43 #ifndef _GLIBCXX_FUNCTIONAL
44 #define _GLIBCXX_FUNCTIONAL 1
46 #pragma GCC system_header
51 #if __cplusplus >= 201103L
60 namespace std _GLIBCXX_VISIBILITY(default)
62 _GLIBCXX_BEGIN_NAMESPACE_VERSION
64 template<
typename _MemberPo
inter>
66 template<
typename _Tp,
typename _Class>
67 _Mem_fn<_Tp _Class::*>
68 mem_fn(_Tp _Class::*) noexcept;
71 template<typename _Functor, typename = __void_t<>>
75 template<
typename _Functor>
77 __void_t<typename _Functor::result_type>>
78 {
typedef typename _Functor::result_type result_type; };
84 template<
typename _Functor>
90 template<
typename _Res,
typename... _ArgTypes>
92 {
typedef _Res result_type; };
94 template<
typename _Res,
typename... _ArgTypes>
96 {
typedef _Res result_type; };
98 template<
typename _Res,
typename... _ArgTypes>
99 struct _Weak_result_type_impl<_Res(_ArgTypes...) const>
100 {
typedef _Res result_type; };
102 template<
typename _Res,
typename... _ArgTypes>
103 struct _Weak_result_type_impl<_Res(_ArgTypes......) const>
104 {
typedef _Res result_type; };
106 template<
typename _Res,
typename... _ArgTypes>
107 struct _Weak_result_type_impl<_Res(_ArgTypes...) volatile>
108 {
typedef _Res result_type; };
110 template<
typename _Res,
typename... _ArgTypes>
111 struct _Weak_result_type_impl<_Res(_ArgTypes......) volatile>
112 {
typedef _Res result_type; };
114 template<
typename _Res,
typename... _ArgTypes>
115 struct _Weak_result_type_impl<_Res(_ArgTypes...) const volatile>
116 {
typedef _Res result_type; };
118 template<
typename _Res,
typename... _ArgTypes>
119 struct _Weak_result_type_impl<_Res(_ArgTypes......) const volatile>
120 {
typedef _Res result_type; };
123 template<
typename _Res,
typename... _ArgTypes>
125 {
typedef _Res result_type; };
127 template<
typename _Res,
typename... _ArgTypes>
129 {
typedef _Res result_type; };
132 template<
typename _Res,
typename... _ArgTypes>
134 {
typedef _Res result_type; };
136 template<
typename _Res,
typename... _ArgTypes>
138 {
typedef _Res result_type; };
141 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
143 {
typedef _Res result_type; };
145 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
147 {
typedef _Res result_type; };
150 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
152 {
typedef _Res result_type; };
154 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
156 {
typedef _Res result_type; };
159 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
161 {
typedef _Res result_type; };
163 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
165 {
typedef _Res result_type; };
168 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
171 {
typedef _Res result_type; };
173 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
176 {
typedef _Res result_type; };
182 template<
typename _Functor>
187 template<typename _Tp, typename _Up = typename decay<_Tp>::type>
193 static constexpr _Tp&&
194 _S_fwd(_Tp& __t) noexcept {
return static_cast<_Tp&&
>(__t); }
197 template<
typename _Tp,
typename _Up>
198 struct _Unwrap<_Tp, reference_wrapper<_Up>>
204 _S_fwd(
const _Tp& __t) noexcept { __t.get(); }
209 template<
typename _Tp>
210 inline typename _Unwrap<_Tp>::type
211 __invfwd(
typename remove_reference<_Tp>::type& __t) noexcept
212 {
return _Unwrap<_Tp>::_S_fwd(__t); }
214 template<
typename _Res,
typename _Fn,
typename... _Args>
216 __invoke_impl(__invoke_other, _Fn&& __f, _Args&&... __args)
217 noexcept(noexcept(std::
forward<_Fn>(__f)(std::
forward<_Args>(__args)...)))
218 {
return std::forward<_Fn>(__f)(std::forward<_Args>(__args)...); }
220 template<
typename _Res,
typename _MemFun,
typename _Tp,
typename... _Args>
222 __invoke_impl(__invoke_memfun_ref, _MemFun&& __f, _Tp&& __t,
225 (__invfwd<_Tp>(__t).*__f)(std::
forward<_Args>(__args)...)))
226 {
return (__invfwd<_Tp>(__t).*__f)(std::forward<_Args>(__args)...); }
228 template<
typename _Res,
typename _MemFun,
typename _Tp,
typename... _Args>
230 __invoke_impl(__invoke_memfun_deref, _MemFun&& __f, _Tp&& __t,
233 ((*std::
forward<_Tp>(__t)).*__f)(std::
forward<_Args>(__args)...)))
235 return ((*std::forward<_Tp>(__t)).*__f)(std::forward<_Args>(__args)...);
238 template<
typename _Res,
typename _MemFun,
typename _Tp,
typename... _Args>
240 __invoke_impl(__invoke_memobj_ref, _MemFun&& __f, _Tp&& __t)
241 noexcept(noexcept(__invfwd<_Tp>(__t).*__f))
242 {
return __invfwd<_Tp>(__t).*__f; }
244 template<
typename _Res,
typename _MemFun,
typename _Tp,
typename... _Args>
246 __invoke_impl(__invoke_memobj_deref, _MemFun&& __f, _Tp&& __t,
248 noexcept(noexcept((*std::
forward<_Tp>(__t)).*__f))
249 {
return (*std::forward<_Tp>(__t)).*__f; }
252 template<
typename _Callable,
typename... _Args>
253 inline typename result_of<_Callable&&(_Args&&...)>::type
256 using __result_of = result_of<_Callable&&(_Args&&...)>;
257 using __type =
typename __result_of::type;
258 using __tag =
typename __result_of::__invoke_type;
259 return std::__invoke_impl<__type>(__tag{}, std::forward<_Callable>(__fn),
260 std::forward<_Args>(__args)...);
263 #if __cplusplus > 201402L
264 # define __cpp_lib_invoke 201411
267 template<
typename _Callable,
typename... _Args>
268 inline result_of_t<_Callable&&(_Args&&...)>
269 invoke(_Callable&& __fn, _Args&&... __args)
272 std::forward<_Args>(__args)...);
281 template<
bool _Unary,
bool _Binary,
typename _Tp>
285 template<
typename _Tp>
291 template<
typename _Tp>
295 typedef typename _Tp::argument_type argument_type;
299 template<
typename _Tp>
300 struct _Reference_wrapper_base_impl<false, true, _Tp>
301 : _Weak_result_type<_Tp>
303 typedef typename _Tp::first_argument_type first_argument_type;
304 typedef typename _Tp::second_argument_type second_argument_type;
308 template<
typename _Tp>
309 struct _Reference_wrapper_base_impl<true, true, _Tp>
310 : _Weak_result_type<_Tp>
312 typedef typename _Tp::argument_type argument_type;
313 typedef typename _Tp::first_argument_type first_argument_type;
314 typedef typename _Tp::second_argument_type second_argument_type;
317 _GLIBCXX_HAS_NESTED_TYPE(argument_type)
318 _GLIBCXX_HAS_NESTED_TYPE(first_argument_type)
319 _GLIBCXX_HAS_NESTED_TYPE(second_argument_type)
327 template<typename _Tp>
330 __has_argument_type<_Tp>::value,
331 __has_first_argument_type<_Tp>::value
332 && __has_second_argument_type<_Tp>::value,
337 template<
typename _Res,
typename _T1>
342 template<
typename _Res,
typename _T1>
343 struct _Reference_wrapper_base<_Res(_T1) const>
344 : unary_function<_T1, _Res>
347 template<
typename _Res,
typename _T1>
348 struct _Reference_wrapper_base<_Res(_T1) volatile>
349 : unary_function<_T1, _Res>
352 template<
typename _Res,
typename _T1>
353 struct _Reference_wrapper_base<_Res(_T1) const volatile>
354 : unary_function<_T1, _Res>
358 template<
typename _Res,
typename _T1,
typename _T2>
359 struct _Reference_wrapper_base<_Res(_T1, _T2)>
360 : binary_function<_T1, _T2, _Res>
363 template<
typename _Res,
typename _T1,
typename _T2>
364 struct _Reference_wrapper_base<_Res(_T1, _T2) const>
365 : binary_function<_T1, _T2, _Res>
368 template<
typename _Res,
typename _T1,
typename _T2>
369 struct _Reference_wrapper_base<_Res(_T1, _T2) volatile>
370 : binary_function<_T1, _T2, _Res>
373 template<
typename _Res,
typename _T1,
typename _T2>
374 struct _Reference_wrapper_base<_Res(_T1, _T2) const volatile>
375 : binary_function<_T1, _T2, _Res>
379 template<
typename _Res,
typename _T1>
380 struct _Reference_wrapper_base<_Res(*)(_T1)>
381 : unary_function<_T1, _Res>
385 template<
typename _Res,
typename _T1,
typename _T2>
386 struct _Reference_wrapper_base<_Res(*)(_T1, _T2)>
387 : binary_function<_T1, _T2, _Res>
391 template<
typename _Res,
typename _T1>
392 struct _Reference_wrapper_base<_Res (_T1::*)()>
393 : unary_function<_T1*, _Res>
397 template<
typename _Res,
typename _T1,
typename _T2>
398 struct _Reference_wrapper_base<_Res (_T1::*)(_T2)>
399 : binary_function<_T1*, _T2, _Res>
403 template<
typename _Res,
typename _T1>
404 struct _Reference_wrapper_base<_Res (_T1::*)() const>
405 : unary_function<const _T1*, _Res>
409 template<
typename _Res,
typename _T1,
typename _T2>
410 struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const>
411 : binary_function<const _T1*, _T2, _Res>
415 template<
typename _Res,
typename _T1>
416 struct _Reference_wrapper_base<_Res (_T1::*)() volatile>
417 : unary_function<volatile _T1*, _Res>
421 template<
typename _Res,
typename _T1,
typename _T2>
422 struct _Reference_wrapper_base<_Res (_T1::*)(_T2) volatile>
423 : binary_function<volatile _T1*, _T2, _Res>
427 template<
typename _Res,
typename _T1>
428 struct _Reference_wrapper_base<_Res (_T1::*)() const volatile>
429 : unary_function<const volatile _T1*, _Res>
433 template<
typename _Res,
typename _T1,
typename _T2>
434 struct _Reference_wrapper_base<_Res (_T1::*)(_T2) const volatile>
435 : binary_function<const volatile _T1*, _T2, _Res>
443 template<
typename _Tp>
463 operator _Tp&()
const noexcept
464 {
return this->
get(); }
470 template<
typename... _Args>
471 typename result_of<_Tp&(_Args&&...)>::type
472 operator()(_Args&&... __args)
const
480 template<
typename _Tp>
486 template<
typename _Tp>
487 inline reference_wrapper<const _Tp>
491 template<
typename _Tp>
492 void ref(
const _Tp&&) =
delete;
494 template<
typename _Tp>
495 void cref(
const _Tp&&) =
delete;
498 template<
typename _Tp>
499 inline reference_wrapper<_Tp>
501 {
return ref(__t.get()); }
504 template<
typename _Tp>
505 inline reference_wrapper<const _Tp>
507 {
return cref(__t.get()); }
511 template<
typename... _Types>
512 struct _Pack : integral_constant<size_t, sizeof...(_Types)>
515 template<
typename _From,
typename _To,
bool = _From::value == _To::value>
519 template<
typename... _From,
typename... _To>
520 struct _AllConvertible<_Pack<_From...>, _Pack<_To...>, true>
521 : __and_<is_convertible<_From, _To>...>
524 template<
typename _Tp1,
typename _Tp2>
525 using _NotSame = __not_<is_same<typename std::decay<_Tp1>::type,
526 typename std::decay<_Tp2>::type>>;
533 template<
typename _Res,
typename... _ArgTypes>
537 template<
typename _Res,
typename _T1>
542 template<
typename _Res,
typename _T1,
typename _T2>
546 template<
typename _Signature>
547 struct _Mem_fn_traits;
549 template<
typename _Res,
typename _Class,
typename... _ArgTypes>
550 struct _Mem_fn_traits_base
552 using __result_type = _Res;
558 #define _GLIBCXX_MEM_FN_TRAITS2(_CV, _REF, _LVAL, _RVAL) \
559 template<typename _Res, typename _Class, typename... _ArgTypes> \
560 struct _Mem_fn_traits<_Res (_Class::*)(_ArgTypes...) _CV _REF> \
561 : _Mem_fn_traits_base<_Res, _CV _Class, _ArgTypes...> \
563 using __vararg = false_type; \
565 template<typename _Res, typename _Class, typename... _ArgTypes> \
566 struct _Mem_fn_traits<_Res (_Class::*)(_ArgTypes... ...) _CV _REF> \
567 : _Mem_fn_traits_base<_Res, _CV _Class, _ArgTypes...> \
569 using __vararg = true_type; \
572 #define _GLIBCXX_MEM_FN_TRAITS(_REF, _LVAL, _RVAL) \
573 _GLIBCXX_MEM_FN_TRAITS2( , _REF, _LVAL, _RVAL) \
574 _GLIBCXX_MEM_FN_TRAITS2(const , _REF, _LVAL, _RVAL) \
575 _GLIBCXX_MEM_FN_TRAITS2(volatile , _REF, _LVAL, _RVAL) \
576 _GLIBCXX_MEM_FN_TRAITS2(const volatile, _REF, _LVAL, _RVAL)
580 _GLIBCXX_MEM_FN_TRAITS(&&,
false_type, true_type)
582 #undef _GLIBCXX_MEM_FN_TRAITS
583 #undef _GLIBCXX_MEM_FN_TRAITS2
585 template<
typename _MemFunPtr,
586 bool __is_mem_fn = is_member_function_pointer<_MemFunPtr>::value>
588 :
public _Mem_fn_traits<_MemFunPtr>::__maybe_type
590 using _Traits = _Mem_fn_traits<_MemFunPtr>;
592 using _Arity =
typename _Traits::__arity;
593 using _Varargs =
typename _Traits::__vararg;
595 template<
typename _Func,
typename... _BoundArgs>
596 friend struct _Bind_check_arity;
602 using result_type =
typename _Traits::__result_type;
605 _Mem_fn_base(_MemFunPtr __pmf) noexcept : _M_pmf(__pmf) { }
607 template<
typename... _Args>
609 operator()(_Args&&... __args) const
613 {
return std::__invoke(_M_pmf, std::forward<_Args>(__args)...); }
617 template<
typename _MemObjPtr>
618 class _Mem_fn_base<_MemObjPtr, false>
620 using _Arity = integral_constant<size_t, 0>;
623 template<
typename _Func,
typename... _BoundArgs>
624 friend struct _Bind_check_arity;
630 _Mem_fn_base(_MemObjPtr __pm) noexcept : _M_pm(__pm) { }
632 template<
typename _Tp>
634 operator()(_Tp&& __obj) const
640 template<
typename _Res,
typename _Class>
641 struct _Mem_fn<_Res _Class::*>
642 : _Mem_fn_base<_Res _Class::*>
644 using _Mem_fn_base<_Res _Class::*>::_Mem_fn_base;
654 template<
typename _Tp,
typename _Class>
655 inline _Mem_fn<_Tp _Class::*>
658 return _Mem_fn<_Tp _Class::*>(__pm);
669 template<
typename _Tp>
671 :
public false_type { };
680 template<
typename _Tp>
690 _GLIBCXX_END_NAMESPACE_VERSION
696 namespace placeholders
698 _GLIBCXX_BEGIN_NAMESPACE_VERSION
732 _GLIBCXX_END_NAMESPACE_VERSION
735 _GLIBCXX_BEGIN_NAMESPACE_VERSION
754 template<std::
size_t __i,
typename _Tuple>
755 using _Safe_tuple_element_t
756 =
typename enable_if<(__i < tuple_size<_Tuple>::value),
757 tuple_element<__i, _Tuple>>::type::type;
770 template<
typename _Arg,
771 bool _IsBindExp = is_bind_expression<_Arg>::value,
772 bool _IsPlaceholder = (is_placeholder<_Arg>::value > 0)>
780 template<
typename _Tp>
788 template<
typename _CVRef,
typename _Tuple>
790 operator()(_CVRef& __arg, _Tuple&)
const volatile
791 {
return __arg.get(); }
800 template<
typename _Arg>
801 class _Mu<_Arg, true, false>
804 template<
typename _CVArg,
typename... _Args>
806 operator()(_CVArg& __arg,
808 -> decltype(__arg(declval<_Args>()...))
811 typedef typename _Build_index_tuple<
sizeof...(_Args)>::__type
813 return this->__call(__arg, __tuple, _Indexes());
819 template<
typename _CVArg,
typename... _Args, std::size_t... _Indexes>
822 const _Index_tuple<_Indexes...>&)
const volatile
823 -> decltype(__arg(declval<_Args>()...))
825 return __arg(std::forward<_Args>(std::get<_Indexes>(__tuple))...);
834 template<
typename _Arg>
835 class _Mu<_Arg, false, true>
838 template<
typename _Tuple>
839 _Safe_tuple_element_t<(is_placeholder<_Arg>::value - 1), _Tuple>&&
840 operator()(
const volatile _Arg&, _Tuple& __tuple)
const volatile
843 = __tuple_element_t<(is_placeholder<_Arg>::value - 1), _Tuple>;
844 return std::forward<__type>(
845 ::std::get<(is_placeholder<_Arg>::value - 1)>(__tuple));
854 template<
typename _Arg>
855 class _Mu<_Arg, false, false>
858 template<
typename _CVArg,
typename _Tuple>
860 operator()(_CVArg&& __arg, _Tuple&)
const volatile
861 {
return std::forward<_CVArg>(__arg); }
869 template<
typename _Tp>
874 static constexpr
const _Tp&
875 __do_wrap(
const _Tp& __x)
878 static constexpr _Tp&&
880 {
return static_cast<_Tp&&
>(__x); }
888 template<
typename _Tp,
typename _Class>
891 typedef _Mem_fn<_Tp _Class::*> type;
893 static constexpr type
894 __do_wrap(_Tp _Class::* __pm)
895 {
return type(__pm); }
909 template<std::size_t _Ind,
typename... _Tp>
911 __volget(
volatile tuple<_Tp...>& __tuple)
912 -> __tuple_element_t<_Ind, tuple<_Tp...>>
volatile&
913 {
return std::get<_Ind>(
const_cast<tuple<_Tp...
>&>(__tuple)); }
916 template<std::size_t _Ind,
typename... _Tp>
918 __volget(
const volatile tuple<_Tp...>& __tuple)
919 -> __tuple_element_t<_Ind, tuple<_Tp...>>
const volatile&
920 {
return std::get<_Ind>(
const_cast<const tuple<_Tp...
>&>(__tuple)); }
923 template<
typename _Signature>
926 template<
typename _Functor,
typename... _Bound_args>
927 class _Bind<_Functor(_Bound_args...)>
930 typedef _Bind __self_type;
931 typedef typename _Build_index_tuple<
sizeof...(_Bound_args)>::__type
935 tuple<_Bound_args...> _M_bound_args;
938 template<
typename _Result,
typename... _Args, std::size_t... _Indexes>
943 (std::get<_Indexes>(_M_bound_args), __args)...);
947 template<
typename _Result,
typename... _Args, std::size_t... _Indexes>
952 (std::get<_Indexes>(_M_bound_args), __args)...);
956 template<
typename _Result,
typename... _Args, std::size_t... _Indexes>
958 __call_v(tuple<_Args...>&& __args,
959 _Index_tuple<_Indexes...>)
volatile
961 return _M_f(_Mu<_Bound_args>()
962 (__volget<_Indexes>(_M_bound_args), __args)...);
966 template<
typename _Result,
typename... _Args, std::size_t... _Indexes>
968 __call_c_v(tuple<_Args...>&& __args,
969 _Index_tuple<_Indexes...>)
const volatile
971 return _M_f(_Mu<_Bound_args>()
972 (__volget<_Indexes>(_M_bound_args), __args)...);
976 template<
typename... _Args>
977 explicit _Bind(
const _Functor& __f, _Args&&... __args)
978 : _M_f(__f), _M_bound_args(std::
forward<_Args>(__args)...)
981 template<
typename... _Args>
982 explicit _Bind(_Functor&& __f, _Args&&... __args)
983 : _M_f(std::move(__f)), _M_bound_args(std::
forward<_Args>(__args)...)
986 _Bind(
const _Bind&) =
default;
989 : _M_f(std::move(__b._M_f)), _M_bound_args(std::move(__b._M_bound_args))
993 template<
typename... _Args,
typename _Result
994 = decltype( std::declval<_Functor&>()(
995 _Mu<_Bound_args>()( std::declval<_Bound_args&>(),
996 std::declval<tuple<_Args...>&>() )... ) )>
998 operator()(_Args&&... __args)
1000 return this->__call<_Result>(
1001 std::forward_as_tuple(std::forward<_Args>(__args)...),
1006 template<
typename... _Args,
typename _Result
1007 = decltype( std::declval<
typename enable_if<(
sizeof...(_Args) >= 0),
1008 typename add_const<_Functor>::type&>::type>()(
1009 _Mu<_Bound_args>()( std::declval<const _Bound_args&>(),
1010 std::declval<tuple<_Args...>&>() )... ) )>
1012 operator()(_Args&&... __args)
const
1014 return this->__call_c<_Result>(
1015 std::forward_as_tuple(std::forward<_Args>(__args)...),
1020 template<
typename... _Args,
typename _Result
1021 = decltype( std::declval<
typename enable_if<(
sizeof...(_Args) >= 0),
1022 typename add_volatile<_Functor>::type&>::type>()(
1023 _Mu<_Bound_args>()( std::declval<volatile _Bound_args&>(),
1024 std::declval<tuple<_Args...>&>() )... ) )>
1026 operator()(_Args&&... __args)
volatile
1028 return this->__call_v<_Result>(
1029 std::forward_as_tuple(std::forward<_Args>(__args)...),
1034 template<
typename... _Args,
typename _Result
1035 = decltype( std::declval<
typename enable_if<(
sizeof...(_Args) >= 0),
1036 typename add_cv<_Functor>::type&>::type>()(
1037 _Mu<_Bound_args>()( std::declval<const volatile _Bound_args&>(),
1038 std::declval<tuple<_Args...>&>() )... ) )>
1040 operator()(_Args&&... __args)
const volatile
1042 return this->__call_c_v<_Result>(
1043 std::forward_as_tuple(std::forward<_Args>(__args)...),
1049 template<
typename _Result,
typename _Signature>
1052 template<
typename _Result,
typename _Functor,
typename... _Bound_args>
1056 typedef typename _Build_index_tuple<
sizeof...(_Bound_args)>::__type
1060 tuple<_Bound_args...> _M_bound_args;
1063 template<
typename _Res>
1064 struct __enable_if_void : enable_if<is_void<_Res>::value, int> { };
1065 template<
typename _Res>
1066 struct __disable_if_void : enable_if<!is_void<_Res>::value, int> { };
1069 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1071 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1072 typename __disable_if_void<_Res>::type = 0)
1074 return _M_f(_Mu<_Bound_args>()
1075 (std::get<_Indexes>(_M_bound_args), __args)...);
1079 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1081 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1082 typename __enable_if_void<_Res>::type = 0)
1084 _M_f(_Mu<_Bound_args>()
1085 (std::get<_Indexes>(_M_bound_args), __args)...);
1089 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1091 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1092 typename __disable_if_void<_Res>::type = 0)
const
1094 return _M_f(_Mu<_Bound_args>()
1095 (std::get<_Indexes>(_M_bound_args), __args)...);
1099 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1101 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1102 typename __enable_if_void<_Res>::type = 0)
const
1104 _M_f(_Mu<_Bound_args>()
1105 (std::get<_Indexes>(_M_bound_args), __args)...);
1109 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1111 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1112 typename __disable_if_void<_Res>::type = 0)
volatile
1114 return _M_f(_Mu<_Bound_args>()
1115 (__volget<_Indexes>(_M_bound_args), __args)...);
1119 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1121 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1122 typename __enable_if_void<_Res>::type = 0)
volatile
1124 _M_f(_Mu<_Bound_args>()
1125 (__volget<_Indexes>(_M_bound_args), __args)...);
1129 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1131 __call(tuple<_Args...>&& __args, _Index_tuple<_Indexes...>,
1132 typename __disable_if_void<_Res>::type = 0)
const volatile
1134 return _M_f(_Mu<_Bound_args>()
1135 (__volget<_Indexes>(_M_bound_args), __args)...);
1139 template<
typename _Res,
typename... _Args, std::size_t... _Indexes>
1141 __call(tuple<_Args...>&& __args,
1142 _Index_tuple<_Indexes...>,
1143 typename __enable_if_void<_Res>::type = 0)
const volatile
1145 _M_f(_Mu<_Bound_args>()
1146 (__volget<_Indexes>(_M_bound_args), __args)...);
1150 typedef _Result result_type;
1152 template<
typename... _Args>
1153 explicit _Bind_result(
const _Functor& __f, _Args&&... __args)
1154 : _M_f(__f), _M_bound_args(std::
forward<_Args>(__args)...)
1157 template<
typename... _Args>
1158 explicit _Bind_result(_Functor&& __f, _Args&&... __args)
1159 : _M_f(std::move(__f)), _M_bound_args(std::
forward<_Args>(__args)...)
1162 _Bind_result(
const _Bind_result&) =
default;
1164 _Bind_result(_Bind_result&& __b)
1165 : _M_f(std::move(__b._M_f)), _M_bound_args(std::move(__b._M_bound_args))
1169 template<
typename... _Args>
1171 operator()(_Args&&... __args)
1173 return this->__call<_Result>(
1174 std::forward_as_tuple(std::forward<_Args>(__args)...),
1179 template<
typename... _Args>
1181 operator()(_Args&&... __args)
const
1183 return this->__call<_Result>(
1184 std::forward_as_tuple(std::forward<_Args>(__args)...),
1189 template<
typename... _Args>
1191 operator()(_Args&&... __args)
volatile
1193 return this->__call<_Result>(
1194 std::forward_as_tuple(std::forward<_Args>(__args)...),
1199 template<
typename... _Args>
1201 operator()(_Args&&... __args)
const volatile
1203 return this->__call<_Result>(
1204 std::forward_as_tuple(std::forward<_Args>(__args)...),
1213 template<
typename _Signature>
1215 :
public true_type { };
1221 template<
typename _Signature>
1223 :
public true_type { };
1229 template<
typename _Signature>
1231 :
public true_type { };
1237 template<
typename _Signature>
1239 :
public true_type { };
1245 template<
typename _Result,
typename _Signature>
1247 :
public true_type { };
1253 template<
typename _Result,
typename _Signature>
1255 :
public true_type { };
1261 template<
typename _Result,
typename _Signature>
1263 :
public true_type { };
1269 template<
typename _Result,
typename _Signature>
1271 :
public true_type { };
1273 template<
typename _Func,
typename... _BoundArgs>
1274 struct _Bind_check_arity { };
1276 template<
typename _Ret,
typename... _Args,
typename... _BoundArgs>
1277 struct _Bind_check_arity<_Ret (*)(_Args...), _BoundArgs...>
1279 static_assert(
sizeof...(_BoundArgs) ==
sizeof...(_Args),
1280 "Wrong number of arguments for function");
1283 template<
typename _Ret,
typename... _Args,
typename... _BoundArgs>
1284 struct _Bind_check_arity<_Ret (*)(_Args......), _BoundArgs...>
1286 static_assert(
sizeof...(_BoundArgs) >=
sizeof...(_Args),
1287 "Wrong number of arguments for function");
1290 template<
typename _Tp,
typename _Class,
typename... _BoundArgs>
1291 struct _Bind_check_arity<_Tp _Class::*, _BoundArgs...>
1293 using _Arity =
typename _Mem_fn<_Tp _Class::*>::_Arity;
1294 using _Varargs =
typename _Mem_fn<_Tp _Class::*>::_Varargs;
1295 static_assert(_Varargs::value
1296 ?
sizeof...(_BoundArgs) >= _Arity::value + 1
1297 :
sizeof...(_BoundArgs) == _Arity::value + 1,
1298 "Wrong number of arguments for pointer-to-member");
1304 template<typename _Tp, typename _Tp2 = typename decay<_Tp>::type>
1305 using __is_socketlike = __or_<is_integral<_Tp2>, is_enum<_Tp2>>;
1307 template<
bool _SocketLike,
typename _Func,
typename... _BoundArgs>
1309 : _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...>
1311 typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type>
1313 typedef typename __maybe_type::type __func_type;
1314 typedef _Bind<__func_type(typename decay<_BoundArgs>::type...)> type;
1320 template<
typename _Func,
typename... _BoundArgs>
1321 struct _Bind_helper<true, _Func, _BoundArgs...>
1328 template<
typename _Func,
typename... _BoundArgs>
1330 _Bind_helper<__is_socketlike<_Func>::value, _Func, _BoundArgs...>::type
1331 bind(_Func&& __f, _BoundArgs&&... __args)
1333 typedef _Bind_helper<
false, _Func, _BoundArgs...> __helper_type;
1334 typedef typename __helper_type::__maybe_type __maybe_type;
1335 typedef typename __helper_type::type __result_type;
1336 return __result_type(__maybe_type::__do_wrap(std::forward<_Func>(__f)),
1337 std::forward<_BoundArgs>(__args)...);
1340 template<
typename _Result,
typename _Func,
typename... _BoundArgs>
1341 struct _Bindres_helper
1342 : _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...>
1344 typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type>
1346 typedef typename __maybe_type::type __functor_type;
1347 typedef _Bind_result<_Result,
1348 __functor_type(
typename decay<_BoundArgs>::type...)>
1356 template<
typename _Result,
typename _Func,
typename... _BoundArgs>
1358 typename _Bindres_helper<_Result, _Func, _BoundArgs...>::type
1359 bind(_Func&& __f, _BoundArgs&&... __args)
1361 typedef _Bindres_helper<_Result, _Func, _BoundArgs...> __helper_type;
1362 typedef typename __helper_type::__maybe_type __maybe_type;
1363 typedef typename __helper_type::type __result_type;
1364 return __result_type(__maybe_type::__do_wrap(std::forward<_Func>(__f)),
1365 std::forward<_BoundArgs>(__args)...);
1368 template<
typename _Signature>
1369 struct _Bind_simple;
1371 template<
typename _Callable,
typename... _Args>
1372 struct _Bind_simple<_Callable(_Args...)>
1374 typedef typename result_of<_Callable(_Args...)>::type result_type;
1376 template<
typename _Tp,
typename... _Up>
1378 _Bind_simple(_Tp&& __f, _Up&&... __args)
1382 _Bind_simple(
const _Bind_simple&) =
default;
1383 _Bind_simple(_Bind_simple&&) =
default;
1388 typedef typename _Build_index_tuple<
sizeof...(_Args)>::__type _Indices;
1389 return _M_invoke(_Indices());
1393 template<std::size_t... _Indices>
1394 typename result_of<_Callable(_Args...)>::type
1395 _M_invoke(_Index_tuple<_Indices...>)
1399 return std::forward<_Callable>(std::get<0>(_M_bound))(
1400 std::forward<_Args>(std::get<_Indices+1>(_M_bound))...);
1406 template<
typename _Func,
typename... _BoundArgs>
1407 struct _Bind_simple_helper
1408 : _Bind_check_arity<typename decay<_Func>::type, _BoundArgs...>
1410 typedef _Maybe_wrap_member_pointer<typename decay<_Func>::type>
1412 typedef typename __maybe_type::type __func_type;
1413 typedef _Bind_simple<__func_type(typename decay<_BoundArgs>::type...)>
1419 template<
typename _Callable,
typename... _Args>
1420 typename _Bind_simple_helper<_Callable, _Args...>::__type
1421 __bind_simple(_Callable&& __callable, _Args&&... __args)
1423 typedef _Bind_simple_helper<_Callable, _Args...> __helper_type;
1424 typedef typename __helper_type::__maybe_type __maybe_type;
1425 typedef typename __helper_type::__type __result_type;
1426 return __result_type(
1427 __maybe_type::__do_wrap( std::forward<_Callable>(__callable)),
1428 std::forward<_Args>(__args)...);
1441 const char*
what()
const noexcept;
1450 template<
typename _Tp>
1452 : is_trivially_copyable<_Tp>
::type
1455 class _Undefined_class;
1460 const void* _M_const_object;
1461 void (*_M_function_pointer)();
1462 void (_Undefined_class::*_M_member_pointer)();
1467 void* _M_access() {
return &_M_pod_data[0]; }
1468 const void* _M_access()
const {
return &_M_pod_data[0]; }
1470 template<
typename _Tp>
1473 {
return *
static_cast<_Tp*
>(_M_access()); }
1475 template<
typename _Tp>
1478 {
return *
static_cast<const _Tp*
>(_M_access()); }
1480 _Nocopy_types _M_unused;
1481 char _M_pod_data[
sizeof(_Nocopy_types)];
1484 enum _Manager_operation
1494 template<
typename _Tp>
1495 struct _Simple_type_wrapper
1497 _Simple_type_wrapper(_Tp __value) : __value(__value) { }
1502 template<
typename _Tp>
1503 struct __is_location_invariant<_Simple_type_wrapper<_Tp> >
1504 : __is_location_invariant<_Tp>
1509 template<
typename _Functor>
1511 __callable_functor(_Functor& __f)
1514 template<
typename _Member,
typename _Class>
1515 inline _Mem_fn<_Member _Class::*>
1516 __callable_functor(_Member _Class::* &__p)
1519 template<
typename _Member,
typename _Class>
1520 inline _Mem_fn<_Member _Class::*>
1521 __callable_functor(_Member _Class::*
const &__p)
1524 template<
typename _Member,
typename _Class>
1525 inline _Mem_fn<_Member _Class::*>
1526 __callable_functor(_Member _Class::*
volatile &__p)
1529 template<
typename _Member,
typename _Class>
1530 inline _Mem_fn<_Member _Class::*>
1531 __callable_functor(_Member _Class::*
const volatile &__p)
1534 template<
typename _Signature>
1541 static const std::size_t _M_max_size =
sizeof(_Nocopy_types);
1542 static const std::size_t _M_max_align = __alignof__(_Nocopy_types);
1544 template<
typename _Functor>
1548 static const bool __stored_locally =
1550 &&
sizeof(_Functor) <= _M_max_size
1551 && __alignof__(_Functor) <= _M_max_align
1552 && (_M_max_align % __alignof__(_Functor) == 0));
1558 _M_get_pointer(
const _Any_data& __source)
1560 const _Functor* __ptr =
1562 : __source._M_access<_Functor*>();
1563 return const_cast<_Functor*
>(__ptr);
1569 _M_clone(_Any_data& __dest,
const _Any_data& __source, true_type)
1571 new (__dest._M_access()) _Functor(__source._M_access<_Functor>());
1577 _M_clone(_Any_data& __dest,
const _Any_data& __source, false_type)
1579 __dest._M_access<_Functor*>() =
1580 new _Functor(*__source._M_access<_Functor*>());
1586 _M_destroy(_Any_data& __victim, true_type)
1588 __victim._M_access<_Functor>().~_Functor();
1593 _M_destroy(_Any_data& __victim, false_type)
1595 delete __victim._M_access<_Functor*>();
1600 _M_manager(_Any_data& __dest,
const _Any_data& __source,
1601 _Manager_operation __op)
1606 case __get_type_info:
1607 __dest._M_access<
const type_info*>() = &
typeid(_Functor);
1610 case __get_functor_ptr:
1611 __dest._M_access<_Functor*>() = _M_get_pointer(__source);
1614 case __clone_functor:
1615 _M_clone(__dest, __source, _Local_storage());
1618 case __destroy_functor:
1619 _M_destroy(__dest, _Local_storage());
1626 _M_init_functor(_Any_data& __functor, _Functor&& __f)
1627 { _M_init_functor(__functor, std::move(__f), _Local_storage()); }
1629 template<
typename _Signature>
1631 _M_not_empty_function(
const function<_Signature>& __f)
1632 {
return static_cast<bool>(__f); }
1634 template<
typename _Tp>
1636 _M_not_empty_function(_Tp* __fp)
1637 {
return __fp !=
nullptr; }
1639 template<
typename _Class,
typename _Tp>
1641 _M_not_empty_function(_Tp _Class::* __mp)
1642 {
return __mp !=
nullptr; }
1644 template<
typename _Tp>
1646 _M_not_empty_function(
const _Tp&)
1651 _M_init_functor(_Any_data& __functor, _Functor&& __f, true_type)
1652 {
new (__functor._M_access()) _Functor(std::move(__f)); }
1655 _M_init_functor(_Any_data& __functor, _Functor&& __f, false_type)
1656 { __functor._M_access<_Functor*>() =
new _Functor(std::move(__f)); }
1659 template<
typename _Functor>
1660 class _Ref_manager :
public _Base_manager<_Functor*>
1662 typedef _Function_base::_Base_manager<_Functor*> _Base;
1666 _M_manager(_Any_data& __dest,
const _Any_data& __source,
1667 _Manager_operation __op)
1672 case __get_type_info:
1673 __dest._M_access<
const type_info*>() = &
typeid(_Functor);
1676 case __get_functor_ptr:
1677 __dest._M_access<_Functor*>() = *_Base::_M_get_pointer(__source);
1682 _Base::_M_manager(__dest, __source, __op);
1699 _M_manager(_M_functor, _M_functor, __destroy_functor);
1703 bool _M_empty()
const {
return !_M_manager; }
1705 typedef bool (*_Manager_type)(_Any_data&,
const _Any_data&,
1706 _Manager_operation);
1708 _Any_data _M_functor;
1709 _Manager_type _M_manager;
1712 template<
typename _Signature,
typename _Functor>
1713 class _Function_handler;
1715 template<
typename _Res,
typename _Functor,
typename... _ArgTypes>
1716 class _Function_handler<_Res(_ArgTypes...), _Functor>
1717 :
public _Function_base::_Base_manager<_Functor>
1719 typedef _Function_base::_Base_manager<_Functor> _Base;
1723 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1725 return (*_Base::_M_get_pointer(__functor))(
1726 std::forward<_ArgTypes>(__args)...);
1730 template<
typename _Functor,
typename... _ArgTypes>
1731 class _Function_handler<void(_ArgTypes...), _Functor>
1732 :
public _Function_base::_Base_manager<_Functor>
1734 typedef _Function_base::_Base_manager<_Functor> _Base;
1738 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1740 (*_Base::_M_get_pointer(__functor))(
1741 std::forward<_ArgTypes>(__args)...);
1745 template<
typename _Res,
typename _Functor,
typename... _ArgTypes>
1746 class _Function_handler<_Res(_ArgTypes...), reference_wrapper<_Functor> >
1747 :
public _Function_base::_Ref_manager<_Functor>
1749 typedef _Function_base::_Ref_manager<_Functor> _Base;
1753 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1755 return std::__callable_functor(**_Base::_M_get_pointer(__functor))(
1756 std::forward<_ArgTypes>(__args)...);
1760 template<
typename _Functor,
typename... _ArgTypes>
1761 class _Function_handler<void(_ArgTypes...), reference_wrapper<_Functor> >
1762 :
public _Function_base::_Ref_manager<_Functor>
1764 typedef _Function_base::_Ref_manager<_Functor> _Base;
1768 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1770 std::__callable_functor(**_Base::_M_get_pointer(__functor))(
1771 std::forward<_ArgTypes>(__args)...);
1775 template<
typename _Class,
typename _Member,
typename _Res,
1776 typename... _ArgTypes>
1777 class _Function_handler<_Res(_ArgTypes...), _Member _Class::*>
1778 :
public _Function_handler<void(_ArgTypes...), _Member _Class::*>
1780 typedef _Function_handler<void(_ArgTypes...), _Member _Class::*>
1785 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1787 return std::mem_fn(_Base::_M_get_pointer(__functor)->__value)(
1788 std::forward<_ArgTypes>(__args)...);
1792 template<
typename _Class,
typename _Member,
typename... _ArgTypes>
1793 class _Function_handler<void(_ArgTypes...), _Member _Class::*>
1794 :
public _Function_base::_Base_manager<
1795 _Simple_type_wrapper< _Member _Class::* > >
1797 typedef _Member _Class::* _Functor;
1798 typedef _Simple_type_wrapper<_Functor> _Wrapper;
1799 typedef _Function_base::_Base_manager<_Wrapper> _Base;
1803 _M_manager(_Any_data& __dest,
const _Any_data& __source,
1804 _Manager_operation __op)
1809 case __get_type_info:
1810 __dest._M_access<
const type_info*>() = &
typeid(_Functor);
1813 case __get_functor_ptr:
1814 __dest._M_access<_Functor*>() =
1815 &_Base::_M_get_pointer(__source)->__value;
1819 _Base::_M_manager(__dest, __source, __op);
1825 _M_invoke(
const _Any_data& __functor, _ArgTypes&&... __args)
1827 std::mem_fn(_Base::_M_get_pointer(__functor)->__value)(
1828 std::forward<_ArgTypes>(__args)...);
1832 template<
typename _From,
typename _To>
1833 using __check_func_return_type
1834 = __or_<is_void<_To>, is_same<_From, _To>, is_convertible<_From, _To>>;
1842 template<
typename _Res,
typename... _ArgTypes>
1843 class function<_Res(_ArgTypes...)>
1847 typedef _Res _Signature_type(_ArgTypes...);
1849 template<
typename _Func,
1850 typename _Res2 =
typename result_of<_Func&(_ArgTypes...)>::type>
1851 struct _Callable : __check_func_return_type<_Res2, _Res> { };
1855 template<
typename _Tp>
1856 struct _Callable<function, _Tp> : false_type { };
1858 template<
typename _Cond,
typename _Tp>
1859 using _Requires =
typename enable_if<_Cond::value, _Tp>::type;
1862 typedef _Res result_type;
1877 function(nullptr_t) noexcept
1888 function(
const function& __x);
1920 template<
typename _Functor,
1921 typename = _Requires<__not_<is_same<_Functor, function>>,
void>,
1922 typename = _Requires<_Callable<_Functor>,
void>>
1940 function(__x).
swap(*
this);
1958 function(std::move(__x)).
swap(*
this);
1974 _M_manager(_M_functor, _M_functor, __destroy_functor);
1975 _M_manager =
nullptr;
1976 _M_invoker =
nullptr;
1997 template<
typename _Functor>
1998 _Requires<_Callable<typename decay<_Functor>::type>,
function&>
2001 function(std::forward<_Functor>(__f)).swap(*
this);
2006 template<
typename _Functor>
2010 function(__f).
swap(*
this);
2051 explicit operator bool() const noexcept
2052 {
return !_M_empty(); }
2064 _Res operator()(_ArgTypes... __args)
const;
2077 const type_info& target_type() const noexcept;
2088 template<typename _Functor> _Functor* target() noexcept;
2091 template<typename _Functor> const _Functor* target() const noexcept;
2095 using _Invoker_type = _Res (*)(
const _Any_data&, _ArgTypes&&...);
2096 _Invoker_type _M_invoker;
2100 template<
typename _Res,
typename... _ArgTypes>
2101 function<_Res(_ArgTypes...)>::
2102 function(
const function& __x)
2105 if (static_cast<bool>(__x))
2107 __x._M_manager(_M_functor, __x._M_functor, __clone_functor);
2108 _M_invoker = __x._M_invoker;
2109 _M_manager = __x._M_manager;
2113 template<
typename _Res,
typename... _ArgTypes>
2114 template<
typename _Functor,
typename,
typename>
2115 function<_Res(_ArgTypes...)>::
2116 function(_Functor __f)
2119 typedef _Function_handler<_Signature_type, _Functor> _My_handler;
2121 if (_My_handler::_M_not_empty_function(__f))
2123 _My_handler::_M_init_functor(_M_functor, std::move(__f));
2124 _M_invoker = &_My_handler::_M_invoke;
2125 _M_manager = &_My_handler::_M_manager;
2129 template<
typename _Res,
typename... _ArgTypes>
2131 function<_Res(_ArgTypes...)>::
2132 operator()(_ArgTypes... __args)
const
2135 __throw_bad_function_call();
2136 return _M_invoker(_M_functor, std::forward<_ArgTypes>(__args)...);
2140 template<
typename _Res,
typename... _ArgTypes>
2142 function<_Res(_ArgTypes...)>::
2143 target_type() const noexcept
2147 _Any_data __typeinfo_result;
2148 _M_manager(__typeinfo_result, _M_functor, __get_type_info);
2149 return *__typeinfo_result._M_access<
const type_info*>();
2152 return typeid(void);
2155 template<
typename _Res,
typename... _ArgTypes>
2156 template<
typename _Functor>
2158 function<_Res(_ArgTypes...)>::
2161 if (
typeid(_Functor) == target_type() && _M_manager)
2164 if (_M_manager(__ptr, _M_functor, __get_functor_ptr)
2168 return __ptr._M_access<_Functor*>();
2174 template<
typename _Res,
typename... _ArgTypes>
2175 template<
typename _Functor>
2177 function<_Res(_ArgTypes...)>::
2178 target() const noexcept
2180 if (
typeid(_Functor) == target_type() && _M_manager)
2183 _M_manager(__ptr, _M_functor, __get_functor_ptr);
2184 return __ptr._M_access<
const _Functor*>();
2200 template<
typename _Res,
typename... _Args>
2202 operator==(
const function<_Res(_Args...)>& __f, nullptr_t) noexcept
2203 {
return !
static_cast<bool>(__f); }
2206 template<
typename _Res,
typename... _Args>
2208 operator==(nullptr_t,
const function<_Res(_Args...)>& __f) noexcept
2209 {
return !
static_cast<bool>(__f); }
2218 template<
typename _Res,
typename... _Args>
2220 operator!=(
const function<_Res(_Args...)>& __f, nullptr_t) noexcept
2221 {
return static_cast<bool>(__f); }
2224 template<
typename _Res,
typename... _Args>
2226 operator!=(nullptr_t,
const function<_Res(_Args...)>& __f) noexcept
2227 {
return static_cast<bool>(__f); }
2236 template<
typename _Res,
typename... _Args>
2238 swap(
function<_Res(_Args...)>& __x,
function<_Res(_Args...)>& __y)
2241 _GLIBCXX_END_NAMESPACE_VERSION
2246 #endif // _GLIBCXX_FUNCTIONAL
result_of< _Callable &&(_Args &&...)>::type __invoke(_Callable &&__fn, _Args &&...__args)
Invoke a callable object.
Type of the function object returned from bind<R>().
The type of placeholder objects defined by libstdc++.
_Bind_helper< __is_socketlike< _Func >::value, _Func, _BoundArgs...>::type bind(_Func &&__f, _BoundArgs &&...__args)
Function template for std::bind.
reference_wrapper< _Tp > ref(_Tp &__t) noexcept
Denotes a reference should be taken to a variable.
integral_constant< bool, false > false_type
The type used as a compile-time boolean with false value.
Type of the function object returned from bind().
Base class of all polymorphic function object wrappers.
_Tp * __addressof(_Tp &__r) noexcept
Same as C++11 std::addressof.
_Requires< _Callable< typename decay< _Functor >::type >, function & > operator=(_Functor &&__f)
Function assignment to a new target.
Base class for all library exceptions.
void swap(function &__x)
Swap the targets of two function objects.
_Mem_fn< _Tp _Class::* > mem_fn(_Tp _Class::*) noexcept
Returns a function object that forwards to the member pointer pm.
const char * what() const noexcept
Determines if the given type _Tp is a function object that should be treated as a subexpression when ...
constexpr _Tp && forward(typename std::remove_reference< _Tp >::type &__t) noexcept
Forward an lvalue.
Primary class template, tuple.
function & operator=(reference_wrapper< _Functor > __f) noexcept
void swap(basic_filebuf< _CharT, _Traits > &__x, basic_filebuf< _CharT, _Traits > &__y)
Swap specialization for filebufs.
function & operator=(nullptr_t) noexcept
Function assignment to zero.
function & operator=(const function &__x)
Function assignment operator.
If we have found a result_type, extract it.
integral_constant< bool, true > true_type
The type used as a compile-time boolean with true value.
reference_wrapper< const _Tp > cref(const _Tp &__t) noexcept
Denotes a const reference should be taken to a variable.
Determines if the given type _Tp is a placeholder in a bind() expression and, if so, which placeholder it is.
Exception class thrown when class template function's operator() is called with an empty target...
Primary class template for reference_wrapper.
function & operator=(function &&__x)
Function move-assignment operator.