Class::*>
|
||
|
|
__callable_functor(_Member _Class::* const &__p)
|
||
|
|
{ return mem_fn(__p); }
|
||
|
|
|
||
|
|
template<typename _Signature>
|
||
|
|
class function;
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* Base class of all polymorphic function object wrappers.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
class _Function_base
|
||
|
|
{
|
||
|
|
public:
|
||
|
|
static const std::size_t _M_max_size = sizeof(_Nocopy_types);
|
||
|
|
static const std::size_t _M_max_align = __alignof__(_Nocopy_types);
|
||
|
|
|
||
|
|
template<typename _Functor>
|
||
|
|
class _Base_manager
|
||
|
|
{
|
||
|
|
protected:
|
||
|
|
static const bool __stored_locally =
|
||
|
|
(__is_location_invariant<_Functor>::value
|
||
|
|
&& sizeof(_Functor) <= _M_max_size
|
||
|
|
&& __alignof__(_Functor) <= _M_max_align
|
||
|
|
&& (_M_max_align % __alignof__(_Functor) == 0));
|
||
|
|
|
||
|
|
typedef integral_constant<bool, __stored_locally> _Local_storage;
|
||
|
|
|
||
|
|
// Retrieve a pointer to the function object
|
||
|
|
static _Functor*
|
||
|
|
_M_get_pointer(const _Any_data& __source)
|
||
|
|
{
|
||
|
|
const _Functor* __ptr =
|
||
|
|
__stored_locally? &__source._M_access<_Functor>()
|
||
|
|
/* have stored a pointer */ : __source._M_access<_Functor*>();
|
||
|
|
return const_cast<_Functor*>(__ptr);
|
||
|
|
}
|
||
|
|
|
||
|
|
// Clone a location-invariant function object that fits within
|
||
|
|
// an _Any_data structure.
|
||
|
|
static void
|
||
|
|
_M_clone(_Any_data& __dest, const _Any_data& __source, true_type)
|
||
|
|
{
|
||
|
|
new (__dest._M_access()) _Functor(__source._M_access<_Functor>());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Clone a function object that is not location-invariant or
|
||
|
|
// that cannot fit into an _Any_data structure.
|
||
|
|
static void
|
||
|
|
_M_clone(_Any_data& __dest, const _Any_data& __source, false_type)
|
||
|
|
{
|
||
|
|
__dest._M_access<_Functor*>() =
|
||
|
|
new _Functor(*__source._M_access<_Functor*>());
|
||
|
|
}
|
||
|
|
|
||
|
|
// Destroying a location-invariant object may still require
|
||
|
|
// destruction.
|
||
|
|
static void
|
||
|
|
_M_destroy(_Any_data& __victim, true_type)
|
||
|
|
{
|
||
|
|
__victim._M_access<_Functor>().~_Functor();
|
||
|
|
}
|
||
|
|
|
||
|
|
// Destroying an object located on the heap.
|
||
|
|
static void
|
||
|
|
_M_destroy(_Any_data& __victim, false_type)
|
||
|
|
{
|
||
|
|
delete __victim._M_access<_Functor*>();
|
||
|
|
}
|
||
|
|
|
||
|
|
public:
|
||
|
|
static bool
|
||
|
|
_M_manager(_Any_data& __dest, const _Any_data& __source,
|
||
|
|
_Manager_operation __op)
|
||
|
|
{
|
||
|
|
switch (__op)
|
||
|
|
{
|
||
|
|
case __get_type_info:
|
||
|
|
__dest._M_access<const type_info*>() = &typeid(_Functor);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case __get_functor_ptr:
|
||
|
|
__dest._M_access<_Functor*>() = _M_get_pointer(__source);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case __clone_functor:
|
||
|
|
_M_clone(__dest, __source, _Local_storage());
|
||
|
|
break;
|
||
|
|
|
||
|
|
case __destroy_functor:
|
||
|
|
_M_destroy(__dest, _Local_storage());
|
||
|
|
break;
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
_M_init_functor(_Any_data& __functor, const _Functor& __f)
|
||
|
|
{
|
||
|
|
_M_init_functor(__functor, __f, _Local_storage());
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Signature>
|
||
|
|
static bool
|
||
|
|
_M_not_empty_function(const function<_Signature>& __f)
|
||
|
|
{
|
||
|
|
return __f;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
static bool
|
||
|
|
_M_not_empty_function(const _Tp*& __fp)
|
||
|
|
{
|
||
|
|
return __fp;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Class, typename _Tp>
|
||
|
|
static bool
|
||
|
|
_M_not_empty_function(_Tp _Class::* const& __mp)
|
||
|
|
{
|
||
|
|
return __mp;
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Tp>
|
||
|
|
static bool
|
||
|
|
_M_not_empty_function(const _Tp&)
|
||
|
|
{
|
||
|
|
return true;
|
||
|
|
}
|
||
|
|
|
||
|
|
private:
|
||
|
|
static void
|
||
|
|
_M_init_functor(_Any_data& __functor, const _Functor& __f, true_type)
|
||
|
|
{
|
||
|
|
new (__functor._M_access()) _Functor(__f);
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
_M_init_functor(_Any_data& __functor, const _Functor& __f, false_type)
|
||
|
|
{
|
||
|
|
__functor._M_access<_Functor*>() = new _Functor(__f);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Functor>
|
||
|
|
class _Ref_manager : public _Base_manager<_Functor*>
|
||
|
|
{
|
||
|
|
typedef _Function_base::_Base_manager<_Functor*> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static bool
|
||
|
|
_M_manager(_Any_data& __dest, const _Any_data& __source,
|
||
|
|
_Manager_operation __op)
|
||
|
|
{
|
||
|
|
switch (__op)
|
||
|
|
{
|
||
|
|
case __get_type_info:
|
||
|
|
__dest._M_access<const type_info*>() = &typeid(_Functor);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case __get_functor_ptr:
|
||
|
|
__dest._M_access<_Functor*>() = *_Base::_M_get_pointer(__source);
|
||
|
|
return is_const<_Functor>::value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
_Base::_M_manager(__dest, __source, __op);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
_M_init_functor(_Any_data& __functor, reference_wrapper<_Functor> __f)
|
||
|
|
{
|
||
|
|
// TBD: Use address_of function instead
|
||
|
|
_Base::_M_init_functor(__functor, &__f.get());
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
_Function_base() : _M_manager(0) { }
|
||
|
|
|
||
|
|
~_Function_base()
|
||
|
|
{
|
||
|
|
if (_M_manager)
|
||
|
|
_M_manager(_M_functor, _M_functor, __destroy_functor);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
bool _M_empty() const { return !_M_manager; }
|
||
|
|
|
||
|
|
typedef bool (*_Manager_type)(_Any_data&, const _Any_data&,
|
||
|
|
_Manager_operation);
|
||
|
|
|
||
|
|
_Any_data _M_functor;
|
||
|
|
_Manager_type _M_manager;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Signature, typename _Functor>
|
||
|
|
class _Function_handler;
|
||
|
|
|
||
|
|
template<typename _Res, typename _Functor, typename... _ArgTypes>
|
||
|
|
class _Function_handler<_Res(_ArgTypes...), _Functor>
|
||
|
|
: public _Function_base::_Base_manager<_Functor>
|
||
|
|
{
|
||
|
|
typedef _Function_base::_Base_manager<_Functor> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static _Res
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
return (*_Base::_M_get_pointer(__functor))(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Functor, typename... _ArgTypes>
|
||
|
|
class _Function_handler<void(_ArgTypes...), _Functor>
|
||
|
|
: public _Function_base::_Base_manager<_Functor>
|
||
|
|
{
|
||
|
|
typedef _Function_base::_Base_manager<_Functor> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static void
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
(*_Base::_M_get_pointer(__functor))(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Res, typename _Functor, typename... _ArgTypes>
|
||
|
|
class _Function_handler<_Res(_ArgTypes...), reference_wrapper<_Functor> >
|
||
|
|
: public _Function_base::_Ref_manager<_Functor>
|
||
|
|
{
|
||
|
|
typedef _Function_base::_Ref_manager<_Functor> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static _Res
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
return
|
||
|
|
__callable_functor(**_Base::_M_get_pointer(__functor))(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Functor, typename... _ArgTypes>
|
||
|
|
class _Function_handler<void(_ArgTypes...), reference_wrapper<_Functor> >
|
||
|
|
: public _Function_base::_Ref_manager<_Functor>
|
||
|
|
{
|
||
|
|
typedef _Function_base::_Ref_manager<_Functor> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static void
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
__callable_functor(**_Base::_M_get_pointer(__functor))(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Class, typename _Member, typename _Res,
|
||
|
|
typename... _ArgTypes>
|
||
|
|
class _Function_handler<_Res(_ArgTypes...), _Member _Class::*>
|
||
|
|
: public _Function_handler<void(_ArgTypes...), _Member _Class::*>
|
||
|
|
{
|
||
|
|
typedef _Function_handler<void(_ArgTypes...), _Member _Class::*>
|
||
|
|
_Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static _Res
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
return _GLIBCXX_TR1
|
||
|
|
mem_fn(_Base::_M_get_pointer(__functor)->__value)(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Class, typename _Member, typename... _ArgTypes>
|
||
|
|
class _Function_handler<void(_ArgTypes...), _Member _Class::*>
|
||
|
|
: public _Function_base::_Base_manager<
|
||
|
|
_Simple_type_wrapper< _Member _Class::* > >
|
||
|
|
{
|
||
|
|
typedef _Member _Class::* _Functor;
|
||
|
|
typedef _Simple_type_wrapper<_Functor> _Wrapper;
|
||
|
|
typedef _Function_base::_Base_manager<_Wrapper> _Base;
|
||
|
|
|
||
|
|
public:
|
||
|
|
static bool
|
||
|
|
_M_manager(_Any_data& __dest, const _Any_data& __source,
|
||
|
|
_Manager_operation __op)
|
||
|
|
{
|
||
|
|
switch (__op)
|
||
|
|
{
|
||
|
|
case __get_type_info:
|
||
|
|
__dest._M_access<const type_info*>() = &typeid(_Functor);
|
||
|
|
break;
|
||
|
|
|
||
|
|
case __get_functor_ptr:
|
||
|
|
__dest._M_access<_Functor*>() =
|
||
|
|
&_Base::_M_get_pointer(__source)->__value;
|
||
|
|
break;
|
||
|
|
|
||
|
|
default:
|
||
|
|
_Base::_M_manager(__dest, __source, __op);
|
||
|
|
}
|
||
|
|
return false;
|
||
|
|
}
|
||
|
|
|
||
|
|
static void
|
||
|
|
_M_invoke(const _Any_data& __functor, _ArgTypes... __args)
|
||
|
|
{
|
||
|
|
_GLIBCXX_TR1
|
||
|
|
mem_fn(_Base::_M_get_pointer(__functor)->__value)(__args...);
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Res, typename... _ArgTypes>
|
||
|
|
class function<_Res(_ArgTypes...)>
|
||
|
|
: public _Maybe_unary_or_binary_function<_Res, _ArgTypes...>,
|
||
|
|
private _Function_base
|
||
|
|
{
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* This class is used to implement the safe_bool idiom.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
struct _Hidden_type
|
||
|
|
{
|
||
|
|
_Hidden_type* _M_bool;
|
||
|
|
};
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @if maint
|
||
|
|
* This typedef is used to implement the safe_bool idiom.
|
||
|
|
* @endif
|
||
|
|
*/
|
||
|
|
typedef _Hidden_type* _Hidden_type::* _Safe_bool;
|
||
|
|
|
||
|
|
typedef _Res _Signature_type(_ArgTypes...);
|
||
|
|
|
||
|
|
struct _Useless {};
|
||
|
|
|
||
|
|
public:
|
||
|
|
typedef _Res result_type;
|
||
|
|
|
||
|
|
// [3.7.2.1] construct/copy/destroy
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Default construct creates an empty function call wrapper.
|
||
|
|
* @post @c !(bool)*this
|
||
|
|
*/
|
||
|
|
function() : _Function_base() { }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Default construct creates an empty function call wrapper.
|
||
|
|
* @post @c !(bool)*this
|
||
|
|
*/
|
||
|
|
function(_M_clear_type*) : _Function_base() { }
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief %Function copy constructor.
|
||
|
|
* @param x A %function object with identical call signature.
|
||
|
|
* @pre @c (bool)*this == (bool)x
|
||
|
|
*
|
||
|
|
* The newly-created %function contains a copy of the target of @a
|
||
|
|
* x (if it has one).
|
||
|
|
*/
|
||
|
|
function(const function& __x);
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Builds a %function that targets a copy of the incoming
|
||
|
|
* function object.
|
||
|
|
* @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.
|
||
|
|
*
|
||
|
|
* The newly-created %function object 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, the newly-created 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>
|
||
|
|
function(_Functor __f,
|
||
|
|
typename __gnu_cxx::__enable_if<
|
||
|
|
!is_integral<_Functor>::value, _Useless>::__type
|
||
|
|
= _Useless());
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief %Function assignment operator.
|
||
|
|
* @param x A %function with identical call signature.
|
||
|
|
* @post @c (bool)*this == (bool)x
|
||
|
|
* @returns @c *this
|
||
|
|
*
|
||
|
|
* The target of @a x is copied to @c *this. If @a x has no
|
||
|
|
* target, then @c *this will be empty.
|
||
|
|
*
|
||
|
|
* If @a x targets a function pointer or a reference to a function
|
||
|
|
* object, then this operation will not throw an exception.
|
||
|
|
*/
|
||
|
|
function&
|
||
|
|
operator=(const function& __x)
|
||
|
|
{
|
||
|
|
function(__x).swap(*this);
|
||
|
|
return *this;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief %Function assignment to zero.
|
||
|
|
* @post @c !(bool)*this
|
||
|
|
* @returns @c *this
|
||
|
|
*
|
||
|
|
* The target of @a *this is deallocated, leaving it empty.
|
||
|
|
*/
|
||
|
|
function&
|
||
|
|
operator=(_M_clear_type*)
|
||
|
|
{
|
||
|
|
if (_M_manager)
|
||
|
|
{
|
||
|
|
_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 __gnu_cxx::__enable_if<!is_integral<_Functor>::value,
|
||
|
|
function&>::__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()(_ArgTypes... __args) 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&, _ArgTypes...);
|
||
|
|
_Invoker_type _M_invoker;
|
||
|
|
};
|
||
|
|
|
||
|
|
template<typename _Res, typename... _ArgTypes>
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
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, typename... _ArgTypes>
|
||
|
|
template<typename _Functor>
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
function(_Functor __f,
|
||
|
|
typename __gnu_cxx::__enable_if<
|
||
|
|
!is_integral<_Functor>::value, _Useless>::__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, typename... _ArgTypes>
|
||
|
|
_Res
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
operator()(_ArgTypes... __args) const
|
||
|
|
{
|
||
|
|
if (_M_empty())
|
||
|
|
{
|
||
|
|
#if __EXCEPTIONS
|
||
|
|
throw bad_function_call();
|
||
|
|
#else
|
||
|
|
__builtin_abort();
|
||
|
|
#endif
|
||
|
|
}
|
||
|
|
return _M_invoker(_M_functor, __args...);
|
||
|
|
}
|
||
|
|
|
||
|
|
template<typename _Res, typename... _ArgTypes>
|
||
|
|
const type_info&
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
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, typename... _ArgTypes>
|
||
|
|
template<typename _Functor>
|
||
|
|
_Functor*
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
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, typename... _ArgTypes>
|
||
|
|
template<typename _Functor>
|
||
|
|
const _Functor*
|
||
|
|
function<_Res(_ArgTypes...)>::
|
||
|
|
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;
|
||
|
|
}
|
||
|
|
|
||
|
|
// [3.7.2.7] null pointer comparisons
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Compares a polymorphic function object wrapper against 0
|
||
|
|
* (the NULL pointer).
|
||
|
|
* @returns @c true if the wrapper has no target, @c false otherwise
|
||
|
|
*
|
||
|
|
* This function will not throw an exception.
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
inline bool
|
||
|
|
operator==(const function<_Signature>& __f, _M_clear_type*)
|
||
|
|
{
|
||
|
|
return !__f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @overload
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
inline bool
|
||
|
|
operator==(_M_clear_type*, const function<_Signature>& __f)
|
||
|
|
{
|
||
|
|
return !__f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Compares a polymorphic function object wrapper against 0
|
||
|
|
* (the NULL pointer).
|
||
|
|
* @returns @c false if the wrapper has no target, @c true otherwise
|
||
|
|
*
|
||
|
|
* This function will not throw an exception.
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
inline bool
|
||
|
|
operator!=(const function<_Signature>& __f, _M_clear_type*)
|
||
|
|
{
|
||
|
|
return __f;
|
||
|
|
}
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @overload
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
inline bool
|
||
|
|
operator!=(_M_clear_type*, const function<_Signature>& __f)
|
||
|
|
{
|
||
|
|
return __f;
|
||
|
|
}
|
||
|
|
|
||
|
|
// [3.7.2.8] specialized algorithms
|
||
|
|
|
||
|
|
/**
|
||
|
|
* @brief Swap the targets of two polymorphic function object wrappers.
|
||
|
|
*
|
||
|
|
* This function will not throw an exception.
|
||
|
|
*/
|
||
|
|
template<typename _Signature>
|
||
|
|
inline void
|
||
|
|
swap(function<_Signature>& __x, function<_Signature>& __y)
|
||
|
|
{
|
||
|
|
__x.swap(__y);
|
||
|
|
}
|
||
|
|
|
||
|
|
_GLIBCXX_END_NAMESPACE_TR1
|
||
|
|
}
|