0,0 → 1,2377 |
// <functional> -*- C++ -*- |
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// Copyright (C) 2001-2015 Free Software Foundation, Inc. |
// |
// This file is part of the GNU ISO C++ Library. This library is free |
// software; you can redistribute it and/or modify it under the |
// terms of the GNU General Public License as published by the |
// Free Software Foundation; either version 3, or (at your option) |
// any later version. |
|
// This library is distributed in the hope that it will be useful, |
// but WITHOUT ANY WARRANTY; without even the implied warranty of |
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
// GNU General Public License for more details. |
|
// Under Section 7 of GPL version 3, you are granted additional |
// permissions described in the GCC Runtime Library Exception, version |
// 3.1, as published by the Free Software Foundation. |
|
// You should have received a copy of the GNU General Public License and |
// a copy of the GCC Runtime Library Exception along with this program; |
// see the files COPYING3 and COPYING.RUNTIME respectively. If not, see |
// <http://www.gnu.org/licenses/>. |
|
/* |
* Copyright (c) 1997 |
* Silicon Graphics Computer Systems, Inc. |
* |
* Permission to use, copy, modify, distribute and sell this software |
* and its documentation for any purpose is hereby granted without fee, |
* provided that the above copyright notice appear in all copies and |
* that both that copyright notice and this permission notice appear |
* in supporting documentation. Silicon Graphics makes no |
* representations about the suitability of this software for any |
* purpose. It is provided "as is" without express or implied warranty. |
* |
*/ |
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/** @file include/functional |
* This is a Standard C++ Library header. |
*/ |
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#ifndef _GLIBCXX_FUNCTIONAL |
#define _GLIBCXX_FUNCTIONAL 1 |
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#pragma GCC system_header |
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#include <bits/c++config.h> |
#include <bits/stl_function.h> |
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#if __cplusplus >= 201103L |
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#include <typeinfo> |
#include <new> |
#include <tuple> |
#include <type_traits> |
#include <bits/functexcept.h> |
#include <bits/functional_hash.h> |
|
namespace std _GLIBCXX_VISIBILITY(default) |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
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template<typename _MemberPointer> |
class _Mem_fn; |
template<typename _Tp, typename _Class> |
_Mem_fn<_Tp _Class::*> |
mem_fn(_Tp _Class::*) noexcept; |
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/// If we have found a result_type, extract it. |
template<typename _Functor, typename = __void_t<>> |
struct _Maybe_get_result_type |
{ }; |
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template<typename _Functor> |
struct _Maybe_get_result_type<_Functor, |
__void_t<typename _Functor::result_type>> |
{ typedef typename _Functor::result_type result_type; }; |
|
/** |
* Base class for any function object that has a weak result type, as |
* defined in 20.8.2 [func.require] of C++11. |
*/ |
template<typename _Functor> |
struct _Weak_result_type_impl |
: _Maybe_get_result_type<_Functor> |
{ }; |
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/// Retrieve the result type for a function type. |
template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes...)> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes......)> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes...) const> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes......) const> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes...) volatile> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes......) volatile> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes...) const volatile> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(_ArgTypes......) const volatile> |
{ typedef _Res result_type; }; |
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/// Retrieve the result type for a function reference. |
template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(&)(_ArgTypes...)> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(&)(_ArgTypes......)> |
{ typedef _Res result_type; }; |
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/// Retrieve the result type for a function pointer. |
template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(*)(_ArgTypes...)> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res(*)(_ArgTypes......)> |
{ typedef _Res result_type; }; |
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/// Retrieve result type for a member function pointer. |
template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...)> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes......)> |
{ typedef _Res result_type; }; |
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/// Retrieve result type for a const member function pointer. |
template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) const> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes......) const> |
{ typedef _Res result_type; }; |
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/// Retrieve result type for a volatile member function pointer. |
template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) volatile> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes......) volatile> |
{ typedef _Res result_type; }; |
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/// Retrieve result type for a const volatile member function pointer. |
template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes...) |
const volatile> |
{ typedef _Res result_type; }; |
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template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Weak_result_type_impl<_Res (_Class::*)(_ArgTypes......) |
const volatile> |
{ typedef _Res result_type; }; |
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/** |
* Strip top-level cv-qualifiers from the function object and let |
* _Weak_result_type_impl perform the real work. |
*/ |
template<typename _Functor> |
struct _Weak_result_type |
: _Weak_result_type_impl<typename remove_cv<_Functor>::type> |
{ }; |
|
/** |
* Invoke a function object, which may be either a member pointer or a |
* function object. The first parameter will tell which. |
*/ |
template<typename _Functor, typename... _Args> |
inline |
typename enable_if< |
(!is_member_pointer<_Functor>::value |
&& !is_function<_Functor>::value |
&& !is_function<typename remove_pointer<_Functor>::type>::value), |
typename result_of<_Functor&(_Args&&...)>::type |
>::type |
__invoke(_Functor& __f, _Args&&... __args) |
{ |
return __f(std::forward<_Args>(__args)...); |
} |
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template<typename _Functor, typename... _Args> |
inline |
typename enable_if< |
(is_member_pointer<_Functor>::value |
&& !is_function<_Functor>::value |
&& !is_function<typename remove_pointer<_Functor>::type>::value), |
typename result_of<_Functor(_Args&&...)>::type |
>::type |
__invoke(_Functor& __f, _Args&&... __args) |
{ |
return std::mem_fn(__f)(std::forward<_Args>(__args)...); |
} |
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// To pick up function references (that will become function pointers) |
template<typename _Functor, typename... _Args> |
inline |
typename enable_if< |
(is_pointer<_Functor>::value |
&& is_function<typename remove_pointer<_Functor>::type>::value), |
typename result_of<_Functor(_Args&&...)>::type |
>::type |
__invoke(_Functor __f, _Args&&... __args) |
{ |
return __f(std::forward<_Args>(__args)...); |
} |
|
/** |
* Knowing which of unary_function and binary_function _Tp derives |
* from, derives from the same and ensures that reference_wrapper |
* will have a weak result type. See cases below. |
*/ |
template<bool _Unary, bool _Binary, typename _Tp> |
struct _Reference_wrapper_base_impl; |
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// None of the nested argument types. |
template<typename _Tp> |
struct _Reference_wrapper_base_impl<false, false, _Tp> |
: _Weak_result_type<_Tp> |
{ }; |
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// Nested argument_type only. |
template<typename _Tp> |
struct _Reference_wrapper_base_impl<true, false, _Tp> |
: _Weak_result_type<_Tp> |
{ |
typedef typename _Tp::argument_type argument_type; |
}; |
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// Nested first_argument_type and second_argument_type only. |
template<typename _Tp> |
struct _Reference_wrapper_base_impl<false, true, _Tp> |
: _Weak_result_type<_Tp> |
{ |
typedef typename _Tp::first_argument_type first_argument_type; |
typedef typename _Tp::second_argument_type second_argument_type; |
}; |
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// All the nested argument types. |
template<typename _Tp> |
struct _Reference_wrapper_base_impl<true, true, _Tp> |
: _Weak_result_type<_Tp> |
{ |
typedef typename _Tp::argument_type argument_type; |
typedef typename _Tp::first_argument_type first_argument_type; |
typedef typename _Tp::second_argument_type second_argument_type; |
}; |
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_GLIBCXX_HAS_NESTED_TYPE(argument_type) |
_GLIBCXX_HAS_NESTED_TYPE(first_argument_type) |
_GLIBCXX_HAS_NESTED_TYPE(second_argument_type) |
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/** |
* 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. |
*/ |
template<typename _Tp> |
struct _Reference_wrapper_base |
: _Reference_wrapper_base_impl< |
__has_argument_type<_Tp>::value, |
__has_first_argument_type<_Tp>::value |
&& __has_second_argument_type<_Tp>::value, |
_Tp> |
{ }; |
|
// - a function type (unary) |
template<typename _Res, typename _T1> |
struct _Reference_wrapper_base<_Res(_T1)> |
: unary_function<_T1, _Res> |
{ }; |
|
template<typename _Res, typename _T1> |
struct _Reference_wrapper_base<_Res(_T1) const> |
: unary_function<_T1, _Res> |
{ }; |
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template<typename _Res, typename _T1> |
struct _Reference_wrapper_base<_Res(_T1) volatile> |
: unary_function<_T1, _Res> |
{ }; |
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template<typename _Res, typename _T1> |
struct _Reference_wrapper_base<_Res(_T1) const volatile> |
: 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> |
{ }; |
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template<typename _Res, typename _T1, typename _T2> |
struct _Reference_wrapper_base<_Res(_T1, _T2) const> |
: binary_function<_T1, _T2, _Res> |
{ }; |
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template<typename _Res, typename _T1, typename _T2> |
struct _Reference_wrapper_base<_Res(_T1, _T2) volatile> |
: binary_function<_T1, _T2, _Res> |
{ }; |
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template<typename _Res, typename _T1, typename _T2> |
struct _Reference_wrapper_base<_Res(_T1, _T2) const volatile> |
: binary_function<_T1, _T2, _Res> |
{ }; |
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// - a function pointer type (unary) |
template<typename _Res, typename _T1> |
struct _Reference_wrapper_base<_Res(*)(_T1)> |
: unary_function<_T1, _Res> |
{ }; |
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// - 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> |
{ }; |
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// - 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> |
{ }; |
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// - 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> |
{ }; |
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// - 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> |
{ }; |
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// - 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> |
{ }; |
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// - 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> |
{ }; |
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/** |
* @brief Primary class template for reference_wrapper. |
* @ingroup functors |
* @{ |
*/ |
template<typename _Tp> |
class reference_wrapper |
: public _Reference_wrapper_base<typename remove_cv<_Tp>::type> |
{ |
_Tp* _M_data; |
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public: |
typedef _Tp type; |
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reference_wrapper(_Tp& __indata) noexcept |
: _M_data(std::__addressof(__indata)) |
{ } |
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reference_wrapper(_Tp&&) = delete; |
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reference_wrapper(const reference_wrapper&) = default; |
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reference_wrapper& |
operator=(const reference_wrapper&) = default; |
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operator _Tp&() const noexcept |
{ return this->get(); } |
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_Tp& |
get() const noexcept |
{ return *_M_data; } |
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template<typename... _Args> |
typename result_of<_Tp&(_Args&&...)>::type |
operator()(_Args&&... __args) const |
{ |
return __invoke(get(), std::forward<_Args>(__args)...); |
} |
}; |
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/// Denotes a reference should be taken to a variable. |
template<typename _Tp> |
inline reference_wrapper<_Tp> |
ref(_Tp& __t) noexcept |
{ return reference_wrapper<_Tp>(__t); } |
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/// Denotes a const reference should be taken to a variable. |
template<typename _Tp> |
inline reference_wrapper<const _Tp> |
cref(const _Tp& __t) noexcept |
{ return reference_wrapper<const _Tp>(__t); } |
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template<typename _Tp> |
void ref(const _Tp&&) = delete; |
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template<typename _Tp> |
void cref(const _Tp&&) = delete; |
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/// Partial specialization. |
template<typename _Tp> |
inline reference_wrapper<_Tp> |
ref(reference_wrapper<_Tp> __t) noexcept |
{ return ref(__t.get()); } |
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/// Partial specialization. |
template<typename _Tp> |
inline reference_wrapper<const _Tp> |
cref(reference_wrapper<_Tp> __t) noexcept |
{ return cref(__t.get()); } |
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// @} group functors |
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template<typename... _Types> |
struct _Pack : integral_constant<size_t, sizeof...(_Types)> |
{ }; |
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template<typename _From, typename _To, bool = _From::value == _To::value> |
struct _AllConvertible : false_type |
{ }; |
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template<typename... _From, typename... _To> |
struct _AllConvertible<_Pack<_From...>, _Pack<_To...>, true> |
: __and_<is_convertible<_From, _To>...> |
{ }; |
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template<typename _Tp1, typename _Tp2> |
using _NotSame = __not_<is_same<typename std::decay<_Tp1>::type, |
typename std::decay<_Tp2>::type>>; |
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/** |
* 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. |
*/ |
template<typename _Res, typename... _ArgTypes> |
struct _Maybe_unary_or_binary_function { }; |
|
/// Derives from @c unary_function, as appropriate. |
template<typename _Res, typename _T1> |
struct _Maybe_unary_or_binary_function<_Res, _T1> |
: std::unary_function<_T1, _Res> { }; |
|
/// Derives from @c binary_function, as appropriate. |
template<typename _Res, typename _T1, typename _T2> |
struct _Maybe_unary_or_binary_function<_Res, _T1, _T2> |
: std::binary_function<_T1, _T2, _Res> { }; |
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template<typename _Signature> |
struct _Mem_fn_traits; |
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template<typename _Res, typename _Class, typename... _ArgTypes> |
struct _Mem_fn_traits_base |
{ |
using __result_type = _Res; |
using __class_type = _Class; |
using __arg_types = _Pack<_ArgTypes...>; |
using __maybe_type |
= _Maybe_unary_or_binary_function<_Res, _Class*, _ArgTypes...>; |
using __arity = integral_constant<size_t, sizeof...(_ArgTypes)>; |
}; |
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#define _GLIBCXX_MEM_FN_TRAITS2(_CV, _REF, _LVAL, _RVAL) \ |
template<typename _Res, typename _Class, typename... _ArgTypes> \ |
struct _Mem_fn_traits<_Res (_Class::*)(_ArgTypes...) _CV _REF> \ |
: _Mem_fn_traits_base<_Res, _CV _Class, _ArgTypes...> \ |
{ \ |
using __pmf_type = _Res (_Class::*)(_ArgTypes...) _CV _REF; \ |
using __lvalue = _LVAL; \ |
using __rvalue = _RVAL; \ |
using __vararg = false_type; \ |
}; \ |
template<typename _Res, typename _Class, typename... _ArgTypes> \ |
struct _Mem_fn_traits<_Res (_Class::*)(_ArgTypes... ...) _CV _REF> \ |
: _Mem_fn_traits_base<_Res, _CV _Class, _ArgTypes...> \ |
{ \ |
using __pmf_type = _Res (_Class::*)(_ArgTypes... ...) _CV _REF; \ |
using __lvalue = _LVAL; \ |
using __rvalue = _RVAL; \ |
using __vararg = true_type; \ |
}; |
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#define _GLIBCXX_MEM_FN_TRAITS(_REF, _LVAL, _RVAL) \ |
_GLIBCXX_MEM_FN_TRAITS2( , _REF, _LVAL, _RVAL) \ |
_GLIBCXX_MEM_FN_TRAITS2(const , _REF, _LVAL, _RVAL) \ |
_GLIBCXX_MEM_FN_TRAITS2(volatile , _REF, _LVAL, _RVAL) \ |
_GLIBCXX_MEM_FN_TRAITS2(const volatile, _REF, _LVAL, _RVAL) |
|
_GLIBCXX_MEM_FN_TRAITS( , true_type, true_type) |
_GLIBCXX_MEM_FN_TRAITS(&, true_type, false_type) |
_GLIBCXX_MEM_FN_TRAITS(&&, false_type, true_type) |
|
#undef _GLIBCXX_MEM_FN_TRAITS |
#undef _GLIBCXX_MEM_FN_TRAITS2 |
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template<typename _MemFunPtr, |
bool __is_mem_fn = is_member_function_pointer<_MemFunPtr>::value> |
class _Mem_fn_base |
: public _Mem_fn_traits<_MemFunPtr>::__maybe_type |
{ |
using _Traits = _Mem_fn_traits<_MemFunPtr>; |
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using _Class = typename _Traits::__class_type; |
using _ArgTypes = typename _Traits::__arg_types; |
using _Pmf = typename _Traits::__pmf_type; |
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using _Arity = typename _Traits::__arity; |
using _Varargs = typename _Traits::__vararg; |
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template<typename _Func, typename... _BoundArgs> |
friend struct _Bind_check_arity; |
|
// for varargs functions we just check the number of arguments, |
// otherwise we also check they are convertible. |
template<typename _Args> |
using _CheckArgs = typename conditional<_Varargs::value, |
__bool_constant<(_Args::value >= _ArgTypes::value)>, |
_AllConvertible<_Args, _ArgTypes> |
>::type; |
|
public: |
using result_type = typename _Traits::__result_type; |
|
explicit _Mem_fn_base(_Pmf __pmf) : _M_pmf(__pmf) { } |
|
// Handle objects |
template<typename... _Args, typename _Req |
= _Require<typename _Traits::__lvalue, |
_CheckArgs<_Pack<_Args...>>>> |
result_type |
operator()(_Class& __object, _Args&&... __args) const |
{ return (__object.*_M_pmf)(std::forward<_Args>(__args)...); } |
|
template<typename... _Args, typename _Req |
= _Require<typename _Traits::__rvalue, |
_CheckArgs<_Pack<_Args...>>>> |
result_type |
operator()(_Class&& __object, _Args&&... __args) const |
{ |
return (std::move(__object).*_M_pmf)(std::forward<_Args>(__args)...); |
} |
|
// Handle pointers |
template<typename... _Args, typename _Req |
= _Require<typename _Traits::__lvalue, |
_CheckArgs<_Pack<_Args...>>>> |
result_type |
operator()(_Class* __object, _Args&&... __args) const |
{ return (__object->*_M_pmf)(std::forward<_Args>(__args)...); } |
|
// Handle smart pointers, references and pointers to derived |
template<typename _Tp, typename... _Args, typename _Req |
= _Require<_NotSame<_Class, _Tp>, _NotSame<_Class*, _Tp>, |
_CheckArgs<_Pack<_Args...>>>> |
result_type |
operator()(_Tp&& __object, _Args&&... __args) const |
{ |
return _M_call(std::forward<_Tp>(__object), &__object, |
std::forward<_Args>(__args)...); |
} |
|
// Handle reference wrappers |
template<typename _Tp, typename... _Args, typename _Req |
= _Require<is_base_of<_Class, _Tp>, typename _Traits::__lvalue, |
_CheckArgs<_Pack<_Args...>>>> |
result_type |
operator()(reference_wrapper<_Tp> __ref, _Args&&... __args) const |
{ return operator()(__ref.get(), std::forward<_Args>(__args)...); } |
|
private: |
template<typename _Tp, typename... _Args> |
result_type |
_M_call(_Tp&& __object, const volatile _Class *, |
_Args&&... __args) const |
{ |
return (std::forward<_Tp>(__object).*_M_pmf) |
(std::forward<_Args>(__args)...); |
} |
|
template<typename _Tp, typename... _Args> |
result_type |
_M_call(_Tp&& __ptr, const volatile void *, _Args&&... __args) const |
{ return ((*__ptr).*_M_pmf)(std::forward<_Args>(__args)...); } |
|
_Pmf _M_pmf; |
}; |
|
// Partial specialization for member object pointers. |
template<typename _Res, typename _Class> |
class _Mem_fn_base<_Res _Class::*, false> |
{ |
using __pm_type = _Res _Class::*; |
|
// This bit of genius is due to Peter Dimov, improved slightly by |
// Douglas Gregor. |
// Made less elegant to support perfect forwarding and noexcept. |
template<typename _Tp> |
auto |
_M_call(_Tp&& __object, const _Class *) const noexcept |
-> decltype(std::forward<_Tp>(__object).*std::declval<__pm_type&>()) |
{ return std::forward<_Tp>(__object).*_M_pm; } |
|
template<typename _Tp, typename _Up> |
auto |
_M_call(_Tp&& __object, _Up * const *) const noexcept |
-> decltype((*std::forward<_Tp>(__object)).*std::declval<__pm_type&>()) |
{ return (*std::forward<_Tp>(__object)).*_M_pm; } |
|
template<typename _Tp> |
auto |
_M_call(_Tp&& __ptr, const volatile void*) const |
noexcept(noexcept((*__ptr).*std::declval<__pm_type&>())) |
-> decltype((*__ptr).*std::declval<__pm_type&>()) |
{ return (*__ptr).*_M_pm; } |
|
using _Arity = integral_constant<size_t, 0>; |
using _Varargs = false_type; |
|
template<typename _Func, typename... _BoundArgs> |
friend struct _Bind_check_arity; |
|
public: |
explicit |
_Mem_fn_base(_Res _Class::*__pm) noexcept : _M_pm(__pm) { } |
|
// Handle objects |
_Res& |
operator()(_Class& __object) const noexcept |
{ return __object.*_M_pm; } |
|
const _Res& |
operator()(const _Class& __object) const noexcept |
{ return __object.*_M_pm; } |
|
_Res&& |
operator()(_Class&& __object) const noexcept |
{ return std::forward<_Class>(__object).*_M_pm; } |
|
const _Res&& |
operator()(const _Class&& __object) const noexcept |
{ return std::forward<const _Class>(__object).*_M_pm; } |
|
// Handle pointers |
_Res& |
operator()(_Class* __object) const noexcept |
{ return __object->*_M_pm; } |
|
const _Res& |
operator()(const _Class* __object) const noexcept |
{ return __object->*_M_pm; } |
|
// Handle smart pointers and derived |
template<typename _Tp, typename _Req = _Require<_NotSame<_Class*, _Tp>>> |
auto |
operator()(_Tp&& __unknown) const |
noexcept(noexcept(std::declval<_Mem_fn_base*>()->_M_call |
(std::forward<_Tp>(__unknown), &__unknown))) |
-> decltype(this->_M_call(std::forward<_Tp>(__unknown), &__unknown)) |
{ return _M_call(std::forward<_Tp>(__unknown), &__unknown); } |
|
template<typename _Tp, typename _Req = _Require<is_base_of<_Class, _Tp>>> |
auto |
operator()(reference_wrapper<_Tp> __ref) const |
noexcept(noexcept(std::declval<_Mem_fn_base&>()(__ref.get()))) |
-> decltype((*this)(__ref.get())) |
{ return (*this)(__ref.get()); } |
|
private: |
_Res _Class::*_M_pm; |
}; |
|
template<typename _Res, typename _Class> |
struct _Mem_fn<_Res _Class::*> |
: _Mem_fn_base<_Res _Class::*> |
{ |
using _Mem_fn_base<_Res _Class::*>::_Mem_fn_base; |
}; |
|
// _GLIBCXX_RESOLVE_LIB_DEFECTS |
// 2048. Unnecessary mem_fn overloads |
/** |
* @brief Returns a function object that forwards to the member |
* pointer @a pm. |
* @ingroup functors |
*/ |
template<typename _Tp, typename _Class> |
inline _Mem_fn<_Tp _Class::*> |
mem_fn(_Tp _Class::* __pm) noexcept |
{ |
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] |
* @ingroup binders |
*/ |
template<typename _Tp> |
struct is_bind_expression |
: public false_type { }; |
|
/** |
* @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] |
* @ingroup binders |
*/ |
template<typename _Tp> |
struct is_placeholder |
: public integral_constant<int, 0> |
{ }; |
|
/** @brief The type of placeholder objects defined by libstdc++. |
* @ingroup binders |
*/ |
template<int _Num> struct _Placeholder { }; |
|
_GLIBCXX_END_NAMESPACE_VERSION |
|
/** @namespace std::placeholders |
* @brief ISO C++11 entities sub-namespace for functional. |
* @ingroup binders |
*/ |
namespace placeholders |
{ |
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
/* Define a large number of placeholders. There is no way to |
* simplify this with variadic templates, because we're introducing |
* unique names for each. |
*/ |
extern const _Placeholder<1> _1; |
extern const _Placeholder<2> _2; |
extern const _Placeholder<3> _3; |
extern const _Placeholder<4> _4; |
extern const _Placeholder<5> _5; |
extern const _Placeholder<6> _6; |
extern const _Placeholder<7> _7; |
extern const _Placeholder<8> _8; |
extern const _Placeholder<9> _9; |
extern const _Placeholder<10> _10; |
extern const _Placeholder<11> _11; |
extern const _Placeholder<12> _12; |
extern const _Placeholder<13> _13; |
extern const _Placeholder<14> _14; |
extern const _Placeholder<15> _15; |
extern const _Placeholder<16> _16; |
extern const _Placeholder<17> _17; |
extern const _Placeholder<18> _18; |
extern const _Placeholder<19> _19; |
extern const _Placeholder<20> _20; |
extern const _Placeholder<21> _21; |
extern const _Placeholder<22> _22; |
extern const _Placeholder<23> _23; |
extern const _Placeholder<24> _24; |
extern const _Placeholder<25> _25; |
extern const _Placeholder<26> _26; |
extern const _Placeholder<27> _27; |
extern const _Placeholder<28> _28; |
extern const _Placeholder<29> _29; |
_GLIBCXX_END_NAMESPACE_VERSION |
} |
|
_GLIBCXX_BEGIN_NAMESPACE_VERSION |
|
/** |
* Partial specialization of is_placeholder that provides the placeholder |
* number for the placeholder objects defined by libstdc++. |
* @ingroup binders |
*/ |
template<int _Num> |
struct is_placeholder<_Placeholder<_Num> > |
: public integral_constant<int, _Num> |
{ }; |
|
template<int _Num> |
struct is_placeholder<const _Placeholder<_Num> > |
: public integral_constant<int, _Num> |
{ }; |
|
/** |
* Used by _Safe_tuple_element to indicate that there is no tuple |
* element at this position. |
*/ |
struct _No_tuple_element; |
|
/** |
* Implementation helper for _Safe_tuple_element. This primary |
* template handles the case where it is safe to use @c |
* tuple_element. |
*/ |
template<std::size_t __i, typename _Tuple, bool _IsSafe> |
struct _Safe_tuple_element_impl |
: tuple_element<__i, _Tuple> { }; |
|
/** |
* 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. |
*/ |
template<std::size_t __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<std::size_t __i, typename _Tuple> |
struct _Safe_tuple_element |
: _Safe_tuple_element_impl<__i, _Tuple, |
(__i < tuple_size<_Tuple>::value)> |
{ }; |
|
/** |
* 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, it isn't 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. |
*/ |
template<typename _Arg, |
bool _IsBindExp = is_bind_expression<_Arg>::value, |
bool _IsPlaceholder = (is_placeholder<_Arg>::value > 0)> |
class _Mu; |
|
/** |
* If the argument is reference_wrapper<_Tp>, returns the |
* underlying reference. [TR1 3.6.3/5 bullet 1] |
*/ |
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, _Tuple&) const volatile |
{ return __arg.get(); } |
}; |
|
/** |
* 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] |
*/ |
template<typename _Arg> |
class _Mu<_Arg, true, false> |
{ |
public: |
template<typename _CVArg, typename... _Args> |
auto |
operator()(_CVArg& __arg, |
tuple<_Args...>& __tuple) const volatile |
-> decltype(__arg(declval<_Args>()...)) |
{ |
// 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, std::size_t... _Indexes> |
auto |
__call(_CVArg& __arg, tuple<_Args...>& __tuple, |
const _Index_tuple<_Indexes...>&) const volatile |
-> decltype(__arg(declval<_Args>()...)) |
{ |
return __arg(std::forward<_Args>(std::get<_Indexes>(__tuple))...); |
} |
}; |
|
/** |
* 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] |
*/ |
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_rvalue_reference<__base_type>::type type; |
}; |
|
template<typename _Tuple> |
typename result<_Mu(_Arg, _Tuple)>::type |
operator()(const volatile _Arg&, _Tuple& __tuple) const volatile |
{ |
return std::forward<typename result<_Mu(_Arg, _Tuple)>::type>( |
::std::get<(is_placeholder<_Arg>::value - 1)>(__tuple)); |
} |
}; |
|
/** |
* 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] |
*/ |
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_lvalue_reference<_CVArg>::type type; |
}; |
|
// Pick up the cv-qualifiers of the argument |
template<typename _CVArg, typename _Tuple> |
_CVArg&& |
operator()(_CVArg&& __arg, _Tuple&) const volatile |
{ return std::forward<_CVArg>(__arg); } |
}; |
|
/** |
* Maps member pointers into instances of _Mem_fn but leaves all |
* other function objects untouched. Used by std::bind(). The |
* primary template handles the non-member-pointer case. |
*/ |
template<typename _Tp> |
struct _Maybe_wrap_member_pointer |
{ |
typedef _Tp type; |
|
static const _Tp& |
__do_wrap(const _Tp& __x) |
{ return __x; } |
|
static _Tp&& |
__do_wrap(_Tp&& __x) |
{ return static_cast<_Tp&&>(__x); } |
}; |
|
/** |
* Maps member pointers into instances of _Mem_fn but leaves all |
* other function objects untouched. Used by std::bind(). This |
* partial specialization handles the member pointer case. |
*/ |
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); } |
}; |
|
// Specialization needed to prevent "forming reference to void" errors when |
// bind<void>() is called, because argument deduction instantiates |
// _Maybe_wrap_member_pointer<void> outside the immediate context where |
// SFINAE applies. |
template<> |
struct _Maybe_wrap_member_pointer<void> |
{ |
typedef void type; |
}; |
|
// std::get<I> for volatile-qualified tuples |
template<std::size_t _Ind, typename... _Tp> |
inline auto |
__volget(volatile tuple<_Tp...>& __tuple) |
-> __tuple_element_t<_Ind, tuple<_Tp...>> volatile& |
{ return std::get<_Ind>(const_cast<tuple<_Tp...>&>(__tuple)); } |
|
// std::get<I> for const-volatile-qualified tuples |
template<std::size_t _Ind, typename... _Tp> |
inline auto |
__volget(const volatile tuple<_Tp...>& __tuple) |
-> __tuple_element_t<_Ind, tuple<_Tp...>> const volatile& |
{ return std::get<_Ind>(const_cast<const tuple<_Tp...>&>(__tuple)); } |
|
/// Type of the function object returned from bind(). |
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 _Result, typename... _Args, std::size_t... _Indexes> |
_Result |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) |
{ |
return _M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const |
template<typename _Result, typename... _Args, std::size_t... _Indexes> |
_Result |
__call_c(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>) const |
{ |
return _M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as volatile |
template<typename _Result, typename... _Args, std::size_t... _Indexes> |
_Result |
__call_v(tuple<_Args...>&& __args, |
_Index_tuple<_Indexes...>) volatile |
{ |
return _M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const volatile |
template<typename _Result, typename... _Args, std::size_t... _Indexes> |
_Result |
__call_c_v(tuple<_Args...>&& __args, |
_Index_tuple<_Indexes...>) const volatile |
{ |
return _M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
public: |
template<typename... _Args> |
explicit _Bind(const _Functor& __f, _Args&&... __args) |
: _M_f(__f), _M_bound_args(std::forward<_Args>(__args)...) |
{ } |
|
template<typename... _Args> |
explicit _Bind(_Functor&& __f, _Args&&... __args) |
: _M_f(std::move(__f)), _M_bound_args(std::forward<_Args>(__args)...) |
{ } |
|
_Bind(const _Bind&) = default; |
|
_Bind(_Bind&& __b) |
: _M_f(std::move(__b._M_f)), _M_bound_args(std::move(__b._M_bound_args)) |
{ } |
|
// Call unqualified |
template<typename... _Args, typename _Result |
= decltype( std::declval<_Functor&>()( |
_Mu<_Bound_args>()( std::declval<_Bound_args&>(), |
std::declval<tuple<_Args...>&>() )... ) )> |
_Result |
operator()(_Args&&... __args) |
{ |
return this->__call<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as const |
template<typename... _Args, typename _Result |
= decltype( std::declval<typename enable_if<(sizeof...(_Args) >= 0), |
typename add_const<_Functor>::type&>::type>()( |
_Mu<_Bound_args>()( std::declval<const _Bound_args&>(), |
std::declval<tuple<_Args...>&>() )... ) )> |
_Result |
operator()(_Args&&... __args) const |
{ |
return this->__call_c<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as volatile |
template<typename... _Args, typename _Result |
= decltype( std::declval<typename enable_if<(sizeof...(_Args) >= 0), |
typename add_volatile<_Functor>::type&>::type>()( |
_Mu<_Bound_args>()( std::declval<volatile _Bound_args&>(), |
std::declval<tuple<_Args...>&>() )... ) )> |
_Result |
operator()(_Args&&... __args) volatile |
{ |
return this->__call_v<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as const volatile |
template<typename... _Args, typename _Result |
= decltype( std::declval<typename enable_if<(sizeof...(_Args) >= 0), |
typename add_cv<_Functor>::type&>::type>()( |
_Mu<_Bound_args>()( std::declval<const volatile _Bound_args&>(), |
std::declval<tuple<_Args...>&>() )... ) )> |
_Result |
operator()(_Args&&... __args) const volatile |
{ |
return this->__call_c_v<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
}; |
|
/// Type of the function object returned from bind<R>(). |
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; |
|
// sfinae types |
template<typename _Res> |
struct __enable_if_void : enable_if<is_void<_Res>::value, int> { }; |
template<typename _Res> |
struct __disable_if_void : enable_if<!is_void<_Res>::value, int> { }; |
|
// Call unqualified |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
_Result |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __disable_if_void<_Res>::type = 0) |
{ |
return _M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call unqualified, return void |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
void |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __enable_if_void<_Res>::type = 0) |
{ |
_M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
_Result |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __disable_if_void<_Res>::type = 0) const |
{ |
return _M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const, return void |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
void |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __enable_if_void<_Res>::type = 0) const |
{ |
_M_f(_Mu<_Bound_args>() |
(std::get<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as volatile |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
_Result |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __disable_if_void<_Res>::type = 0) volatile |
{ |
return _M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as volatile, return void |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
void |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __enable_if_void<_Res>::type = 0) volatile |
{ |
_M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const volatile |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
_Result |
__call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>, |
typename __disable_if_void<_Res>::type = 0) const volatile |
{ |
return _M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
// Call as const volatile, return void |
template<typename _Res, typename... _Args, std::size_t... _Indexes> |
void |
__call(tuple<_Args...>&& __args, |
_Index_tuple<_Indexes...>, |
typename __enable_if_void<_Res>::type = 0) const volatile |
{ |
_M_f(_Mu<_Bound_args>() |
(__volget<_Indexes>(_M_bound_args), __args)...); |
} |
|
public: |
typedef _Result result_type; |
|
template<typename... _Args> |
explicit _Bind_result(const _Functor& __f, _Args&&... __args) |
: _M_f(__f), _M_bound_args(std::forward<_Args>(__args)...) |
{ } |
|
template<typename... _Args> |
explicit _Bind_result(_Functor&& __f, _Args&&... __args) |
: _M_f(std::move(__f)), _M_bound_args(std::forward<_Args>(__args)...) |
{ } |
|
_Bind_result(const _Bind_result&) = default; |
|
_Bind_result(_Bind_result&& __b) |
: _M_f(std::move(__b._M_f)), _M_bound_args(std::move(__b._M_bound_args)) |
{ } |
|
// Call unqualified |
template<typename... _Args> |
result_type |
operator()(_Args&&... __args) |
{ |
return this->__call<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as const |
template<typename... _Args> |
result_type |
operator()(_Args&&... __args) const |
{ |
return this->__call<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as volatile |
template<typename... _Args> |
result_type |
operator()(_Args&&... __args) volatile |
{ |
return this->__call<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
|
// Call as const volatile |
template<typename... _Args> |
result_type |
operator()(_Args&&... __args) const volatile |
{ |
return this->__call<_Result>( |
std::forward_as_tuple(std::forward<_Args>(__args)...), |
_Bound_indexes()); |
} |
}; |
|
/** |
* @brief Class template _Bind is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Signature> |
struct is_bind_expression<_Bind<_Signature> > |
: public true_type { }; |
|
/** |
* @brief Class template _Bind is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Signature> |
struct is_bind_expression<const _Bind<_Signature> > |
: public true_type { }; |
|
/** |
* @brief Class template _Bind is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Signature> |
struct is_bind_expression<volatile _Bind<_Signature> > |
: public true_type { }; |
|
/** |
* @brief Class template _Bind is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Signature> |
struct is_bind_expression<const volatile _Bind<_Signature>> |
: public true_type { }; |
|
/** |
* @brief Class template _Bind_result is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Result, typename _Signature> |
struct is_bind_expression<_Bind_result<_Result, _Signature>> |
: public true_type { }; |
|
/** |
* @brief Class template _Bind_result is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Result, typename _Signature> |
struct is_bind_expression<const _Bind_result<_Result, _Signature>> |
: public true_type { }; |
|
/** |
* @brief Class template _Bind_result is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Result, typename _Signature> |
struct is_bind_expression<volatile _Bind_result<_Result, _Signature>> |
: public true_type { }; |
|
/** |
* @brief Class template _Bind_result is always a bind expression. |
* @ingroup binders |
*/ |
template<typename _Result, typename _Signature> |
struct is_bind_expression<const volatile _Bind_result<_Result, _Signature>> |
: public true_type { }; |
|
template<typename _Func, typename... _BoundArgs> |
struct _Bind_check_arity { }; |
|
template<typename _Ret, typename... _Args, typename... _BoundArgs> |
struct _Bind_check_arity<_Ret (*)(_Args...), _BoundArgs...> |
{ |
static_assert(sizeof...(_BoundArgs) == sizeof...(_Args), |
"Wrong number of arguments for function"); |
}; |
|
template<typename _Ret, typename... _Args, typename... _BoundArgs> |
struct _Bind_check_arity<_Ret (*)(_Args......), _BoundArgs...> |
{ |
static_assert(sizeof...(_BoundArgs) >= sizeof...(_Args), |
"Wrong number of arguments for function"); |
}; |
|
template<typename _Tp, typename _Class, typename... _BoundArgs> |
struct _Bind_check_arity<_Tp _Class::*, _BoundArgs...> |
{ |
using _Arity = typename _Mem_fn<_Tp _Class::*>::_Arity; |
using _Varargs = typename _Mem_fn<_Tp _Class::*>::_Varargs; |
static_assert(_Varargs::value |
? sizeof...(_BoundArgs) >= _Arity::value + 1 |
: sizeof...(_BoundArgs) == _Arity::value + 1, |
"Wrong number of arguments for pointer-to-member"); |
}; |
|
// Trait type used to remove std::bind() from overload set via SFINAE |
// when first argument has integer type, so that std::bind() will |
// not be a better match than ::bind() from the BSD Sockets API. |
template<typename _Tp, typename _Tp2 = typename decay<_Tp>::type> |
using __is_socketlike = __or_<is_integral<_Tp2>, is_enum<_Tp2>>; |
|
template<bool _SocketLike, typename _Func, typename... _BoundArgs> |
struct _Bind_helper |
: _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...> |
{ |
typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type> |
__maybe_type; |
typedef typename __maybe_type::type __func_type; |
typedef _Bind<__func_type(typename decay<_BoundArgs>::type...)> type; |
}; |
|
// Partial specialization for is_socketlike == true, does not define |
// nested type so std::bind() will not participate in overload resolution |
// when the first argument might be a socket file descriptor. |
template<typename _Func, typename... _BoundArgs> |
struct _Bind_helper<true, _Func, _BoundArgs...> |
{ }; |
|
/** |
* @brief Function template for std::bind. |
* @ingroup binders |
*/ |
template<typename _Func, typename... _BoundArgs> |
inline typename |
_Bind_helper<__is_socketlike<_Func>::value, _Func, _BoundArgs...>::type |
bind(_Func&& __f, _BoundArgs&&... __args) |
{ |
typedef _Bind_helper<false, _Func, _BoundArgs...> __helper_type; |
typedef typename __helper_type::__maybe_type __maybe_type; |
typedef typename __helper_type::type __result_type; |
return __result_type(__maybe_type::__do_wrap(std::forward<_Func>(__f)), |
std::forward<_BoundArgs>(__args)...); |
} |
|
template<typename _Result, typename _Func, typename... _BoundArgs> |
struct _Bindres_helper |
: _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...> |
{ |
typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type> |
__maybe_type; |
typedef typename __maybe_type::type __functor_type; |
typedef _Bind_result<_Result, |
__functor_type(typename decay<_BoundArgs>::type...)> |
type; |
}; |
|
/** |
* @brief Function template for std::bind<R>. |
* @ingroup binders |
*/ |
template<typename _Result, typename _Func, typename... _BoundArgs> |
inline |
typename _Bindres_helper<_Result, _Func, _BoundArgs...>::type |
bind(_Func&& __f, _BoundArgs&&... __args) |
{ |
typedef _Bindres_helper<_Result, _Func, _BoundArgs...> __helper_type; |
typedef typename __helper_type::__maybe_type __maybe_type; |
typedef typename __helper_type::type __result_type; |
return __result_type(__maybe_type::__do_wrap(std::forward<_Func>(__f)), |
std::forward<_BoundArgs>(__args)...); |
} |
|
template<typename _Signature> |
struct _Bind_simple; |
|
template<typename _Callable, typename... _Args> |
struct _Bind_simple<_Callable(_Args...)> |
{ |
typedef typename result_of<_Callable(_Args...)>::type result_type; |
|
template<typename _Tp, typename... _Up> |
explicit |
_Bind_simple(_Tp&& __f, _Up&&... __args) |
: _M_bound(std::forward<_Tp>(__f), std::forward<_Up>(__args)...) |
{ } |
|
_Bind_simple(const _Bind_simple&) = default; |
_Bind_simple(_Bind_simple&&) = default; |
|
result_type |
operator()() |
{ |
typedef typename _Build_index_tuple<sizeof...(_Args)>::__type _Indices; |
return _M_invoke(_Indices()); |
} |
|
private: |
template<std::size_t... _Indices> |
typename result_of<_Callable(_Args...)>::type |
_M_invoke(_Index_tuple<_Indices...>) |
{ |
// std::bind always forwards bound arguments as lvalues, |
// but this type can call functions which only accept rvalues. |
return std::forward<_Callable>(std::get<0>(_M_bound))( |
std::forward<_Args>(std::get<_Indices+1>(_M_bound))...); |
} |
|
std::tuple<_Callable, _Args...> _M_bound; |
}; |
|
template<typename _Func, typename... _BoundArgs> |
struct _Bind_simple_helper |
: _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...> |
{ |
typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type> |
__maybe_type; |
typedef typename __maybe_type::type __func_type; |
typedef _Bind_simple<__func_type(typename decay<_BoundArgs>::type...)> |
__type; |
}; |
|
// Simplified version of std::bind for internal use, without support for |
// unbound arguments, placeholders or nested bind expressions. |
template<typename _Callable, typename... _Args> |
typename _Bind_simple_helper<_Callable, _Args...>::__type |
__bind_simple(_Callable&& __callable, _Args&&... __args) |
{ |
typedef _Bind_simple_helper<_Callable, _Args...> __helper_type; |
typedef typename __helper_type::__maybe_type __maybe_type; |
typedef typename __helper_type::__type __result_type; |
return __result_type( |
__maybe_type::__do_wrap( std::forward<_Callable>(__callable)), |
std::forward<_Args>(__args)...); |
} |
|
/** |
* @brief Exception class thrown when class template function's |
* operator() is called with an empty target. |
* @ingroup exceptions |
*/ |
class bad_function_call : public std::exception |
{ |
public: |
virtual ~bad_function_call() noexcept; |
|
const char* what() const noexcept; |
}; |
|
/** |
* Trait identifying "location-invariant" types, meaning that the |
* address of the object (or any of its members) will not escape. |
* Trivially copyable types are location-invariant and users can |
* specialize this trait for other types. |
*/ |
template<typename _Tp> |
struct __is_location_invariant |
: is_trivially_copyable<_Tp>::type |
{ }; |
|
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 std::mem_fn(__p); } |
|
template<typename _Member, typename _Class> |
inline _Mem_fn<_Member _Class::*> |
__callable_functor(_Member _Class::* const &__p) |
{ return std::mem_fn(__p); } |
|
template<typename _Member, typename _Class> |
inline _Mem_fn<_Member _Class::*> |
__callable_functor(_Member _Class::* volatile &__p) |
{ return std::mem_fn(__p); } |
|
template<typename _Member, typename _Class> |
inline _Mem_fn<_Member _Class::*> |
__callable_functor(_Member _Class::* const volatile &__p) |
{ return std::mem_fn(__p); } |
|
template<typename _Signature> |
class function; |
|
/// Base class of all polymorphic function object wrappers. |
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? std::__addressof(__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) |
{ |
#if __cpp_rtti |
case __get_type_info: |
__dest._M_access<const type_info*>() = &typeid(_Functor); |
break; |
#endif |
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, _Functor&& __f) |
{ _M_init_functor(__functor, std::move(__f), _Local_storage()); } |
|
template<typename _Signature> |
static bool |
_M_not_empty_function(const function<_Signature>& __f) |
{ return static_cast<bool>(__f); } |
|
template<typename _Tp> |
static bool |
_M_not_empty_function(_Tp* const& __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, _Functor&& __f, true_type) |
{ new (__functor._M_access()) _Functor(std::move(__f)); } |
|
static void |
_M_init_functor(_Any_data& __functor, _Functor&& __f, false_type) |
{ __functor._M_access<_Functor*>() = new _Functor(std::move(__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) |
{ |
#if __cpp_rtti |
case __get_type_info: |
__dest._M_access<const type_info*>() = &typeid(_Functor); |
break; |
#endif |
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) |
{ |
_Base::_M_init_functor(__functor, std::__addressof(__f.get())); |
} |
}; |
|
_Function_base() : _M_manager(nullptr) { } |
|
~_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))( |
std::forward<_ArgTypes>(__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))( |
std::forward<_ArgTypes>(__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 std::__callable_functor(**_Base::_M_get_pointer(__functor))( |
std::forward<_ArgTypes>(__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) |
{ |
std::__callable_functor(**_Base::_M_get_pointer(__functor))( |
std::forward<_ArgTypes>(__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 std::mem_fn(_Base::_M_get_pointer(__functor)->__value)( |
std::forward<_ArgTypes>(__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) |
{ |
#if __cpp_rtti |
case __get_type_info: |
__dest._M_access<const type_info*>() = &typeid(_Functor); |
break; |
#endif |
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) |
{ |
std::mem_fn(_Base::_M_get_pointer(__functor)->__value)( |
std::forward<_ArgTypes>(__args)...); |
} |
}; |
|
template<typename _From, typename _To> |
using __check_func_return_type |
= __or_<is_void<_To>, is_convertible<_From, _To>>; |
|
/** |
* @brief Primary class template for std::function. |
* @ingroup functors |
* |
* Polymorphic function wrapper. |
*/ |
template<typename _Res, typename... _ArgTypes> |
class function<_Res(_ArgTypes...)> |
: public _Maybe_unary_or_binary_function<_Res, _ArgTypes...>, |
private _Function_base |
{ |
typedef _Res _Signature_type(_ArgTypes...); |
|
template<typename _Func, |
typename _Res2 = typename result_of<_Func(_ArgTypes...)>::type> |
struct _Callable : __check_func_return_type<_Res2, _Res> { }; |
|
// Used so the return type convertibility checks aren't done when |
// performing overload resolution for copy construction/assignment. |
template<typename _Tp> |
struct _Callable<function, _Tp> : false_type { }; |
|
template<typename _Cond, typename _Tp> |
using _Requires = typename enable_if<_Cond::value, _Tp>::type; |
|
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() noexcept |
: _Function_base() { } |
|
/** |
* @brief Creates an empty function call wrapper. |
* @post @c !(bool)*this |
*/ |
function(nullptr_t) noexcept |
: _Function_base() { } |
|
/** |
* @brief %Function copy constructor. |
* @param __x A %function object with identical call signature. |
* @post @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 %Function move constructor. |
* @param __x A %function object rvalue with identical call signature. |
* |
* The newly-created %function contains the target of @a __x |
* (if it has one). |
*/ |
function(function&& __x) : _Function_base() |
{ |
__x.swap(*this); |
} |
|
// TODO: needs allocator_arg_t |
|
/** |
* @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, |
typename = _Requires<__not_<is_same<_Functor, function>>, void>, |
typename = _Requires<_Callable<_Functor>, void>> |
function(_Functor); |
|
/** |
* @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 move-assignment operator. |
* @param __x A %function rvalue with identical call signature. |
* @returns @c *this |
* |
* The target of @a __x is moved 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=(function&& __x) |
{ |
function(std::move(__x)).swap(*this); |
return *this; |
} |
|
/** |
* @brief %Function assignment to zero. |
* @post @c !(bool)*this |
* @returns @c *this |
* |
* The target of @c *this is deallocated, leaving it empty. |
*/ |
function& |
operator=(nullptr_t) noexcept |
{ |
if (_M_manager) |
{ |
_M_manager(_M_functor, _M_functor, __destroy_functor); |
_M_manager = nullptr; |
_M_invoker = nullptr; |
} |
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> |
_Requires<_Callable<typename decay<_Functor>::type>, function&> |
operator=(_Functor&& __f) |
{ |
function(std::forward<_Functor>(__f)).swap(*this); |
return *this; |
} |
|
/// @overload |
template<typename _Functor> |
function& |
operator=(reference_wrapper<_Functor> __f) noexcept |
{ |
function(__f).swap(*this); |
return *this; |
} |
|
// [3.7.2.2] function modifiers |
|
/** |
* @brief Swap the targets of two %function objects. |
* @param __x 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) |
{ |
std::swap(_M_functor, __x._M_functor); |
std::swap(_M_manager, __x._M_manager); |
std::swap(_M_invoker, __x._M_invoker); |
} |
|
// TODO: needs allocator_arg_t |
/* |
template<typename _Functor, typename _Alloc> |
void |
assign(_Functor&& __f, const _Alloc& __a) |
{ |
function(allocator_arg, __a, |
std::forward<_Functor>(__f)).swap(*this); |
} |
*/ |
|
// [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. |
*/ |
explicit operator bool() const noexcept |
{ return !_M_empty(); } |
|
// [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; |
|
#if __cpp_rtti |
// [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 noexcept; |
|
/** |
* @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() noexcept; |
|
/// @overload |
template<typename _Functor> const _Functor* target() const noexcept; |
#endif |
|
private: |
using _Invoker_type = _Res (*)(const _Any_data&, _ArgTypes&&...); |
_Invoker_type _M_invoker; |
}; |
|
// Out-of-line member definitions. |
template<typename _Res, typename... _ArgTypes> |
function<_Res(_ArgTypes...)>:: |
function(const function& __x) |
: _Function_base() |
{ |
if (static_cast<bool>(__x)) |
{ |
__x._M_manager(_M_functor, __x._M_functor, __clone_functor); |
_M_invoker = __x._M_invoker; |
_M_manager = __x._M_manager; |
} |
} |
|
template<typename _Res, typename... _ArgTypes> |
template<typename _Functor, typename, typename> |
function<_Res(_ArgTypes...)>:: |
function(_Functor __f) |
: _Function_base() |
{ |
typedef _Function_handler<_Signature_type, _Functor> _My_handler; |
|
if (_My_handler::_M_not_empty_function(__f)) |
{ |
_My_handler::_M_init_functor(_M_functor, std::move(__f)); |
_M_invoker = &_My_handler::_M_invoke; |
_M_manager = &_My_handler::_M_manager; |
} |
} |
|
template<typename _Res, typename... _ArgTypes> |
_Res |
function<_Res(_ArgTypes...)>:: |
operator()(_ArgTypes... __args) const |
{ |
if (_M_empty()) |
__throw_bad_function_call(); |
return _M_invoker(_M_functor, std::forward<_ArgTypes>(__args)...); |
} |
|
#if __cpp_rtti |
template<typename _Res, typename... _ArgTypes> |
const type_info& |
function<_Res(_ArgTypes...)>:: |
target_type() const noexcept |
{ |
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() noexcept |
{ |
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 noexcept |
{ |
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; |
} |
#endif |
|
// [20.7.15.2.6] 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 _Res, typename... _Args> |
inline bool |
operator==(const function<_Res(_Args...)>& __f, nullptr_t) noexcept |
{ return !static_cast<bool>(__f); } |
|
/// @overload |
template<typename _Res, typename... _Args> |
inline bool |
operator==(nullptr_t, const function<_Res(_Args...)>& __f) noexcept |
{ return !static_cast<bool>(__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 _Res, typename... _Args> |
inline bool |
operator!=(const function<_Res(_Args...)>& __f, nullptr_t) noexcept |
{ return static_cast<bool>(__f); } |
|
/// @overload |
template<typename _Res, typename... _Args> |
inline bool |
operator!=(nullptr_t, const function<_Res(_Args...)>& __f) noexcept |
{ return static_cast<bool>(__f); } |
|
// [20.7.15.2.7] specialized algorithms |
|
/** |
* @brief Swap the targets of two polymorphic function object wrappers. |
* |
* This function will not throw an %exception. |
*/ |
template<typename _Res, typename... _Args> |
inline void |
swap(function<_Res(_Args...)>& __x, function<_Res(_Args...)>& __y) |
{ __x.swap(__y); } |
|
_GLIBCXX_END_NAMESPACE_VERSION |
} // namespace std |
|
#endif // C++11 |
|
#endif // _GLIBCXX_FUNCTIONAL |