1// -*- C++ -*- 2//===------------------------ functional ----------------------------------===// 3// 4// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 5// See https://llvm.org/LICENSE.txt for license information. 6// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 7// 8//===----------------------------------------------------------------------===// 9 10#ifndef _LIBCPP_FUNCTIONAL 11#define _LIBCPP_FUNCTIONAL 12 13/* 14 functional synopsis 15 16namespace std 17{ 18 19template <class Arg, class Result> 20struct unary_function 21{ 22 typedef Arg argument_type; 23 typedef Result result_type; 24}; 25 26template <class Arg1, class Arg2, class Result> 27struct binary_function 28{ 29 typedef Arg1 first_argument_type; 30 typedef Arg2 second_argument_type; 31 typedef Result result_type; 32}; 33 34template <class T> 35class reference_wrapper 36 : public unary_function<T1, R> // if wrapping a unary functor 37 : public binary_function<T1, T2, R> // if wraping a binary functor 38{ 39public: 40 // types 41 typedef T type; 42 typedef see below result_type; // Not always defined 43 44 // construct/copy/destroy 45 reference_wrapper(T&) noexcept; 46 reference_wrapper(T&&) = delete; // do not bind to temps 47 reference_wrapper(const reference_wrapper<T>& x) noexcept; 48 49 // assignment 50 reference_wrapper& operator=(const reference_wrapper<T>& x) noexcept; 51 52 // access 53 operator T& () const noexcept; 54 T& get() const noexcept; 55 56 // invoke 57 template <class... ArgTypes> 58 typename result_of<T&(ArgTypes&&...)>::type 59 operator() (ArgTypes&&...) const; 60}; 61 62template <class T> reference_wrapper<T> ref(T& t) noexcept; 63template <class T> void ref(const T&& t) = delete; 64template <class T> reference_wrapper<T> ref(reference_wrapper<T>t) noexcept; 65 66template <class T> reference_wrapper<const T> cref(const T& t) noexcept; 67template <class T> void cref(const T&& t) = delete; 68template <class T> reference_wrapper<const T> cref(reference_wrapper<T> t) noexcept; 69 70template <class T> struct unwrap_reference; // since C++20 71template <class T> struct unwrap_ref_decay : unwrap_reference<decay_t<T>> { }; // since C++20 72template <class T> using unwrap_reference_t = typename unwrap_reference<T>::type; // since C++20 73template <class T> using unwrap_ref_decay_t = typename unwrap_ref_decay<T>::type; // since C++20 74 75template <class T> // <class T=void> in C++14 76struct plus : binary_function<T, T, T> 77{ 78 T operator()(const T& x, const T& y) const; 79}; 80 81template <class T> // <class T=void> in C++14 82struct minus : binary_function<T, T, T> 83{ 84 T operator()(const T& x, const T& y) const; 85}; 86 87template <class T> // <class T=void> in C++14 88struct multiplies : binary_function<T, T, T> 89{ 90 T operator()(const T& x, const T& y) const; 91}; 92 93template <class T> // <class T=void> in C++14 94struct divides : binary_function<T, T, T> 95{ 96 T operator()(const T& x, const T& y) const; 97}; 98 99template <class T> // <class T=void> in C++14 100struct modulus : binary_function<T, T, T> 101{ 102 T operator()(const T& x, const T& y) const; 103}; 104 105template <class T> // <class T=void> in C++14 106struct negate : unary_function<T, T> 107{ 108 T operator()(const T& x) const; 109}; 110 111template <class T> // <class T=void> in C++14 112struct equal_to : binary_function<T, T, bool> 113{ 114 bool operator()(const T& x, const T& y) const; 115}; 116 117template <class T> // <class T=void> in C++14 118struct not_equal_to : binary_function<T, T, bool> 119{ 120 bool operator()(const T& x, const T& y) const; 121}; 122 123template <class T> // <class T=void> in C++14 124struct greater : binary_function<T, T, bool> 125{ 126 bool operator()(const T& x, const T& y) const; 127}; 128 129template <class T> // <class T=void> in C++14 130struct less : binary_function<T, T, bool> 131{ 132 bool operator()(const T& x, const T& y) const; 133}; 134 135template <class T> // <class T=void> in C++14 136struct greater_equal : binary_function<T, T, bool> 137{ 138 bool operator()(const T& x, const T& y) const; 139}; 140 141template <class T> // <class T=void> in C++14 142struct less_equal : binary_function<T, T, bool> 143{ 144 bool operator()(const T& x, const T& y) const; 145}; 146 147template <class T> // <class T=void> in C++14 148struct logical_and : binary_function<T, T, bool> 149{ 150 bool operator()(const T& x, const T& y) const; 151}; 152 153template <class T> // <class T=void> in C++14 154struct logical_or : binary_function<T, T, bool> 155{ 156 bool operator()(const T& x, const T& y) const; 157}; 158 159template <class T> // <class T=void> in C++14 160struct logical_not : unary_function<T, bool> 161{ 162 bool operator()(const T& x) const; 163}; 164 165template <class T> // <class T=void> in C++14 166struct bit_and : unary_function<T, bool> 167{ 168 bool operator()(const T& x, const T& y) const; 169}; 170 171template <class T> // <class T=void> in C++14 172struct bit_or : unary_function<T, bool> 173{ 174 bool operator()(const T& x, const T& y) const; 175}; 176 177template <class T> // <class T=void> in C++14 178struct bit_xor : unary_function<T, bool> 179{ 180 bool operator()(const T& x, const T& y) const; 181}; 182 183template <class T=void> // C++14 184struct bit_xor : unary_function<T, bool> 185{ 186 bool operator()(const T& x) const; 187}; 188 189template <class Predicate> 190class unary_negate // deprecated in C++17 191 : public unary_function<typename Predicate::argument_type, bool> 192{ 193public: 194 explicit unary_negate(const Predicate& pred); 195 bool operator()(const typename Predicate::argument_type& x) const; 196}; 197 198template <class Predicate> // deprecated in C++17 199unary_negate<Predicate> not1(const Predicate& pred); 200 201template <class Predicate> 202class binary_negate // deprecated in C++17 203 : public binary_function<typename Predicate::first_argument_type, 204 typename Predicate::second_argument_type, 205 bool> 206{ 207public: 208 explicit binary_negate(const Predicate& pred); 209 bool operator()(const typename Predicate::first_argument_type& x, 210 const typename Predicate::second_argument_type& y) const; 211}; 212 213template <class Predicate> // deprecated in C++17 214binary_negate<Predicate> not2(const Predicate& pred); 215 216template <class F> unspecified not_fn(F&& f); // C++17 217 218template<class T> struct is_bind_expression; 219template<class T> struct is_placeholder; 220 221 // See C++14 20.9.9, Function object binders 222template <class T> inline constexpr bool is_bind_expression_v 223 = is_bind_expression<T>::value; // C++17 224template <class T> inline constexpr int is_placeholder_v 225 = is_placeholder<T>::value; // C++17 226 227 228template<class Fn, class... BoundArgs> 229 unspecified bind(Fn&&, BoundArgs&&...); 230template<class R, class Fn, class... BoundArgs> 231 unspecified bind(Fn&&, BoundArgs&&...); 232 233template<class F, class... Args> 234 invoke_result_t<F, Args...> invoke(F&& f, Args&&... args) // C++17 235 noexcept(is_nothrow_invocable_v<F, Args...>); 236 237namespace placeholders { 238 // M is the implementation-defined number of placeholders 239 extern unspecified _1; 240 extern unspecified _2; 241 . 242 . 243 . 244 extern unspecified _Mp; 245} 246 247template <class Operation> 248class binder1st // deprecated in C++11, removed in C++17 249 : public unary_function<typename Operation::second_argument_type, 250 typename Operation::result_type> 251{ 252protected: 253 Operation op; 254 typename Operation::first_argument_type value; 255public: 256 binder1st(const Operation& x, const typename Operation::first_argument_type y); 257 typename Operation::result_type operator()( typename Operation::second_argument_type& x) const; 258 typename Operation::result_type operator()(const typename Operation::second_argument_type& x) const; 259}; 260 261template <class Operation, class T> 262binder1st<Operation> bind1st(const Operation& op, const T& x); // deprecated in C++11, removed in C++17 263 264template <class Operation> 265class binder2nd // deprecated in C++11, removed in C++17 266 : public unary_function<typename Operation::first_argument_type, 267 typename Operation::result_type> 268{ 269protected: 270 Operation op; 271 typename Operation::second_argument_type value; 272public: 273 binder2nd(const Operation& x, const typename Operation::second_argument_type y); 274 typename Operation::result_type operator()( typename Operation::first_argument_type& x) const; 275 typename Operation::result_type operator()(const typename Operation::first_argument_type& x) const; 276}; 277 278template <class Operation, class T> 279binder2nd<Operation> bind2nd(const Operation& op, const T& x); // deprecated in C++11, removed in C++17 280 281template <class Arg, class Result> // deprecated in C++11, removed in C++17 282class pointer_to_unary_function : public unary_function<Arg, Result> 283{ 284public: 285 explicit pointer_to_unary_function(Result (*f)(Arg)); 286 Result operator()(Arg x) const; 287}; 288 289template <class Arg, class Result> 290pointer_to_unary_function<Arg,Result> ptr_fun(Result (*f)(Arg)); // deprecated in C++11, removed in C++17 291 292template <class Arg1, class Arg2, class Result> // deprecated in C++11, removed in C++17 293class pointer_to_binary_function : public binary_function<Arg1, Arg2, Result> 294{ 295public: 296 explicit pointer_to_binary_function(Result (*f)(Arg1, Arg2)); 297 Result operator()(Arg1 x, Arg2 y) const; 298}; 299 300template <class Arg1, class Arg2, class Result> 301pointer_to_binary_function<Arg1,Arg2,Result> ptr_fun(Result (*f)(Arg1,Arg2)); // deprecated in C++11, removed in C++17 302 303template<class S, class T> // deprecated in C++11, removed in C++17 304class mem_fun_t : public unary_function<T*, S> 305{ 306public: 307 explicit mem_fun_t(S (T::*p)()); 308 S operator()(T* p) const; 309}; 310 311template<class S, class T, class A> 312class mem_fun1_t : public binary_function<T*, A, S> // deprecated in C++11, removed in C++17 313{ 314public: 315 explicit mem_fun1_t(S (T::*p)(A)); 316 S operator()(T* p, A x) const; 317}; 318 319template<class S, class T> mem_fun_t<S,T> mem_fun(S (T::*f)()); // deprecated in C++11, removed in C++17 320template<class S, class T, class A> mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A)); // deprecated in C++11, removed in C++17 321 322template<class S, class T> 323class mem_fun_ref_t : public unary_function<T, S> // deprecated in C++11, removed in C++17 324{ 325public: 326 explicit mem_fun_ref_t(S (T::*p)()); 327 S operator()(T& p) const; 328}; 329 330template<class S, class T, class A> 331class mem_fun1_ref_t : public binary_function<T, A, S> // deprecated in C++11, removed in C++17 332{ 333public: 334 explicit mem_fun1_ref_t(S (T::*p)(A)); 335 S operator()(T& p, A x) const; 336}; 337 338template<class S, class T> mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)()); // deprecated in C++11, removed in C++17 339template<class S, class T, class A> mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A)); // deprecated in C++11, removed in C++17 340 341template <class S, class T> 342class const_mem_fun_t : public unary_function<const T*, S> // deprecated in C++11, removed in C++17 343{ 344public: 345 explicit const_mem_fun_t(S (T::*p)() const); 346 S operator()(const T* p) const; 347}; 348 349template <class S, class T, class A> 350class const_mem_fun1_t : public binary_function<const T*, A, S> // deprecated in C++11, removed in C++17 351{ 352public: 353 explicit const_mem_fun1_t(S (T::*p)(A) const); 354 S operator()(const T* p, A x) const; 355}; 356 357template <class S, class T> const_mem_fun_t<S,T> mem_fun(S (T::*f)() const); // deprecated in C++11, removed in C++17 358template <class S, class T, class A> const_mem_fun1_t<S,T,A> mem_fun(S (T::*f)(A) const); // deprecated in C++11, removed in C++17 359 360template <class S, class T> 361class const_mem_fun_ref_t : public unary_function<T, S> // deprecated in C++11, removed in C++17 362{ 363public: 364 explicit const_mem_fun_ref_t(S (T::*p)() const); 365 S operator()(const T& p) const; 366}; 367 368template <class S, class T, class A> 369class const_mem_fun1_ref_t : public binary_function<T, A, S> // deprecated in C++11, removed in C++17 370{ 371public: 372 explicit const_mem_fun1_ref_t(S (T::*p)(A) const); 373 S operator()(const T& p, A x) const; 374}; 375 376template <class S, class T> const_mem_fun_ref_t<S,T> mem_fun_ref(S (T::*f)() const); // deprecated in C++11, removed in C++17 377template <class S, class T, class A> const_mem_fun1_ref_t<S,T,A> mem_fun_ref(S (T::*f)(A) const); // deprecated in C++11, removed in C++17 378 379template<class R, class T> unspecified mem_fn(R T::*); 380 381class bad_function_call 382 : public exception 383{ 384}; 385 386template<class> class function; // undefined 387 388template<class R, class... ArgTypes> 389class function<R(ArgTypes...)> 390 : public unary_function<T1, R> // iff sizeof...(ArgTypes) == 1 and 391 // ArgTypes contains T1 392 : public binary_function<T1, T2, R> // iff sizeof...(ArgTypes) == 2 and 393 // ArgTypes contains T1 and T2 394{ 395public: 396 typedef R result_type; 397 398 // construct/copy/destroy: 399 function() noexcept; 400 function(nullptr_t) noexcept; 401 function(const function&); 402 function(function&&) noexcept; 403 template<class F> 404 function(F); 405 template<Allocator Alloc> 406 function(allocator_arg_t, const Alloc&) noexcept; // removed in C++17 407 template<Allocator Alloc> 408 function(allocator_arg_t, const Alloc&, nullptr_t) noexcept; // removed in C++17 409 template<Allocator Alloc> 410 function(allocator_arg_t, const Alloc&, const function&); // removed in C++17 411 template<Allocator Alloc> 412 function(allocator_arg_t, const Alloc&, function&&); // removed in C++17 413 template<class F, Allocator Alloc> 414 function(allocator_arg_t, const Alloc&, F); // removed in C++17 415 416 function& operator=(const function&); 417 function& operator=(function&&) noexcept; 418 function& operator=(nullptr_t) noexcept; 419 template<class F> 420 function& operator=(F&&); 421 template<class F> 422 function& operator=(reference_wrapper<F>) noexcept; 423 424 ~function(); 425 426 // function modifiers: 427 void swap(function&) noexcept; 428 template<class F, class Alloc> 429 void assign(F&&, const Alloc&); // Removed in C++17 430 431 // function capacity: 432 explicit operator bool() const noexcept; 433 434 // function invocation: 435 R operator()(ArgTypes...) const; 436 437 // function target access: 438 const std::type_info& target_type() const noexcept; 439 template <typename T> T* target() noexcept; 440 template <typename T> const T* target() const noexcept; 441}; 442 443// Deduction guides 444template<class R, class ...Args> 445function(R(*)(Args...)) -> function<R(Args...)>; // since C++17 446 447template<class F> 448function(F) -> function<see-below>; // since C++17 449 450// Null pointer comparisons: 451template <class R, class ... ArgTypes> 452 bool operator==(const function<R(ArgTypes...)>&, nullptr_t) noexcept; 453 454template <class R, class ... ArgTypes> 455 bool operator==(nullptr_t, const function<R(ArgTypes...)>&) noexcept; 456 457template <class R, class ... ArgTypes> 458 bool operator!=(const function<R(ArgTypes...)>&, nullptr_t) noexcept; 459 460template <class R, class ... ArgTypes> 461 bool operator!=(nullptr_t, const function<R(ArgTypes...)>&) noexcept; 462 463// specialized algorithms: 464template <class R, class ... ArgTypes> 465 void swap(function<R(ArgTypes...)>&, function<R(ArgTypes...)>&) noexcept; 466 467template <class T> struct hash; 468 469template <> struct hash<bool>; 470template <> struct hash<char>; 471template <> struct hash<signed char>; 472template <> struct hash<unsigned char>; 473template <> struct hash<char16_t>; 474template <> struct hash<char32_t>; 475template <> struct hash<wchar_t>; 476template <> struct hash<short>; 477template <> struct hash<unsigned short>; 478template <> struct hash<int>; 479template <> struct hash<unsigned int>; 480template <> struct hash<long>; 481template <> struct hash<long long>; 482template <> struct hash<unsigned long>; 483template <> struct hash<unsigned long long>; 484 485template <> struct hash<float>; 486template <> struct hash<double>; 487template <> struct hash<long double>; 488 489template<class T> struct hash<T*>; 490template <> struct hash<nullptr_t>; // C++17 491 492} // std 493 494POLICY: For non-variadic implementations, the number of arguments is limited 495 to 3. It is hoped that the need for non-variadic implementations 496 will be minimal. 497 498*/ 499 500#include <__config> 501#include <type_traits> 502#include <typeinfo> 503#include <exception> 504#include <memory> 505#include <tuple> 506#include <utility> 507#include <version> 508 509#include <__functional_base> 510 511#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 512#pragma GCC system_header 513#endif 514 515_LIBCPP_BEGIN_NAMESPACE_STD 516 517#if _LIBCPP_STD_VER > 11 518template <class _Tp = void> 519#else 520template <class _Tp> 521#endif 522struct _LIBCPP_TEMPLATE_VIS plus : binary_function<_Tp, _Tp, _Tp> 523{ 524 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 525 _Tp operator()(const _Tp& __x, const _Tp& __y) const 526 {return __x + __y;} 527}; 528 529#if _LIBCPP_STD_VER > 11 530template <> 531struct _LIBCPP_TEMPLATE_VIS plus<void> 532{ 533 template <class _T1, class _T2> 534 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 535 auto operator()(_T1&& __t, _T2&& __u) const 536 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u))) 537 -> decltype (_VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u)) 538 { return _VSTD::forward<_T1>(__t) + _VSTD::forward<_T2>(__u); } 539 typedef void is_transparent; 540}; 541#endif 542 543 544#if _LIBCPP_STD_VER > 11 545template <class _Tp = void> 546#else 547template <class _Tp> 548#endif 549struct _LIBCPP_TEMPLATE_VIS minus : binary_function<_Tp, _Tp, _Tp> 550{ 551 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 552 _Tp operator()(const _Tp& __x, const _Tp& __y) const 553 {return __x - __y;} 554}; 555 556#if _LIBCPP_STD_VER > 11 557template <> 558struct _LIBCPP_TEMPLATE_VIS minus<void> 559{ 560 template <class _T1, class _T2> 561 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 562 auto operator()(_T1&& __t, _T2&& __u) const 563 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) - _VSTD::forward<_T2>(__u))) 564 -> decltype (_VSTD::forward<_T1>(__t) - _VSTD::forward<_T2>(__u)) 565 { return _VSTD::forward<_T1>(__t) - _VSTD::forward<_T2>(__u); } 566 typedef void is_transparent; 567}; 568#endif 569 570 571#if _LIBCPP_STD_VER > 11 572template <class _Tp = void> 573#else 574template <class _Tp> 575#endif 576struct _LIBCPP_TEMPLATE_VIS multiplies : binary_function<_Tp, _Tp, _Tp> 577{ 578 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 579 _Tp operator()(const _Tp& __x, const _Tp& __y) const 580 {return __x * __y;} 581}; 582 583#if _LIBCPP_STD_VER > 11 584template <> 585struct _LIBCPP_TEMPLATE_VIS multiplies<void> 586{ 587 template <class _T1, class _T2> 588 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 589 auto operator()(_T1&& __t, _T2&& __u) const 590 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) * _VSTD::forward<_T2>(__u))) 591 -> decltype (_VSTD::forward<_T1>(__t) * _VSTD::forward<_T2>(__u)) 592 { return _VSTD::forward<_T1>(__t) * _VSTD::forward<_T2>(__u); } 593 typedef void is_transparent; 594}; 595#endif 596 597 598#if _LIBCPP_STD_VER > 11 599template <class _Tp = void> 600#else 601template <class _Tp> 602#endif 603struct _LIBCPP_TEMPLATE_VIS divides : binary_function<_Tp, _Tp, _Tp> 604{ 605 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 606 _Tp operator()(const _Tp& __x, const _Tp& __y) const 607 {return __x / __y;} 608}; 609 610#if _LIBCPP_STD_VER > 11 611template <> 612struct _LIBCPP_TEMPLATE_VIS divides<void> 613{ 614 template <class _T1, class _T2> 615 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 616 auto operator()(_T1&& __t, _T2&& __u) const 617 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) / _VSTD::forward<_T2>(__u))) 618 -> decltype (_VSTD::forward<_T1>(__t) / _VSTD::forward<_T2>(__u)) 619 { return _VSTD::forward<_T1>(__t) / _VSTD::forward<_T2>(__u); } 620 typedef void is_transparent; 621}; 622#endif 623 624 625#if _LIBCPP_STD_VER > 11 626template <class _Tp = void> 627#else 628template <class _Tp> 629#endif 630struct _LIBCPP_TEMPLATE_VIS modulus : binary_function<_Tp, _Tp, _Tp> 631{ 632 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 633 _Tp operator()(const _Tp& __x, const _Tp& __y) const 634 {return __x % __y;} 635}; 636 637#if _LIBCPP_STD_VER > 11 638template <> 639struct _LIBCPP_TEMPLATE_VIS modulus<void> 640{ 641 template <class _T1, class _T2> 642 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 643 auto operator()(_T1&& __t, _T2&& __u) const 644 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) % _VSTD::forward<_T2>(__u))) 645 -> decltype (_VSTD::forward<_T1>(__t) % _VSTD::forward<_T2>(__u)) 646 { return _VSTD::forward<_T1>(__t) % _VSTD::forward<_T2>(__u); } 647 typedef void is_transparent; 648}; 649#endif 650 651 652#if _LIBCPP_STD_VER > 11 653template <class _Tp = void> 654#else 655template <class _Tp> 656#endif 657struct _LIBCPP_TEMPLATE_VIS negate : unary_function<_Tp, _Tp> 658{ 659 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 660 _Tp operator()(const _Tp& __x) const 661 {return -__x;} 662}; 663 664#if _LIBCPP_STD_VER > 11 665template <> 666struct _LIBCPP_TEMPLATE_VIS negate<void> 667{ 668 template <class _Tp> 669 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 670 auto operator()(_Tp&& __x) const 671 _NOEXCEPT_(noexcept(- _VSTD::forward<_Tp>(__x))) 672 -> decltype (- _VSTD::forward<_Tp>(__x)) 673 { return - _VSTD::forward<_Tp>(__x); } 674 typedef void is_transparent; 675}; 676#endif 677 678 679#if _LIBCPP_STD_VER > 11 680template <class _Tp = void> 681#else 682template <class _Tp> 683#endif 684struct _LIBCPP_TEMPLATE_VIS equal_to : binary_function<_Tp, _Tp, bool> 685{ 686 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 687 bool operator()(const _Tp& __x, const _Tp& __y) const 688 {return __x == __y;} 689}; 690 691#if _LIBCPP_STD_VER > 11 692template <> 693struct _LIBCPP_TEMPLATE_VIS equal_to<void> 694{ 695 template <class _T1, class _T2> 696 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 697 auto operator()(_T1&& __t, _T2&& __u) const 698 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) == _VSTD::forward<_T2>(__u))) 699 -> decltype (_VSTD::forward<_T1>(__t) == _VSTD::forward<_T2>(__u)) 700 { return _VSTD::forward<_T1>(__t) == _VSTD::forward<_T2>(__u); } 701 typedef void is_transparent; 702}; 703#endif 704 705 706#if _LIBCPP_STD_VER > 11 707template <class _Tp = void> 708#else 709template <class _Tp> 710#endif 711struct _LIBCPP_TEMPLATE_VIS not_equal_to : binary_function<_Tp, _Tp, bool> 712{ 713 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 714 bool operator()(const _Tp& __x, const _Tp& __y) const 715 {return __x != __y;} 716}; 717 718#if _LIBCPP_STD_VER > 11 719template <> 720struct _LIBCPP_TEMPLATE_VIS not_equal_to<void> 721{ 722 template <class _T1, class _T2> 723 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 724 auto operator()(_T1&& __t, _T2&& __u) const 725 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) != _VSTD::forward<_T2>(__u))) 726 -> decltype (_VSTD::forward<_T1>(__t) != _VSTD::forward<_T2>(__u)) 727 { return _VSTD::forward<_T1>(__t) != _VSTD::forward<_T2>(__u); } 728 typedef void is_transparent; 729}; 730#endif 731 732 733#if _LIBCPP_STD_VER > 11 734template <class _Tp = void> 735#else 736template <class _Tp> 737#endif 738struct _LIBCPP_TEMPLATE_VIS greater : binary_function<_Tp, _Tp, bool> 739{ 740 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 741 bool operator()(const _Tp& __x, const _Tp& __y) const 742 {return __x > __y;} 743}; 744 745#if _LIBCPP_STD_VER > 11 746template <> 747struct _LIBCPP_TEMPLATE_VIS greater<void> 748{ 749 template <class _T1, class _T2> 750 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 751 auto operator()(_T1&& __t, _T2&& __u) const 752 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) > _VSTD::forward<_T2>(__u))) 753 -> decltype (_VSTD::forward<_T1>(__t) > _VSTD::forward<_T2>(__u)) 754 { return _VSTD::forward<_T1>(__t) > _VSTD::forward<_T2>(__u); } 755 typedef void is_transparent; 756}; 757#endif 758 759 760// less in <__functional_base> 761 762#if _LIBCPP_STD_VER > 11 763template <class _Tp = void> 764#else 765template <class _Tp> 766#endif 767struct _LIBCPP_TEMPLATE_VIS greater_equal : binary_function<_Tp, _Tp, bool> 768{ 769 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 770 bool operator()(const _Tp& __x, const _Tp& __y) const 771 {return __x >= __y;} 772}; 773 774#if _LIBCPP_STD_VER > 11 775template <> 776struct _LIBCPP_TEMPLATE_VIS greater_equal<void> 777{ 778 template <class _T1, class _T2> 779 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 780 auto operator()(_T1&& __t, _T2&& __u) const 781 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) >= _VSTD::forward<_T2>(__u))) 782 -> decltype (_VSTD::forward<_T1>(__t) >= _VSTD::forward<_T2>(__u)) 783 { return _VSTD::forward<_T1>(__t) >= _VSTD::forward<_T2>(__u); } 784 typedef void is_transparent; 785}; 786#endif 787 788 789#if _LIBCPP_STD_VER > 11 790template <class _Tp = void> 791#else 792template <class _Tp> 793#endif 794struct _LIBCPP_TEMPLATE_VIS less_equal : binary_function<_Tp, _Tp, bool> 795{ 796 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 797 bool operator()(const _Tp& __x, const _Tp& __y) const 798 {return __x <= __y;} 799}; 800 801#if _LIBCPP_STD_VER > 11 802template <> 803struct _LIBCPP_TEMPLATE_VIS less_equal<void> 804{ 805 template <class _T1, class _T2> 806 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 807 auto operator()(_T1&& __t, _T2&& __u) const 808 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) <= _VSTD::forward<_T2>(__u))) 809 -> decltype (_VSTD::forward<_T1>(__t) <= _VSTD::forward<_T2>(__u)) 810 { return _VSTD::forward<_T1>(__t) <= _VSTD::forward<_T2>(__u); } 811 typedef void is_transparent; 812}; 813#endif 814 815 816#if _LIBCPP_STD_VER > 11 817template <class _Tp = void> 818#else 819template <class _Tp> 820#endif 821struct _LIBCPP_TEMPLATE_VIS logical_and : binary_function<_Tp, _Tp, bool> 822{ 823 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 824 bool operator()(const _Tp& __x, const _Tp& __y) const 825 {return __x && __y;} 826}; 827 828#if _LIBCPP_STD_VER > 11 829template <> 830struct _LIBCPP_TEMPLATE_VIS logical_and<void> 831{ 832 template <class _T1, class _T2> 833 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 834 auto operator()(_T1&& __t, _T2&& __u) const 835 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) && _VSTD::forward<_T2>(__u))) 836 -> decltype (_VSTD::forward<_T1>(__t) && _VSTD::forward<_T2>(__u)) 837 { return _VSTD::forward<_T1>(__t) && _VSTD::forward<_T2>(__u); } 838 typedef void is_transparent; 839}; 840#endif 841 842 843#if _LIBCPP_STD_VER > 11 844template <class _Tp = void> 845#else 846template <class _Tp> 847#endif 848struct _LIBCPP_TEMPLATE_VIS logical_or : binary_function<_Tp, _Tp, bool> 849{ 850 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 851 bool operator()(const _Tp& __x, const _Tp& __y) const 852 {return __x || __y;} 853}; 854 855#if _LIBCPP_STD_VER > 11 856template <> 857struct _LIBCPP_TEMPLATE_VIS logical_or<void> 858{ 859 template <class _T1, class _T2> 860 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 861 auto operator()(_T1&& __t, _T2&& __u) const 862 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) || _VSTD::forward<_T2>(__u))) 863 -> decltype (_VSTD::forward<_T1>(__t) || _VSTD::forward<_T2>(__u)) 864 { return _VSTD::forward<_T1>(__t) || _VSTD::forward<_T2>(__u); } 865 typedef void is_transparent; 866}; 867#endif 868 869 870#if _LIBCPP_STD_VER > 11 871template <class _Tp = void> 872#else 873template <class _Tp> 874#endif 875struct _LIBCPP_TEMPLATE_VIS logical_not : unary_function<_Tp, bool> 876{ 877 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 878 bool operator()(const _Tp& __x) const 879 {return !__x;} 880}; 881 882#if _LIBCPP_STD_VER > 11 883template <> 884struct _LIBCPP_TEMPLATE_VIS logical_not<void> 885{ 886 template <class _Tp> 887 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 888 auto operator()(_Tp&& __x) const 889 _NOEXCEPT_(noexcept(!_VSTD::forward<_Tp>(__x))) 890 -> decltype (!_VSTD::forward<_Tp>(__x)) 891 { return !_VSTD::forward<_Tp>(__x); } 892 typedef void is_transparent; 893}; 894#endif 895 896 897#if _LIBCPP_STD_VER > 11 898template <class _Tp = void> 899#else 900template <class _Tp> 901#endif 902struct _LIBCPP_TEMPLATE_VIS bit_and : binary_function<_Tp, _Tp, _Tp> 903{ 904 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 905 _Tp operator()(const _Tp& __x, const _Tp& __y) const 906 {return __x & __y;} 907}; 908 909#if _LIBCPP_STD_VER > 11 910template <> 911struct _LIBCPP_TEMPLATE_VIS bit_and<void> 912{ 913 template <class _T1, class _T2> 914 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 915 auto operator()(_T1&& __t, _T2&& __u) const 916 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) & _VSTD::forward<_T2>(__u))) 917 -> decltype (_VSTD::forward<_T1>(__t) & _VSTD::forward<_T2>(__u)) 918 { return _VSTD::forward<_T1>(__t) & _VSTD::forward<_T2>(__u); } 919 typedef void is_transparent; 920}; 921#endif 922 923 924#if _LIBCPP_STD_VER > 11 925template <class _Tp = void> 926#else 927template <class _Tp> 928#endif 929struct _LIBCPP_TEMPLATE_VIS bit_or : binary_function<_Tp, _Tp, _Tp> 930{ 931 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 932 _Tp operator()(const _Tp& __x, const _Tp& __y) const 933 {return __x | __y;} 934}; 935 936#if _LIBCPP_STD_VER > 11 937template <> 938struct _LIBCPP_TEMPLATE_VIS bit_or<void> 939{ 940 template <class _T1, class _T2> 941 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 942 auto operator()(_T1&& __t, _T2&& __u) const 943 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) | _VSTD::forward<_T2>(__u))) 944 -> decltype (_VSTD::forward<_T1>(__t) | _VSTD::forward<_T2>(__u)) 945 { return _VSTD::forward<_T1>(__t) | _VSTD::forward<_T2>(__u); } 946 typedef void is_transparent; 947}; 948#endif 949 950 951#if _LIBCPP_STD_VER > 11 952template <class _Tp = void> 953#else 954template <class _Tp> 955#endif 956struct _LIBCPP_TEMPLATE_VIS bit_xor : binary_function<_Tp, _Tp, _Tp> 957{ 958 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 959 _Tp operator()(const _Tp& __x, const _Tp& __y) const 960 {return __x ^ __y;} 961}; 962 963#if _LIBCPP_STD_VER > 11 964template <> 965struct _LIBCPP_TEMPLATE_VIS bit_xor<void> 966{ 967 template <class _T1, class _T2> 968 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 969 auto operator()(_T1&& __t, _T2&& __u) const 970 _NOEXCEPT_(noexcept(_VSTD::forward<_T1>(__t) ^ _VSTD::forward<_T2>(__u))) 971 -> decltype (_VSTD::forward<_T1>(__t) ^ _VSTD::forward<_T2>(__u)) 972 { return _VSTD::forward<_T1>(__t) ^ _VSTD::forward<_T2>(__u); } 973 typedef void is_transparent; 974}; 975#endif 976 977 978#if _LIBCPP_STD_VER > 11 979template <class _Tp = void> 980struct _LIBCPP_TEMPLATE_VIS bit_not : unary_function<_Tp, _Tp> 981{ 982 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 983 _Tp operator()(const _Tp& __x) const 984 {return ~__x;} 985}; 986 987template <> 988struct _LIBCPP_TEMPLATE_VIS bit_not<void> 989{ 990 template <class _Tp> 991 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 992 auto operator()(_Tp&& __x) const 993 _NOEXCEPT_(noexcept(~_VSTD::forward<_Tp>(__x))) 994 -> decltype (~_VSTD::forward<_Tp>(__x)) 995 { return ~_VSTD::forward<_Tp>(__x); } 996 typedef void is_transparent; 997}; 998#endif 999 1000template <class _Predicate> 1001class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 unary_negate 1002 : public unary_function<typename _Predicate::argument_type, bool> 1003{ 1004 _Predicate __pred_; 1005public: 1006 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1007 explicit unary_negate(const _Predicate& __pred) 1008 : __pred_(__pred) {} 1009 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1010 bool operator()(const typename _Predicate::argument_type& __x) const 1011 {return !__pred_(__x);} 1012}; 1013 1014template <class _Predicate> 1015_LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1016unary_negate<_Predicate> 1017not1(const _Predicate& __pred) {return unary_negate<_Predicate>(__pred);} 1018 1019template <class _Predicate> 1020class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX17 binary_negate 1021 : public binary_function<typename _Predicate::first_argument_type, 1022 typename _Predicate::second_argument_type, 1023 bool> 1024{ 1025 _Predicate __pred_; 1026public: 1027 _LIBCPP_INLINE_VISIBILITY explicit _LIBCPP_CONSTEXPR_AFTER_CXX11 1028 binary_negate(const _Predicate& __pred) : __pred_(__pred) {} 1029 1030 _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1031 bool operator()(const typename _Predicate::first_argument_type& __x, 1032 const typename _Predicate::second_argument_type& __y) const 1033 {return !__pred_(__x, __y);} 1034}; 1035 1036template <class _Predicate> 1037_LIBCPP_DEPRECATED_IN_CXX17 inline _LIBCPP_CONSTEXPR_AFTER_CXX11 _LIBCPP_INLINE_VISIBILITY 1038binary_negate<_Predicate> 1039not2(const _Predicate& __pred) {return binary_negate<_Predicate>(__pred);} 1040 1041#if _LIBCPP_STD_VER <= 14 || defined(_LIBCPP_ENABLE_CXX17_REMOVED_BINDERS) 1042template <class __Operation> 1043class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binder1st 1044 : public unary_function<typename __Operation::second_argument_type, 1045 typename __Operation::result_type> 1046{ 1047protected: 1048 __Operation op; 1049 typename __Operation::first_argument_type value; 1050public: 1051 _LIBCPP_INLINE_VISIBILITY binder1st(const __Operation& __x, 1052 const typename __Operation::first_argument_type __y) 1053 : op(__x), value(__y) {} 1054 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 1055 (typename __Operation::second_argument_type& __x) const 1056 {return op(value, __x);} 1057 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 1058 (const typename __Operation::second_argument_type& __x) const 1059 {return op(value, __x);} 1060}; 1061 1062template <class __Operation, class _Tp> 1063_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1064binder1st<__Operation> 1065bind1st(const __Operation& __op, const _Tp& __x) 1066 {return binder1st<__Operation>(__op, __x);} 1067 1068template <class __Operation> 1069class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 binder2nd 1070 : public unary_function<typename __Operation::first_argument_type, 1071 typename __Operation::result_type> 1072{ 1073protected: 1074 __Operation op; 1075 typename __Operation::second_argument_type value; 1076public: 1077 _LIBCPP_INLINE_VISIBILITY 1078 binder2nd(const __Operation& __x, const typename __Operation::second_argument_type __y) 1079 : op(__x), value(__y) {} 1080 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 1081 ( typename __Operation::first_argument_type& __x) const 1082 {return op(__x, value);} 1083 _LIBCPP_INLINE_VISIBILITY typename __Operation::result_type operator() 1084 (const typename __Operation::first_argument_type& __x) const 1085 {return op(__x, value);} 1086}; 1087 1088template <class __Operation, class _Tp> 1089_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1090binder2nd<__Operation> 1091bind2nd(const __Operation& __op, const _Tp& __x) 1092 {return binder2nd<__Operation>(__op, __x);} 1093 1094template <class _Arg, class _Result> 1095class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 pointer_to_unary_function 1096 : public unary_function<_Arg, _Result> 1097{ 1098 _Result (*__f_)(_Arg); 1099public: 1100 _LIBCPP_INLINE_VISIBILITY explicit pointer_to_unary_function(_Result (*__f)(_Arg)) 1101 : __f_(__f) {} 1102 _LIBCPP_INLINE_VISIBILITY _Result operator()(_Arg __x) const 1103 {return __f_(__x);} 1104}; 1105 1106template <class _Arg, class _Result> 1107_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1108pointer_to_unary_function<_Arg,_Result> 1109ptr_fun(_Result (*__f)(_Arg)) 1110 {return pointer_to_unary_function<_Arg,_Result>(__f);} 1111 1112template <class _Arg1, class _Arg2, class _Result> 1113class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 pointer_to_binary_function 1114 : public binary_function<_Arg1, _Arg2, _Result> 1115{ 1116 _Result (*__f_)(_Arg1, _Arg2); 1117public: 1118 _LIBCPP_INLINE_VISIBILITY explicit pointer_to_binary_function(_Result (*__f)(_Arg1, _Arg2)) 1119 : __f_(__f) {} 1120 _LIBCPP_INLINE_VISIBILITY _Result operator()(_Arg1 __x, _Arg2 __y) const 1121 {return __f_(__x, __y);} 1122}; 1123 1124template <class _Arg1, class _Arg2, class _Result> 1125_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1126pointer_to_binary_function<_Arg1,_Arg2,_Result> 1127ptr_fun(_Result (*__f)(_Arg1,_Arg2)) 1128 {return pointer_to_binary_function<_Arg1,_Arg2,_Result>(__f);} 1129 1130template<class _Sp, class _Tp> 1131class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 mem_fun_t 1132 : public unary_function<_Tp*, _Sp> 1133{ 1134 _Sp (_Tp::*__p_)(); 1135public: 1136 _LIBCPP_INLINE_VISIBILITY explicit mem_fun_t(_Sp (_Tp::*__p)()) 1137 : __p_(__p) {} 1138 _LIBCPP_INLINE_VISIBILITY _Sp operator()(_Tp* __p) const 1139 {return (__p->*__p_)();} 1140}; 1141 1142template<class _Sp, class _Tp, class _Ap> 1143class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 mem_fun1_t 1144 : public binary_function<_Tp*, _Ap, _Sp> 1145{ 1146 _Sp (_Tp::*__p_)(_Ap); 1147public: 1148 _LIBCPP_INLINE_VISIBILITY explicit mem_fun1_t(_Sp (_Tp::*__p)(_Ap)) 1149 : __p_(__p) {} 1150 _LIBCPP_INLINE_VISIBILITY _Sp operator()(_Tp* __p, _Ap __x) const 1151 {return (__p->*__p_)(__x);} 1152}; 1153 1154template<class _Sp, class _Tp> 1155_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1156mem_fun_t<_Sp,_Tp> 1157mem_fun(_Sp (_Tp::*__f)()) 1158 {return mem_fun_t<_Sp,_Tp>(__f);} 1159 1160template<class _Sp, class _Tp, class _Ap> 1161_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1162mem_fun1_t<_Sp,_Tp,_Ap> 1163mem_fun(_Sp (_Tp::*__f)(_Ap)) 1164 {return mem_fun1_t<_Sp,_Tp,_Ap>(__f);} 1165 1166template<class _Sp, class _Tp> 1167class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 mem_fun_ref_t 1168 : public unary_function<_Tp, _Sp> 1169{ 1170 _Sp (_Tp::*__p_)(); 1171public: 1172 _LIBCPP_INLINE_VISIBILITY explicit mem_fun_ref_t(_Sp (_Tp::*__p)()) 1173 : __p_(__p) {} 1174 _LIBCPP_INLINE_VISIBILITY _Sp operator()(_Tp& __p) const 1175 {return (__p.*__p_)();} 1176}; 1177 1178template<class _Sp, class _Tp, class _Ap> 1179class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 mem_fun1_ref_t 1180 : public binary_function<_Tp, _Ap, _Sp> 1181{ 1182 _Sp (_Tp::*__p_)(_Ap); 1183public: 1184 _LIBCPP_INLINE_VISIBILITY explicit mem_fun1_ref_t(_Sp (_Tp::*__p)(_Ap)) 1185 : __p_(__p) {} 1186 _LIBCPP_INLINE_VISIBILITY _Sp operator()(_Tp& __p, _Ap __x) const 1187 {return (__p.*__p_)(__x);} 1188}; 1189 1190template<class _Sp, class _Tp> 1191_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1192mem_fun_ref_t<_Sp,_Tp> 1193mem_fun_ref(_Sp (_Tp::*__f)()) 1194 {return mem_fun_ref_t<_Sp,_Tp>(__f);} 1195 1196template<class _Sp, class _Tp, class _Ap> 1197_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1198mem_fun1_ref_t<_Sp,_Tp,_Ap> 1199mem_fun_ref(_Sp (_Tp::*__f)(_Ap)) 1200 {return mem_fun1_ref_t<_Sp,_Tp,_Ap>(__f);} 1201 1202template <class _Sp, class _Tp> 1203class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 const_mem_fun_t 1204 : public unary_function<const _Tp*, _Sp> 1205{ 1206 _Sp (_Tp::*__p_)() const; 1207public: 1208 _LIBCPP_INLINE_VISIBILITY explicit const_mem_fun_t(_Sp (_Tp::*__p)() const) 1209 : __p_(__p) {} 1210 _LIBCPP_INLINE_VISIBILITY _Sp operator()(const _Tp* __p) const 1211 {return (__p->*__p_)();} 1212}; 1213 1214template <class _Sp, class _Tp, class _Ap> 1215class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 const_mem_fun1_t 1216 : public binary_function<const _Tp*, _Ap, _Sp> 1217{ 1218 _Sp (_Tp::*__p_)(_Ap) const; 1219public: 1220 _LIBCPP_INLINE_VISIBILITY explicit const_mem_fun1_t(_Sp (_Tp::*__p)(_Ap) const) 1221 : __p_(__p) {} 1222 _LIBCPP_INLINE_VISIBILITY _Sp operator()(const _Tp* __p, _Ap __x) const 1223 {return (__p->*__p_)(__x);} 1224}; 1225 1226template <class _Sp, class _Tp> 1227_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1228const_mem_fun_t<_Sp,_Tp> 1229mem_fun(_Sp (_Tp::*__f)() const) 1230 {return const_mem_fun_t<_Sp,_Tp>(__f);} 1231 1232template <class _Sp, class _Tp, class _Ap> 1233_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1234const_mem_fun1_t<_Sp,_Tp,_Ap> 1235mem_fun(_Sp (_Tp::*__f)(_Ap) const) 1236 {return const_mem_fun1_t<_Sp,_Tp,_Ap>(__f);} 1237 1238template <class _Sp, class _Tp> 1239class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 const_mem_fun_ref_t 1240 : public unary_function<_Tp, _Sp> 1241{ 1242 _Sp (_Tp::*__p_)() const; 1243public: 1244 _LIBCPP_INLINE_VISIBILITY explicit const_mem_fun_ref_t(_Sp (_Tp::*__p)() const) 1245 : __p_(__p) {} 1246 _LIBCPP_INLINE_VISIBILITY _Sp operator()(const _Tp& __p) const 1247 {return (__p.*__p_)();} 1248}; 1249 1250template <class _Sp, class _Tp, class _Ap> 1251class _LIBCPP_TEMPLATE_VIS _LIBCPP_DEPRECATED_IN_CXX11 const_mem_fun1_ref_t 1252 : public binary_function<_Tp, _Ap, _Sp> 1253{ 1254 _Sp (_Tp::*__p_)(_Ap) const; 1255public: 1256 _LIBCPP_INLINE_VISIBILITY explicit const_mem_fun1_ref_t(_Sp (_Tp::*__p)(_Ap) const) 1257 : __p_(__p) {} 1258 _LIBCPP_INLINE_VISIBILITY _Sp operator()(const _Tp& __p, _Ap __x) const 1259 {return (__p.*__p_)(__x);} 1260}; 1261 1262template <class _Sp, class _Tp> 1263_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1264const_mem_fun_ref_t<_Sp,_Tp> 1265mem_fun_ref(_Sp (_Tp::*__f)() const) 1266 {return const_mem_fun_ref_t<_Sp,_Tp>(__f);} 1267 1268template <class _Sp, class _Tp, class _Ap> 1269_LIBCPP_DEPRECATED_IN_CXX11 inline _LIBCPP_INLINE_VISIBILITY 1270const_mem_fun1_ref_t<_Sp,_Tp,_Ap> 1271mem_fun_ref(_Sp (_Tp::*__f)(_Ap) const) 1272 {return const_mem_fun1_ref_t<_Sp,_Tp,_Ap>(__f);} 1273#endif 1274 1275//////////////////////////////////////////////////////////////////////////////// 1276// MEMFUN 1277//============================================================================== 1278 1279template <class _Tp> 1280class __mem_fn 1281 : public __weak_result_type<_Tp> 1282{ 1283public: 1284 // types 1285 typedef _Tp type; 1286private: 1287 type __f_; 1288 1289public: 1290 _LIBCPP_INLINE_VISIBILITY __mem_fn(type __f) _NOEXCEPT : __f_(__f) {} 1291 1292#ifndef _LIBCPP_CXX03_LANG 1293 // invoke 1294 template <class... _ArgTypes> 1295 _LIBCPP_INLINE_VISIBILITY 1296 typename __invoke_return<type, _ArgTypes...>::type 1297 operator() (_ArgTypes&&... __args) const { 1298 return __invoke(__f_, _VSTD::forward<_ArgTypes>(__args)...); 1299 } 1300#else 1301 1302 template <class _A0> 1303 _LIBCPP_INLINE_VISIBILITY 1304 typename __invoke_return0<type, _A0>::type 1305 operator() (_A0& __a0) const { 1306 return __invoke(__f_, __a0); 1307 } 1308 1309 template <class _A0> 1310 _LIBCPP_INLINE_VISIBILITY 1311 typename __invoke_return0<type, _A0 const>::type 1312 operator() (_A0 const& __a0) const { 1313 return __invoke(__f_, __a0); 1314 } 1315 1316 template <class _A0, class _A1> 1317 _LIBCPP_INLINE_VISIBILITY 1318 typename __invoke_return1<type, _A0, _A1>::type 1319 operator() (_A0& __a0, _A1& __a1) const { 1320 return __invoke(__f_, __a0, __a1); 1321 } 1322 1323 template <class _A0, class _A1> 1324 _LIBCPP_INLINE_VISIBILITY 1325 typename __invoke_return1<type, _A0 const, _A1>::type 1326 operator() (_A0 const& __a0, _A1& __a1) const { 1327 return __invoke(__f_, __a0, __a1); 1328 } 1329 1330 template <class _A0, class _A1> 1331 _LIBCPP_INLINE_VISIBILITY 1332 typename __invoke_return1<type, _A0, _A1 const>::type 1333 operator() (_A0& __a0, _A1 const& __a1) const { 1334 return __invoke(__f_, __a0, __a1); 1335 } 1336 1337 template <class _A0, class _A1> 1338 _LIBCPP_INLINE_VISIBILITY 1339 typename __invoke_return1<type, _A0 const, _A1 const>::type 1340 operator() (_A0 const& __a0, _A1 const& __a1) const { 1341 return __invoke(__f_, __a0, __a1); 1342 } 1343 1344 template <class _A0, class _A1, class _A2> 1345 _LIBCPP_INLINE_VISIBILITY 1346 typename __invoke_return2<type, _A0, _A1, _A2>::type 1347 operator() (_A0& __a0, _A1& __a1, _A2& __a2) const { 1348 return __invoke(__f_, __a0, __a1, __a2); 1349 } 1350 1351 template <class _A0, class _A1, class _A2> 1352 _LIBCPP_INLINE_VISIBILITY 1353 typename __invoke_return2<type, _A0 const, _A1, _A2>::type 1354 operator() (_A0 const& __a0, _A1& __a1, _A2& __a2) const { 1355 return __invoke(__f_, __a0, __a1, __a2); 1356 } 1357 1358 template <class _A0, class _A1, class _A2> 1359 _LIBCPP_INLINE_VISIBILITY 1360 typename __invoke_return2<type, _A0, _A1 const, _A2>::type 1361 operator() (_A0& __a0, _A1 const& __a1, _A2& __a2) const { 1362 return __invoke(__f_, __a0, __a1, __a2); 1363 } 1364 1365 template <class _A0, class _A1, class _A2> 1366 _LIBCPP_INLINE_VISIBILITY 1367 typename __invoke_return2<type, _A0, _A1, _A2 const>::type 1368 operator() (_A0& __a0, _A1& __a1, _A2 const& __a2) const { 1369 return __invoke(__f_, __a0, __a1, __a2); 1370 } 1371 1372 template <class _A0, class _A1, class _A2> 1373 _LIBCPP_INLINE_VISIBILITY 1374 typename __invoke_return2<type, _A0 const, _A1 const, _A2>::type 1375 operator() (_A0 const& __a0, _A1 const& __a1, _A2& __a2) const { 1376 return __invoke(__f_, __a0, __a1, __a2); 1377 } 1378 1379 template <class _A0, class _A1, class _A2> 1380 _LIBCPP_INLINE_VISIBILITY 1381 typename __invoke_return2<type, _A0 const, _A1, _A2 const>::type 1382 operator() (_A0 const& __a0, _A1& __a1, _A2 const& __a2) const { 1383 return __invoke(__f_, __a0, __a1, __a2); 1384 } 1385 1386 template <class _A0, class _A1, class _A2> 1387 _LIBCPP_INLINE_VISIBILITY 1388 typename __invoke_return2<type, _A0, _A1 const, _A2 const>::type 1389 operator() (_A0& __a0, _A1 const& __a1, _A2 const& __a2) const { 1390 return __invoke(__f_, __a0, __a1, __a2); 1391 } 1392 1393 template <class _A0, class _A1, class _A2> 1394 _LIBCPP_INLINE_VISIBILITY 1395 typename __invoke_return2<type, _A0 const, _A1 const, _A2 const>::type 1396 operator() (_A0 const& __a0, _A1 const& __a1, _A2 const& __a2) const { 1397 return __invoke(__f_, __a0, __a1, __a2); 1398 } 1399#endif 1400}; 1401 1402template<class _Rp, class _Tp> 1403inline _LIBCPP_INLINE_VISIBILITY 1404__mem_fn<_Rp _Tp::*> 1405mem_fn(_Rp _Tp::* __pm) _NOEXCEPT 1406{ 1407 return __mem_fn<_Rp _Tp::*>(__pm); 1408} 1409 1410//////////////////////////////////////////////////////////////////////////////// 1411// FUNCTION 1412//============================================================================== 1413 1414// bad_function_call 1415 1416class _LIBCPP_EXCEPTION_ABI bad_function_call 1417 : public exception 1418{ 1419#ifdef _LIBCPP_ABI_BAD_FUNCTION_CALL_KEY_FUNCTION 1420public: 1421 virtual ~bad_function_call() _NOEXCEPT; 1422 1423 virtual const char* what() const _NOEXCEPT; 1424#endif 1425}; 1426 1427_LIBCPP_NORETURN inline _LIBCPP_INLINE_VISIBILITY 1428void __throw_bad_function_call() 1429{ 1430#ifndef _LIBCPP_NO_EXCEPTIONS 1431 throw bad_function_call(); 1432#else 1433 _VSTD::abort(); 1434#endif 1435} 1436 1437template<class _Fp> class _LIBCPP_TEMPLATE_VIS function; // undefined 1438 1439namespace __function 1440{ 1441 1442template<class _Rp> 1443struct __maybe_derive_from_unary_function 1444{ 1445}; 1446 1447template<class _Rp, class _A1> 1448struct __maybe_derive_from_unary_function<_Rp(_A1)> 1449 : public unary_function<_A1, _Rp> 1450{ 1451}; 1452 1453template<class _Rp> 1454struct __maybe_derive_from_binary_function 1455{ 1456}; 1457 1458template<class _Rp, class _A1, class _A2> 1459struct __maybe_derive_from_binary_function<_Rp(_A1, _A2)> 1460 : public binary_function<_A1, _A2, _Rp> 1461{ 1462}; 1463 1464template <class _Fp> 1465_LIBCPP_INLINE_VISIBILITY 1466bool __not_null(_Fp const&) { return true; } 1467 1468template <class _Fp> 1469_LIBCPP_INLINE_VISIBILITY 1470bool __not_null(_Fp* __ptr) { return __ptr; } 1471 1472template <class _Ret, class _Class> 1473_LIBCPP_INLINE_VISIBILITY 1474bool __not_null(_Ret _Class::*__ptr) { return __ptr; } 1475 1476template <class _Fp> 1477_LIBCPP_INLINE_VISIBILITY 1478bool __not_null(function<_Fp> const& __f) { return !!__f; } 1479 1480} // namespace __function 1481 1482#ifndef _LIBCPP_CXX03_LANG 1483 1484namespace __function { 1485 1486// __alloc_func holds a functor and an allocator. 1487 1488template <class _Fp, class _Ap, class _FB> class __alloc_func; 1489template <class _Fp, class _FB> 1490class __default_alloc_func; 1491 1492template <class _Fp, class _Ap, class _Rp, class... _ArgTypes> 1493class __alloc_func<_Fp, _Ap, _Rp(_ArgTypes...)> 1494{ 1495 __compressed_pair<_Fp, _Ap> __f_; 1496 1497 public: 1498 typedef _LIBCPP_NODEBUG_TYPE _Fp _Target; 1499 typedef _LIBCPP_NODEBUG_TYPE _Ap _Alloc; 1500 1501 _LIBCPP_INLINE_VISIBILITY 1502 const _Target& __target() const { return __f_.first(); } 1503 1504 // WIN32 APIs may define __allocator, so use __get_allocator instead. 1505 _LIBCPP_INLINE_VISIBILITY 1506 const _Alloc& __get_allocator() const { return __f_.second(); } 1507 1508 _LIBCPP_INLINE_VISIBILITY 1509 explicit __alloc_func(_Target&& __f) 1510 : __f_(piecewise_construct, _VSTD::forward_as_tuple(_VSTD::move(__f)), 1511 _VSTD::forward_as_tuple()) 1512 { 1513 } 1514 1515 _LIBCPP_INLINE_VISIBILITY 1516 explicit __alloc_func(const _Target& __f, const _Alloc& __a) 1517 : __f_(piecewise_construct, _VSTD::forward_as_tuple(__f), 1518 _VSTD::forward_as_tuple(__a)) 1519 { 1520 } 1521 1522 _LIBCPP_INLINE_VISIBILITY 1523 explicit __alloc_func(const _Target& __f, _Alloc&& __a) 1524 : __f_(piecewise_construct, _VSTD::forward_as_tuple(__f), 1525 _VSTD::forward_as_tuple(_VSTD::move(__a))) 1526 { 1527 } 1528 1529 _LIBCPP_INLINE_VISIBILITY 1530 explicit __alloc_func(_Target&& __f, _Alloc&& __a) 1531 : __f_(piecewise_construct, _VSTD::forward_as_tuple(_VSTD::move(__f)), 1532 _VSTD::forward_as_tuple(_VSTD::move(__a))) 1533 { 1534 } 1535 1536 _LIBCPP_INLINE_VISIBILITY 1537 _Rp operator()(_ArgTypes&&... __arg) 1538 { 1539 typedef __invoke_void_return_wrapper<_Rp> _Invoker; 1540 return _Invoker::__call(__f_.first(), 1541 _VSTD::forward<_ArgTypes>(__arg)...); 1542 } 1543 1544 _LIBCPP_INLINE_VISIBILITY 1545 __alloc_func* __clone() const 1546 { 1547 typedef allocator_traits<_Alloc> __alloc_traits; 1548 typedef 1549 typename __rebind_alloc_helper<__alloc_traits, __alloc_func>::type 1550 _AA; 1551 _AA __a(__f_.second()); 1552 typedef __allocator_destructor<_AA> _Dp; 1553 unique_ptr<__alloc_func, _Dp> __hold(__a.allocate(1), _Dp(__a, 1)); 1554 ::new ((void*)__hold.get()) __alloc_func(__f_.first(), _Alloc(__a)); 1555 return __hold.release(); 1556 } 1557 1558 _LIBCPP_INLINE_VISIBILITY 1559 void destroy() _NOEXCEPT { __f_.~__compressed_pair<_Target, _Alloc>(); } 1560 1561 static void __destroy_and_delete(__alloc_func* __f) { 1562 typedef allocator_traits<_Alloc> __alloc_traits; 1563 typedef typename __rebind_alloc_helper<__alloc_traits, __alloc_func>::type 1564 _FunAlloc; 1565 _FunAlloc __a(__f->__get_allocator()); 1566 __f->destroy(); 1567 __a.deallocate(__f, 1); 1568 } 1569}; 1570 1571template <class _Fp, class _Rp, class... _ArgTypes> 1572class __default_alloc_func<_Fp, _Rp(_ArgTypes...)> { 1573 _Fp __f_; 1574 1575public: 1576 typedef _LIBCPP_NODEBUG_TYPE _Fp _Target; 1577 1578 _LIBCPP_INLINE_VISIBILITY 1579 const _Target& __target() const { return __f_; } 1580 1581 _LIBCPP_INLINE_VISIBILITY 1582 explicit __default_alloc_func(_Target&& __f) : __f_(std::move(__f)) {} 1583 1584 _LIBCPP_INLINE_VISIBILITY 1585 explicit __default_alloc_func(const _Target& __f) : __f_(__f) {} 1586 1587 _LIBCPP_INLINE_VISIBILITY 1588 _Rp operator()(_ArgTypes&&... __arg) { 1589 typedef __invoke_void_return_wrapper<_Rp> _Invoker; 1590 return _Invoker::__call(__f_, _VSTD::forward<_ArgTypes>(__arg)...); 1591 } 1592 1593 _LIBCPP_INLINE_VISIBILITY 1594 __default_alloc_func* __clone() const { 1595 __builtin_new_allocator::__holder_t __hold = 1596 __builtin_new_allocator::__allocate_type<__default_alloc_func>(1); 1597 __default_alloc_func* __res = 1598 ::new (__hold.get()) __default_alloc_func(__f_); 1599 (void)__hold.release(); 1600 return __res; 1601 } 1602 1603 _LIBCPP_INLINE_VISIBILITY 1604 void destroy() _NOEXCEPT { __f_.~_Target(); } 1605 1606 static void __destroy_and_delete(__default_alloc_func* __f) { 1607 __f->destroy(); 1608 __builtin_new_allocator::__deallocate_type<__default_alloc_func>(__f, 1); 1609 } 1610}; 1611 1612// __base provides an abstract interface for copyable functors. 1613 1614template<class _Fp> class __base; 1615 1616template<class _Rp, class ..._ArgTypes> 1617class __base<_Rp(_ArgTypes...)> 1618{ 1619 __base(const __base&); 1620 __base& operator=(const __base&); 1621public: 1622 _LIBCPP_INLINE_VISIBILITY __base() {} 1623 _LIBCPP_INLINE_VISIBILITY virtual ~__base() {} 1624 virtual __base* __clone() const = 0; 1625 virtual void __clone(__base*) const = 0; 1626 virtual void destroy() _NOEXCEPT = 0; 1627 virtual void destroy_deallocate() _NOEXCEPT = 0; 1628 virtual _Rp operator()(_ArgTypes&& ...) = 0; 1629#ifndef _LIBCPP_NO_RTTI 1630 virtual const void* target(const type_info&) const _NOEXCEPT = 0; 1631 virtual const std::type_info& target_type() const _NOEXCEPT = 0; 1632#endif // _LIBCPP_NO_RTTI 1633}; 1634 1635// __func implements __base for a given functor type. 1636 1637template<class _FD, class _Alloc, class _FB> class __func; 1638 1639template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1640class __func<_Fp, _Alloc, _Rp(_ArgTypes...)> 1641 : public __base<_Rp(_ArgTypes...)> 1642{ 1643 __alloc_func<_Fp, _Alloc, _Rp(_ArgTypes...)> __f_; 1644public: 1645 _LIBCPP_INLINE_VISIBILITY 1646 explicit __func(_Fp&& __f) 1647 : __f_(_VSTD::move(__f)) {} 1648 1649 _LIBCPP_INLINE_VISIBILITY 1650 explicit __func(const _Fp& __f, const _Alloc& __a) 1651 : __f_(__f, __a) {} 1652 1653 _LIBCPP_INLINE_VISIBILITY 1654 explicit __func(const _Fp& __f, _Alloc&& __a) 1655 : __f_(__f, _VSTD::move(__a)) {} 1656 1657 _LIBCPP_INLINE_VISIBILITY 1658 explicit __func(_Fp&& __f, _Alloc&& __a) 1659 : __f_(_VSTD::move(__f), _VSTD::move(__a)) {} 1660 1661 virtual __base<_Rp(_ArgTypes...)>* __clone() const; 1662 virtual void __clone(__base<_Rp(_ArgTypes...)>*) const; 1663 virtual void destroy() _NOEXCEPT; 1664 virtual void destroy_deallocate() _NOEXCEPT; 1665 virtual _Rp operator()(_ArgTypes&&... __arg); 1666#ifndef _LIBCPP_NO_RTTI 1667 virtual const void* target(const type_info&) const _NOEXCEPT; 1668 virtual const std::type_info& target_type() const _NOEXCEPT; 1669#endif // _LIBCPP_NO_RTTI 1670}; 1671 1672template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1673__base<_Rp(_ArgTypes...)>* 1674__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::__clone() const 1675{ 1676 typedef allocator_traits<_Alloc> __alloc_traits; 1677 typedef typename __rebind_alloc_helper<__alloc_traits, __func>::type _Ap; 1678 _Ap __a(__f_.__get_allocator()); 1679 typedef __allocator_destructor<_Ap> _Dp; 1680 unique_ptr<__func, _Dp> __hold(__a.allocate(1), _Dp(__a, 1)); 1681 ::new ((void*)__hold.get()) __func(__f_.__target(), _Alloc(__a)); 1682 return __hold.release(); 1683} 1684 1685template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1686void 1687__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::__clone(__base<_Rp(_ArgTypes...)>* __p) const 1688{ 1689 ::new (__p) __func(__f_.__target(), __f_.__get_allocator()); 1690} 1691 1692template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1693void 1694__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy() _NOEXCEPT 1695{ 1696 __f_.destroy(); 1697} 1698 1699template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1700void 1701__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::destroy_deallocate() _NOEXCEPT 1702{ 1703 typedef allocator_traits<_Alloc> __alloc_traits; 1704 typedef typename __rebind_alloc_helper<__alloc_traits, __func>::type _Ap; 1705 _Ap __a(__f_.__get_allocator()); 1706 __f_.destroy(); 1707 __a.deallocate(this, 1); 1708} 1709 1710template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1711_Rp 1712__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::operator()(_ArgTypes&& ... __arg) 1713{ 1714 return __f_(_VSTD::forward<_ArgTypes>(__arg)...); 1715} 1716 1717#ifndef _LIBCPP_NO_RTTI 1718 1719template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1720const void* 1721__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::target(const type_info& __ti) const _NOEXCEPT 1722{ 1723 if (__ti == typeid(_Fp)) 1724 return &__f_.__target(); 1725 return (const void*)0; 1726} 1727 1728template<class _Fp, class _Alloc, class _Rp, class ..._ArgTypes> 1729const std::type_info& 1730__func<_Fp, _Alloc, _Rp(_ArgTypes...)>::target_type() const _NOEXCEPT 1731{ 1732 return typeid(_Fp); 1733} 1734 1735#endif // _LIBCPP_NO_RTTI 1736 1737// __value_func creates a value-type from a __func. 1738 1739template <class _Fp> class __value_func; 1740 1741template <class _Rp, class... _ArgTypes> class __value_func<_Rp(_ArgTypes...)> 1742{ 1743 typename aligned_storage<3 * sizeof(void*)>::type __buf_; 1744 1745 typedef __base<_Rp(_ArgTypes...)> __func; 1746 __func* __f_; 1747 1748 _LIBCPP_NO_CFI static __func* __as_base(void* p) 1749 { 1750 return reinterpret_cast<__func*>(p); 1751 } 1752 1753 public: 1754 _LIBCPP_INLINE_VISIBILITY 1755 __value_func() _NOEXCEPT : __f_(0) {} 1756 1757 template <class _Fp, class _Alloc> 1758 _LIBCPP_INLINE_VISIBILITY __value_func(_Fp&& __f, const _Alloc& __a) 1759 : __f_(0) 1760 { 1761 typedef allocator_traits<_Alloc> __alloc_traits; 1762 typedef __function::__func<_Fp, _Alloc, _Rp(_ArgTypes...)> _Fun; 1763 typedef typename __rebind_alloc_helper<__alloc_traits, _Fun>::type 1764 _FunAlloc; 1765 1766 if (__function::__not_null(__f)) 1767 { 1768 _FunAlloc __af(__a); 1769 if (sizeof(_Fun) <= sizeof(__buf_) && 1770 is_nothrow_copy_constructible<_Fp>::value && 1771 is_nothrow_copy_constructible<_FunAlloc>::value) 1772 { 1773 __f_ = 1774 ::new ((void*)&__buf_) _Fun(_VSTD::move(__f), _Alloc(__af)); 1775 } 1776 else 1777 { 1778 typedef __allocator_destructor<_FunAlloc> _Dp; 1779 unique_ptr<__func, _Dp> __hold(__af.allocate(1), _Dp(__af, 1)); 1780 ::new ((void*)__hold.get()) _Fun(_VSTD::move(__f), _Alloc(__a)); 1781 __f_ = __hold.release(); 1782 } 1783 } 1784 } 1785 1786 template <class _Fp, 1787 class = typename enable_if<!is_same<typename decay<_Fp>::type, __value_func>::value>::type> 1788 _LIBCPP_INLINE_VISIBILITY explicit __value_func(_Fp&& __f) 1789 : __value_func(std::forward<_Fp>(__f), allocator<_Fp>()) {} 1790 1791 _LIBCPP_INLINE_VISIBILITY 1792 __value_func(const __value_func& __f) 1793 { 1794 if (__f.__f_ == 0) 1795 __f_ = 0; 1796 else if ((void*)__f.__f_ == &__f.__buf_) 1797 { 1798 __f_ = __as_base(&__buf_); 1799 __f.__f_->__clone(__f_); 1800 } 1801 else 1802 __f_ = __f.__f_->__clone(); 1803 } 1804 1805 _LIBCPP_INLINE_VISIBILITY 1806 __value_func(__value_func&& __f) _NOEXCEPT 1807 { 1808 if (__f.__f_ == 0) 1809 __f_ = 0; 1810 else if ((void*)__f.__f_ == &__f.__buf_) 1811 { 1812 __f_ = __as_base(&__buf_); 1813 __f.__f_->__clone(__f_); 1814 } 1815 else 1816 { 1817 __f_ = __f.__f_; 1818 __f.__f_ = 0; 1819 } 1820 } 1821 1822 _LIBCPP_INLINE_VISIBILITY 1823 ~__value_func() 1824 { 1825 if ((void*)__f_ == &__buf_) 1826 __f_->destroy(); 1827 else if (__f_) 1828 __f_->destroy_deallocate(); 1829 } 1830 1831 _LIBCPP_INLINE_VISIBILITY 1832 __value_func& operator=(__value_func&& __f) 1833 { 1834 *this = nullptr; 1835 if (__f.__f_ == 0) 1836 __f_ = 0; 1837 else if ((void*)__f.__f_ == &__f.__buf_) 1838 { 1839 __f_ = __as_base(&__buf_); 1840 __f.__f_->__clone(__f_); 1841 } 1842 else 1843 { 1844 __f_ = __f.__f_; 1845 __f.__f_ = 0; 1846 } 1847 return *this; 1848 } 1849 1850 _LIBCPP_INLINE_VISIBILITY 1851 __value_func& operator=(nullptr_t) 1852 { 1853 __func* __f = __f_; 1854 __f_ = 0; 1855 if ((void*)__f == &__buf_) 1856 __f->destroy(); 1857 else if (__f) 1858 __f->destroy_deallocate(); 1859 return *this; 1860 } 1861 1862 _LIBCPP_INLINE_VISIBILITY 1863 _Rp operator()(_ArgTypes&&... __args) const 1864 { 1865 if (__f_ == 0) 1866 __throw_bad_function_call(); 1867 return (*__f_)(_VSTD::forward<_ArgTypes>(__args)...); 1868 } 1869 1870 _LIBCPP_INLINE_VISIBILITY 1871 void swap(__value_func& __f) _NOEXCEPT 1872 { 1873 if (&__f == this) 1874 return; 1875 if ((void*)__f_ == &__buf_ && (void*)__f.__f_ == &__f.__buf_) 1876 { 1877 typename aligned_storage<sizeof(__buf_)>::type __tempbuf; 1878 __func* __t = __as_base(&__tempbuf); 1879 __f_->__clone(__t); 1880 __f_->destroy(); 1881 __f_ = 0; 1882 __f.__f_->__clone(__as_base(&__buf_)); 1883 __f.__f_->destroy(); 1884 __f.__f_ = 0; 1885 __f_ = __as_base(&__buf_); 1886 __t->__clone(__as_base(&__f.__buf_)); 1887 __t->destroy(); 1888 __f.__f_ = __as_base(&__f.__buf_); 1889 } 1890 else if ((void*)__f_ == &__buf_) 1891 { 1892 __f_->__clone(__as_base(&__f.__buf_)); 1893 __f_->destroy(); 1894 __f_ = __f.__f_; 1895 __f.__f_ = __as_base(&__f.__buf_); 1896 } 1897 else if ((void*)__f.__f_ == &__f.__buf_) 1898 { 1899 __f.__f_->__clone(__as_base(&__buf_)); 1900 __f.__f_->destroy(); 1901 __f.__f_ = __f_; 1902 __f_ = __as_base(&__buf_); 1903 } 1904 else 1905 _VSTD::swap(__f_, __f.__f_); 1906 } 1907 1908 _LIBCPP_INLINE_VISIBILITY 1909 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { return __f_ != 0; } 1910 1911#ifndef _LIBCPP_NO_RTTI 1912 _LIBCPP_INLINE_VISIBILITY 1913 const std::type_info& target_type() const _NOEXCEPT 1914 { 1915 if (__f_ == 0) 1916 return typeid(void); 1917 return __f_->target_type(); 1918 } 1919 1920 template <typename _Tp> 1921 _LIBCPP_INLINE_VISIBILITY const _Tp* target() const _NOEXCEPT 1922 { 1923 if (__f_ == 0) 1924 return 0; 1925 return (const _Tp*)__f_->target(typeid(_Tp)); 1926 } 1927#endif // _LIBCPP_NO_RTTI 1928}; 1929 1930// Storage for a functor object, to be used with __policy to manage copy and 1931// destruction. 1932union __policy_storage 1933{ 1934 mutable char __small[sizeof(void*) * 2]; 1935 void* __large; 1936}; 1937 1938// True if _Fun can safely be held in __policy_storage.__small. 1939template <typename _Fun> 1940struct __use_small_storage 1941 : public _VSTD::integral_constant< 1942 bool, sizeof(_Fun) <= sizeof(__policy_storage) && 1943 _LIBCPP_ALIGNOF(_Fun) <= _LIBCPP_ALIGNOF(__policy_storage) && 1944 _VSTD::is_trivially_copy_constructible<_Fun>::value && 1945 _VSTD::is_trivially_destructible<_Fun>::value> {}; 1946 1947// Policy contains information about how to copy, destroy, and move the 1948// underlying functor. You can think of it as a vtable of sorts. 1949struct __policy 1950{ 1951 // Used to copy or destroy __large values. null for trivial objects. 1952 void* (*const __clone)(const void*); 1953 void (*const __destroy)(void*); 1954 1955 // True if this is the null policy (no value). 1956 const bool __is_null; 1957 1958 // The target type. May be null if RTTI is disabled. 1959 const std::type_info* const __type_info; 1960 1961 // Returns a pointer to a static policy object suitable for the functor 1962 // type. 1963 template <typename _Fun> 1964 _LIBCPP_INLINE_VISIBILITY static const __policy* __create() 1965 { 1966 return __choose_policy<_Fun>(__use_small_storage<_Fun>()); 1967 } 1968 1969 _LIBCPP_INLINE_VISIBILITY 1970 static const __policy* __create_empty() 1971 { 1972 static const _LIBCPP_CONSTEXPR __policy __policy_ = {nullptr, nullptr, 1973 true, 1974#ifndef _LIBCPP_NO_RTTI 1975 &typeid(void) 1976#else 1977 nullptr 1978#endif 1979 }; 1980 return &__policy_; 1981 } 1982 1983 private: 1984 template <typename _Fun> static void* __large_clone(const void* __s) 1985 { 1986 const _Fun* __f = static_cast<const _Fun*>(__s); 1987 return __f->__clone(); 1988 } 1989 1990 template <typename _Fun> 1991 static void __large_destroy(void* __s) { 1992 _Fun::__destroy_and_delete(static_cast<_Fun*>(__s)); 1993 } 1994 1995 template <typename _Fun> 1996 _LIBCPP_INLINE_VISIBILITY static const __policy* 1997 __choose_policy(/* is_small = */ false_type) { 1998 static const _LIBCPP_CONSTEXPR __policy __policy_ = { 1999 &__large_clone<_Fun>, &__large_destroy<_Fun>, false, 2000#ifndef _LIBCPP_NO_RTTI 2001 &typeid(typename _Fun::_Target) 2002#else 2003 nullptr 2004#endif 2005 }; 2006 return &__policy_; 2007 } 2008 2009 template <typename _Fun> 2010 _LIBCPP_INLINE_VISIBILITY static const __policy* 2011 __choose_policy(/* is_small = */ true_type) 2012 { 2013 static const _LIBCPP_CONSTEXPR __policy __policy_ = { 2014 nullptr, nullptr, false, 2015#ifndef _LIBCPP_NO_RTTI 2016 &typeid(typename _Fun::_Target) 2017#else 2018 nullptr 2019#endif 2020 }; 2021 return &__policy_; 2022 } 2023}; 2024 2025// Used to choose between perfect forwarding or pass-by-value. Pass-by-value is 2026// faster for types that can be passed in registers. 2027template <typename _Tp> 2028using __fast_forward = 2029 typename _VSTD::conditional<_VSTD::is_scalar<_Tp>::value, _Tp, _Tp&&>::type; 2030 2031// __policy_invoker calls an instance of __alloc_func held in __policy_storage. 2032 2033template <class _Fp> struct __policy_invoker; 2034 2035template <class _Rp, class... _ArgTypes> 2036struct __policy_invoker<_Rp(_ArgTypes...)> 2037{ 2038 typedef _Rp (*__Call)(const __policy_storage*, 2039 __fast_forward<_ArgTypes>...); 2040 2041 __Call __call_; 2042 2043 // Creates an invoker that throws bad_function_call. 2044 _LIBCPP_INLINE_VISIBILITY 2045 __policy_invoker() : __call_(&__call_empty) {} 2046 2047 // Creates an invoker that calls the given instance of __func. 2048 template <typename _Fun> 2049 _LIBCPP_INLINE_VISIBILITY static __policy_invoker __create() 2050 { 2051 return __policy_invoker(&__call_impl<_Fun>); 2052 } 2053 2054 private: 2055 _LIBCPP_INLINE_VISIBILITY 2056 explicit __policy_invoker(__Call __c) : __call_(__c) {} 2057 2058 static _Rp __call_empty(const __policy_storage*, 2059 __fast_forward<_ArgTypes>...) 2060 { 2061 __throw_bad_function_call(); 2062 } 2063 2064 template <typename _Fun> 2065 static _Rp __call_impl(const __policy_storage* __buf, 2066 __fast_forward<_ArgTypes>... __args) 2067 { 2068 _Fun* __f = reinterpret_cast<_Fun*>(__use_small_storage<_Fun>::value 2069 ? &__buf->__small 2070 : __buf->__large); 2071 return (*__f)(_VSTD::forward<_ArgTypes>(__args)...); 2072 } 2073}; 2074 2075// __policy_func uses a __policy and __policy_invoker to create a type-erased, 2076// copyable functor. 2077 2078template <class _Fp> class __policy_func; 2079 2080template <class _Rp, class... _ArgTypes> class __policy_func<_Rp(_ArgTypes...)> 2081{ 2082 // Inline storage for small objects. 2083 __policy_storage __buf_; 2084 2085 // Calls the value stored in __buf_. This could technically be part of 2086 // policy, but storing it here eliminates a level of indirection inside 2087 // operator(). 2088 typedef __function::__policy_invoker<_Rp(_ArgTypes...)> __invoker; 2089 __invoker __invoker_; 2090 2091 // The policy that describes how to move / copy / destroy __buf_. Never 2092 // null, even if the function is empty. 2093 const __policy* __policy_; 2094 2095 public: 2096 _LIBCPP_INLINE_VISIBILITY 2097 __policy_func() : __policy_(__policy::__create_empty()) {} 2098 2099 template <class _Fp, class _Alloc> 2100 _LIBCPP_INLINE_VISIBILITY __policy_func(_Fp&& __f, const _Alloc& __a) 2101 : __policy_(__policy::__create_empty()) 2102 { 2103 typedef __alloc_func<_Fp, _Alloc, _Rp(_ArgTypes...)> _Fun; 2104 typedef allocator_traits<_Alloc> __alloc_traits; 2105 typedef typename __rebind_alloc_helper<__alloc_traits, _Fun>::type 2106 _FunAlloc; 2107 2108 if (__function::__not_null(__f)) 2109 { 2110 __invoker_ = __invoker::template __create<_Fun>(); 2111 __policy_ = __policy::__create<_Fun>(); 2112 2113 _FunAlloc __af(__a); 2114 if (__use_small_storage<_Fun>()) 2115 { 2116 ::new ((void*)&__buf_.__small) 2117 _Fun(_VSTD::move(__f), _Alloc(__af)); 2118 } 2119 else 2120 { 2121 typedef __allocator_destructor<_FunAlloc> _Dp; 2122 unique_ptr<_Fun, _Dp> __hold(__af.allocate(1), _Dp(__af, 1)); 2123 ::new ((void*)__hold.get()) 2124 _Fun(_VSTD::move(__f), _Alloc(__af)); 2125 __buf_.__large = __hold.release(); 2126 } 2127 } 2128 } 2129 2130 template <class _Fp, class = typename enable_if<!is_same<typename decay<_Fp>::type, __policy_func>::value>::type> 2131 _LIBCPP_INLINE_VISIBILITY explicit __policy_func(_Fp&& __f) 2132 : __policy_(__policy::__create_empty()) { 2133 typedef __default_alloc_func<_Fp, _Rp(_ArgTypes...)> _Fun; 2134 2135 if (__function::__not_null(__f)) { 2136 __invoker_ = __invoker::template __create<_Fun>(); 2137 __policy_ = __policy::__create<_Fun>(); 2138 if (__use_small_storage<_Fun>()) { 2139 ::new ((void*)&__buf_.__small) _Fun(_VSTD::move(__f)); 2140 } else { 2141 __builtin_new_allocator::__holder_t __hold = 2142 __builtin_new_allocator::__allocate_type<_Fun>(1); 2143 __buf_.__large = ::new (__hold.get()) _Fun(_VSTD::move(__f)); 2144 (void)__hold.release(); 2145 } 2146 } 2147 } 2148 2149 _LIBCPP_INLINE_VISIBILITY 2150 __policy_func(const __policy_func& __f) 2151 : __buf_(__f.__buf_), __invoker_(__f.__invoker_), 2152 __policy_(__f.__policy_) 2153 { 2154 if (__policy_->__clone) 2155 __buf_.__large = __policy_->__clone(__f.__buf_.__large); 2156 } 2157 2158 _LIBCPP_INLINE_VISIBILITY 2159 __policy_func(__policy_func&& __f) 2160 : __buf_(__f.__buf_), __invoker_(__f.__invoker_), 2161 __policy_(__f.__policy_) 2162 { 2163 if (__policy_->__destroy) 2164 { 2165 __f.__policy_ = __policy::__create_empty(); 2166 __f.__invoker_ = __invoker(); 2167 } 2168 } 2169 2170 _LIBCPP_INLINE_VISIBILITY 2171 ~__policy_func() 2172 { 2173 if (__policy_->__destroy) 2174 __policy_->__destroy(__buf_.__large); 2175 } 2176 2177 _LIBCPP_INLINE_VISIBILITY 2178 __policy_func& operator=(__policy_func&& __f) 2179 { 2180 *this = nullptr; 2181 __buf_ = __f.__buf_; 2182 __invoker_ = __f.__invoker_; 2183 __policy_ = __f.__policy_; 2184 __f.__policy_ = __policy::__create_empty(); 2185 __f.__invoker_ = __invoker(); 2186 return *this; 2187 } 2188 2189 _LIBCPP_INLINE_VISIBILITY 2190 __policy_func& operator=(nullptr_t) 2191 { 2192 const __policy* __p = __policy_; 2193 __policy_ = __policy::__create_empty(); 2194 __invoker_ = __invoker(); 2195 if (__p->__destroy) 2196 __p->__destroy(__buf_.__large); 2197 return *this; 2198 } 2199 2200 _LIBCPP_INLINE_VISIBILITY 2201 _Rp operator()(_ArgTypes&&... __args) const 2202 { 2203 return __invoker_.__call_(_VSTD::addressof(__buf_), 2204 _VSTD::forward<_ArgTypes>(__args)...); 2205 } 2206 2207 _LIBCPP_INLINE_VISIBILITY 2208 void swap(__policy_func& __f) 2209 { 2210 _VSTD::swap(__invoker_, __f.__invoker_); 2211 _VSTD::swap(__policy_, __f.__policy_); 2212 _VSTD::swap(__buf_, __f.__buf_); 2213 } 2214 2215 _LIBCPP_INLINE_VISIBILITY 2216 explicit operator bool() const _NOEXCEPT 2217 { 2218 return !__policy_->__is_null; 2219 } 2220 2221#ifndef _LIBCPP_NO_RTTI 2222 _LIBCPP_INLINE_VISIBILITY 2223 const std::type_info& target_type() const _NOEXCEPT 2224 { 2225 return *__policy_->__type_info; 2226 } 2227 2228 template <typename _Tp> 2229 _LIBCPP_INLINE_VISIBILITY const _Tp* target() const _NOEXCEPT 2230 { 2231 if (__policy_->__is_null || typeid(_Tp) != *__policy_->__type_info) 2232 return nullptr; 2233 if (__policy_->__clone) // Out of line storage. 2234 return reinterpret_cast<const _Tp*>(__buf_.__large); 2235 else 2236 return reinterpret_cast<const _Tp*>(&__buf_.__small); 2237 } 2238#endif // _LIBCPP_NO_RTTI 2239}; 2240 2241} // __function 2242 2243template<class _Rp, class ..._ArgTypes> 2244class _LIBCPP_TEMPLATE_VIS function<_Rp(_ArgTypes...)> 2245 : public __function::__maybe_derive_from_unary_function<_Rp(_ArgTypes...)>, 2246 public __function::__maybe_derive_from_binary_function<_Rp(_ArgTypes...)> 2247{ 2248#ifndef _LIBCPP_ABI_OPTIMIZED_FUNCTION 2249 typedef __function::__value_func<_Rp(_ArgTypes...)> __func; 2250#else 2251 typedef __function::__policy_func<_Rp(_ArgTypes...)> __func; 2252#endif 2253 2254 __func __f_; 2255 2256 template <class _Fp, bool = _And< 2257 _IsNotSame<__uncvref_t<_Fp>, function>, 2258 __invokable<_Fp&, _ArgTypes...> 2259 >::value> 2260 struct __callable; 2261 template <class _Fp> 2262 struct __callable<_Fp, true> 2263 { 2264 static const bool value = is_same<void, _Rp>::value || 2265 is_convertible<typename __invoke_of<_Fp&, _ArgTypes...>::type, 2266 _Rp>::value; 2267 }; 2268 template <class _Fp> 2269 struct __callable<_Fp, false> 2270 { 2271 static const bool value = false; 2272 }; 2273 2274 template <class _Fp> 2275 using _EnableIfCallable = typename enable_if<__callable<_Fp>::value>::type; 2276public: 2277 typedef _Rp result_type; 2278 2279 // construct/copy/destroy: 2280 _LIBCPP_INLINE_VISIBILITY 2281 function() _NOEXCEPT { } 2282 _LIBCPP_INLINE_VISIBILITY 2283 function(nullptr_t) _NOEXCEPT {} 2284 function(const function&); 2285 function(function&&) _NOEXCEPT; 2286 template<class _Fp, class = _EnableIfCallable<_Fp>> 2287 function(_Fp); 2288 2289#if _LIBCPP_STD_VER <= 14 2290 template<class _Alloc> 2291 _LIBCPP_INLINE_VISIBILITY 2292 function(allocator_arg_t, const _Alloc&) _NOEXCEPT {} 2293 template<class _Alloc> 2294 _LIBCPP_INLINE_VISIBILITY 2295 function(allocator_arg_t, const _Alloc&, nullptr_t) _NOEXCEPT {} 2296 template<class _Alloc> 2297 function(allocator_arg_t, const _Alloc&, const function&); 2298 template<class _Alloc> 2299 function(allocator_arg_t, const _Alloc&, function&&); 2300 template<class _Fp, class _Alloc, class = _EnableIfCallable<_Fp>> 2301 function(allocator_arg_t, const _Alloc& __a, _Fp __f); 2302#endif 2303 2304 function& operator=(const function&); 2305 function& operator=(function&&) _NOEXCEPT; 2306 function& operator=(nullptr_t) _NOEXCEPT; 2307 template<class _Fp, class = _EnableIfCallable<_Fp>> 2308 function& operator=(_Fp&&); 2309 2310 ~function(); 2311 2312 // function modifiers: 2313 void swap(function&) _NOEXCEPT; 2314 2315#if _LIBCPP_STD_VER <= 14 2316 template<class _Fp, class _Alloc> 2317 _LIBCPP_INLINE_VISIBILITY 2318 void assign(_Fp&& __f, const _Alloc& __a) 2319 {function(allocator_arg, __a, _VSTD::forward<_Fp>(__f)).swap(*this);} 2320#endif 2321 2322 // function capacity: 2323 _LIBCPP_INLINE_VISIBILITY 2324 _LIBCPP_EXPLICIT operator bool() const _NOEXCEPT { 2325 return static_cast<bool>(__f_); 2326 } 2327 2328 // deleted overloads close possible hole in the type system 2329 template<class _R2, class... _ArgTypes2> 2330 bool operator==(const function<_R2(_ArgTypes2...)>&) const = delete; 2331 template<class _R2, class... _ArgTypes2> 2332 bool operator!=(const function<_R2(_ArgTypes2...)>&) const = delete; 2333public: 2334 // function invocation: 2335 _Rp operator()(_ArgTypes...) const; 2336 2337#ifndef _LIBCPP_NO_RTTI 2338 // function target access: 2339 const std::type_info& target_type() const _NOEXCEPT; 2340 template <typename _Tp> _Tp* target() _NOEXCEPT; 2341 template <typename _Tp> const _Tp* target() const _NOEXCEPT; 2342#endif // _LIBCPP_NO_RTTI 2343}; 2344 2345#ifndef _LIBCPP_HAS_NO_DEDUCTION_GUIDES 2346template<class _Rp, class ..._Ap> 2347function(_Rp(*)(_Ap...)) -> function<_Rp(_Ap...)>; 2348 2349template<class _Fp> 2350struct __strip_signature; 2351 2352template<class _Rp, class _Gp, class ..._Ap> 2353struct __strip_signature<_Rp (_Gp::*) (_Ap...)> { using type = _Rp(_Ap...); }; 2354template<class _Rp, class _Gp, class ..._Ap> 2355struct __strip_signature<_Rp (_Gp::*) (_Ap...) const> { using type = _Rp(_Ap...); }; 2356template<class _Rp, class _Gp, class ..._Ap> 2357struct __strip_signature<_Rp (_Gp::*) (_Ap...) volatile> { using type = _Rp(_Ap...); }; 2358template<class _Rp, class _Gp, class ..._Ap> 2359struct __strip_signature<_Rp (_Gp::*) (_Ap...) const volatile> { using type = _Rp(_Ap...); }; 2360 2361template<class _Rp, class _Gp, class ..._Ap> 2362struct __strip_signature<_Rp (_Gp::*) (_Ap...) &> { using type = _Rp(_Ap...); }; 2363template<class _Rp, class _Gp, class ..._Ap> 2364struct __strip_signature<_Rp (_Gp::*) (_Ap...) const &> { using type = _Rp(_Ap...); }; 2365template<class _Rp, class _Gp, class ..._Ap> 2366struct __strip_signature<_Rp (_Gp::*) (_Ap...) volatile &> { using type = _Rp(_Ap...); }; 2367template<class _Rp, class _Gp, class ..._Ap> 2368struct __strip_signature<_Rp (_Gp::*) (_Ap...) const volatile &> { using type = _Rp(_Ap...); }; 2369 2370template<class _Rp, class _Gp, class ..._Ap> 2371struct __strip_signature<_Rp (_Gp::*) (_Ap...) noexcept> { using type = _Rp(_Ap...); }; 2372template<class _Rp, class _Gp, class ..._Ap> 2373struct __strip_signature<_Rp (_Gp::*) (_Ap...) const noexcept> { using type = _Rp(_Ap...); }; 2374template<class _Rp, class _Gp, class ..._Ap> 2375struct __strip_signature<_Rp (_Gp::*) (_Ap...) volatile noexcept> { using type = _Rp(_Ap...); }; 2376template<class _Rp, class _Gp, class ..._Ap> 2377struct __strip_signature<_Rp (_Gp::*) (_Ap...) const volatile noexcept> { using type = _Rp(_Ap...); }; 2378 2379template<class _Rp, class _Gp, class ..._Ap> 2380struct __strip_signature<_Rp (_Gp::*) (_Ap...) & noexcept> { using type = _Rp(_Ap...); }; 2381template<class _Rp, class _Gp, class ..._Ap> 2382struct __strip_signature<_Rp (_Gp::*) (_Ap...) const & noexcept> { using type = _Rp(_Ap...); }; 2383template<class _Rp, class _Gp, class ..._Ap> 2384struct __strip_signature<_Rp (_Gp::*) (_Ap...) volatile & noexcept> { using type = _Rp(_Ap...); }; 2385template<class _Rp, class _Gp, class ..._Ap> 2386struct __strip_signature<_Rp (_Gp::*) (_Ap...) const volatile & noexcept> { using type = _Rp(_Ap...); }; 2387 2388template<class _Fp, class _Stripped = typename __strip_signature<decltype(&_Fp::operator())>::type> 2389function(_Fp) -> function<_Stripped>; 2390#endif // !_LIBCPP_HAS_NO_DEDUCTION_GUIDES 2391 2392template<class _Rp, class ..._ArgTypes> 2393function<_Rp(_ArgTypes...)>::function(const function& __f) : __f_(__f.__f_) {} 2394 2395#if _LIBCPP_STD_VER <= 14 2396template<class _Rp, class ..._ArgTypes> 2397template <class _Alloc> 2398function<_Rp(_ArgTypes...)>::function(allocator_arg_t, const _Alloc&, 2399 const function& __f) : __f_(__f.__f_) {} 2400#endif 2401 2402template <class _Rp, class... _ArgTypes> 2403function<_Rp(_ArgTypes...)>::function(function&& __f) _NOEXCEPT 2404 : __f_(_VSTD::move(__f.__f_)) {} 2405 2406#if _LIBCPP_STD_VER <= 14 2407template<class _Rp, class ..._ArgTypes> 2408template <class _Alloc> 2409function<_Rp(_ArgTypes...)>::function(allocator_arg_t, const _Alloc&, 2410 function&& __f) 2411 : __f_(_VSTD::move(__f.__f_)) {} 2412#endif 2413 2414template <class _Rp, class... _ArgTypes> 2415template <class _Fp, class> 2416function<_Rp(_ArgTypes...)>::function(_Fp __f) : __f_(_VSTD::move(__f)) {} 2417 2418#if _LIBCPP_STD_VER <= 14 2419template <class _Rp, class... _ArgTypes> 2420template <class _Fp, class _Alloc, class> 2421function<_Rp(_ArgTypes...)>::function(allocator_arg_t, const _Alloc& __a, 2422 _Fp __f) 2423 : __f_(_VSTD::move(__f), __a) {} 2424#endif 2425 2426template<class _Rp, class ..._ArgTypes> 2427function<_Rp(_ArgTypes...)>& 2428function<_Rp(_ArgTypes...)>::operator=(const function& __f) 2429{ 2430 function(__f).swap(*this); 2431 return *this; 2432} 2433 2434template<class _Rp, class ..._ArgTypes> 2435function<_Rp(_ArgTypes...)>& 2436function<_Rp(_ArgTypes...)>::operator=(function&& __f) _NOEXCEPT 2437{ 2438 __f_ = std::move(__f.__f_); 2439 return *this; 2440} 2441 2442template<class _Rp, class ..._ArgTypes> 2443function<_Rp(_ArgTypes...)>& 2444function<_Rp(_ArgTypes...)>::operator=(nullptr_t) _NOEXCEPT 2445{ 2446 __f_ = nullptr; 2447 return *this; 2448} 2449 2450template<class _Rp, class ..._ArgTypes> 2451template <class _Fp, class> 2452function<_Rp(_ArgTypes...)>& 2453function<_Rp(_ArgTypes...)>::operator=(_Fp&& __f) 2454{ 2455 function(_VSTD::forward<_Fp>(__f)).swap(*this); 2456 return *this; 2457} 2458 2459template<class _Rp, class ..._ArgTypes> 2460function<_Rp(_ArgTypes...)>::~function() {} 2461 2462template<class _Rp, class ..._ArgTypes> 2463void 2464function<_Rp(_ArgTypes...)>::swap(function& __f) _NOEXCEPT 2465{ 2466 __f_.swap(__f.__f_); 2467} 2468 2469template<class _Rp, class ..._ArgTypes> 2470_Rp 2471function<_Rp(_ArgTypes...)>::operator()(_ArgTypes... __arg) const 2472{ 2473 return __f_(_VSTD::forward<_ArgTypes>(__arg)...); 2474} 2475 2476#ifndef _LIBCPP_NO_RTTI 2477 2478template<class _Rp, class ..._ArgTypes> 2479const std::type_info& 2480function<_Rp(_ArgTypes...)>::target_type() const _NOEXCEPT 2481{ 2482 return __f_.target_type(); 2483} 2484 2485template<class _Rp, class ..._ArgTypes> 2486template <typename _Tp> 2487_Tp* 2488function<_Rp(_ArgTypes...)>::target() _NOEXCEPT 2489{ 2490 return (_Tp*)(__f_.template target<_Tp>()); 2491} 2492 2493template<class _Rp, class ..._ArgTypes> 2494template <typename _Tp> 2495const _Tp* 2496function<_Rp(_ArgTypes...)>::target() const _NOEXCEPT 2497{ 2498 return __f_.template target<_Tp>(); 2499} 2500 2501#endif // _LIBCPP_NO_RTTI 2502 2503template <class _Rp, class... _ArgTypes> 2504inline _LIBCPP_INLINE_VISIBILITY 2505bool 2506operator==(const function<_Rp(_ArgTypes...)>& __f, nullptr_t) _NOEXCEPT {return !__f;} 2507 2508template <class _Rp, class... _ArgTypes> 2509inline _LIBCPP_INLINE_VISIBILITY 2510bool 2511operator==(nullptr_t, const function<_Rp(_ArgTypes...)>& __f) _NOEXCEPT {return !__f;} 2512 2513template <class _Rp, class... _ArgTypes> 2514inline _LIBCPP_INLINE_VISIBILITY 2515bool 2516operator!=(const function<_Rp(_ArgTypes...)>& __f, nullptr_t) _NOEXCEPT {return (bool)__f;} 2517 2518template <class _Rp, class... _ArgTypes> 2519inline _LIBCPP_INLINE_VISIBILITY 2520bool 2521operator!=(nullptr_t, const function<_Rp(_ArgTypes...)>& __f) _NOEXCEPT {return (bool)__f;} 2522 2523template <class _Rp, class... _ArgTypes> 2524inline _LIBCPP_INLINE_VISIBILITY 2525void 2526swap(function<_Rp(_ArgTypes...)>& __x, function<_Rp(_ArgTypes...)>& __y) _NOEXCEPT 2527{return __x.swap(__y);} 2528 2529#else // _LIBCPP_CXX03_LANG 2530 2531#include <__functional_03> 2532 2533#endif 2534 2535//////////////////////////////////////////////////////////////////////////////// 2536// BIND 2537//============================================================================== 2538 2539template<class _Tp> struct __is_bind_expression : public false_type {}; 2540template<class _Tp> struct _LIBCPP_TEMPLATE_VIS is_bind_expression 2541 : public __is_bind_expression<typename remove_cv<_Tp>::type> {}; 2542 2543#if _LIBCPP_STD_VER > 14 2544template <class _Tp> 2545_LIBCPP_INLINE_VAR constexpr size_t is_bind_expression_v = is_bind_expression<_Tp>::value; 2546#endif 2547 2548template<class _Tp> struct __is_placeholder : public integral_constant<int, 0> {}; 2549template<class _Tp> struct _LIBCPP_TEMPLATE_VIS is_placeholder 2550 : public __is_placeholder<typename remove_cv<_Tp>::type> {}; 2551 2552#if _LIBCPP_STD_VER > 14 2553template <class _Tp> 2554_LIBCPP_INLINE_VAR constexpr size_t is_placeholder_v = is_placeholder<_Tp>::value; 2555#endif 2556 2557namespace placeholders 2558{ 2559 2560template <int _Np> struct __ph {}; 2561 2562#if defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY) 2563_LIBCPP_FUNC_VIS extern const __ph<1> _1; 2564_LIBCPP_FUNC_VIS extern const __ph<2> _2; 2565_LIBCPP_FUNC_VIS extern const __ph<3> _3; 2566_LIBCPP_FUNC_VIS extern const __ph<4> _4; 2567_LIBCPP_FUNC_VIS extern const __ph<5> _5; 2568_LIBCPP_FUNC_VIS extern const __ph<6> _6; 2569_LIBCPP_FUNC_VIS extern const __ph<7> _7; 2570_LIBCPP_FUNC_VIS extern const __ph<8> _8; 2571_LIBCPP_FUNC_VIS extern const __ph<9> _9; 2572_LIBCPP_FUNC_VIS extern const __ph<10> _10; 2573#else 2574/* _LIBCPP_INLINE_VAR */ constexpr __ph<1> _1{}; 2575/* _LIBCPP_INLINE_VAR */ constexpr __ph<2> _2{}; 2576/* _LIBCPP_INLINE_VAR */ constexpr __ph<3> _3{}; 2577/* _LIBCPP_INLINE_VAR */ constexpr __ph<4> _4{}; 2578/* _LIBCPP_INLINE_VAR */ constexpr __ph<5> _5{}; 2579/* _LIBCPP_INLINE_VAR */ constexpr __ph<6> _6{}; 2580/* _LIBCPP_INLINE_VAR */ constexpr __ph<7> _7{}; 2581/* _LIBCPP_INLINE_VAR */ constexpr __ph<8> _8{}; 2582/* _LIBCPP_INLINE_VAR */ constexpr __ph<9> _9{}; 2583/* _LIBCPP_INLINE_VAR */ constexpr __ph<10> _10{}; 2584#endif // defined(_LIBCPP_CXX03_LANG) || defined(_LIBCPP_BUILDING_LIBRARY) 2585 2586} // placeholders 2587 2588template<int _Np> 2589struct __is_placeholder<placeholders::__ph<_Np> > 2590 : public integral_constant<int, _Np> {}; 2591 2592 2593#ifndef _LIBCPP_CXX03_LANG 2594 2595template <class _Tp, class _Uj> 2596inline _LIBCPP_INLINE_VISIBILITY 2597_Tp& 2598__mu(reference_wrapper<_Tp> __t, _Uj&) 2599{ 2600 return __t.get(); 2601} 2602 2603template <class _Ti, class ..._Uj, size_t ..._Indx> 2604inline _LIBCPP_INLINE_VISIBILITY 2605typename __invoke_of<_Ti&, _Uj...>::type 2606__mu_expand(_Ti& __ti, tuple<_Uj...>& __uj, __tuple_indices<_Indx...>) 2607{ 2608 return __ti(_VSTD::forward<_Uj>(_VSTD::get<_Indx>(__uj))...); 2609} 2610 2611template <class _Ti, class ..._Uj> 2612inline _LIBCPP_INLINE_VISIBILITY 2613typename _EnableIf 2614< 2615 is_bind_expression<_Ti>::value, 2616 __invoke_of<_Ti&, _Uj...> 2617>::type 2618__mu(_Ti& __ti, tuple<_Uj...>& __uj) 2619{ 2620 typedef typename __make_tuple_indices<sizeof...(_Uj)>::type __indices; 2621 return __mu_expand(__ti, __uj, __indices()); 2622} 2623 2624template <bool IsPh, class _Ti, class _Uj> 2625struct __mu_return2 {}; 2626 2627template <class _Ti, class _Uj> 2628struct __mu_return2<true, _Ti, _Uj> 2629{ 2630 typedef typename tuple_element<is_placeholder<_Ti>::value - 1, _Uj>::type type; 2631}; 2632 2633template <class _Ti, class _Uj> 2634inline _LIBCPP_INLINE_VISIBILITY 2635typename enable_if 2636< 2637 0 < is_placeholder<_Ti>::value, 2638 typename __mu_return2<0 < is_placeholder<_Ti>::value, _Ti, _Uj>::type 2639>::type 2640__mu(_Ti&, _Uj& __uj) 2641{ 2642 const size_t _Indx = is_placeholder<_Ti>::value - 1; 2643 return _VSTD::forward<typename tuple_element<_Indx, _Uj>::type>(_VSTD::get<_Indx>(__uj)); 2644} 2645 2646template <class _Ti, class _Uj> 2647inline _LIBCPP_INLINE_VISIBILITY 2648typename enable_if 2649< 2650 !is_bind_expression<_Ti>::value && 2651 is_placeholder<_Ti>::value == 0 && 2652 !__is_reference_wrapper<_Ti>::value, 2653 _Ti& 2654>::type 2655__mu(_Ti& __ti, _Uj&) 2656{ 2657 return __ti; 2658} 2659 2660template <class _Ti, bool IsReferenceWrapper, bool IsBindEx, bool IsPh, 2661 class _TupleUj> 2662struct __mu_return_impl; 2663 2664template <bool _Invokable, class _Ti, class ..._Uj> 2665struct __mu_return_invokable // false 2666{ 2667 typedef __nat type; 2668}; 2669 2670template <class _Ti, class ..._Uj> 2671struct __mu_return_invokable<true, _Ti, _Uj...> 2672{ 2673 typedef typename __invoke_of<_Ti&, _Uj...>::type type; 2674}; 2675 2676template <class _Ti, class ..._Uj> 2677struct __mu_return_impl<_Ti, false, true, false, tuple<_Uj...> > 2678 : public __mu_return_invokable<__invokable<_Ti&, _Uj...>::value, _Ti, _Uj...> 2679{ 2680}; 2681 2682template <class _Ti, class _TupleUj> 2683struct __mu_return_impl<_Ti, false, false, true, _TupleUj> 2684{ 2685 typedef typename tuple_element<is_placeholder<_Ti>::value - 1, 2686 _TupleUj>::type&& type; 2687}; 2688 2689template <class _Ti, class _TupleUj> 2690struct __mu_return_impl<_Ti, true, false, false, _TupleUj> 2691{ 2692 typedef typename _Ti::type& type; 2693}; 2694 2695template <class _Ti, class _TupleUj> 2696struct __mu_return_impl<_Ti, false, false, false, _TupleUj> 2697{ 2698 typedef _Ti& type; 2699}; 2700 2701template <class _Ti, class _TupleUj> 2702struct __mu_return 2703 : public __mu_return_impl<_Ti, 2704 __is_reference_wrapper<_Ti>::value, 2705 is_bind_expression<_Ti>::value, 2706 0 < is_placeholder<_Ti>::value && 2707 is_placeholder<_Ti>::value <= tuple_size<_TupleUj>::value, 2708 _TupleUj> 2709{ 2710}; 2711 2712template <class _Fp, class _BoundArgs, class _TupleUj> 2713struct __is_valid_bind_return 2714{ 2715 static const bool value = false; 2716}; 2717 2718template <class _Fp, class ..._BoundArgs, class _TupleUj> 2719struct __is_valid_bind_return<_Fp, tuple<_BoundArgs...>, _TupleUj> 2720{ 2721 static const bool value = __invokable<_Fp, 2722 typename __mu_return<_BoundArgs, _TupleUj>::type...>::value; 2723}; 2724 2725template <class _Fp, class ..._BoundArgs, class _TupleUj> 2726struct __is_valid_bind_return<_Fp, const tuple<_BoundArgs...>, _TupleUj> 2727{ 2728 static const bool value = __invokable<_Fp, 2729 typename __mu_return<const _BoundArgs, _TupleUj>::type...>::value; 2730}; 2731 2732template <class _Fp, class _BoundArgs, class _TupleUj, 2733 bool = __is_valid_bind_return<_Fp, _BoundArgs, _TupleUj>::value> 2734struct __bind_return; 2735 2736template <class _Fp, class ..._BoundArgs, class _TupleUj> 2737struct __bind_return<_Fp, tuple<_BoundArgs...>, _TupleUj, true> 2738{ 2739 typedef typename __invoke_of 2740 < 2741 _Fp&, 2742 typename __mu_return 2743 < 2744 _BoundArgs, 2745 _TupleUj 2746 >::type... 2747 >::type type; 2748}; 2749 2750template <class _Fp, class ..._BoundArgs, class _TupleUj> 2751struct __bind_return<_Fp, const tuple<_BoundArgs...>, _TupleUj, true> 2752{ 2753 typedef typename __invoke_of 2754 < 2755 _Fp&, 2756 typename __mu_return 2757 < 2758 const _BoundArgs, 2759 _TupleUj 2760 >::type... 2761 >::type type; 2762}; 2763 2764template <class _Fp, class _BoundArgs, size_t ..._Indx, class _Args> 2765inline _LIBCPP_INLINE_VISIBILITY 2766typename __bind_return<_Fp, _BoundArgs, _Args>::type 2767__apply_functor(_Fp& __f, _BoundArgs& __bound_args, __tuple_indices<_Indx...>, 2768 _Args&& __args) 2769{ 2770 return _VSTD::__invoke(__f, _VSTD::__mu(_VSTD::get<_Indx>(__bound_args), __args)...); 2771} 2772 2773template<class _Fp, class ..._BoundArgs> 2774class __bind 2775 : public __weak_result_type<typename decay<_Fp>::type> 2776{ 2777protected: 2778 typedef typename decay<_Fp>::type _Fd; 2779 typedef tuple<typename decay<_BoundArgs>::type...> _Td; 2780private: 2781 _Fd __f_; 2782 _Td __bound_args_; 2783 2784 typedef typename __make_tuple_indices<sizeof...(_BoundArgs)>::type __indices; 2785public: 2786 template <class _Gp, class ..._BA, 2787 class = typename enable_if 2788 < 2789 is_constructible<_Fd, _Gp>::value && 2790 !is_same<typename remove_reference<_Gp>::type, 2791 __bind>::value 2792 >::type> 2793 _LIBCPP_INLINE_VISIBILITY 2794 explicit __bind(_Gp&& __f, _BA&& ...__bound_args) 2795 : __f_(_VSTD::forward<_Gp>(__f)), 2796 __bound_args_(_VSTD::forward<_BA>(__bound_args)...) {} 2797 2798 template <class ..._Args> 2799 _LIBCPP_INLINE_VISIBILITY 2800 typename __bind_return<_Fd, _Td, tuple<_Args&&...> >::type 2801 operator()(_Args&& ...__args) 2802 { 2803 return _VSTD::__apply_functor(__f_, __bound_args_, __indices(), 2804 tuple<_Args&&...>(_VSTD::forward<_Args>(__args)...)); 2805 } 2806 2807 template <class ..._Args> 2808 _LIBCPP_INLINE_VISIBILITY 2809 typename __bind_return<const _Fd, const _Td, tuple<_Args&&...> >::type 2810 operator()(_Args&& ...__args) const 2811 { 2812 return _VSTD::__apply_functor(__f_, __bound_args_, __indices(), 2813 tuple<_Args&&...>(_VSTD::forward<_Args>(__args)...)); 2814 } 2815}; 2816 2817template<class _Fp, class ..._BoundArgs> 2818struct __is_bind_expression<__bind<_Fp, _BoundArgs...> > : public true_type {}; 2819 2820template<class _Rp, class _Fp, class ..._BoundArgs> 2821class __bind_r 2822 : public __bind<_Fp, _BoundArgs...> 2823{ 2824 typedef __bind<_Fp, _BoundArgs...> base; 2825 typedef typename base::_Fd _Fd; 2826 typedef typename base::_Td _Td; 2827public: 2828 typedef _Rp result_type; 2829 2830 2831 template <class _Gp, class ..._BA, 2832 class = typename enable_if 2833 < 2834 is_constructible<_Fd, _Gp>::value && 2835 !is_same<typename remove_reference<_Gp>::type, 2836 __bind_r>::value 2837 >::type> 2838 _LIBCPP_INLINE_VISIBILITY 2839 explicit __bind_r(_Gp&& __f, _BA&& ...__bound_args) 2840 : base(_VSTD::forward<_Gp>(__f), 2841 _VSTD::forward<_BA>(__bound_args)...) {} 2842 2843 template <class ..._Args> 2844 _LIBCPP_INLINE_VISIBILITY 2845 typename enable_if 2846 < 2847 is_convertible<typename __bind_return<_Fd, _Td, tuple<_Args&&...> >::type, 2848 result_type>::value || is_void<_Rp>::value, 2849 result_type 2850 >::type 2851 operator()(_Args&& ...__args) 2852 { 2853 typedef __invoke_void_return_wrapper<_Rp> _Invoker; 2854 return _Invoker::__call(static_cast<base&>(*this), _VSTD::forward<_Args>(__args)...); 2855 } 2856 2857 template <class ..._Args> 2858 _LIBCPP_INLINE_VISIBILITY 2859 typename enable_if 2860 < 2861 is_convertible<typename __bind_return<const _Fd, const _Td, tuple<_Args&&...> >::type, 2862 result_type>::value || is_void<_Rp>::value, 2863 result_type 2864 >::type 2865 operator()(_Args&& ...__args) const 2866 { 2867 typedef __invoke_void_return_wrapper<_Rp> _Invoker; 2868 return _Invoker::__call(static_cast<base const&>(*this), _VSTD::forward<_Args>(__args)...); 2869 } 2870}; 2871 2872template<class _Rp, class _Fp, class ..._BoundArgs> 2873struct __is_bind_expression<__bind_r<_Rp, _Fp, _BoundArgs...> > : public true_type {}; 2874 2875template<class _Fp, class ..._BoundArgs> 2876inline _LIBCPP_INLINE_VISIBILITY 2877__bind<_Fp, _BoundArgs...> 2878bind(_Fp&& __f, _BoundArgs&&... __bound_args) 2879{ 2880 typedef __bind<_Fp, _BoundArgs...> type; 2881 return type(_VSTD::forward<_Fp>(__f), _VSTD::forward<_BoundArgs>(__bound_args)...); 2882} 2883 2884template<class _Rp, class _Fp, class ..._BoundArgs> 2885inline _LIBCPP_INLINE_VISIBILITY 2886__bind_r<_Rp, _Fp, _BoundArgs...> 2887bind(_Fp&& __f, _BoundArgs&&... __bound_args) 2888{ 2889 typedef __bind_r<_Rp, _Fp, _BoundArgs...> type; 2890 return type(_VSTD::forward<_Fp>(__f), _VSTD::forward<_BoundArgs>(__bound_args)...); 2891} 2892 2893#endif // _LIBCPP_CXX03_LANG 2894 2895#if _LIBCPP_STD_VER > 14 2896 2897template <class _Fn, class ..._Args> 2898invoke_result_t<_Fn, _Args...> 2899invoke(_Fn&& __f, _Args&&... __args) 2900 noexcept(is_nothrow_invocable_v<_Fn, _Args...>) 2901{ 2902 return _VSTD::__invoke(_VSTD::forward<_Fn>(__f), _VSTD::forward<_Args>(__args)...); 2903} 2904 2905template <class _DecayFunc> 2906class _LIBCPP_TEMPLATE_VIS __not_fn_imp { 2907 _DecayFunc __fd; 2908 2909public: 2910 __not_fn_imp() = delete; 2911 2912 template <class ..._Args> 2913 _LIBCPP_INLINE_VISIBILITY 2914 auto operator()(_Args&& ...__args) & 2915 noexcept(noexcept(!_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...))) 2916 -> decltype( !_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...)) 2917 { return !_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...); } 2918 2919 template <class ..._Args> 2920 _LIBCPP_INLINE_VISIBILITY 2921 auto operator()(_Args&& ...__args) && 2922 noexcept(noexcept(!_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...))) 2923 -> decltype( !_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...)) 2924 { return !_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...); } 2925 2926 template <class ..._Args> 2927 _LIBCPP_INLINE_VISIBILITY 2928 auto operator()(_Args&& ...__args) const& 2929 noexcept(noexcept(!_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...))) 2930 -> decltype( !_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...)) 2931 { return !_VSTD::invoke(__fd, _VSTD::forward<_Args>(__args)...); } 2932 2933 2934 template <class ..._Args> 2935 _LIBCPP_INLINE_VISIBILITY 2936 auto operator()(_Args&& ...__args) const&& 2937 noexcept(noexcept(!_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...))) 2938 -> decltype( !_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...)) 2939 { return !_VSTD::invoke(_VSTD::move(__fd), _VSTD::forward<_Args>(__args)...); } 2940 2941private: 2942 template <class _RawFunc, 2943 class = enable_if_t<!is_same<decay_t<_RawFunc>, __not_fn_imp>::value>> 2944 _LIBCPP_INLINE_VISIBILITY 2945 explicit __not_fn_imp(_RawFunc&& __rf) 2946 : __fd(_VSTD::forward<_RawFunc>(__rf)) {} 2947 2948 template <class _RawFunc> 2949 friend inline _LIBCPP_INLINE_VISIBILITY 2950 __not_fn_imp<decay_t<_RawFunc>> not_fn(_RawFunc&&); 2951}; 2952 2953template <class _RawFunc> 2954inline _LIBCPP_INLINE_VISIBILITY 2955__not_fn_imp<decay_t<_RawFunc>> not_fn(_RawFunc&& __fn) { 2956 return __not_fn_imp<decay_t<_RawFunc>>(_VSTD::forward<_RawFunc>(__fn)); 2957} 2958 2959#endif 2960 2961// struct hash<T*> in <memory> 2962 2963template <class _BinaryPredicate, class _ForwardIterator1, class _ForwardIterator2> 2964pair<_ForwardIterator1, _ForwardIterator1> _LIBCPP_CONSTEXPR_AFTER_CXX11 2965__search(_ForwardIterator1 __first1, _ForwardIterator1 __last1, 2966 _ForwardIterator2 __first2, _ForwardIterator2 __last2, _BinaryPredicate __pred, 2967 forward_iterator_tag, forward_iterator_tag) 2968{ 2969 if (__first2 == __last2) 2970 return make_pair(__first1, __first1); // Everything matches an empty sequence 2971 while (true) 2972 { 2973 // Find first element in sequence 1 that matchs *__first2, with a mininum of loop checks 2974 while (true) 2975 { 2976 if (__first1 == __last1) // return __last1 if no element matches *__first2 2977 return make_pair(__last1, __last1); 2978 if (__pred(*__first1, *__first2)) 2979 break; 2980 ++__first1; 2981 } 2982 // *__first1 matches *__first2, now match elements after here 2983 _ForwardIterator1 __m1 = __first1; 2984 _ForwardIterator2 __m2 = __first2; 2985 while (true) 2986 { 2987 if (++__m2 == __last2) // If pattern exhausted, __first1 is the answer (works for 1 element pattern) 2988 return make_pair(__first1, __m1); 2989 if (++__m1 == __last1) // Otherwise if source exhaused, pattern not found 2990 return make_pair(__last1, __last1); 2991 if (!__pred(*__m1, *__m2)) // if there is a mismatch, restart with a new __first1 2992 { 2993 ++__first1; 2994 break; 2995 } // else there is a match, check next elements 2996 } 2997 } 2998} 2999 3000template <class _BinaryPredicate, class _RandomAccessIterator1, class _RandomAccessIterator2> 3001_LIBCPP_CONSTEXPR_AFTER_CXX11 3002pair<_RandomAccessIterator1, _RandomAccessIterator1> 3003__search(_RandomAccessIterator1 __first1, _RandomAccessIterator1 __last1, 3004 _RandomAccessIterator2 __first2, _RandomAccessIterator2 __last2, _BinaryPredicate __pred, 3005 random_access_iterator_tag, random_access_iterator_tag) 3006{ 3007 typedef typename iterator_traits<_RandomAccessIterator1>::difference_type _D1; 3008 typedef typename iterator_traits<_RandomAccessIterator2>::difference_type _D2; 3009 // Take advantage of knowing source and pattern lengths. Stop short when source is smaller than pattern 3010 const _D2 __len2 = __last2 - __first2; 3011 if (__len2 == 0) 3012 return make_pair(__first1, __first1); 3013 const _D1 __len1 = __last1 - __first1; 3014 if (__len1 < __len2) 3015 return make_pair(__last1, __last1); 3016 const _RandomAccessIterator1 __s = __last1 - (__len2 - 1); // Start of pattern match can't go beyond here 3017 3018 while (true) 3019 { 3020 while (true) 3021 { 3022 if (__first1 == __s) 3023 return make_pair(__last1, __last1); 3024 if (__pred(*__first1, *__first2)) 3025 break; 3026 ++__first1; 3027 } 3028 3029 _RandomAccessIterator1 __m1 = __first1; 3030 _RandomAccessIterator2 __m2 = __first2; 3031 while (true) 3032 { 3033 if (++__m2 == __last2) 3034 return make_pair(__first1, __first1 + __len2); 3035 ++__m1; // no need to check range on __m1 because __s guarantees we have enough source 3036 if (!__pred(*__m1, *__m2)) 3037 { 3038 ++__first1; 3039 break; 3040 } 3041 } 3042 } 3043} 3044 3045#if _LIBCPP_STD_VER > 14 3046 3047// default searcher 3048template<class _ForwardIterator, class _BinaryPredicate = equal_to<>> 3049class _LIBCPP_TYPE_VIS default_searcher { 3050public: 3051 _LIBCPP_INLINE_VISIBILITY 3052 default_searcher(_ForwardIterator __f, _ForwardIterator __l, 3053 _BinaryPredicate __p = _BinaryPredicate()) 3054 : __first_(__f), __last_(__l), __pred_(__p) {} 3055 3056 template <typename _ForwardIterator2> 3057 _LIBCPP_INLINE_VISIBILITY 3058 pair<_ForwardIterator2, _ForwardIterator2> 3059 operator () (_ForwardIterator2 __f, _ForwardIterator2 __l) const 3060 { 3061 return _VSTD::__search(__f, __l, __first_, __last_, __pred_, 3062 typename _VSTD::iterator_traits<_ForwardIterator>::iterator_category(), 3063 typename _VSTD::iterator_traits<_ForwardIterator2>::iterator_category()); 3064 } 3065 3066private: 3067 _ForwardIterator __first_; 3068 _ForwardIterator __last_; 3069 _BinaryPredicate __pred_; 3070 }; 3071 3072#endif // _LIBCPP_STD_VER > 14 3073 3074#if _LIBCPP_STD_VER > 17 3075template <class _Tp> 3076using unwrap_reference_t = typename unwrap_reference<_Tp>::type; 3077 3078template <class _Tp> 3079using unwrap_ref_decay_t = typename unwrap_ref_decay<_Tp>::type; 3080#endif // > C++17 3081 3082template <class _Container, class _Predicate> 3083inline void __libcpp_erase_if_container( _Container& __c, _Predicate __pred) 3084{ 3085 for (typename _Container::iterator __iter = __c.begin(), __last = __c.end(); __iter != __last;) 3086 { 3087 if (__pred(*__iter)) 3088 __iter = __c.erase(__iter); 3089 else 3090 ++__iter; 3091 } 3092} 3093 3094_LIBCPP_END_NAMESPACE_STD 3095 3096#endif // _LIBCPP_FUNCTIONAL 3097