1// -*- C++ -*- 2//===--------------------------- random -----------------------------------===// 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_RANDOM 11#define _LIBCPP_RANDOM 12 13/* 14 random synopsis 15 16#include <initializer_list> 17 18namespace std 19{ 20 21// Engines 22 23template <class UIntType, UIntType a, UIntType c, UIntType m> 24class linear_congruential_engine 25{ 26public: 27 // types 28 typedef UIntType result_type; 29 30 // engine characteristics 31 static constexpr result_type multiplier = a; 32 static constexpr result_type increment = c; 33 static constexpr result_type modulus = m; 34 static constexpr result_type min() { return c == 0u ? 1u: 0u;} 35 static constexpr result_type max() { return m - 1u;} 36 static constexpr result_type default_seed = 1u; 37 38 // constructors and seeding functions 39 explicit linear_congruential_engine(result_type s = default_seed); 40 template<class Sseq> explicit linear_congruential_engine(Sseq& q); 41 void seed(result_type s = default_seed); 42 template<class Sseq> void seed(Sseq& q); 43 44 // generating functions 45 result_type operator()(); 46 void discard(unsigned long long z); 47}; 48 49template <class UIntType, UIntType a, UIntType c, UIntType m> 50bool 51operator==(const linear_congruential_engine<UIntType, a, c, m>& x, 52 const linear_congruential_engine<UIntType, a, c, m>& y); 53 54template <class UIntType, UIntType a, UIntType c, UIntType m> 55bool 56operator!=(const linear_congruential_engine<UIntType, a, c, m>& x, 57 const linear_congruential_engine<UIntType, a, c, m>& y); 58 59template <class charT, class traits, 60 class UIntType, UIntType a, UIntType c, UIntType m> 61basic_ostream<charT, traits>& 62operator<<(basic_ostream<charT, traits>& os, 63 const linear_congruential_engine<UIntType, a, c, m>& x); 64 65template <class charT, class traits, 66 class UIntType, UIntType a, UIntType c, UIntType m> 67basic_istream<charT, traits>& 68operator>>(basic_istream<charT, traits>& is, 69 linear_congruential_engine<UIntType, a, c, m>& x); 70 71template <class UIntType, size_t w, size_t n, size_t m, size_t r, 72 UIntType a, size_t u, UIntType d, size_t s, 73 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 74class mersenne_twister_engine 75{ 76public: 77 // types 78 typedef UIntType result_type; 79 80 // engine characteristics 81 static constexpr size_t word_size = w; 82 static constexpr size_t state_size = n; 83 static constexpr size_t shift_size = m; 84 static constexpr size_t mask_bits = r; 85 static constexpr result_type xor_mask = a; 86 static constexpr size_t tempering_u = u; 87 static constexpr result_type tempering_d = d; 88 static constexpr size_t tempering_s = s; 89 static constexpr result_type tempering_b = b; 90 static constexpr size_t tempering_t = t; 91 static constexpr result_type tempering_c = c; 92 static constexpr size_t tempering_l = l; 93 static constexpr result_type initialization_multiplier = f; 94 static constexpr result_type min () { return 0; } 95 static constexpr result_type max() { return 2^w - 1; } 96 static constexpr result_type default_seed = 5489u; 97 98 // constructors and seeding functions 99 explicit mersenne_twister_engine(result_type value = default_seed); 100 template<class Sseq> explicit mersenne_twister_engine(Sseq& q); 101 void seed(result_type value = default_seed); 102 template<class Sseq> void seed(Sseq& q); 103 104 // generating functions 105 result_type operator()(); 106 void discard(unsigned long long z); 107}; 108 109template <class UIntType, size_t w, size_t n, size_t m, size_t r, 110 UIntType a, size_t u, UIntType d, size_t s, 111 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 112bool 113operator==( 114 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x, 115 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& y); 116 117template <class UIntType, size_t w, size_t n, size_t m, size_t r, 118 UIntType a, size_t u, UIntType d, size_t s, 119 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 120bool 121operator!=( 122 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x, 123 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& y); 124 125template <class charT, class traits, 126 class UIntType, size_t w, size_t n, size_t m, size_t r, 127 UIntType a, size_t u, UIntType d, size_t s, 128 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 129basic_ostream<charT, traits>& 130operator<<(basic_ostream<charT, traits>& os, 131 const mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x); 132 133template <class charT, class traits, 134 class UIntType, size_t w, size_t n, size_t m, size_t r, 135 UIntType a, size_t u, UIntType d, size_t s, 136 UIntType b, size_t t, UIntType c, size_t l, UIntType f> 137basic_istream<charT, traits>& 138operator>>(basic_istream<charT, traits>& is, 139 mersenne_twister_engine<UIntType, w, n, m, r, a, u, d, s, b, t, c, l, f>& x); 140 141template<class UIntType, size_t w, size_t s, size_t r> 142class subtract_with_carry_engine 143{ 144public: 145 // types 146 typedef UIntType result_type; 147 148 // engine characteristics 149 static constexpr size_t word_size = w; 150 static constexpr size_t short_lag = s; 151 static constexpr size_t long_lag = r; 152 static constexpr result_type min() { return 0; } 153 static constexpr result_type max() { return m-1; } 154 static constexpr result_type default_seed = 19780503u; 155 156 // constructors and seeding functions 157 explicit subtract_with_carry_engine(result_type value = default_seed); 158 template<class Sseq> explicit subtract_with_carry_engine(Sseq& q); 159 void seed(result_type value = default_seed); 160 template<class Sseq> void seed(Sseq& q); 161 162 // generating functions 163 result_type operator()(); 164 void discard(unsigned long long z); 165}; 166 167template<class UIntType, size_t w, size_t s, size_t r> 168bool 169operator==( 170 const subtract_with_carry_engine<UIntType, w, s, r>& x, 171 const subtract_with_carry_engine<UIntType, w, s, r>& y); 172 173template<class UIntType, size_t w, size_t s, size_t r> 174bool 175operator!=( 176 const subtract_with_carry_engine<UIntType, w, s, r>& x, 177 const subtract_with_carry_engine<UIntType, w, s, r>& y); 178 179template <class charT, class traits, 180 class UIntType, size_t w, size_t s, size_t r> 181basic_ostream<charT, traits>& 182operator<<(basic_ostream<charT, traits>& os, 183 const subtract_with_carry_engine<UIntType, w, s, r>& x); 184 185template <class charT, class traits, 186 class UIntType, size_t w, size_t s, size_t r> 187basic_istream<charT, traits>& 188operator>>(basic_istream<charT, traits>& is, 189 subtract_with_carry_engine<UIntType, w, s, r>& x); 190 191template<class Engine, size_t p, size_t r> 192class discard_block_engine 193{ 194public: 195 // types 196 typedef typename Engine::result_type result_type; 197 198 // engine characteristics 199 static constexpr size_t block_size = p; 200 static constexpr size_t used_block = r; 201 static constexpr result_type min() { return Engine::min(); } 202 static constexpr result_type max() { return Engine::max(); } 203 204 // constructors and seeding functions 205 discard_block_engine(); 206 explicit discard_block_engine(const Engine& e); 207 explicit discard_block_engine(Engine&& e); 208 explicit discard_block_engine(result_type s); 209 template<class Sseq> explicit discard_block_engine(Sseq& q); 210 void seed(); 211 void seed(result_type s); 212 template<class Sseq> void seed(Sseq& q); 213 214 // generating functions 215 result_type operator()(); 216 void discard(unsigned long long z); 217 218 // property functions 219 const Engine& base() const noexcept; 220}; 221 222template<class Engine, size_t p, size_t r> 223bool 224operator==( 225 const discard_block_engine<Engine, p, r>& x, 226 const discard_block_engine<Engine, p, r>& y); 227 228template<class Engine, size_t p, size_t r> 229bool 230operator!=( 231 const discard_block_engine<Engine, p, r>& x, 232 const discard_block_engine<Engine, p, r>& y); 233 234template <class charT, class traits, 235 class Engine, size_t p, size_t r> 236basic_ostream<charT, traits>& 237operator<<(basic_ostream<charT, traits>& os, 238 const discard_block_engine<Engine, p, r>& x); 239 240template <class charT, class traits, 241 class Engine, size_t p, size_t r> 242basic_istream<charT, traits>& 243operator>>(basic_istream<charT, traits>& is, 244 discard_block_engine<Engine, p, r>& x); 245 246template<class Engine, size_t w, class UIntType> 247class independent_bits_engine 248{ 249public: 250 // types 251 typedef UIntType result_type; 252 253 // engine characteristics 254 static constexpr result_type min() { return 0; } 255 static constexpr result_type max() { return 2^w - 1; } 256 257 // constructors and seeding functions 258 independent_bits_engine(); 259 explicit independent_bits_engine(const Engine& e); 260 explicit independent_bits_engine(Engine&& e); 261 explicit independent_bits_engine(result_type s); 262 template<class Sseq> explicit independent_bits_engine(Sseq& q); 263 void seed(); 264 void seed(result_type s); 265 template<class Sseq> void seed(Sseq& q); 266 267 // generating functions 268 result_type operator()(); void discard(unsigned long long z); 269 270 // property functions 271 const Engine& base() const noexcept; 272}; 273 274template<class Engine, size_t w, class UIntType> 275bool 276operator==( 277 const independent_bits_engine<Engine, w, UIntType>& x, 278 const independent_bits_engine<Engine, w, UIntType>& y); 279 280template<class Engine, size_t w, class UIntType> 281bool 282operator!=( 283 const independent_bits_engine<Engine, w, UIntType>& x, 284 const independent_bits_engine<Engine, w, UIntType>& y); 285 286template <class charT, class traits, 287 class Engine, size_t w, class UIntType> 288basic_ostream<charT, traits>& 289operator<<(basic_ostream<charT, traits>& os, 290 const independent_bits_engine<Engine, w, UIntType>& x); 291 292template <class charT, class traits, 293 class Engine, size_t w, class UIntType> 294basic_istream<charT, traits>& 295operator>>(basic_istream<charT, traits>& is, 296 independent_bits_engine<Engine, w, UIntType>& x); 297 298template<class Engine, size_t k> 299class shuffle_order_engine 300{ 301public: 302 // types 303 typedef typename Engine::result_type result_type; 304 305 // engine characteristics 306 static constexpr size_t table_size = k; 307 static constexpr result_type min() { return Engine::min; } 308 static constexpr result_type max() { return Engine::max; } 309 310 // constructors and seeding functions 311 shuffle_order_engine(); 312 explicit shuffle_order_engine(const Engine& e); 313 explicit shuffle_order_engine(Engine&& e); 314 explicit shuffle_order_engine(result_type s); 315 template<class Sseq> explicit shuffle_order_engine(Sseq& q); 316 void seed(); 317 void seed(result_type s); 318 template<class Sseq> void seed(Sseq& q); 319 320 // generating functions 321 result_type operator()(); 322 void discard(unsigned long long z); 323 324 // property functions 325 const Engine& base() const noexcept; 326}; 327 328template<class Engine, size_t k> 329bool 330operator==( 331 const shuffle_order_engine<Engine, k>& x, 332 const shuffle_order_engine<Engine, k>& y); 333 334template<class Engine, size_t k> 335bool 336operator!=( 337 const shuffle_order_engine<Engine, k>& x, 338 const shuffle_order_engine<Engine, k>& y); 339 340template <class charT, class traits, 341 class Engine, size_t k> 342basic_ostream<charT, traits>& 343operator<<(basic_ostream<charT, traits>& os, 344 const shuffle_order_engine<Engine, k>& x); 345 346template <class charT, class traits, 347 class Engine, size_t k> 348basic_istream<charT, traits>& 349operator>>(basic_istream<charT, traits>& is, 350 shuffle_order_engine<Engine, k>& x); 351 352typedef linear_congruential_engine<uint_fast32_t, 16807, 0, 2147483647> 353 minstd_rand0; 354typedef linear_congruential_engine<uint_fast32_t, 48271, 0, 2147483647> 355 minstd_rand; 356typedef mersenne_twister_engine<uint_fast32_t, 32, 624, 397, 31, 357 0x9908b0df, 358 11, 0xffffffff, 359 7, 0x9d2c5680, 360 15, 0xefc60000, 361 18, 1812433253> mt19937; 362typedef mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31, 363 0xb5026f5aa96619e9, 364 29, 0x5555555555555555, 365 17, 0x71d67fffeda60000, 366 37, 0xfff7eee000000000, 367 43, 6364136223846793005> mt19937_64; 368typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24> ranlux24_base; 369typedef subtract_with_carry_engine<uint_fast64_t, 48, 5, 12> ranlux48_base; 370typedef discard_block_engine<ranlux24_base, 223, 23> ranlux24; 371typedef discard_block_engine<ranlux48_base, 389, 11> ranlux48; 372typedef shuffle_order_engine<minstd_rand0, 256> knuth_b; 373typedef minstd_rand default_random_engine; 374 375// Generators 376 377class random_device 378{ 379public: 380 // types 381 typedef unsigned int result_type; 382 383 // generator characteristics 384 static constexpr result_type min() { return numeric_limits<result_type>::min(); } 385 static constexpr result_type max() { return numeric_limits<result_type>::max(); } 386 387 // constructors 388 explicit random_device(const string& token = "/dev/urandom"); 389 390 // generating functions 391 result_type operator()(); 392 393 // property functions 394 double entropy() const noexcept; 395 396 // no copy functions 397 random_device(const random_device& ) = delete; 398 void operator=(const random_device& ) = delete; 399}; 400 401// Utilities 402 403class seed_seq 404{ 405public: 406 // types 407 typedef uint_least32_t result_type; 408 409 // constructors 410 seed_seq(); 411 template<class T> 412 seed_seq(initializer_list<T> il); 413 template<class InputIterator> 414 seed_seq(InputIterator begin, InputIterator end); 415 416 // generating functions 417 template<class RandomAccessIterator> 418 void generate(RandomAccessIterator begin, RandomAccessIterator end); 419 420 // property functions 421 size_t size() const; 422 template<class OutputIterator> 423 void param(OutputIterator dest) const; 424 425 // no copy functions 426 seed_seq(const seed_seq&) = delete; 427 void operator=(const seed_seq& ) = delete; 428}; 429 430template<class RealType, size_t bits, class URNG> 431 RealType generate_canonical(URNG& g); 432 433// Distributions 434 435template<class IntType = int> 436class uniform_int_distribution 437{ 438public: 439 // types 440 typedef IntType result_type; 441 442 class param_type 443 { 444 public: 445 typedef uniform_int_distribution distribution_type; 446 447 explicit param_type(IntType a = 0, 448 IntType b = numeric_limits<IntType>::max()); 449 450 result_type a() const; 451 result_type b() const; 452 453 friend bool operator==(const param_type& x, const param_type& y); 454 friend bool operator!=(const param_type& x, const param_type& y); 455 }; 456 457 // constructors and reset functions 458 explicit uniform_int_distribution(IntType a = 0, 459 IntType b = numeric_limits<IntType>::max()); 460 explicit uniform_int_distribution(const param_type& parm); 461 void reset(); 462 463 // generating functions 464 template<class URNG> result_type operator()(URNG& g); 465 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 466 467 // property functions 468 result_type a() const; 469 result_type b() const; 470 471 param_type param() const; 472 void param(const param_type& parm); 473 474 result_type min() const; 475 result_type max() const; 476 477 friend bool operator==(const uniform_int_distribution& x, 478 const uniform_int_distribution& y); 479 friend bool operator!=(const uniform_int_distribution& x, 480 const uniform_int_distribution& y); 481 482 template <class charT, class traits> 483 friend 484 basic_ostream<charT, traits>& 485 operator<<(basic_ostream<charT, traits>& os, 486 const uniform_int_distribution& x); 487 488 template <class charT, class traits> 489 friend 490 basic_istream<charT, traits>& 491 operator>>(basic_istream<charT, traits>& is, 492 uniform_int_distribution& x); 493}; 494 495template<class RealType = double> 496class uniform_real_distribution 497{ 498public: 499 // types 500 typedef RealType result_type; 501 502 class param_type 503 { 504 public: 505 typedef uniform_real_distribution distribution_type; 506 507 explicit param_type(RealType a = 0, 508 RealType b = 1); 509 510 result_type a() const; 511 result_type b() const; 512 513 friend bool operator==(const param_type& x, const param_type& y); 514 friend bool operator!=(const param_type& x, const param_type& y); 515 }; 516 517 // constructors and reset functions 518 explicit uniform_real_distribution(RealType a = 0.0, RealType b = 1.0); 519 explicit uniform_real_distribution(const param_type& parm); 520 void reset(); 521 522 // generating functions 523 template<class URNG> result_type operator()(URNG& g); 524 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 525 526 // property functions 527 result_type a() const; 528 result_type b() const; 529 530 param_type param() const; 531 void param(const param_type& parm); 532 533 result_type min() const; 534 result_type max() const; 535 536 friend bool operator==(const uniform_real_distribution& x, 537 const uniform_real_distribution& y); 538 friend bool operator!=(const uniform_real_distribution& x, 539 const uniform_real_distribution& y); 540 541 template <class charT, class traits> 542 friend 543 basic_ostream<charT, traits>& 544 operator<<(basic_ostream<charT, traits>& os, 545 const uniform_real_distribution& x); 546 547 template <class charT, class traits> 548 friend 549 basic_istream<charT, traits>& 550 operator>>(basic_istream<charT, traits>& is, 551 uniform_real_distribution& x); 552}; 553 554class bernoulli_distribution 555{ 556public: 557 // types 558 typedef bool result_type; 559 560 class param_type 561 { 562 public: 563 typedef bernoulli_distribution distribution_type; 564 565 explicit param_type(double p = 0.5); 566 567 double p() const; 568 569 friend bool operator==(const param_type& x, const param_type& y); 570 friend bool operator!=(const param_type& x, const param_type& y); 571 }; 572 573 // constructors and reset functions 574 explicit bernoulli_distribution(double p = 0.5); 575 explicit bernoulli_distribution(const param_type& parm); 576 void reset(); 577 578 // generating functions 579 template<class URNG> result_type operator()(URNG& g); 580 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 581 582 // property functions 583 double p() const; 584 585 param_type param() const; 586 void param(const param_type& parm); 587 588 result_type min() const; 589 result_type max() const; 590 591 friend bool operator==(const bernoulli_distribution& x, 592 const bernoulli_distribution& y); 593 friend bool operator!=(const bernoulli_distribution& x, 594 const bernoulli_distribution& y); 595 596 template <class charT, class traits> 597 friend 598 basic_ostream<charT, traits>& 599 operator<<(basic_ostream<charT, traits>& os, 600 const bernoulli_distribution& x); 601 602 template <class charT, class traits> 603 friend 604 basic_istream<charT, traits>& 605 operator>>(basic_istream<charT, traits>& is, 606 bernoulli_distribution& x); 607}; 608 609template<class IntType = int> 610class binomial_distribution 611{ 612public: 613 // types 614 typedef IntType result_type; 615 616 class param_type 617 { 618 public: 619 typedef binomial_distribution distribution_type; 620 621 explicit param_type(IntType t = 1, double p = 0.5); 622 623 IntType t() const; 624 double p() const; 625 626 friend bool operator==(const param_type& x, const param_type& y); 627 friend bool operator!=(const param_type& x, const param_type& y); 628 }; 629 630 // constructors and reset functions 631 explicit binomial_distribution(IntType t = 1, double p = 0.5); 632 explicit binomial_distribution(const param_type& parm); 633 void reset(); 634 635 // generating functions 636 template<class URNG> result_type operator()(URNG& g); 637 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 638 639 // property functions 640 IntType t() const; 641 double p() const; 642 643 param_type param() const; 644 void param(const param_type& parm); 645 646 result_type min() const; 647 result_type max() const; 648 649 friend bool operator==(const binomial_distribution& x, 650 const binomial_distribution& y); 651 friend bool operator!=(const binomial_distribution& x, 652 const binomial_distribution& y); 653 654 template <class charT, class traits> 655 friend 656 basic_ostream<charT, traits>& 657 operator<<(basic_ostream<charT, traits>& os, 658 const binomial_distribution& x); 659 660 template <class charT, class traits> 661 friend 662 basic_istream<charT, traits>& 663 operator>>(basic_istream<charT, traits>& is, 664 binomial_distribution& x); 665}; 666 667template<class IntType = int> 668class geometric_distribution 669{ 670public: 671 // types 672 typedef IntType result_type; 673 674 class param_type 675 { 676 public: 677 typedef geometric_distribution distribution_type; 678 679 explicit param_type(double p = 0.5); 680 681 double p() const; 682 683 friend bool operator==(const param_type& x, const param_type& y); 684 friend bool operator!=(const param_type& x, const param_type& y); 685 }; 686 687 // constructors and reset functions 688 explicit geometric_distribution(double p = 0.5); 689 explicit geometric_distribution(const param_type& parm); 690 void reset(); 691 692 // generating functions 693 template<class URNG> result_type operator()(URNG& g); 694 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 695 696 // property functions 697 double p() const; 698 699 param_type param() const; 700 void param(const param_type& parm); 701 702 result_type min() const; 703 result_type max() const; 704 705 friend bool operator==(const geometric_distribution& x, 706 const geometric_distribution& y); 707 friend bool operator!=(const geometric_distribution& x, 708 const geometric_distribution& y); 709 710 template <class charT, class traits> 711 friend 712 basic_ostream<charT, traits>& 713 operator<<(basic_ostream<charT, traits>& os, 714 const geometric_distribution& x); 715 716 template <class charT, class traits> 717 friend 718 basic_istream<charT, traits>& 719 operator>>(basic_istream<charT, traits>& is, 720 geometric_distribution& x); 721}; 722 723template<class IntType = int> 724class negative_binomial_distribution 725{ 726public: 727 // types 728 typedef IntType result_type; 729 730 class param_type 731 { 732 public: 733 typedef negative_binomial_distribution distribution_type; 734 735 explicit param_type(result_type k = 1, double p = 0.5); 736 737 result_type k() const; 738 double p() const; 739 740 friend bool operator==(const param_type& x, const param_type& y); 741 friend bool operator!=(const param_type& x, const param_type& y); 742 }; 743 744 // constructor and reset functions 745 explicit negative_binomial_distribution(result_type k = 1, double p = 0.5); 746 explicit negative_binomial_distribution(const param_type& parm); 747 void reset(); 748 749 // generating functions 750 template<class URNG> result_type operator()(URNG& g); 751 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 752 753 // property functions 754 result_type k() const; 755 double p() const; 756 757 param_type param() const; 758 void param(const param_type& parm); 759 760 result_type min() const; 761 result_type max() const; 762 763 friend bool operator==(const negative_binomial_distribution& x, 764 const negative_binomial_distribution& y); 765 friend bool operator!=(const negative_binomial_distribution& x, 766 const negative_binomial_distribution& y); 767 768 template <class charT, class traits> 769 friend 770 basic_ostream<charT, traits>& 771 operator<<(basic_ostream<charT, traits>& os, 772 const negative_binomial_distribution& x); 773 774 template <class charT, class traits> 775 friend 776 basic_istream<charT, traits>& 777 operator>>(basic_istream<charT, traits>& is, 778 negative_binomial_distribution& x); 779}; 780 781template<class IntType = int> 782class poisson_distribution 783{ 784public: 785 // types 786 typedef IntType result_type; 787 788 class param_type 789 { 790 public: 791 typedef poisson_distribution distribution_type; 792 793 explicit param_type(double mean = 1.0); 794 795 double mean() const; 796 797 friend bool operator==(const param_type& x, const param_type& y); 798 friend bool operator!=(const param_type& x, const param_type& y); 799 }; 800 801 // constructors and reset functions 802 explicit poisson_distribution(double mean = 1.0); 803 explicit poisson_distribution(const param_type& parm); 804 void reset(); 805 806 // generating functions 807 template<class URNG> result_type operator()(URNG& g); 808 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 809 810 // property functions 811 double mean() const; 812 813 param_type param() const; 814 void param(const param_type& parm); 815 816 result_type min() const; 817 result_type max() const; 818 819 friend bool operator==(const poisson_distribution& x, 820 const poisson_distribution& y); 821 friend bool operator!=(const poisson_distribution& x, 822 const poisson_distribution& y); 823 824 template <class charT, class traits> 825 friend 826 basic_ostream<charT, traits>& 827 operator<<(basic_ostream<charT, traits>& os, 828 const poisson_distribution& x); 829 830 template <class charT, class traits> 831 friend 832 basic_istream<charT, traits>& 833 operator>>(basic_istream<charT, traits>& is, 834 poisson_distribution& x); 835}; 836 837template<class RealType = double> 838class exponential_distribution 839{ 840public: 841 // types 842 typedef RealType result_type; 843 844 class param_type 845 { 846 public: 847 typedef exponential_distribution distribution_type; 848 849 explicit param_type(result_type lambda = 1.0); 850 851 result_type lambda() const; 852 853 friend bool operator==(const param_type& x, const param_type& y); 854 friend bool operator!=(const param_type& x, const param_type& y); 855 }; 856 857 // constructors and reset functions 858 explicit exponential_distribution(result_type lambda = 1.0); 859 explicit exponential_distribution(const param_type& parm); 860 void reset(); 861 862 // generating functions 863 template<class URNG> result_type operator()(URNG& g); 864 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 865 866 // property functions 867 result_type lambda() const; 868 869 param_type param() const; 870 void param(const param_type& parm); 871 872 result_type min() const; 873 result_type max() const; 874 875 friend bool operator==(const exponential_distribution& x, 876 const exponential_distribution& y); 877 friend bool operator!=(const exponential_distribution& x, 878 const exponential_distribution& y); 879 880 template <class charT, class traits> 881 friend 882 basic_ostream<charT, traits>& 883 operator<<(basic_ostream<charT, traits>& os, 884 const exponential_distribution& x); 885 886 template <class charT, class traits> 887 friend 888 basic_istream<charT, traits>& 889 operator>>(basic_istream<charT, traits>& is, 890 exponential_distribution& x); 891}; 892 893template<class RealType = double> 894class gamma_distribution 895{ 896public: 897 // types 898 typedef RealType result_type; 899 900 class param_type 901 { 902 public: 903 typedef gamma_distribution distribution_type; 904 905 explicit param_type(result_type alpha = 1, result_type beta = 1); 906 907 result_type alpha() const; 908 result_type beta() const; 909 910 friend bool operator==(const param_type& x, const param_type& y); 911 friend bool operator!=(const param_type& x, const param_type& y); 912 }; 913 914 // constructors and reset functions 915 explicit gamma_distribution(result_type alpha = 1, result_type beta = 1); 916 explicit gamma_distribution(const param_type& parm); 917 void reset(); 918 919 // generating functions 920 template<class URNG> result_type operator()(URNG& g); 921 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 922 923 // property functions 924 result_type alpha() const; 925 result_type beta() const; 926 927 param_type param() const; 928 void param(const param_type& parm); 929 930 result_type min() const; 931 result_type max() const; 932 933 friend bool operator==(const gamma_distribution& x, 934 const gamma_distribution& y); 935 friend bool operator!=(const gamma_distribution& x, 936 const gamma_distribution& y); 937 938 template <class charT, class traits> 939 friend 940 basic_ostream<charT, traits>& 941 operator<<(basic_ostream<charT, traits>& os, 942 const gamma_distribution& x); 943 944 template <class charT, class traits> 945 friend 946 basic_istream<charT, traits>& 947 operator>>(basic_istream<charT, traits>& is, 948 gamma_distribution& x); 949}; 950 951template<class RealType = double> 952class weibull_distribution 953{ 954public: 955 // types 956 typedef RealType result_type; 957 958 class param_type 959 { 960 public: 961 typedef weibull_distribution distribution_type; 962 963 explicit param_type(result_type alpha = 1, result_type beta = 1); 964 965 result_type a() const; 966 result_type b() const; 967 968 friend bool operator==(const param_type& x, const param_type& y); 969 friend bool operator!=(const param_type& x, const param_type& y); 970 }; 971 972 // constructor and reset functions 973 explicit weibull_distribution(result_type a = 1, result_type b = 1); 974 explicit weibull_distribution(const param_type& parm); 975 void reset(); 976 977 // generating functions 978 template<class URNG> result_type operator()(URNG& g); 979 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 980 981 // property functions 982 result_type a() const; 983 result_type b() const; 984 985 param_type param() const; 986 void param(const param_type& parm); 987 988 result_type min() const; 989 result_type max() const; 990 991 friend bool operator==(const weibull_distribution& x, 992 const weibull_distribution& y); 993 friend bool operator!=(const weibull_distribution& x, 994 const weibull_distribution& y); 995 996 template <class charT, class traits> 997 friend 998 basic_ostream<charT, traits>& 999 operator<<(basic_ostream<charT, traits>& os, 1000 const weibull_distribution& x); 1001 1002 template <class charT, class traits> 1003 friend 1004 basic_istream<charT, traits>& 1005 operator>>(basic_istream<charT, traits>& is, 1006 weibull_distribution& x); 1007}; 1008 1009template<class RealType = double> 1010class extreme_value_distribution 1011{ 1012public: 1013 // types 1014 typedef RealType result_type; 1015 1016 class param_type 1017 { 1018 public: 1019 typedef extreme_value_distribution distribution_type; 1020 1021 explicit param_type(result_type a = 0, result_type b = 1); 1022 1023 result_type a() const; 1024 result_type b() const; 1025 1026 friend bool operator==(const param_type& x, const param_type& y); 1027 friend bool operator!=(const param_type& x, const param_type& y); 1028 }; 1029 1030 // constructor and reset functions 1031 explicit extreme_value_distribution(result_type a = 0, result_type b = 1); 1032 explicit extreme_value_distribution(const param_type& parm); 1033 void reset(); 1034 1035 // generating functions 1036 template<class URNG> result_type operator()(URNG& g); 1037 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1038 1039 // property functions 1040 result_type a() const; 1041 result_type b() const; 1042 1043 param_type param() const; 1044 void param(const param_type& parm); 1045 1046 result_type min() const; 1047 result_type max() const; 1048 1049 friend bool operator==(const extreme_value_distribution& x, 1050 const extreme_value_distribution& y); 1051 friend bool operator!=(const extreme_value_distribution& x, 1052 const extreme_value_distribution& y); 1053 1054 template <class charT, class traits> 1055 friend 1056 basic_ostream<charT, traits>& 1057 operator<<(basic_ostream<charT, traits>& os, 1058 const extreme_value_distribution& x); 1059 1060 template <class charT, class traits> 1061 friend 1062 basic_istream<charT, traits>& 1063 operator>>(basic_istream<charT, traits>& is, 1064 extreme_value_distribution& x); 1065}; 1066 1067template<class RealType = double> 1068class normal_distribution 1069{ 1070public: 1071 // types 1072 typedef RealType result_type; 1073 1074 class param_type 1075 { 1076 public: 1077 typedef normal_distribution distribution_type; 1078 1079 explicit param_type(result_type mean = 0, result_type stddev = 1); 1080 1081 result_type mean() const; 1082 result_type stddev() const; 1083 1084 friend bool operator==(const param_type& x, const param_type& y); 1085 friend bool operator!=(const param_type& x, const param_type& y); 1086 }; 1087 1088 // constructors and reset functions 1089 explicit normal_distribution(result_type mean = 0, result_type stddev = 1); 1090 explicit normal_distribution(const param_type& parm); 1091 void reset(); 1092 1093 // generating functions 1094 template<class URNG> result_type operator()(URNG& g); 1095 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1096 1097 // property functions 1098 result_type mean() const; 1099 result_type stddev() const; 1100 1101 param_type param() const; 1102 void param(const param_type& parm); 1103 1104 result_type min() const; 1105 result_type max() const; 1106 1107 friend bool operator==(const normal_distribution& x, 1108 const normal_distribution& y); 1109 friend bool operator!=(const normal_distribution& x, 1110 const normal_distribution& y); 1111 1112 template <class charT, class traits> 1113 friend 1114 basic_ostream<charT, traits>& 1115 operator<<(basic_ostream<charT, traits>& os, 1116 const normal_distribution& x); 1117 1118 template <class charT, class traits> 1119 friend 1120 basic_istream<charT, traits>& 1121 operator>>(basic_istream<charT, traits>& is, 1122 normal_distribution& x); 1123}; 1124 1125template<class RealType = double> 1126class lognormal_distribution 1127{ 1128public: 1129 // types 1130 typedef RealType result_type; 1131 1132 class param_type 1133 { 1134 public: 1135 typedef lognormal_distribution distribution_type; 1136 1137 explicit param_type(result_type m = 0, result_type s = 1); 1138 1139 result_type m() const; 1140 result_type s() const; 1141 1142 friend bool operator==(const param_type& x, const param_type& y); 1143 friend bool operator!=(const param_type& x, const param_type& y); 1144 }; 1145 1146 // constructor and reset functions 1147 explicit lognormal_distribution(result_type m = 0, result_type s = 1); 1148 explicit lognormal_distribution(const param_type& parm); 1149 void reset(); 1150 1151 // generating functions 1152 template<class URNG> result_type operator()(URNG& g); 1153 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1154 1155 // property functions 1156 result_type m() const; 1157 result_type s() const; 1158 1159 param_type param() const; 1160 void param(const param_type& parm); 1161 1162 result_type min() const; 1163 result_type max() const; 1164 1165 friend bool operator==(const lognormal_distribution& x, 1166 const lognormal_distribution& y); 1167 friend bool operator!=(const lognormal_distribution& x, 1168 const lognormal_distribution& y); 1169 1170 template <class charT, class traits> 1171 friend 1172 basic_ostream<charT, traits>& 1173 operator<<(basic_ostream<charT, traits>& os, 1174 const lognormal_distribution& x); 1175 1176 template <class charT, class traits> 1177 friend 1178 basic_istream<charT, traits>& 1179 operator>>(basic_istream<charT, traits>& is, 1180 lognormal_distribution& x); 1181}; 1182 1183template<class RealType = double> 1184class chi_squared_distribution 1185{ 1186public: 1187 // types 1188 typedef RealType result_type; 1189 1190 class param_type 1191 { 1192 public: 1193 typedef chi_squared_distribution distribution_type; 1194 1195 explicit param_type(result_type n = 1); 1196 1197 result_type n() const; 1198 1199 friend bool operator==(const param_type& x, const param_type& y); 1200 friend bool operator!=(const param_type& x, const param_type& y); 1201 }; 1202 1203 // constructor and reset functions 1204 explicit chi_squared_distribution(result_type n = 1); 1205 explicit chi_squared_distribution(const param_type& parm); 1206 void reset(); 1207 1208 // generating functions 1209 template<class URNG> result_type operator()(URNG& g); 1210 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1211 1212 // property functions 1213 result_type n() const; 1214 1215 param_type param() const; 1216 void param(const param_type& parm); 1217 1218 result_type min() const; 1219 result_type max() const; 1220 1221 friend bool operator==(const chi_squared_distribution& x, 1222 const chi_squared_distribution& y); 1223 friend bool operator!=(const chi_squared_distribution& x, 1224 const chi_squared_distribution& y); 1225 1226 template <class charT, class traits> 1227 friend 1228 basic_ostream<charT, traits>& 1229 operator<<(basic_ostream<charT, traits>& os, 1230 const chi_squared_distribution& x); 1231 1232 template <class charT, class traits> 1233 friend 1234 basic_istream<charT, traits>& 1235 operator>>(basic_istream<charT, traits>& is, 1236 chi_squared_distribution& x); 1237}; 1238 1239template<class RealType = double> 1240class cauchy_distribution 1241{ 1242public: 1243 // types 1244 typedef RealType result_type; 1245 1246 class param_type 1247 { 1248 public: 1249 typedef cauchy_distribution distribution_type; 1250 1251 explicit param_type(result_type a = 0, result_type b = 1); 1252 1253 result_type a() const; 1254 result_type b() const; 1255 1256 friend bool operator==(const param_type& x, const param_type& y); 1257 friend bool operator!=(const param_type& x, const param_type& y); 1258 }; 1259 1260 // constructor and reset functions 1261 explicit cauchy_distribution(result_type a = 0, result_type b = 1); 1262 explicit cauchy_distribution(const param_type& parm); 1263 void reset(); 1264 1265 // generating functions 1266 template<class URNG> result_type operator()(URNG& g); 1267 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1268 1269 // property functions 1270 result_type a() const; 1271 result_type b() const; 1272 1273 param_type param() const; 1274 void param(const param_type& parm); 1275 1276 result_type min() const; 1277 result_type max() const; 1278 1279 friend bool operator==(const cauchy_distribution& x, 1280 const cauchy_distribution& y); 1281 friend bool operator!=(const cauchy_distribution& x, 1282 const cauchy_distribution& y); 1283 1284 template <class charT, class traits> 1285 friend 1286 basic_ostream<charT, traits>& 1287 operator<<(basic_ostream<charT, traits>& os, 1288 const cauchy_distribution& x); 1289 1290 template <class charT, class traits> 1291 friend 1292 basic_istream<charT, traits>& 1293 operator>>(basic_istream<charT, traits>& is, 1294 cauchy_distribution& x); 1295}; 1296 1297template<class RealType = double> 1298class fisher_f_distribution 1299{ 1300public: 1301 // types 1302 typedef RealType result_type; 1303 1304 class param_type 1305 { 1306 public: 1307 typedef fisher_f_distribution distribution_type; 1308 1309 explicit param_type(result_type m = 1, result_type n = 1); 1310 1311 result_type m() const; 1312 result_type n() const; 1313 1314 friend bool operator==(const param_type& x, const param_type& y); 1315 friend bool operator!=(const param_type& x, const param_type& y); 1316 }; 1317 1318 // constructor and reset functions 1319 explicit fisher_f_distribution(result_type m = 1, result_type n = 1); 1320 explicit fisher_f_distribution(const param_type& parm); 1321 void reset(); 1322 1323 // generating functions 1324 template<class URNG> result_type operator()(URNG& g); 1325 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1326 1327 // property functions 1328 result_type m() const; 1329 result_type n() const; 1330 1331 param_type param() const; 1332 void param(const param_type& parm); 1333 1334 result_type min() const; 1335 result_type max() const; 1336 1337 friend bool operator==(const fisher_f_distribution& x, 1338 const fisher_f_distribution& y); 1339 friend bool operator!=(const fisher_f_distribution& x, 1340 const fisher_f_distribution& y); 1341 1342 template <class charT, class traits> 1343 friend 1344 basic_ostream<charT, traits>& 1345 operator<<(basic_ostream<charT, traits>& os, 1346 const fisher_f_distribution& x); 1347 1348 template <class charT, class traits> 1349 friend 1350 basic_istream<charT, traits>& 1351 operator>>(basic_istream<charT, traits>& is, 1352 fisher_f_distribution& x); 1353}; 1354 1355template<class RealType = double> 1356class student_t_distribution 1357{ 1358public: 1359 // types 1360 typedef RealType result_type; 1361 1362 class param_type 1363 { 1364 public: 1365 typedef student_t_distribution distribution_type; 1366 1367 explicit param_type(result_type n = 1); 1368 1369 result_type n() const; 1370 1371 friend bool operator==(const param_type& x, const param_type& y); 1372 friend bool operator!=(const param_type& x, const param_type& y); 1373 }; 1374 1375 // constructor and reset functions 1376 explicit student_t_distribution(result_type n = 1); 1377 explicit student_t_distribution(const param_type& parm); 1378 void reset(); 1379 1380 // generating functions 1381 template<class URNG> result_type operator()(URNG& g); 1382 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1383 1384 // property functions 1385 result_type n() const; 1386 1387 param_type param() const; 1388 void param(const param_type& parm); 1389 1390 result_type min() const; 1391 result_type max() const; 1392 1393 friend bool operator==(const student_t_distribution& x, 1394 const student_t_distribution& y); 1395 friend bool operator!=(const student_t_distribution& x, 1396 const student_t_distribution& y); 1397 1398 template <class charT, class traits> 1399 friend 1400 basic_ostream<charT, traits>& 1401 operator<<(basic_ostream<charT, traits>& os, 1402 const student_t_distribution& x); 1403 1404 template <class charT, class traits> 1405 friend 1406 basic_istream<charT, traits>& 1407 operator>>(basic_istream<charT, traits>& is, 1408 student_t_distribution& x); 1409}; 1410 1411template<class IntType = int> 1412class discrete_distribution 1413{ 1414public: 1415 // types 1416 typedef IntType result_type; 1417 1418 class param_type 1419 { 1420 public: 1421 typedef discrete_distribution distribution_type; 1422 1423 param_type(); 1424 template<class InputIterator> 1425 param_type(InputIterator firstW, InputIterator lastW); 1426 param_type(initializer_list<double> wl); 1427 template<class UnaryOperation> 1428 param_type(size_t nw, double xmin, double xmax, UnaryOperation fw); 1429 1430 vector<double> probabilities() const; 1431 1432 friend bool operator==(const param_type& x, const param_type& y); 1433 friend bool operator!=(const param_type& x, const param_type& y); 1434 }; 1435 1436 // constructor and reset functions 1437 discrete_distribution(); 1438 template<class InputIterator> 1439 discrete_distribution(InputIterator firstW, InputIterator lastW); 1440 discrete_distribution(initializer_list<double> wl); 1441 template<class UnaryOperation> 1442 discrete_distribution(size_t nw, double xmin, double xmax, 1443 UnaryOperation fw); 1444 explicit discrete_distribution(const param_type& parm); 1445 void reset(); 1446 1447 // generating functions 1448 template<class URNG> result_type operator()(URNG& g); 1449 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1450 1451 // property functions 1452 vector<double> probabilities() const; 1453 1454 param_type param() const; 1455 void param(const param_type& parm); 1456 1457 result_type min() const; 1458 result_type max() const; 1459 1460 friend bool operator==(const discrete_distribution& x, 1461 const discrete_distribution& y); 1462 friend bool operator!=(const discrete_distribution& x, 1463 const discrete_distribution& y); 1464 1465 template <class charT, class traits> 1466 friend 1467 basic_ostream<charT, traits>& 1468 operator<<(basic_ostream<charT, traits>& os, 1469 const discrete_distribution& x); 1470 1471 template <class charT, class traits> 1472 friend 1473 basic_istream<charT, traits>& 1474 operator>>(basic_istream<charT, traits>& is, 1475 discrete_distribution& x); 1476}; 1477 1478template<class RealType = double> 1479class piecewise_constant_distribution 1480{ 1481 // types 1482 typedef RealType result_type; 1483 1484 class param_type 1485 { 1486 public: 1487 typedef piecewise_constant_distribution distribution_type; 1488 1489 param_type(); 1490 template<class InputIteratorB, class InputIteratorW> 1491 param_type(InputIteratorB firstB, InputIteratorB lastB, 1492 InputIteratorW firstW); 1493 template<class UnaryOperation> 1494 param_type(initializer_list<result_type> bl, UnaryOperation fw); 1495 template<class UnaryOperation> 1496 param_type(size_t nw, result_type xmin, result_type xmax, 1497 UnaryOperation fw); 1498 1499 vector<result_type> intervals() const; 1500 vector<result_type> densities() const; 1501 1502 friend bool operator==(const param_type& x, const param_type& y); 1503 friend bool operator!=(const param_type& x, const param_type& y); 1504 }; 1505 1506 // constructor and reset functions 1507 piecewise_constant_distribution(); 1508 template<class InputIteratorB, class InputIteratorW> 1509 piecewise_constant_distribution(InputIteratorB firstB, 1510 InputIteratorB lastB, 1511 InputIteratorW firstW); 1512 template<class UnaryOperation> 1513 piecewise_constant_distribution(initializer_list<result_type> bl, 1514 UnaryOperation fw); 1515 template<class UnaryOperation> 1516 piecewise_constant_distribution(size_t nw, result_type xmin, 1517 result_type xmax, UnaryOperation fw); 1518 explicit piecewise_constant_distribution(const param_type& parm); 1519 void reset(); 1520 1521 // generating functions 1522 template<class URNG> result_type operator()(URNG& g); 1523 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1524 1525 // property functions 1526 vector<result_type> intervals() const; 1527 vector<result_type> densities() const; 1528 1529 param_type param() const; 1530 void param(const param_type& parm); 1531 1532 result_type min() const; 1533 result_type max() const; 1534 1535 friend bool operator==(const piecewise_constant_distribution& x, 1536 const piecewise_constant_distribution& y); 1537 friend bool operator!=(const piecewise_constant_distribution& x, 1538 const piecewise_constant_distribution& y); 1539 1540 template <class charT, class traits> 1541 friend 1542 basic_ostream<charT, traits>& 1543 operator<<(basic_ostream<charT, traits>& os, 1544 const piecewise_constant_distribution& x); 1545 1546 template <class charT, class traits> 1547 friend 1548 basic_istream<charT, traits>& 1549 operator>>(basic_istream<charT, traits>& is, 1550 piecewise_constant_distribution& x); 1551}; 1552 1553template<class RealType = double> 1554class piecewise_linear_distribution 1555{ 1556 // types 1557 typedef RealType result_type; 1558 1559 class param_type 1560 { 1561 public: 1562 typedef piecewise_linear_distribution distribution_type; 1563 1564 param_type(); 1565 template<class InputIteratorB, class InputIteratorW> 1566 param_type(InputIteratorB firstB, InputIteratorB lastB, 1567 InputIteratorW firstW); 1568 template<class UnaryOperation> 1569 param_type(initializer_list<result_type> bl, UnaryOperation fw); 1570 template<class UnaryOperation> 1571 param_type(size_t nw, result_type xmin, result_type xmax, 1572 UnaryOperation fw); 1573 1574 vector<result_type> intervals() const; 1575 vector<result_type> densities() const; 1576 1577 friend bool operator==(const param_type& x, const param_type& y); 1578 friend bool operator!=(const param_type& x, const param_type& y); 1579 }; 1580 1581 // constructor and reset functions 1582 piecewise_linear_distribution(); 1583 template<class InputIteratorB, class InputIteratorW> 1584 piecewise_linear_distribution(InputIteratorB firstB, 1585 InputIteratorB lastB, 1586 InputIteratorW firstW); 1587 1588 template<class UnaryOperation> 1589 piecewise_linear_distribution(initializer_list<result_type> bl, 1590 UnaryOperation fw); 1591 1592 template<class UnaryOperation> 1593 piecewise_linear_distribution(size_t nw, result_type xmin, 1594 result_type xmax, UnaryOperation fw); 1595 1596 explicit piecewise_linear_distribution(const param_type& parm); 1597 void reset(); 1598 1599 // generating functions 1600 template<class URNG> result_type operator()(URNG& g); 1601 template<class URNG> result_type operator()(URNG& g, const param_type& parm); 1602 1603 // property functions 1604 vector<result_type> intervals() const; 1605 vector<result_type> densities() const; 1606 1607 param_type param() const; 1608 void param(const param_type& parm); 1609 1610 result_type min() const; 1611 result_type max() const; 1612 1613 friend bool operator==(const piecewise_linear_distribution& x, 1614 const piecewise_linear_distribution& y); 1615 friend bool operator!=(const piecewise_linear_distribution& x, 1616 const piecewise_linear_distribution& y); 1617 1618 template <class charT, class traits> 1619 friend 1620 basic_ostream<charT, traits>& 1621 operator<<(basic_ostream<charT, traits>& os, 1622 const piecewise_linear_distribution& x); 1623 1624 template <class charT, class traits> 1625 friend 1626 basic_istream<charT, traits>& 1627 operator>>(basic_istream<charT, traits>& is, 1628 piecewise_linear_distribution& x); 1629}; 1630 1631} // std 1632*/ 1633 1634#include <__config> 1635#include <cstddef> 1636#include <cstdint> 1637#include <cmath> 1638#include <type_traits> 1639#include <initializer_list> 1640#include <limits> 1641#include <algorithm> 1642#include <numeric> 1643#include <vector> 1644#include <string> 1645#include <istream> 1646#include <ostream> 1647 1648#if !defined(_LIBCPP_HAS_NO_PRAGMA_SYSTEM_HEADER) 1649#pragma GCC system_header 1650#endif 1651 1652_LIBCPP_PUSH_MACROS 1653#include <__undef_macros> 1654 1655 1656_LIBCPP_BEGIN_NAMESPACE_STD 1657 1658// __is_seed_sequence 1659 1660template <class _Sseq, class _Engine> 1661struct __is_seed_sequence 1662{ 1663 static _LIBCPP_CONSTEXPR const bool value = 1664 !is_convertible<_Sseq, typename _Engine::result_type>::value && 1665 !is_same<typename remove_cv<_Sseq>::type, _Engine>::value; 1666}; 1667 1668// linear_congruential_engine 1669 1670template <unsigned long long __a, unsigned long long __c, 1671 unsigned long long __m, unsigned long long _Mp, 1672 bool _MightOverflow = (__a != 0 && __m != 0 && __m-1 > (_Mp-__c)/__a)> 1673struct __lce_ta; 1674 1675// 64 1676 1677template <unsigned long long __a, unsigned long long __c, unsigned long long __m> 1678struct __lce_ta<__a, __c, __m, (unsigned long long)(~0), true> 1679{ 1680 typedef unsigned long long result_type; 1681 _LIBCPP_INLINE_VISIBILITY 1682 static result_type next(result_type __x) 1683 { 1684 // Schrage's algorithm 1685 const result_type __q = __m / __a; 1686 const result_type __r = __m % __a; 1687 const result_type __t0 = __a * (__x % __q); 1688 const result_type __t1 = __r * (__x / __q); 1689 __x = __t0 + (__t0 < __t1) * __m - __t1; 1690 __x += __c - (__x >= __m - __c) * __m; 1691 return __x; 1692 } 1693}; 1694 1695template <unsigned long long __a, unsigned long long __m> 1696struct __lce_ta<__a, 0, __m, (unsigned long long)(~0), true> 1697{ 1698 typedef unsigned long long result_type; 1699 _LIBCPP_INLINE_VISIBILITY 1700 static result_type next(result_type __x) 1701 { 1702 // Schrage's algorithm 1703 const result_type __q = __m / __a; 1704 const result_type __r = __m % __a; 1705 const result_type __t0 = __a * (__x % __q); 1706 const result_type __t1 = __r * (__x / __q); 1707 __x = __t0 + (__t0 < __t1) * __m - __t1; 1708 return __x; 1709 } 1710}; 1711 1712template <unsigned long long __a, unsigned long long __c, unsigned long long __m> 1713struct __lce_ta<__a, __c, __m, (unsigned long long)(~0), false> 1714{ 1715 typedef unsigned long long result_type; 1716 _LIBCPP_INLINE_VISIBILITY 1717 static result_type next(result_type __x) 1718 { 1719 return (__a * __x + __c) % __m; 1720 } 1721}; 1722 1723template <unsigned long long __a, unsigned long long __c> 1724struct __lce_ta<__a, __c, 0, (unsigned long long)(~0), false> 1725{ 1726 typedef unsigned long long result_type; 1727 _LIBCPP_INLINE_VISIBILITY 1728 static result_type next(result_type __x) 1729 { 1730 return __a * __x + __c; 1731 } 1732}; 1733 1734// 32 1735 1736template <unsigned long long _Ap, unsigned long long _Cp, unsigned long long _Mp> 1737struct __lce_ta<_Ap, _Cp, _Mp, unsigned(~0), true> 1738{ 1739 typedef unsigned result_type; 1740 _LIBCPP_INLINE_VISIBILITY 1741 static result_type next(result_type __x) 1742 { 1743 const result_type __a = static_cast<result_type>(_Ap); 1744 const result_type __c = static_cast<result_type>(_Cp); 1745 const result_type __m = static_cast<result_type>(_Mp); 1746 // Schrage's algorithm 1747 const result_type __q = __m / __a; 1748 const result_type __r = __m % __a; 1749 const result_type __t0 = __a * (__x % __q); 1750 const result_type __t1 = __r * (__x / __q); 1751 __x = __t0 + (__t0 < __t1) * __m - __t1; 1752 __x += __c - (__x >= __m - __c) * __m; 1753 return __x; 1754 } 1755}; 1756 1757template <unsigned long long _Ap, unsigned long long _Mp> 1758struct __lce_ta<_Ap, 0, _Mp, unsigned(~0), true> 1759{ 1760 typedef unsigned result_type; 1761 _LIBCPP_INLINE_VISIBILITY 1762 static result_type next(result_type __x) 1763 { 1764 const result_type __a = static_cast<result_type>(_Ap); 1765 const result_type __m = static_cast<result_type>(_Mp); 1766 // Schrage's algorithm 1767 const result_type __q = __m / __a; 1768 const result_type __r = __m % __a; 1769 const result_type __t0 = __a * (__x % __q); 1770 const result_type __t1 = __r * (__x / __q); 1771 __x = __t0 + (__t0 < __t1) * __m - __t1; 1772 return __x; 1773 } 1774}; 1775 1776template <unsigned long long _Ap, unsigned long long _Cp, unsigned long long _Mp> 1777struct __lce_ta<_Ap, _Cp, _Mp, unsigned(~0), false> 1778{ 1779 typedef unsigned result_type; 1780 _LIBCPP_INLINE_VISIBILITY 1781 static result_type next(result_type __x) 1782 { 1783 const result_type __a = static_cast<result_type>(_Ap); 1784 const result_type __c = static_cast<result_type>(_Cp); 1785 const result_type __m = static_cast<result_type>(_Mp); 1786 return (__a * __x + __c) % __m; 1787 } 1788}; 1789 1790template <unsigned long long _Ap, unsigned long long _Cp> 1791struct __lce_ta<_Ap, _Cp, 0, unsigned(~0), false> 1792{ 1793 typedef unsigned result_type; 1794 _LIBCPP_INLINE_VISIBILITY 1795 static result_type next(result_type __x) 1796 { 1797 const result_type __a = static_cast<result_type>(_Ap); 1798 const result_type __c = static_cast<result_type>(_Cp); 1799 return __a * __x + __c; 1800 } 1801}; 1802 1803// 16 1804 1805template <unsigned long long __a, unsigned long long __c, unsigned long long __m, bool __b> 1806struct __lce_ta<__a, __c, __m, (unsigned short)(~0), __b> 1807{ 1808 typedef unsigned short result_type; 1809 _LIBCPP_INLINE_VISIBILITY 1810 static result_type next(result_type __x) 1811 { 1812 return static_cast<result_type>(__lce_ta<__a, __c, __m, unsigned(~0)>::next(__x)); 1813 } 1814}; 1815 1816template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1817class _LIBCPP_TEMPLATE_VIS linear_congruential_engine; 1818 1819template <class _CharT, class _Traits, 1820 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1821_LIBCPP_INLINE_VISIBILITY 1822basic_ostream<_CharT, _Traits>& 1823operator<<(basic_ostream<_CharT, _Traits>& __os, 1824 const linear_congruential_engine<_Up, _Ap, _Cp, _Np>&); 1825 1826template <class _CharT, class _Traits, 1827 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1828basic_istream<_CharT, _Traits>& 1829operator>>(basic_istream<_CharT, _Traits>& __is, 1830 linear_congruential_engine<_Up, _Ap, _Cp, _Np>& __x); 1831 1832template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1833class _LIBCPP_TEMPLATE_VIS linear_congruential_engine 1834{ 1835public: 1836 // types 1837 typedef _UIntType result_type; 1838 1839private: 1840 result_type __x_; 1841 1842 static _LIBCPP_CONSTEXPR const result_type _Mp = result_type(~0); 1843 1844 static_assert(__m == 0 || __a < __m, "linear_congruential_engine invalid parameters"); 1845 static_assert(__m == 0 || __c < __m, "linear_congruential_engine invalid parameters"); 1846public: 1847 static _LIBCPP_CONSTEXPR const result_type _Min = __c == 0u ? 1u: 0u; 1848 static _LIBCPP_CONSTEXPR const result_type _Max = __m - 1u; 1849 static_assert(_Min < _Max, "linear_congruential_engine invalid parameters"); 1850 1851 // engine characteristics 1852 static _LIBCPP_CONSTEXPR const result_type multiplier = __a; 1853 static _LIBCPP_CONSTEXPR const result_type increment = __c; 1854 static _LIBCPP_CONSTEXPR const result_type modulus = __m; 1855 _LIBCPP_INLINE_VISIBILITY 1856 static _LIBCPP_CONSTEXPR result_type min() {return _Min;} 1857 _LIBCPP_INLINE_VISIBILITY 1858 static _LIBCPP_CONSTEXPR result_type max() {return _Max;} 1859 static _LIBCPP_CONSTEXPR const result_type default_seed = 1u; 1860 1861 // constructors and seeding functions 1862 _LIBCPP_INLINE_VISIBILITY 1863 explicit linear_congruential_engine(result_type __s = default_seed) 1864 {seed(__s);} 1865 template<class _Sseq> 1866 _LIBCPP_INLINE_VISIBILITY 1867 explicit linear_congruential_engine(_Sseq& __q, 1868 typename enable_if<__is_seed_sequence<_Sseq, linear_congruential_engine>::value>::type* = 0) 1869 {seed(__q);} 1870 _LIBCPP_INLINE_VISIBILITY 1871 void seed(result_type __s = default_seed) 1872 {seed(integral_constant<bool, __m == 0>(), 1873 integral_constant<bool, __c == 0>(), __s);} 1874 template<class _Sseq> 1875 _LIBCPP_INLINE_VISIBILITY 1876 typename enable_if 1877 < 1878 __is_seed_sequence<_Sseq, linear_congruential_engine>::value, 1879 void 1880 >::type 1881 seed(_Sseq& __q) 1882 {__seed(__q, integral_constant<unsigned, 1883 1 + (__m == 0 ? (sizeof(result_type) * __CHAR_BIT__ - 1)/32 1884 : (__m > 0x100000000ull))>());} 1885 1886 // generating functions 1887 _LIBCPP_INLINE_VISIBILITY 1888 result_type operator()() 1889 {return __x_ = static_cast<result_type>(__lce_ta<__a, __c, __m, _Mp>::next(__x_));} 1890 _LIBCPP_INLINE_VISIBILITY 1891 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 1892 1893 friend _LIBCPP_INLINE_VISIBILITY 1894 bool operator==(const linear_congruential_engine& __x, 1895 const linear_congruential_engine& __y) 1896 {return __x.__x_ == __y.__x_;} 1897 friend _LIBCPP_INLINE_VISIBILITY 1898 bool operator!=(const linear_congruential_engine& __x, 1899 const linear_congruential_engine& __y) 1900 {return !(__x == __y);} 1901 1902private: 1903 1904 _LIBCPP_INLINE_VISIBILITY 1905 void seed(true_type, true_type, result_type __s) {__x_ = __s == 0 ? 1 : __s;} 1906 _LIBCPP_INLINE_VISIBILITY 1907 void seed(true_type, false_type, result_type __s) {__x_ = __s;} 1908 _LIBCPP_INLINE_VISIBILITY 1909 void seed(false_type, true_type, result_type __s) {__x_ = __s % __m == 0 ? 1910 1 : __s % __m;} 1911 _LIBCPP_INLINE_VISIBILITY 1912 void seed(false_type, false_type, result_type __s) {__x_ = __s % __m;} 1913 1914 template<class _Sseq> 1915 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 1916 template<class _Sseq> 1917 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 1918 1919 template <class _CharT, class _Traits, 1920 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1921 friend 1922 basic_ostream<_CharT, _Traits>& 1923 operator<<(basic_ostream<_CharT, _Traits>& __os, 1924 const linear_congruential_engine<_Up, _Ap, _Cp, _Np>&); 1925 1926 template <class _CharT, class _Traits, 1927 class _Up, _Up _Ap, _Up _Cp, _Up _Np> 1928 friend 1929 basic_istream<_CharT, _Traits>& 1930 operator>>(basic_istream<_CharT, _Traits>& __is, 1931 linear_congruential_engine<_Up, _Ap, _Cp, _Np>& __x); 1932}; 1933 1934template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1935 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1936 linear_congruential_engine<_UIntType, __a, __c, __m>::multiplier; 1937 1938template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1939 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1940 linear_congruential_engine<_UIntType, __a, __c, __m>::increment; 1941 1942template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1943 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1944 linear_congruential_engine<_UIntType, __a, __c, __m>::modulus; 1945 1946template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1947 _LIBCPP_CONSTEXPR const typename linear_congruential_engine<_UIntType, __a, __c, __m>::result_type 1948 linear_congruential_engine<_UIntType, __a, __c, __m>::default_seed; 1949 1950template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1951template<class _Sseq> 1952void 1953linear_congruential_engine<_UIntType, __a, __c, __m>::__seed(_Sseq& __q, 1954 integral_constant<unsigned, 1>) 1955{ 1956 const unsigned __k = 1; 1957 uint32_t __ar[__k+3]; 1958 __q.generate(__ar, __ar + __k + 3); 1959 result_type __s = static_cast<result_type>(__ar[3] % __m); 1960 __x_ = __c == 0 && __s == 0 ? result_type(1) : __s; 1961} 1962 1963template <class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1964template<class _Sseq> 1965void 1966linear_congruential_engine<_UIntType, __a, __c, __m>::__seed(_Sseq& __q, 1967 integral_constant<unsigned, 2>) 1968{ 1969 const unsigned __k = 2; 1970 uint32_t __ar[__k+3]; 1971 __q.generate(__ar, __ar + __k + 3); 1972 result_type __s = static_cast<result_type>((__ar[3] + 1973 ((uint64_t)__ar[4] << 32)) % __m); 1974 __x_ = __c == 0 && __s == 0 ? result_type(1) : __s; 1975} 1976 1977template <class _CharT, class _Traits, 1978 class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1979inline _LIBCPP_INLINE_VISIBILITY 1980basic_ostream<_CharT, _Traits>& 1981operator<<(basic_ostream<_CharT, _Traits>& __os, 1982 const linear_congruential_engine<_UIntType, __a, __c, __m>& __x) 1983{ 1984 __save_flags<_CharT, _Traits> __lx(__os); 1985 __os.flags(ios_base::dec | ios_base::left); 1986 __os.fill(__os.widen(' ')); 1987 return __os << __x.__x_; 1988} 1989 1990template <class _CharT, class _Traits, 1991 class _UIntType, _UIntType __a, _UIntType __c, _UIntType __m> 1992basic_istream<_CharT, _Traits>& 1993operator>>(basic_istream<_CharT, _Traits>& __is, 1994 linear_congruential_engine<_UIntType, __a, __c, __m>& __x) 1995{ 1996 __save_flags<_CharT, _Traits> __lx(__is); 1997 __is.flags(ios_base::dec | ios_base::skipws); 1998 _UIntType __t; 1999 __is >> __t; 2000 if (!__is.fail()) 2001 __x.__x_ = __t; 2002 return __is; 2003} 2004 2005typedef linear_congruential_engine<uint_fast32_t, 16807, 0, 2147483647> 2006 minstd_rand0; 2007typedef linear_congruential_engine<uint_fast32_t, 48271, 0, 2147483647> 2008 minstd_rand; 2009typedef minstd_rand default_random_engine; 2010// mersenne_twister_engine 2011 2012template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2013 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2014 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2015class _LIBCPP_TEMPLATE_VIS mersenne_twister_engine; 2016 2017template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2018 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2019 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2020bool 2021operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2022 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2023 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2024 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2025 2026template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2027 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2028 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2029_LIBCPP_INLINE_VISIBILITY 2030bool 2031operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2032 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2033 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2034 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2035 2036template <class _CharT, class _Traits, 2037 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2038 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2039 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2040basic_ostream<_CharT, _Traits>& 2041operator<<(basic_ostream<_CharT, _Traits>& __os, 2042 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2043 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2044 2045template <class _CharT, class _Traits, 2046 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2047 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2048 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2049basic_istream<_CharT, _Traits>& 2050operator>>(basic_istream<_CharT, _Traits>& __is, 2051 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2052 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2053 2054template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2055 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2056 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2057class _LIBCPP_TEMPLATE_VIS mersenne_twister_engine 2058{ 2059public: 2060 // types 2061 typedef _UIntType result_type; 2062 2063private: 2064 result_type __x_[__n]; 2065 size_t __i_; 2066 2067 static_assert( 0 < __m, "mersenne_twister_engine invalid parameters"); 2068 static_assert(__m <= __n, "mersenne_twister_engine invalid parameters"); 2069 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 2070 static_assert(__w <= _Dt, "mersenne_twister_engine invalid parameters"); 2071 static_assert( 2 <= __w, "mersenne_twister_engine invalid parameters"); 2072 static_assert(__r <= __w, "mersenne_twister_engine invalid parameters"); 2073 static_assert(__u <= __w, "mersenne_twister_engine invalid parameters"); 2074 static_assert(__s <= __w, "mersenne_twister_engine invalid parameters"); 2075 static_assert(__t <= __w, "mersenne_twister_engine invalid parameters"); 2076 static_assert(__l <= __w, "mersenne_twister_engine invalid parameters"); 2077public: 2078 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 2079 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 2080 (result_type(1) << __w) - result_type(1); 2081 static_assert(_Min < _Max, "mersenne_twister_engine invalid parameters"); 2082 static_assert(__a <= _Max, "mersenne_twister_engine invalid parameters"); 2083 static_assert(__b <= _Max, "mersenne_twister_engine invalid parameters"); 2084 static_assert(__c <= _Max, "mersenne_twister_engine invalid parameters"); 2085 static_assert(__d <= _Max, "mersenne_twister_engine invalid parameters"); 2086 static_assert(__f <= _Max, "mersenne_twister_engine invalid parameters"); 2087 2088 // engine characteristics 2089 static _LIBCPP_CONSTEXPR const size_t word_size = __w; 2090 static _LIBCPP_CONSTEXPR const size_t state_size = __n; 2091 static _LIBCPP_CONSTEXPR const size_t shift_size = __m; 2092 static _LIBCPP_CONSTEXPR const size_t mask_bits = __r; 2093 static _LIBCPP_CONSTEXPR const result_type xor_mask = __a; 2094 static _LIBCPP_CONSTEXPR const size_t tempering_u = __u; 2095 static _LIBCPP_CONSTEXPR const result_type tempering_d = __d; 2096 static _LIBCPP_CONSTEXPR const size_t tempering_s = __s; 2097 static _LIBCPP_CONSTEXPR const result_type tempering_b = __b; 2098 static _LIBCPP_CONSTEXPR const size_t tempering_t = __t; 2099 static _LIBCPP_CONSTEXPR const result_type tempering_c = __c; 2100 static _LIBCPP_CONSTEXPR const size_t tempering_l = __l; 2101 static _LIBCPP_CONSTEXPR const result_type initialization_multiplier = __f; 2102 _LIBCPP_INLINE_VISIBILITY 2103 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 2104 _LIBCPP_INLINE_VISIBILITY 2105 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 2106 static _LIBCPP_CONSTEXPR const result_type default_seed = 5489u; 2107 2108 // constructors and seeding functions 2109 _LIBCPP_INLINE_VISIBILITY 2110 explicit mersenne_twister_engine(result_type __sd = default_seed) 2111 {seed(__sd);} 2112 template<class _Sseq> 2113 _LIBCPP_INLINE_VISIBILITY 2114 explicit mersenne_twister_engine(_Sseq& __q, 2115 typename enable_if<__is_seed_sequence<_Sseq, mersenne_twister_engine>::value>::type* = 0) 2116 {seed(__q);} 2117 void seed(result_type __sd = default_seed); 2118 template<class _Sseq> 2119 _LIBCPP_INLINE_VISIBILITY 2120 typename enable_if 2121 < 2122 __is_seed_sequence<_Sseq, mersenne_twister_engine>::value, 2123 void 2124 >::type 2125 seed(_Sseq& __q) 2126 {__seed(__q, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2127 2128 // generating functions 2129 result_type operator()(); 2130 _LIBCPP_INLINE_VISIBILITY 2131 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2132 2133 template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2134 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2135 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2136 friend 2137 bool 2138 operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2139 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2140 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2141 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2142 2143 template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2144 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2145 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2146 friend 2147 bool 2148 operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2149 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2150 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2151 _Bp, _Tp, _Cp, _Lp, _Fp>& __y); 2152 2153 template <class _CharT, class _Traits, 2154 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2155 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2156 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2157 friend 2158 basic_ostream<_CharT, _Traits>& 2159 operator<<(basic_ostream<_CharT, _Traits>& __os, 2160 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2161 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2162 2163 template <class _CharT, class _Traits, 2164 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2165 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2166 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2167 friend 2168 basic_istream<_CharT, _Traits>& 2169 operator>>(basic_istream<_CharT, _Traits>& __is, 2170 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2171 _Bp, _Tp, _Cp, _Lp, _Fp>& __x); 2172private: 2173 2174 template<class _Sseq> 2175 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 2176 template<class _Sseq> 2177 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 2178 2179 template <size_t __count> 2180 _LIBCPP_INLINE_VISIBILITY 2181 static 2182 typename enable_if 2183 < 2184 __count < __w, 2185 result_type 2186 >::type 2187 __lshift(result_type __x) {return (__x << __count) & _Max;} 2188 2189 template <size_t __count> 2190 _LIBCPP_INLINE_VISIBILITY 2191 static 2192 typename enable_if 2193 < 2194 (__count >= __w), 2195 result_type 2196 >::type 2197 __lshift(result_type) {return result_type(0);} 2198 2199 template <size_t __count> 2200 _LIBCPP_INLINE_VISIBILITY 2201 static 2202 typename enable_if 2203 < 2204 __count < _Dt, 2205 result_type 2206 >::type 2207 __rshift(result_type __x) {return __x >> __count;} 2208 2209 template <size_t __count> 2210 _LIBCPP_INLINE_VISIBILITY 2211 static 2212 typename enable_if 2213 < 2214 (__count >= _Dt), 2215 result_type 2216 >::type 2217 __rshift(result_type) {return result_type(0);} 2218}; 2219 2220template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2221 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2222 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2223 _LIBCPP_CONSTEXPR const size_t 2224 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::word_size; 2225 2226template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2227 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2228 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2229 _LIBCPP_CONSTEXPR const size_t 2230 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::state_size; 2231 2232template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2233 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2234 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2235 _LIBCPP_CONSTEXPR const size_t 2236 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::shift_size; 2237 2238template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2239 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2240 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2241 _LIBCPP_CONSTEXPR const size_t 2242 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::mask_bits; 2243 2244template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2245 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2246 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2247 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2248 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::xor_mask; 2249 2250template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2251 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2252 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2253 _LIBCPP_CONSTEXPR const size_t 2254 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_u; 2255 2256template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2257 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2258 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2259 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2260 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_d; 2261 2262template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2263 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2264 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2265 _LIBCPP_CONSTEXPR const size_t 2266 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_s; 2267 2268template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2269 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2270 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2271 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2272 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_b; 2273 2274template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2275 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2276 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2277 _LIBCPP_CONSTEXPR const size_t 2278 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_t; 2279 2280template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2281 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2282 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2283 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2284 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_c; 2285 2286template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2287 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2288 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2289 _LIBCPP_CONSTEXPR const size_t 2290 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::tempering_l; 2291 2292template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2293 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2294 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2295 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2296 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::initialization_multiplier; 2297 2298template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2299 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2300 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2301 _LIBCPP_CONSTEXPR const typename mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::result_type 2302 mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, __t, __c, __l, __f>::default_seed; 2303 2304template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2305 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2306 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2307void 2308mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2309 __t, __c, __l, __f>::seed(result_type __sd) 2310 _LIBCPP_DISABLE_UBSAN_UNSIGNED_INTEGER_CHECK 2311{ // __w >= 2 2312 __x_[0] = __sd & _Max; 2313 for (size_t __i = 1; __i < __n; ++__i) 2314 __x_[__i] = (__f * (__x_[__i-1] ^ __rshift<__w - 2>(__x_[__i-1])) + __i) & _Max; 2315 __i_ = 0; 2316} 2317 2318template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2319 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2320 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2321template<class _Sseq> 2322void 2323mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2324 __t, __c, __l, __f>::__seed(_Sseq& __q, integral_constant<unsigned, 1>) 2325{ 2326 const unsigned __k = 1; 2327 uint32_t __ar[__n * __k]; 2328 __q.generate(__ar, __ar + __n * __k); 2329 for (size_t __i = 0; __i < __n; ++__i) 2330 __x_[__i] = static_cast<result_type>(__ar[__i] & _Max); 2331 const result_type __mask = __r == _Dt ? result_type(~0) : 2332 (result_type(1) << __r) - result_type(1); 2333 __i_ = 0; 2334 if ((__x_[0] & ~__mask) == 0) 2335 { 2336 for (size_t __i = 1; __i < __n; ++__i) 2337 if (__x_[__i] != 0) 2338 return; 2339 __x_[0] = result_type(1) << (__w - 1); 2340 } 2341} 2342 2343template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2344 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2345 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2346template<class _Sseq> 2347void 2348mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2349 __t, __c, __l, __f>::__seed(_Sseq& __q, integral_constant<unsigned, 2>) 2350{ 2351 const unsigned __k = 2; 2352 uint32_t __ar[__n * __k]; 2353 __q.generate(__ar, __ar + __n * __k); 2354 for (size_t __i = 0; __i < __n; ++__i) 2355 __x_[__i] = static_cast<result_type>( 2356 (__ar[2 * __i] + ((uint64_t)__ar[2 * __i + 1] << 32)) & _Max); 2357 const result_type __mask = __r == _Dt ? result_type(~0) : 2358 (result_type(1) << __r) - result_type(1); 2359 __i_ = 0; 2360 if ((__x_[0] & ~__mask) == 0) 2361 { 2362 for (size_t __i = 1; __i < __n; ++__i) 2363 if (__x_[__i] != 0) 2364 return; 2365 __x_[0] = result_type(1) << (__w - 1); 2366 } 2367} 2368 2369template <class _UIntType, size_t __w, size_t __n, size_t __m, size_t __r, 2370 _UIntType __a, size_t __u, _UIntType __d, size_t __s, 2371 _UIntType __b, size_t __t, _UIntType __c, size_t __l, _UIntType __f> 2372_UIntType 2373mersenne_twister_engine<_UIntType, __w, __n, __m, __r, __a, __u, __d, __s, __b, 2374 __t, __c, __l, __f>::operator()() 2375{ 2376 const size_t __j = (__i_ + 1) % __n; 2377 const result_type __mask = __r == _Dt ? result_type(~0) : 2378 (result_type(1) << __r) - result_type(1); 2379 const result_type _Yp = (__x_[__i_] & ~__mask) | (__x_[__j] & __mask); 2380 const size_t __k = (__i_ + __m) % __n; 2381 __x_[__i_] = __x_[__k] ^ __rshift<1>(_Yp) ^ (__a * (_Yp & 1)); 2382 result_type __z = __x_[__i_] ^ (__rshift<__u>(__x_[__i_]) & __d); 2383 __i_ = __j; 2384 __z ^= __lshift<__s>(__z) & __b; 2385 __z ^= __lshift<__t>(__z) & __c; 2386 return __z ^ __rshift<__l>(__z); 2387} 2388 2389template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2390 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2391 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2392bool 2393operator==(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2394 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2395 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2396 _Bp, _Tp, _Cp, _Lp, _Fp>& __y) 2397{ 2398 if (__x.__i_ == __y.__i_) 2399 return _VSTD::equal(__x.__x_, __x.__x_ + _Np, __y.__x_); 2400 if (__x.__i_ == 0 || __y.__i_ == 0) 2401 { 2402 size_t __j = _VSTD::min(_Np - __x.__i_, _Np - __y.__i_); 2403 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + __x.__i_ + __j, 2404 __y.__x_ + __y.__i_)) 2405 return false; 2406 if (__x.__i_ == 0) 2407 return _VSTD::equal(__x.__x_ + __j, __x.__x_ + _Np, __y.__x_); 2408 return _VSTD::equal(__x.__x_, __x.__x_ + (_Np - __j), __y.__x_ + __j); 2409 } 2410 if (__x.__i_ < __y.__i_) 2411 { 2412 size_t __j = _Np - __y.__i_; 2413 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + (__x.__i_ + __j), 2414 __y.__x_ + __y.__i_)) 2415 return false; 2416 if (!_VSTD::equal(__x.__x_ + (__x.__i_ + __j), __x.__x_ + _Np, 2417 __y.__x_)) 2418 return false; 2419 return _VSTD::equal(__x.__x_, __x.__x_ + __x.__i_, 2420 __y.__x_ + (_Np - (__x.__i_ + __j))); 2421 } 2422 size_t __j = _Np - __x.__i_; 2423 if (!_VSTD::equal(__y.__x_ + __y.__i_, __y.__x_ + (__y.__i_ + __j), 2424 __x.__x_ + __x.__i_)) 2425 return false; 2426 if (!_VSTD::equal(__y.__x_ + (__y.__i_ + __j), __y.__x_ + _Np, 2427 __x.__x_)) 2428 return false; 2429 return _VSTD::equal(__y.__x_, __y.__x_ + __y.__i_, 2430 __x.__x_ + (_Np - (__y.__i_ + __j))); 2431} 2432 2433template <class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2434 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2435 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2436inline _LIBCPP_INLINE_VISIBILITY 2437bool 2438operator!=(const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2439 _Bp, _Tp, _Cp, _Lp, _Fp>& __x, 2440 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2441 _Bp, _Tp, _Cp, _Lp, _Fp>& __y) 2442{ 2443 return !(__x == __y); 2444} 2445 2446template <class _CharT, class _Traits, 2447 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2448 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2449 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2450basic_ostream<_CharT, _Traits>& 2451operator<<(basic_ostream<_CharT, _Traits>& __os, 2452 const mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2453 _Bp, _Tp, _Cp, _Lp, _Fp>& __x) 2454{ 2455 __save_flags<_CharT, _Traits> __lx(__os); 2456 __os.flags(ios_base::dec | ios_base::left); 2457 _CharT __sp = __os.widen(' '); 2458 __os.fill(__sp); 2459 __os << __x.__x_[__x.__i_]; 2460 for (size_t __j = __x.__i_ + 1; __j < _Np; ++__j) 2461 __os << __sp << __x.__x_[__j]; 2462 for (size_t __j = 0; __j < __x.__i_; ++__j) 2463 __os << __sp << __x.__x_[__j]; 2464 return __os; 2465} 2466 2467template <class _CharT, class _Traits, 2468 class _UInt, size_t _Wp, size_t _Np, size_t _Mp, size_t _Rp, 2469 _UInt _Ap, size_t _Up, _UInt _Dp, size_t _Sp, 2470 _UInt _Bp, size_t _Tp, _UInt _Cp, size_t _Lp, _UInt _Fp> 2471basic_istream<_CharT, _Traits>& 2472operator>>(basic_istream<_CharT, _Traits>& __is, 2473 mersenne_twister_engine<_UInt, _Wp, _Np, _Mp, _Rp, _Ap, _Up, _Dp, _Sp, 2474 _Bp, _Tp, _Cp, _Lp, _Fp>& __x) 2475{ 2476 __save_flags<_CharT, _Traits> __lx(__is); 2477 __is.flags(ios_base::dec | ios_base::skipws); 2478 _UInt __t[_Np]; 2479 for (size_t __i = 0; __i < _Np; ++__i) 2480 __is >> __t[__i]; 2481 if (!__is.fail()) 2482 { 2483 for (size_t __i = 0; __i < _Np; ++__i) 2484 __x.__x_[__i] = __t[__i]; 2485 __x.__i_ = 0; 2486 } 2487 return __is; 2488} 2489 2490typedef mersenne_twister_engine<uint_fast32_t, 32, 624, 397, 31, 2491 0x9908b0df, 11, 0xffffffff, 2492 7, 0x9d2c5680, 2493 15, 0xefc60000, 2494 18, 1812433253> mt19937; 2495typedef mersenne_twister_engine<uint_fast64_t, 64, 312, 156, 31, 2496 0xb5026f5aa96619e9ULL, 29, 0x5555555555555555ULL, 2497 17, 0x71d67fffeda60000ULL, 2498 37, 0xfff7eee000000000ULL, 2499 43, 6364136223846793005ULL> mt19937_64; 2500 2501// subtract_with_carry_engine 2502 2503template<class _UIntType, size_t __w, size_t __s, size_t __r> 2504class _LIBCPP_TEMPLATE_VIS subtract_with_carry_engine; 2505 2506template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2507bool 2508operator==( 2509 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2510 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2511 2512template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2513_LIBCPP_INLINE_VISIBILITY 2514bool 2515operator!=( 2516 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2517 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2518 2519template <class _CharT, class _Traits, 2520 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2521basic_ostream<_CharT, _Traits>& 2522operator<<(basic_ostream<_CharT, _Traits>& __os, 2523 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2524 2525template <class _CharT, class _Traits, 2526 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2527basic_istream<_CharT, _Traits>& 2528operator>>(basic_istream<_CharT, _Traits>& __is, 2529 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2530 2531template<class _UIntType, size_t __w, size_t __s, size_t __r> 2532class _LIBCPP_TEMPLATE_VIS subtract_with_carry_engine 2533{ 2534public: 2535 // types 2536 typedef _UIntType result_type; 2537 2538private: 2539 result_type __x_[__r]; 2540 result_type __c_; 2541 size_t __i_; 2542 2543 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 2544 static_assert( 0 < __w, "subtract_with_carry_engine invalid parameters"); 2545 static_assert(__w <= _Dt, "subtract_with_carry_engine invalid parameters"); 2546 static_assert( 0 < __s, "subtract_with_carry_engine invalid parameters"); 2547 static_assert(__s < __r, "subtract_with_carry_engine invalid parameters"); 2548public: 2549 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 2550 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 2551 (result_type(1) << __w) - result_type(1); 2552 static_assert(_Min < _Max, "subtract_with_carry_engine invalid parameters"); 2553 2554 // engine characteristics 2555 static _LIBCPP_CONSTEXPR const size_t word_size = __w; 2556 static _LIBCPP_CONSTEXPR const size_t short_lag = __s; 2557 static _LIBCPP_CONSTEXPR const size_t long_lag = __r; 2558 _LIBCPP_INLINE_VISIBILITY 2559 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 2560 _LIBCPP_INLINE_VISIBILITY 2561 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 2562 static _LIBCPP_CONSTEXPR const result_type default_seed = 19780503u; 2563 2564 // constructors and seeding functions 2565 _LIBCPP_INLINE_VISIBILITY 2566 explicit subtract_with_carry_engine(result_type __sd = default_seed) 2567 {seed(__sd);} 2568 template<class _Sseq> 2569 _LIBCPP_INLINE_VISIBILITY 2570 explicit subtract_with_carry_engine(_Sseq& __q, 2571 typename enable_if<__is_seed_sequence<_Sseq, subtract_with_carry_engine>::value>::type* = 0) 2572 {seed(__q);} 2573 _LIBCPP_INLINE_VISIBILITY 2574 void seed(result_type __sd = default_seed) 2575 {seed(__sd, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2576 template<class _Sseq> 2577 _LIBCPP_INLINE_VISIBILITY 2578 typename enable_if 2579 < 2580 __is_seed_sequence<_Sseq, subtract_with_carry_engine>::value, 2581 void 2582 >::type 2583 seed(_Sseq& __q) 2584 {__seed(__q, integral_constant<unsigned, 1 + (__w - 1) / 32>());} 2585 2586 // generating functions 2587 result_type operator()(); 2588 _LIBCPP_INLINE_VISIBILITY 2589 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2590 2591 template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2592 friend 2593 bool 2594 operator==( 2595 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2596 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2597 2598 template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2599 friend 2600 bool 2601 operator!=( 2602 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2603 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y); 2604 2605 template <class _CharT, class _Traits, 2606 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2607 friend 2608 basic_ostream<_CharT, _Traits>& 2609 operator<<(basic_ostream<_CharT, _Traits>& __os, 2610 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2611 2612 template <class _CharT, class _Traits, 2613 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2614 friend 2615 basic_istream<_CharT, _Traits>& 2616 operator>>(basic_istream<_CharT, _Traits>& __is, 2617 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x); 2618 2619private: 2620 2621 void seed(result_type __sd, integral_constant<unsigned, 1>); 2622 void seed(result_type __sd, integral_constant<unsigned, 2>); 2623 template<class _Sseq> 2624 void __seed(_Sseq& __q, integral_constant<unsigned, 1>); 2625 template<class _Sseq> 2626 void __seed(_Sseq& __q, integral_constant<unsigned, 2>); 2627}; 2628 2629template<class _UIntType, size_t __w, size_t __s, size_t __r> 2630 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::word_size; 2631 2632template<class _UIntType, size_t __w, size_t __s, size_t __r> 2633 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::short_lag; 2634 2635template<class _UIntType, size_t __w, size_t __s, size_t __r> 2636 _LIBCPP_CONSTEXPR const size_t subtract_with_carry_engine<_UIntType, __w, __s, __r>::long_lag; 2637 2638template<class _UIntType, size_t __w, size_t __s, size_t __r> 2639 _LIBCPP_CONSTEXPR const typename subtract_with_carry_engine<_UIntType, __w, __s, __r>::result_type 2640 subtract_with_carry_engine<_UIntType, __w, __s, __r>::default_seed; 2641 2642template<class _UIntType, size_t __w, size_t __s, size_t __r> 2643void 2644subtract_with_carry_engine<_UIntType, __w, __s, __r>::seed(result_type __sd, 2645 integral_constant<unsigned, 1>) 2646{ 2647 linear_congruential_engine<result_type, 40014u, 0u, 2147483563u> 2648 __e(__sd == 0u ? default_seed : __sd); 2649 for (size_t __i = 0; __i < __r; ++__i) 2650 __x_[__i] = static_cast<result_type>(__e() & _Max); 2651 __c_ = __x_[__r-1] == 0; 2652 __i_ = 0; 2653} 2654 2655template<class _UIntType, size_t __w, size_t __s, size_t __r> 2656void 2657subtract_with_carry_engine<_UIntType, __w, __s, __r>::seed(result_type __sd, 2658 integral_constant<unsigned, 2>) 2659{ 2660 linear_congruential_engine<result_type, 40014u, 0u, 2147483563u> 2661 __e(__sd == 0u ? default_seed : __sd); 2662 for (size_t __i = 0; __i < __r; ++__i) 2663 { 2664 result_type __e0 = __e(); 2665 __x_[__i] = static_cast<result_type>( 2666 (__e0 + ((uint64_t)__e() << 32)) & _Max); 2667 } 2668 __c_ = __x_[__r-1] == 0; 2669 __i_ = 0; 2670} 2671 2672template<class _UIntType, size_t __w, size_t __s, size_t __r> 2673template<class _Sseq> 2674void 2675subtract_with_carry_engine<_UIntType, __w, __s, __r>::__seed(_Sseq& __q, 2676 integral_constant<unsigned, 1>) 2677{ 2678 const unsigned __k = 1; 2679 uint32_t __ar[__r * __k]; 2680 __q.generate(__ar, __ar + __r * __k); 2681 for (size_t __i = 0; __i < __r; ++__i) 2682 __x_[__i] = static_cast<result_type>(__ar[__i] & _Max); 2683 __c_ = __x_[__r-1] == 0; 2684 __i_ = 0; 2685} 2686 2687template<class _UIntType, size_t __w, size_t __s, size_t __r> 2688template<class _Sseq> 2689void 2690subtract_with_carry_engine<_UIntType, __w, __s, __r>::__seed(_Sseq& __q, 2691 integral_constant<unsigned, 2>) 2692{ 2693 const unsigned __k = 2; 2694 uint32_t __ar[__r * __k]; 2695 __q.generate(__ar, __ar + __r * __k); 2696 for (size_t __i = 0; __i < __r; ++__i) 2697 __x_[__i] = static_cast<result_type>( 2698 (__ar[2 * __i] + ((uint64_t)__ar[2 * __i + 1] << 32)) & _Max); 2699 __c_ = __x_[__r-1] == 0; 2700 __i_ = 0; 2701} 2702 2703template<class _UIntType, size_t __w, size_t __s, size_t __r> 2704_UIntType 2705subtract_with_carry_engine<_UIntType, __w, __s, __r>::operator()() 2706{ 2707 const result_type& __xs = __x_[(__i_ + (__r - __s)) % __r]; 2708 result_type& __xr = __x_[__i_]; 2709 result_type __new_c = __c_ == 0 ? __xs < __xr : __xs != 0 ? __xs <= __xr : 1; 2710 __xr = (__xs - __xr - __c_) & _Max; 2711 __c_ = __new_c; 2712 __i_ = (__i_ + 1) % __r; 2713 return __xr; 2714} 2715 2716template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2717bool 2718operator==( 2719 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2720 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y) 2721{ 2722 if (__x.__c_ != __y.__c_) 2723 return false; 2724 if (__x.__i_ == __y.__i_) 2725 return _VSTD::equal(__x.__x_, __x.__x_ + _Rp, __y.__x_); 2726 if (__x.__i_ == 0 || __y.__i_ == 0) 2727 { 2728 size_t __j = _VSTD::min(_Rp - __x.__i_, _Rp - __y.__i_); 2729 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + __x.__i_ + __j, 2730 __y.__x_ + __y.__i_)) 2731 return false; 2732 if (__x.__i_ == 0) 2733 return _VSTD::equal(__x.__x_ + __j, __x.__x_ + _Rp, __y.__x_); 2734 return _VSTD::equal(__x.__x_, __x.__x_ + (_Rp - __j), __y.__x_ + __j); 2735 } 2736 if (__x.__i_ < __y.__i_) 2737 { 2738 size_t __j = _Rp - __y.__i_; 2739 if (!_VSTD::equal(__x.__x_ + __x.__i_, __x.__x_ + (__x.__i_ + __j), 2740 __y.__x_ + __y.__i_)) 2741 return false; 2742 if (!_VSTD::equal(__x.__x_ + (__x.__i_ + __j), __x.__x_ + _Rp, 2743 __y.__x_)) 2744 return false; 2745 return _VSTD::equal(__x.__x_, __x.__x_ + __x.__i_, 2746 __y.__x_ + (_Rp - (__x.__i_ + __j))); 2747 } 2748 size_t __j = _Rp - __x.__i_; 2749 if (!_VSTD::equal(__y.__x_ + __y.__i_, __y.__x_ + (__y.__i_ + __j), 2750 __x.__x_ + __x.__i_)) 2751 return false; 2752 if (!_VSTD::equal(__y.__x_ + (__y.__i_ + __j), __y.__x_ + _Rp, 2753 __x.__x_)) 2754 return false; 2755 return _VSTD::equal(__y.__x_, __y.__x_ + __y.__i_, 2756 __x.__x_ + (_Rp - (__y.__i_ + __j))); 2757} 2758 2759template<class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2760inline _LIBCPP_INLINE_VISIBILITY 2761bool 2762operator!=( 2763 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x, 2764 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __y) 2765{ 2766 return !(__x == __y); 2767} 2768 2769template <class _CharT, class _Traits, 2770 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2771basic_ostream<_CharT, _Traits>& 2772operator<<(basic_ostream<_CharT, _Traits>& __os, 2773 const subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x) 2774{ 2775 __save_flags<_CharT, _Traits> __lx(__os); 2776 __os.flags(ios_base::dec | ios_base::left); 2777 _CharT __sp = __os.widen(' '); 2778 __os.fill(__sp); 2779 __os << __x.__x_[__x.__i_]; 2780 for (size_t __j = __x.__i_ + 1; __j < _Rp; ++__j) 2781 __os << __sp << __x.__x_[__j]; 2782 for (size_t __j = 0; __j < __x.__i_; ++__j) 2783 __os << __sp << __x.__x_[__j]; 2784 __os << __sp << __x.__c_; 2785 return __os; 2786} 2787 2788template <class _CharT, class _Traits, 2789 class _UInt, size_t _Wp, size_t _Sp, size_t _Rp> 2790basic_istream<_CharT, _Traits>& 2791operator>>(basic_istream<_CharT, _Traits>& __is, 2792 subtract_with_carry_engine<_UInt, _Wp, _Sp, _Rp>& __x) 2793{ 2794 __save_flags<_CharT, _Traits> __lx(__is); 2795 __is.flags(ios_base::dec | ios_base::skipws); 2796 _UInt __t[_Rp+1]; 2797 for (size_t __i = 0; __i < _Rp+1; ++__i) 2798 __is >> __t[__i]; 2799 if (!__is.fail()) 2800 { 2801 for (size_t __i = 0; __i < _Rp; ++__i) 2802 __x.__x_[__i] = __t[__i]; 2803 __x.__c_ = __t[_Rp]; 2804 __x.__i_ = 0; 2805 } 2806 return __is; 2807} 2808 2809typedef subtract_with_carry_engine<uint_fast32_t, 24, 10, 24> ranlux24_base; 2810typedef subtract_with_carry_engine<uint_fast64_t, 48, 5, 12> ranlux48_base; 2811 2812// discard_block_engine 2813 2814template<class _Engine, size_t __p, size_t __r> 2815class _LIBCPP_TEMPLATE_VIS discard_block_engine 2816{ 2817 _Engine __e_; 2818 int __n_; 2819 2820 static_assert( 0 < __r, "discard_block_engine invalid parameters"); 2821 static_assert(__r <= __p, "discard_block_engine invalid parameters"); 2822 static_assert(__r <= INT_MAX, "discard_block_engine invalid parameters"); 2823public: 2824 // types 2825 typedef typename _Engine::result_type result_type; 2826 2827 // engine characteristics 2828 static _LIBCPP_CONSTEXPR const size_t block_size = __p; 2829 static _LIBCPP_CONSTEXPR const size_t used_block = __r; 2830 2831#ifdef _LIBCPP_CXX03_LANG 2832 static const result_type _Min = _Engine::_Min; 2833 static const result_type _Max = _Engine::_Max; 2834#else 2835 static _LIBCPP_CONSTEXPR const result_type _Min = _Engine::min(); 2836 static _LIBCPP_CONSTEXPR const result_type _Max = _Engine::max(); 2837#endif 2838 2839 _LIBCPP_INLINE_VISIBILITY 2840 static _LIBCPP_CONSTEXPR result_type min() { return _Engine::min(); } 2841 _LIBCPP_INLINE_VISIBILITY 2842 static _LIBCPP_CONSTEXPR result_type max() { return _Engine::max(); } 2843 2844 // constructors and seeding functions 2845 _LIBCPP_INLINE_VISIBILITY 2846 discard_block_engine() : __n_(0) {} 2847 _LIBCPP_INLINE_VISIBILITY 2848 explicit discard_block_engine(const _Engine& __e) 2849 : __e_(__e), __n_(0) {} 2850#ifndef _LIBCPP_CXX03_LANG 2851 _LIBCPP_INLINE_VISIBILITY 2852 explicit discard_block_engine(_Engine&& __e) 2853 : __e_(_VSTD::move(__e)), __n_(0) {} 2854#endif // _LIBCPP_CXX03_LANG 2855 _LIBCPP_INLINE_VISIBILITY 2856 explicit discard_block_engine(result_type __sd) : __e_(__sd), __n_(0) {} 2857 template<class _Sseq> 2858 _LIBCPP_INLINE_VISIBILITY 2859 explicit discard_block_engine(_Sseq& __q, 2860 typename enable_if<__is_seed_sequence<_Sseq, discard_block_engine>::value && 2861 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 2862 : __e_(__q), __n_(0) {} 2863 _LIBCPP_INLINE_VISIBILITY 2864 void seed() {__e_.seed(); __n_ = 0;} 2865 _LIBCPP_INLINE_VISIBILITY 2866 void seed(result_type __sd) {__e_.seed(__sd); __n_ = 0;} 2867 template<class _Sseq> 2868 _LIBCPP_INLINE_VISIBILITY 2869 typename enable_if 2870 < 2871 __is_seed_sequence<_Sseq, discard_block_engine>::value, 2872 void 2873 >::type 2874 seed(_Sseq& __q) {__e_.seed(__q); __n_ = 0;} 2875 2876 // generating functions 2877 result_type operator()(); 2878 _LIBCPP_INLINE_VISIBILITY 2879 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 2880 2881 // property functions 2882 _LIBCPP_INLINE_VISIBILITY 2883 const _Engine& base() const _NOEXCEPT {return __e_;} 2884 2885 template<class _Eng, size_t _Pp, size_t _Rp> 2886 friend 2887 bool 2888 operator==( 2889 const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2890 const discard_block_engine<_Eng, _Pp, _Rp>& __y); 2891 2892 template<class _Eng, size_t _Pp, size_t _Rp> 2893 friend 2894 bool 2895 operator!=( 2896 const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2897 const discard_block_engine<_Eng, _Pp, _Rp>& __y); 2898 2899 template <class _CharT, class _Traits, 2900 class _Eng, size_t _Pp, size_t _Rp> 2901 friend 2902 basic_ostream<_CharT, _Traits>& 2903 operator<<(basic_ostream<_CharT, _Traits>& __os, 2904 const discard_block_engine<_Eng, _Pp, _Rp>& __x); 2905 2906 template <class _CharT, class _Traits, 2907 class _Eng, size_t _Pp, size_t _Rp> 2908 friend 2909 basic_istream<_CharT, _Traits>& 2910 operator>>(basic_istream<_CharT, _Traits>& __is, 2911 discard_block_engine<_Eng, _Pp, _Rp>& __x); 2912}; 2913 2914template<class _Engine, size_t __p, size_t __r> 2915 _LIBCPP_CONSTEXPR const size_t discard_block_engine<_Engine, __p, __r>::block_size; 2916 2917template<class _Engine, size_t __p, size_t __r> 2918 _LIBCPP_CONSTEXPR const size_t discard_block_engine<_Engine, __p, __r>::used_block; 2919 2920template<class _Engine, size_t __p, size_t __r> 2921typename discard_block_engine<_Engine, __p, __r>::result_type 2922discard_block_engine<_Engine, __p, __r>::operator()() 2923{ 2924 if (__n_ >= static_cast<int>(__r)) 2925 { 2926 __e_.discard(__p - __r); 2927 __n_ = 0; 2928 } 2929 ++__n_; 2930 return __e_(); 2931} 2932 2933template<class _Eng, size_t _Pp, size_t _Rp> 2934inline _LIBCPP_INLINE_VISIBILITY 2935bool 2936operator==(const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2937 const discard_block_engine<_Eng, _Pp, _Rp>& __y) 2938{ 2939 return __x.__n_ == __y.__n_ && __x.__e_ == __y.__e_; 2940} 2941 2942template<class _Eng, size_t _Pp, size_t _Rp> 2943inline _LIBCPP_INLINE_VISIBILITY 2944bool 2945operator!=(const discard_block_engine<_Eng, _Pp, _Rp>& __x, 2946 const discard_block_engine<_Eng, _Pp, _Rp>& __y) 2947{ 2948 return !(__x == __y); 2949} 2950 2951template <class _CharT, class _Traits, 2952 class _Eng, size_t _Pp, size_t _Rp> 2953basic_ostream<_CharT, _Traits>& 2954operator<<(basic_ostream<_CharT, _Traits>& __os, 2955 const discard_block_engine<_Eng, _Pp, _Rp>& __x) 2956{ 2957 __save_flags<_CharT, _Traits> __lx(__os); 2958 __os.flags(ios_base::dec | ios_base::left); 2959 _CharT __sp = __os.widen(' '); 2960 __os.fill(__sp); 2961 return __os << __x.__e_ << __sp << __x.__n_; 2962} 2963 2964template <class _CharT, class _Traits, 2965 class _Eng, size_t _Pp, size_t _Rp> 2966basic_istream<_CharT, _Traits>& 2967operator>>(basic_istream<_CharT, _Traits>& __is, 2968 discard_block_engine<_Eng, _Pp, _Rp>& __x) 2969{ 2970 __save_flags<_CharT, _Traits> __lx(__is); 2971 __is.flags(ios_base::dec | ios_base::skipws); 2972 _Eng __e; 2973 int __n; 2974 __is >> __e >> __n; 2975 if (!__is.fail()) 2976 { 2977 __x.__e_ = __e; 2978 __x.__n_ = __n; 2979 } 2980 return __is; 2981} 2982 2983typedef discard_block_engine<ranlux24_base, 223, 23> ranlux24; 2984typedef discard_block_engine<ranlux48_base, 389, 11> ranlux48; 2985 2986// independent_bits_engine 2987 2988template<class _Engine, size_t __w, class _UIntType> 2989class _LIBCPP_TEMPLATE_VIS independent_bits_engine 2990{ 2991 template <class _UInt, _UInt _R0, size_t _Wp, size_t _Mp> 2992 class __get_n 2993 { 2994 static _LIBCPP_CONSTEXPR const size_t _Dt = numeric_limits<_UInt>::digits; 2995 static _LIBCPP_CONSTEXPR const size_t _Np = _Wp / _Mp + (_Wp % _Mp != 0); 2996 static _LIBCPP_CONSTEXPR const size_t _W0 = _Wp / _Np; 2997 static _LIBCPP_CONSTEXPR const _UInt _Y0 = _W0 >= _Dt ? 0 : (_R0 >> _W0) << _W0; 2998 public: 2999 static _LIBCPP_CONSTEXPR const size_t value = _R0 - _Y0 > _Y0 / _Np ? _Np + 1 : _Np; 3000 }; 3001public: 3002 // types 3003 typedef _UIntType result_type; 3004 3005private: 3006 _Engine __e_; 3007 3008 static _LIBCPP_CONSTEXPR const result_type _Dt = numeric_limits<result_type>::digits; 3009 static_assert( 0 < __w, "independent_bits_engine invalid parameters"); 3010 static_assert(__w <= _Dt, "independent_bits_engine invalid parameters"); 3011 3012 typedef typename _Engine::result_type _Engine_result_type; 3013 typedef typename conditional 3014 < 3015 sizeof(_Engine_result_type) <= sizeof(result_type), 3016 result_type, 3017 _Engine_result_type 3018 >::type _Working_result_type; 3019#ifdef _LIBCPP_CXX03_LANG 3020 static const _Working_result_type _Rp = _Engine::_Max - _Engine::_Min 3021 + _Working_result_type(1); 3022#else 3023 static _LIBCPP_CONSTEXPR const _Working_result_type _Rp = _Engine::max() - _Engine::min() 3024 + _Working_result_type(1); 3025#endif 3026 static _LIBCPP_CONSTEXPR const size_t __m = __log2<_Working_result_type, _Rp>::value; 3027 static _LIBCPP_CONSTEXPR const size_t __n = __get_n<_Working_result_type, _Rp, __w, __m>::value; 3028 static _LIBCPP_CONSTEXPR const size_t __w0 = __w / __n; 3029 static _LIBCPP_CONSTEXPR const size_t __n0 = __n - __w % __n; 3030 static _LIBCPP_CONSTEXPR const size_t _WDt = numeric_limits<_Working_result_type>::digits; 3031 static _LIBCPP_CONSTEXPR const size_t _EDt = numeric_limits<_Engine_result_type>::digits; 3032 static _LIBCPP_CONSTEXPR const _Working_result_type __y0 = __w0 >= _WDt ? 0 : 3033 (_Rp >> __w0) << __w0; 3034 static _LIBCPP_CONSTEXPR const _Working_result_type __y1 = __w0 >= _WDt - 1 ? 0 : 3035 (_Rp >> (__w0+1)) << (__w0+1); 3036 static _LIBCPP_CONSTEXPR const _Engine_result_type __mask0 = __w0 > 0 ? 3037 _Engine_result_type(~0) >> (_EDt - __w0) : 3038 _Engine_result_type(0); 3039 static _LIBCPP_CONSTEXPR const _Engine_result_type __mask1 = __w0 < _EDt - 1 ? 3040 _Engine_result_type(~0) >> (_EDt - (__w0 + 1)) : 3041 _Engine_result_type(~0); 3042public: 3043 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 3044 static _LIBCPP_CONSTEXPR const result_type _Max = __w == _Dt ? result_type(~0) : 3045 (result_type(1) << __w) - result_type(1); 3046 static_assert(_Min < _Max, "independent_bits_engine invalid parameters"); 3047 3048 // engine characteristics 3049 _LIBCPP_INLINE_VISIBILITY 3050 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 3051 _LIBCPP_INLINE_VISIBILITY 3052 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 3053 3054 // constructors and seeding functions 3055 _LIBCPP_INLINE_VISIBILITY 3056 independent_bits_engine() {} 3057 _LIBCPP_INLINE_VISIBILITY 3058 explicit independent_bits_engine(const _Engine& __e) 3059 : __e_(__e) {} 3060#ifndef _LIBCPP_CXX03_LANG 3061 _LIBCPP_INLINE_VISIBILITY 3062 explicit independent_bits_engine(_Engine&& __e) 3063 : __e_(_VSTD::move(__e)) {} 3064#endif // _LIBCPP_CXX03_LANG 3065 _LIBCPP_INLINE_VISIBILITY 3066 explicit independent_bits_engine(result_type __sd) : __e_(__sd) {} 3067 template<class _Sseq> 3068 _LIBCPP_INLINE_VISIBILITY 3069 explicit independent_bits_engine(_Sseq& __q, 3070 typename enable_if<__is_seed_sequence<_Sseq, independent_bits_engine>::value && 3071 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 3072 : __e_(__q) {} 3073 _LIBCPP_INLINE_VISIBILITY 3074 void seed() {__e_.seed();} 3075 _LIBCPP_INLINE_VISIBILITY 3076 void seed(result_type __sd) {__e_.seed(__sd);} 3077 template<class _Sseq> 3078 _LIBCPP_INLINE_VISIBILITY 3079 typename enable_if 3080 < 3081 __is_seed_sequence<_Sseq, independent_bits_engine>::value, 3082 void 3083 >::type 3084 seed(_Sseq& __q) {__e_.seed(__q);} 3085 3086 // generating functions 3087 _LIBCPP_INLINE_VISIBILITY 3088 result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 3089 _LIBCPP_INLINE_VISIBILITY 3090 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 3091 3092 // property functions 3093 _LIBCPP_INLINE_VISIBILITY 3094 const _Engine& base() const _NOEXCEPT {return __e_;} 3095 3096 template<class _Eng, size_t _Wp, class _UInt> 3097 friend 3098 bool 3099 operator==( 3100 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3101 const independent_bits_engine<_Eng, _Wp, _UInt>& __y); 3102 3103 template<class _Eng, size_t _Wp, class _UInt> 3104 friend 3105 bool 3106 operator!=( 3107 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3108 const independent_bits_engine<_Eng, _Wp, _UInt>& __y); 3109 3110 template <class _CharT, class _Traits, 3111 class _Eng, size_t _Wp, class _UInt> 3112 friend 3113 basic_ostream<_CharT, _Traits>& 3114 operator<<(basic_ostream<_CharT, _Traits>& __os, 3115 const independent_bits_engine<_Eng, _Wp, _UInt>& __x); 3116 3117 template <class _CharT, class _Traits, 3118 class _Eng, size_t _Wp, class _UInt> 3119 friend 3120 basic_istream<_CharT, _Traits>& 3121 operator>>(basic_istream<_CharT, _Traits>& __is, 3122 independent_bits_engine<_Eng, _Wp, _UInt>& __x); 3123 3124private: 3125 _LIBCPP_INLINE_VISIBILITY 3126 result_type __eval(false_type); 3127 result_type __eval(true_type); 3128 3129 template <size_t __count> 3130 _LIBCPP_INLINE_VISIBILITY 3131 static 3132 typename enable_if 3133 < 3134 __count < _Dt, 3135 result_type 3136 >::type 3137 __lshift(result_type __x) {return __x << __count;} 3138 3139 template <size_t __count> 3140 _LIBCPP_INLINE_VISIBILITY 3141 static 3142 typename enable_if 3143 < 3144 (__count >= _Dt), 3145 result_type 3146 >::type 3147 __lshift(result_type) {return result_type(0);} 3148}; 3149 3150template<class _Engine, size_t __w, class _UIntType> 3151inline 3152_UIntType 3153independent_bits_engine<_Engine, __w, _UIntType>::__eval(false_type) 3154{ 3155 return static_cast<result_type>(__e_() & __mask0); 3156} 3157 3158template<class _Engine, size_t __w, class _UIntType> 3159_UIntType 3160independent_bits_engine<_Engine, __w, _UIntType>::__eval(true_type) 3161{ 3162 result_type _Sp = 0; 3163 for (size_t __k = 0; __k < __n0; ++__k) 3164 { 3165 _Engine_result_type __u; 3166 do 3167 { 3168 __u = __e_() - _Engine::min(); 3169 } while (__u >= __y0); 3170 _Sp = static_cast<result_type>(__lshift<__w0>(_Sp) + (__u & __mask0)); 3171 } 3172 for (size_t __k = __n0; __k < __n; ++__k) 3173 { 3174 _Engine_result_type __u; 3175 do 3176 { 3177 __u = __e_() - _Engine::min(); 3178 } while (__u >= __y1); 3179 _Sp = static_cast<result_type>(__lshift<__w0+1>(_Sp) + (__u & __mask1)); 3180 } 3181 return _Sp; 3182} 3183 3184template<class _Eng, size_t _Wp, class _UInt> 3185inline _LIBCPP_INLINE_VISIBILITY 3186bool 3187operator==( 3188 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3189 const independent_bits_engine<_Eng, _Wp, _UInt>& __y) 3190{ 3191 return __x.base() == __y.base(); 3192} 3193 3194template<class _Eng, size_t _Wp, class _UInt> 3195inline _LIBCPP_INLINE_VISIBILITY 3196bool 3197operator!=( 3198 const independent_bits_engine<_Eng, _Wp, _UInt>& __x, 3199 const independent_bits_engine<_Eng, _Wp, _UInt>& __y) 3200{ 3201 return !(__x == __y); 3202} 3203 3204template <class _CharT, class _Traits, 3205 class _Eng, size_t _Wp, class _UInt> 3206basic_ostream<_CharT, _Traits>& 3207operator<<(basic_ostream<_CharT, _Traits>& __os, 3208 const independent_bits_engine<_Eng, _Wp, _UInt>& __x) 3209{ 3210 return __os << __x.base(); 3211} 3212 3213template <class _CharT, class _Traits, 3214 class _Eng, size_t _Wp, class _UInt> 3215basic_istream<_CharT, _Traits>& 3216operator>>(basic_istream<_CharT, _Traits>& __is, 3217 independent_bits_engine<_Eng, _Wp, _UInt>& __x) 3218{ 3219 _Eng __e; 3220 __is >> __e; 3221 if (!__is.fail()) 3222 __x.__e_ = __e; 3223 return __is; 3224} 3225 3226// shuffle_order_engine 3227 3228template <uint64_t _Xp, uint64_t _Yp> 3229struct __ugcd 3230{ 3231 static _LIBCPP_CONSTEXPR const uint64_t value = __ugcd<_Yp, _Xp % _Yp>::value; 3232}; 3233 3234template <uint64_t _Xp> 3235struct __ugcd<_Xp, 0> 3236{ 3237 static _LIBCPP_CONSTEXPR const uint64_t value = _Xp; 3238}; 3239 3240template <uint64_t _Np, uint64_t _Dp> 3241class __uratio 3242{ 3243 static_assert(_Dp != 0, "__uratio divide by 0"); 3244 static _LIBCPP_CONSTEXPR const uint64_t __gcd = __ugcd<_Np, _Dp>::value; 3245public: 3246 static _LIBCPP_CONSTEXPR const uint64_t num = _Np / __gcd; 3247 static _LIBCPP_CONSTEXPR const uint64_t den = _Dp / __gcd; 3248 3249 typedef __uratio<num, den> type; 3250}; 3251 3252template<class _Engine, size_t __k> 3253class _LIBCPP_TEMPLATE_VIS shuffle_order_engine 3254{ 3255 static_assert(0 < __k, "shuffle_order_engine invalid parameters"); 3256public: 3257 // types 3258 typedef typename _Engine::result_type result_type; 3259 3260private: 3261 _Engine __e_; 3262 result_type _V_[__k]; 3263 result_type _Y_; 3264 3265public: 3266 // engine characteristics 3267 static _LIBCPP_CONSTEXPR const size_t table_size = __k; 3268 3269#ifdef _LIBCPP_CXX03_LANG 3270 static const result_type _Min = _Engine::_Min; 3271 static const result_type _Max = _Engine::_Max; 3272#else 3273 static _LIBCPP_CONSTEXPR const result_type _Min = _Engine::min(); 3274 static _LIBCPP_CONSTEXPR const result_type _Max = _Engine::max(); 3275#endif 3276 static_assert(_Min < _Max, "shuffle_order_engine invalid parameters"); 3277 _LIBCPP_INLINE_VISIBILITY 3278 static _LIBCPP_CONSTEXPR result_type min() { return _Min; } 3279 _LIBCPP_INLINE_VISIBILITY 3280 static _LIBCPP_CONSTEXPR result_type max() { return _Max; } 3281 3282 static _LIBCPP_CONSTEXPR const unsigned long long _Rp = _Max - _Min + 1ull; 3283 3284 // constructors and seeding functions 3285 _LIBCPP_INLINE_VISIBILITY 3286 shuffle_order_engine() {__init();} 3287 _LIBCPP_INLINE_VISIBILITY 3288 explicit shuffle_order_engine(const _Engine& __e) 3289 : __e_(__e) {__init();} 3290#ifndef _LIBCPP_CXX03_LANG 3291 _LIBCPP_INLINE_VISIBILITY 3292 explicit shuffle_order_engine(_Engine&& __e) 3293 : __e_(_VSTD::move(__e)) {__init();} 3294#endif // _LIBCPP_CXX03_LANG 3295 _LIBCPP_INLINE_VISIBILITY 3296 explicit shuffle_order_engine(result_type __sd) : __e_(__sd) {__init();} 3297 template<class _Sseq> 3298 _LIBCPP_INLINE_VISIBILITY 3299 explicit shuffle_order_engine(_Sseq& __q, 3300 typename enable_if<__is_seed_sequence<_Sseq, shuffle_order_engine>::value && 3301 !is_convertible<_Sseq, _Engine>::value>::type* = 0) 3302 : __e_(__q) {__init();} 3303 _LIBCPP_INLINE_VISIBILITY 3304 void seed() {__e_.seed(); __init();} 3305 _LIBCPP_INLINE_VISIBILITY 3306 void seed(result_type __sd) {__e_.seed(__sd); __init();} 3307 template<class _Sseq> 3308 _LIBCPP_INLINE_VISIBILITY 3309 typename enable_if 3310 < 3311 __is_seed_sequence<_Sseq, shuffle_order_engine>::value, 3312 void 3313 >::type 3314 seed(_Sseq& __q) {__e_.seed(__q); __init();} 3315 3316 // generating functions 3317 _LIBCPP_INLINE_VISIBILITY 3318 result_type operator()() {return __eval(integral_constant<bool, _Rp != 0>());} 3319 _LIBCPP_INLINE_VISIBILITY 3320 void discard(unsigned long long __z) {for (; __z; --__z) operator()();} 3321 3322 // property functions 3323 _LIBCPP_INLINE_VISIBILITY 3324 const _Engine& base() const _NOEXCEPT {return __e_;} 3325 3326private: 3327 template<class _Eng, size_t _Kp> 3328 friend 3329 bool 3330 operator==( 3331 const shuffle_order_engine<_Eng, _Kp>& __x, 3332 const shuffle_order_engine<_Eng, _Kp>& __y); 3333 3334 template<class _Eng, size_t _Kp> 3335 friend 3336 bool 3337 operator!=( 3338 const shuffle_order_engine<_Eng, _Kp>& __x, 3339 const shuffle_order_engine<_Eng, _Kp>& __y); 3340 3341 template <class _CharT, class _Traits, 3342 class _Eng, size_t _Kp> 3343 friend 3344 basic_ostream<_CharT, _Traits>& 3345 operator<<(basic_ostream<_CharT, _Traits>& __os, 3346 const shuffle_order_engine<_Eng, _Kp>& __x); 3347 3348 template <class _CharT, class _Traits, 3349 class _Eng, size_t _Kp> 3350 friend 3351 basic_istream<_CharT, _Traits>& 3352 operator>>(basic_istream<_CharT, _Traits>& __is, 3353 shuffle_order_engine<_Eng, _Kp>& __x); 3354 3355 _LIBCPP_INLINE_VISIBILITY 3356 void __init() 3357 { 3358 for (size_t __i = 0; __i < __k; ++__i) 3359 _V_[__i] = __e_(); 3360 _Y_ = __e_(); 3361 } 3362 3363 _LIBCPP_INLINE_VISIBILITY 3364 result_type __eval(false_type) {return __eval2(integral_constant<bool, __k & 1>());} 3365 _LIBCPP_INLINE_VISIBILITY 3366 result_type __eval(true_type) {return __eval(__uratio<__k, _Rp>());} 3367 3368 _LIBCPP_INLINE_VISIBILITY 3369 result_type __eval2(false_type) {return __eval(__uratio<__k/2, 0x8000000000000000ull>());} 3370 _LIBCPP_INLINE_VISIBILITY 3371 result_type __eval2(true_type) {return __evalf<__k, 0>();} 3372 3373 template <uint64_t _Np, uint64_t _Dp> 3374 _LIBCPP_INLINE_VISIBILITY 3375 typename enable_if 3376 < 3377 (__uratio<_Np, _Dp>::num > 0xFFFFFFFFFFFFFFFFull / (_Max - _Min)), 3378 result_type 3379 >::type 3380 __eval(__uratio<_Np, _Dp>) 3381 {return __evalf<__uratio<_Np, _Dp>::num, __uratio<_Np, _Dp>::den>();} 3382 3383 template <uint64_t _Np, uint64_t _Dp> 3384 _LIBCPP_INLINE_VISIBILITY 3385 typename enable_if 3386 < 3387 __uratio<_Np, _Dp>::num <= 0xFFFFFFFFFFFFFFFFull / (_Max - _Min), 3388 result_type 3389 >::type 3390 __eval(__uratio<_Np, _Dp>) 3391 { 3392 const size_t __j = static_cast<size_t>(__uratio<_Np, _Dp>::num * (_Y_ - _Min) 3393 / __uratio<_Np, _Dp>::den); 3394 _Y_ = _V_[__j]; 3395 _V_[__j] = __e_(); 3396 return _Y_; 3397 } 3398 3399 template <uint64_t __n, uint64_t __d> 3400 _LIBCPP_INLINE_VISIBILITY 3401 result_type __evalf() 3402 { 3403 const double _Fp = __d == 0 ? 3404 __n / (2. * 0x8000000000000000ull) : 3405 __n / (double)__d; 3406 const size_t __j = static_cast<size_t>(_Fp * (_Y_ - _Min)); 3407 _Y_ = _V_[__j]; 3408 _V_[__j] = __e_(); 3409 return _Y_; 3410 } 3411}; 3412 3413template<class _Engine, size_t __k> 3414 _LIBCPP_CONSTEXPR const size_t shuffle_order_engine<_Engine, __k>::table_size; 3415 3416template<class _Eng, size_t _Kp> 3417bool 3418operator==( 3419 const shuffle_order_engine<_Eng, _Kp>& __x, 3420 const shuffle_order_engine<_Eng, _Kp>& __y) 3421{ 3422 return __x._Y_ == __y._Y_ && _VSTD::equal(__x._V_, __x._V_ + _Kp, __y._V_) && 3423 __x.__e_ == __y.__e_; 3424} 3425 3426template<class _Eng, size_t _Kp> 3427inline _LIBCPP_INLINE_VISIBILITY 3428bool 3429operator!=( 3430 const shuffle_order_engine<_Eng, _Kp>& __x, 3431 const shuffle_order_engine<_Eng, _Kp>& __y) 3432{ 3433 return !(__x == __y); 3434} 3435 3436template <class _CharT, class _Traits, 3437 class _Eng, size_t _Kp> 3438basic_ostream<_CharT, _Traits>& 3439operator<<(basic_ostream<_CharT, _Traits>& __os, 3440 const shuffle_order_engine<_Eng, _Kp>& __x) 3441{ 3442 __save_flags<_CharT, _Traits> __lx(__os); 3443 __os.flags(ios_base::dec | ios_base::left); 3444 _CharT __sp = __os.widen(' '); 3445 __os.fill(__sp); 3446 __os << __x.__e_ << __sp << __x._V_[0]; 3447 for (size_t __i = 1; __i < _Kp; ++__i) 3448 __os << __sp << __x._V_[__i]; 3449 return __os << __sp << __x._Y_; 3450} 3451 3452template <class _CharT, class _Traits, 3453 class _Eng, size_t _Kp> 3454basic_istream<_CharT, _Traits>& 3455operator>>(basic_istream<_CharT, _Traits>& __is, 3456 shuffle_order_engine<_Eng, _Kp>& __x) 3457{ 3458 typedef typename shuffle_order_engine<_Eng, _Kp>::result_type result_type; 3459 __save_flags<_CharT, _Traits> __lx(__is); 3460 __is.flags(ios_base::dec | ios_base::skipws); 3461 _Eng __e; 3462 result_type _Vp[_Kp+1]; 3463 __is >> __e; 3464 for (size_t __i = 0; __i < _Kp+1; ++__i) 3465 __is >> _Vp[__i]; 3466 if (!__is.fail()) 3467 { 3468 __x.__e_ = __e; 3469 for (size_t __i = 0; __i < _Kp; ++__i) 3470 __x._V_[__i] = _Vp[__i]; 3471 __x._Y_ = _Vp[_Kp]; 3472 } 3473 return __is; 3474} 3475 3476typedef shuffle_order_engine<minstd_rand0, 256> knuth_b; 3477 3478// random_device 3479 3480class _LIBCPP_TYPE_VIS random_device 3481{ 3482#ifdef _LIBCPP_USING_DEV_RANDOM 3483 int __f_; 3484#endif // defined(_LIBCPP_USING_DEV_RANDOM) 3485public: 3486 // types 3487 typedef unsigned result_type; 3488 3489 // generator characteristics 3490 static _LIBCPP_CONSTEXPR const result_type _Min = 0; 3491 static _LIBCPP_CONSTEXPR const result_type _Max = 0xFFFFFFFFu; 3492 3493 _LIBCPP_INLINE_VISIBILITY 3494 static _LIBCPP_CONSTEXPR result_type min() { return _Min;} 3495 _LIBCPP_INLINE_VISIBILITY 3496 static _LIBCPP_CONSTEXPR result_type max() { return _Max;} 3497 3498 // constructors 3499 explicit random_device(const string& __token = "/dev/urandom"); 3500 ~random_device(); 3501 3502 // generating functions 3503 result_type operator()(); 3504 3505 // property functions 3506 double entropy() const _NOEXCEPT; 3507 3508private: 3509 // no copy functions 3510 random_device(const random_device&); // = delete; 3511 random_device& operator=(const random_device&); // = delete; 3512}; 3513 3514// seed_seq 3515 3516class _LIBCPP_TEMPLATE_VIS seed_seq 3517{ 3518public: 3519 // types 3520 typedef uint32_t result_type; 3521 3522private: 3523 vector<result_type> __v_; 3524 3525 template<class _InputIterator> 3526 void init(_InputIterator __first, _InputIterator __last); 3527public: 3528 // constructors 3529 _LIBCPP_INLINE_VISIBILITY 3530 seed_seq() _NOEXCEPT {} 3531#ifndef _LIBCPP_CXX03_LANG 3532 template<class _Tp> 3533 _LIBCPP_INLINE_VISIBILITY 3534 seed_seq(initializer_list<_Tp> __il) {init(__il.begin(), __il.end());} 3535#endif // _LIBCPP_CXX03_LANG 3536 3537 template<class _InputIterator> 3538 _LIBCPP_INLINE_VISIBILITY 3539 seed_seq(_InputIterator __first, _InputIterator __last) 3540 {init(__first, __last);} 3541 3542 // generating functions 3543 template<class _RandomAccessIterator> 3544 void generate(_RandomAccessIterator __first, _RandomAccessIterator __last); 3545 3546 // property functions 3547 _LIBCPP_INLINE_VISIBILITY 3548 size_t size() const _NOEXCEPT {return __v_.size();} 3549 template<class _OutputIterator> 3550 _LIBCPP_INLINE_VISIBILITY 3551 void param(_OutputIterator __dest) const 3552 {_VSTD::copy(__v_.begin(), __v_.end(), __dest);} 3553 3554private: 3555 // no copy functions 3556 seed_seq(const seed_seq&); // = delete; 3557 void operator=(const seed_seq&); // = delete; 3558 3559 _LIBCPP_INLINE_VISIBILITY 3560 static result_type _Tp(result_type __x) {return __x ^ (__x >> 27);} 3561}; 3562 3563template<class _InputIterator> 3564void 3565seed_seq::init(_InputIterator __first, _InputIterator __last) 3566{ 3567 for (_InputIterator __s = __first; __s != __last; ++__s) 3568 __v_.push_back(*__s & 0xFFFFFFFF); 3569} 3570 3571template<class _RandomAccessIterator> 3572void 3573seed_seq::generate(_RandomAccessIterator __first, _RandomAccessIterator __last) 3574{ 3575 if (__first != __last) 3576 { 3577 _VSTD::fill(__first, __last, 0x8b8b8b8b); 3578 const size_t __n = static_cast<size_t>(__last - __first); 3579 const size_t __s = __v_.size(); 3580 const size_t __t = (__n >= 623) ? 11 3581 : (__n >= 68) ? 7 3582 : (__n >= 39) ? 5 3583 : (__n >= 7) ? 3 3584 : (__n - 1) / 2; 3585 const size_t __p = (__n - __t) / 2; 3586 const size_t __q = __p + __t; 3587 const size_t __m = _VSTD::max(__s + 1, __n); 3588 // __k = 0; 3589 { 3590 result_type __r = 1664525 * _Tp(__first[0] ^ __first[__p] 3591 ^ __first[__n - 1]); 3592 __first[__p] += __r; 3593 __r += __s; 3594 __first[__q] += __r; 3595 __first[0] = __r; 3596 } 3597 for (size_t __k = 1; __k <= __s; ++__k) 3598 { 3599 const size_t __kmodn = __k % __n; 3600 const size_t __kpmodn = (__k + __p) % __n; 3601 result_type __r = 1664525 * _Tp(__first[__kmodn] ^ __first[__kpmodn] 3602 ^ __first[(__k - 1) % __n]); 3603 __first[__kpmodn] += __r; 3604 __r += __kmodn + __v_[__k-1]; 3605 __first[(__k + __q) % __n] += __r; 3606 __first[__kmodn] = __r; 3607 } 3608 for (size_t __k = __s + 1; __k < __m; ++__k) 3609 { 3610 const size_t __kmodn = __k % __n; 3611 const size_t __kpmodn = (__k + __p) % __n; 3612 result_type __r = 1664525 * _Tp(__first[__kmodn] ^ __first[__kpmodn] 3613 ^ __first[(__k - 1) % __n]); 3614 __first[__kpmodn] += __r; 3615 __r += __kmodn; 3616 __first[(__k + __q) % __n] += __r; 3617 __first[__kmodn] = __r; 3618 } 3619 for (size_t __k = __m; __k < __m + __n; ++__k) 3620 { 3621 const size_t __kmodn = __k % __n; 3622 const size_t __kpmodn = (__k + __p) % __n; 3623 result_type __r = 1566083941 * _Tp(__first[__kmodn] + 3624 __first[__kpmodn] + 3625 __first[(__k - 1) % __n]); 3626 __first[__kpmodn] ^= __r; 3627 __r -= __kmodn; 3628 __first[(__k + __q) % __n] ^= __r; 3629 __first[__kmodn] = __r; 3630 } 3631 } 3632} 3633 3634// generate_canonical 3635 3636template<class _RealType, size_t __bits, class _URNG> 3637_RealType 3638generate_canonical(_URNG& __g) 3639{ 3640 const size_t _Dt = numeric_limits<_RealType>::digits; 3641 const size_t __b = _Dt < __bits ? _Dt : __bits; 3642#ifdef _LIBCPP_CXX03_LANG 3643 const size_t __logR = __log2<uint64_t, _URNG::_Max - _URNG::_Min + uint64_t(1)>::value; 3644#else 3645 const size_t __logR = __log2<uint64_t, _URNG::max() - _URNG::min() + uint64_t(1)>::value; 3646#endif 3647 const size_t __k = __b / __logR + (__b % __logR != 0) + (__b == 0); 3648 const _RealType _Rp = static_cast<_RealType>(_URNG::max() - _URNG::min()) + _RealType(1); 3649 _RealType __base = _Rp; 3650 _RealType _Sp = __g() - _URNG::min(); 3651 for (size_t __i = 1; __i < __k; ++__i, __base *= _Rp) 3652 _Sp += (__g() - _URNG::min()) * __base; 3653 return _Sp / __base; 3654} 3655 3656// uniform_int_distribution 3657 3658// in <algorithm> 3659 3660template <class _CharT, class _Traits, class _IT> 3661basic_ostream<_CharT, _Traits>& 3662operator<<(basic_ostream<_CharT, _Traits>& __os, 3663 const uniform_int_distribution<_IT>& __x) 3664{ 3665 __save_flags<_CharT, _Traits> __lx(__os); 3666 __os.flags(ios_base::dec | ios_base::left); 3667 _CharT __sp = __os.widen(' '); 3668 __os.fill(__sp); 3669 return __os << __x.a() << __sp << __x.b(); 3670} 3671 3672template <class _CharT, class _Traits, class _IT> 3673basic_istream<_CharT, _Traits>& 3674operator>>(basic_istream<_CharT, _Traits>& __is, 3675 uniform_int_distribution<_IT>& __x) 3676{ 3677 typedef uniform_int_distribution<_IT> _Eng; 3678 typedef typename _Eng::result_type result_type; 3679 typedef typename _Eng::param_type param_type; 3680 __save_flags<_CharT, _Traits> __lx(__is); 3681 __is.flags(ios_base::dec | ios_base::skipws); 3682 result_type __a; 3683 result_type __b; 3684 __is >> __a >> __b; 3685 if (!__is.fail()) 3686 __x.param(param_type(__a, __b)); 3687 return __is; 3688} 3689 3690// uniform_real_distribution 3691 3692template<class _RealType = double> 3693class _LIBCPP_TEMPLATE_VIS uniform_real_distribution 3694{ 3695public: 3696 // types 3697 typedef _RealType result_type; 3698 3699 class _LIBCPP_TEMPLATE_VIS param_type 3700 { 3701 result_type __a_; 3702 result_type __b_; 3703 public: 3704 typedef uniform_real_distribution distribution_type; 3705 3706 _LIBCPP_INLINE_VISIBILITY 3707 explicit param_type(result_type __a = 0, 3708 result_type __b = 1) 3709 : __a_(__a), __b_(__b) {} 3710 3711 _LIBCPP_INLINE_VISIBILITY 3712 result_type a() const {return __a_;} 3713 _LIBCPP_INLINE_VISIBILITY 3714 result_type b() const {return __b_;} 3715 3716 friend _LIBCPP_INLINE_VISIBILITY 3717 bool operator==(const param_type& __x, const param_type& __y) 3718 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 3719 friend _LIBCPP_INLINE_VISIBILITY 3720 bool operator!=(const param_type& __x, const param_type& __y) 3721 {return !(__x == __y);} 3722 }; 3723 3724private: 3725 param_type __p_; 3726 3727public: 3728 // constructors and reset functions 3729 _LIBCPP_INLINE_VISIBILITY 3730 explicit uniform_real_distribution(result_type __a = 0, result_type __b = 1) 3731 : __p_(param_type(__a, __b)) {} 3732 _LIBCPP_INLINE_VISIBILITY 3733 explicit uniform_real_distribution(const param_type& __p) : __p_(__p) {} 3734 _LIBCPP_INLINE_VISIBILITY 3735 void reset() {} 3736 3737 // generating functions 3738 template<class _URNG> 3739 _LIBCPP_INLINE_VISIBILITY 3740 result_type operator()(_URNG& __g) 3741 {return (*this)(__g, __p_);} 3742 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 3743 3744 // property functions 3745 _LIBCPP_INLINE_VISIBILITY 3746 result_type a() const {return __p_.a();} 3747 _LIBCPP_INLINE_VISIBILITY 3748 result_type b() const {return __p_.b();} 3749 3750 _LIBCPP_INLINE_VISIBILITY 3751 param_type param() const {return __p_;} 3752 _LIBCPP_INLINE_VISIBILITY 3753 void param(const param_type& __p) {__p_ = __p;} 3754 3755 _LIBCPP_INLINE_VISIBILITY 3756 result_type min() const {return a();} 3757 _LIBCPP_INLINE_VISIBILITY 3758 result_type max() const {return b();} 3759 3760 friend _LIBCPP_INLINE_VISIBILITY 3761 bool operator==(const uniform_real_distribution& __x, 3762 const uniform_real_distribution& __y) 3763 {return __x.__p_ == __y.__p_;} 3764 friend _LIBCPP_INLINE_VISIBILITY 3765 bool operator!=(const uniform_real_distribution& __x, 3766 const uniform_real_distribution& __y) 3767 {return !(__x == __y);} 3768}; 3769 3770template<class _RealType> 3771template<class _URNG> 3772inline 3773typename uniform_real_distribution<_RealType>::result_type 3774uniform_real_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 3775{ 3776 return (__p.b() - __p.a()) 3777 * _VSTD::generate_canonical<_RealType, numeric_limits<_RealType>::digits>(__g) 3778 + __p.a(); 3779} 3780 3781template <class _CharT, class _Traits, class _RT> 3782basic_ostream<_CharT, _Traits>& 3783operator<<(basic_ostream<_CharT, _Traits>& __os, 3784 const uniform_real_distribution<_RT>& __x) 3785{ 3786 __save_flags<_CharT, _Traits> __lx(__os); 3787 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 3788 ios_base::scientific); 3789 _CharT __sp = __os.widen(' '); 3790 __os.fill(__sp); 3791 return __os << __x.a() << __sp << __x.b(); 3792} 3793 3794template <class _CharT, class _Traits, class _RT> 3795basic_istream<_CharT, _Traits>& 3796operator>>(basic_istream<_CharT, _Traits>& __is, 3797 uniform_real_distribution<_RT>& __x) 3798{ 3799 typedef uniform_real_distribution<_RT> _Eng; 3800 typedef typename _Eng::result_type result_type; 3801 typedef typename _Eng::param_type param_type; 3802 __save_flags<_CharT, _Traits> __lx(__is); 3803 __is.flags(ios_base::dec | ios_base::skipws); 3804 result_type __a; 3805 result_type __b; 3806 __is >> __a >> __b; 3807 if (!__is.fail()) 3808 __x.param(param_type(__a, __b)); 3809 return __is; 3810} 3811 3812// bernoulli_distribution 3813 3814class _LIBCPP_TEMPLATE_VIS bernoulli_distribution 3815{ 3816public: 3817 // types 3818 typedef bool result_type; 3819 3820 class _LIBCPP_TEMPLATE_VIS param_type 3821 { 3822 double __p_; 3823 public: 3824 typedef bernoulli_distribution distribution_type; 3825 3826 _LIBCPP_INLINE_VISIBILITY 3827 explicit param_type(double __p = 0.5) : __p_(__p) {} 3828 3829 _LIBCPP_INLINE_VISIBILITY 3830 double p() const {return __p_;} 3831 3832 friend _LIBCPP_INLINE_VISIBILITY 3833 bool operator==(const param_type& __x, const param_type& __y) 3834 {return __x.__p_ == __y.__p_;} 3835 friend _LIBCPP_INLINE_VISIBILITY 3836 bool operator!=(const param_type& __x, const param_type& __y) 3837 {return !(__x == __y);} 3838 }; 3839 3840private: 3841 param_type __p_; 3842 3843public: 3844 // constructors and reset functions 3845 _LIBCPP_INLINE_VISIBILITY 3846 explicit bernoulli_distribution(double __p = 0.5) 3847 : __p_(param_type(__p)) {} 3848 _LIBCPP_INLINE_VISIBILITY 3849 explicit bernoulli_distribution(const param_type& __p) : __p_(__p) {} 3850 _LIBCPP_INLINE_VISIBILITY 3851 void reset() {} 3852 3853 // generating functions 3854 template<class _URNG> 3855 _LIBCPP_INLINE_VISIBILITY 3856 result_type operator()(_URNG& __g) 3857 {return (*this)(__g, __p_);} 3858 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 3859 3860 // property functions 3861 _LIBCPP_INLINE_VISIBILITY 3862 double p() const {return __p_.p();} 3863 3864 _LIBCPP_INLINE_VISIBILITY 3865 param_type param() const {return __p_;} 3866 _LIBCPP_INLINE_VISIBILITY 3867 void param(const param_type& __p) {__p_ = __p;} 3868 3869 _LIBCPP_INLINE_VISIBILITY 3870 result_type min() const {return false;} 3871 _LIBCPP_INLINE_VISIBILITY 3872 result_type max() const {return true;} 3873 3874 friend _LIBCPP_INLINE_VISIBILITY 3875 bool operator==(const bernoulli_distribution& __x, 3876 const bernoulli_distribution& __y) 3877 {return __x.__p_ == __y.__p_;} 3878 friend _LIBCPP_INLINE_VISIBILITY 3879 bool operator!=(const bernoulli_distribution& __x, 3880 const bernoulli_distribution& __y) 3881 {return !(__x == __y);} 3882}; 3883 3884template<class _URNG> 3885inline 3886bernoulli_distribution::result_type 3887bernoulli_distribution::operator()(_URNG& __g, const param_type& __p) 3888{ 3889 uniform_real_distribution<double> __gen; 3890 return __gen(__g) < __p.p(); 3891} 3892 3893template <class _CharT, class _Traits> 3894basic_ostream<_CharT, _Traits>& 3895operator<<(basic_ostream<_CharT, _Traits>& __os, const bernoulli_distribution& __x) 3896{ 3897 __save_flags<_CharT, _Traits> __lx(__os); 3898 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 3899 ios_base::scientific); 3900 _CharT __sp = __os.widen(' '); 3901 __os.fill(__sp); 3902 return __os << __x.p(); 3903} 3904 3905template <class _CharT, class _Traits> 3906basic_istream<_CharT, _Traits>& 3907operator>>(basic_istream<_CharT, _Traits>& __is, bernoulli_distribution& __x) 3908{ 3909 typedef bernoulli_distribution _Eng; 3910 typedef typename _Eng::param_type param_type; 3911 __save_flags<_CharT, _Traits> __lx(__is); 3912 __is.flags(ios_base::dec | ios_base::skipws); 3913 double __p; 3914 __is >> __p; 3915 if (!__is.fail()) 3916 __x.param(param_type(__p)); 3917 return __is; 3918} 3919 3920// binomial_distribution 3921 3922template<class _IntType = int> 3923class _LIBCPP_TEMPLATE_VIS binomial_distribution 3924{ 3925public: 3926 // types 3927 typedef _IntType result_type; 3928 3929 class _LIBCPP_TEMPLATE_VIS param_type 3930 { 3931 result_type __t_; 3932 double __p_; 3933 double __pr_; 3934 double __odds_ratio_; 3935 result_type __r0_; 3936 public: 3937 typedef binomial_distribution distribution_type; 3938 3939 explicit param_type(result_type __t = 1, double __p = 0.5); 3940 3941 _LIBCPP_INLINE_VISIBILITY 3942 result_type t() const {return __t_;} 3943 _LIBCPP_INLINE_VISIBILITY 3944 double p() const {return __p_;} 3945 3946 friend _LIBCPP_INLINE_VISIBILITY 3947 bool operator==(const param_type& __x, const param_type& __y) 3948 {return __x.__t_ == __y.__t_ && __x.__p_ == __y.__p_;} 3949 friend _LIBCPP_INLINE_VISIBILITY 3950 bool operator!=(const param_type& __x, const param_type& __y) 3951 {return !(__x == __y);} 3952 3953 friend class binomial_distribution; 3954 }; 3955 3956private: 3957 param_type __p_; 3958 3959public: 3960 // constructors and reset functions 3961 _LIBCPP_INLINE_VISIBILITY 3962 explicit binomial_distribution(result_type __t = 1, double __p = 0.5) 3963 : __p_(param_type(__t, __p)) {} 3964 _LIBCPP_INLINE_VISIBILITY 3965 explicit binomial_distribution(const param_type& __p) : __p_(__p) {} 3966 _LIBCPP_INLINE_VISIBILITY 3967 void reset() {} 3968 3969 // generating functions 3970 template<class _URNG> 3971 _LIBCPP_INLINE_VISIBILITY 3972 result_type operator()(_URNG& __g) 3973 {return (*this)(__g, __p_);} 3974 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 3975 3976 // property functions 3977 _LIBCPP_INLINE_VISIBILITY 3978 result_type t() const {return __p_.t();} 3979 _LIBCPP_INLINE_VISIBILITY 3980 double p() const {return __p_.p();} 3981 3982 _LIBCPP_INLINE_VISIBILITY 3983 param_type param() const {return __p_;} 3984 _LIBCPP_INLINE_VISIBILITY 3985 void param(const param_type& __p) {__p_ = __p;} 3986 3987 _LIBCPP_INLINE_VISIBILITY 3988 result_type min() const {return 0;} 3989 _LIBCPP_INLINE_VISIBILITY 3990 result_type max() const {return t();} 3991 3992 friend _LIBCPP_INLINE_VISIBILITY 3993 bool operator==(const binomial_distribution& __x, 3994 const binomial_distribution& __y) 3995 {return __x.__p_ == __y.__p_;} 3996 friend _LIBCPP_INLINE_VISIBILITY 3997 bool operator!=(const binomial_distribution& __x, 3998 const binomial_distribution& __y) 3999 {return !(__x == __y);} 4000}; 4001 4002#ifndef _LIBCPP_MSVCRT 4003extern "C" double lgamma_r(double, int *); 4004#endif 4005 4006inline _LIBCPP_INLINE_VISIBILITY double __libcpp_lgamma(double __d) { 4007#if defined(_LIBCPP_MSVCRT) 4008 return lgamma(__d); 4009#else 4010 int __sign; 4011 return lgamma_r(__d, &__sign); 4012#endif 4013} 4014 4015template<class _IntType> 4016binomial_distribution<_IntType>::param_type::param_type(const result_type __t, const double __p) 4017 : __t_(__t), __p_(__p) 4018{ 4019 if (0 < __p_ && __p_ < 1) 4020 { 4021 __r0_ = static_cast<result_type>((__t_ + 1) * __p_); 4022 __pr_ = _VSTD::exp(__libcpp_lgamma(__t_ + 1.) - 4023 __libcpp_lgamma(__r0_ + 1.) - 4024 __libcpp_lgamma(__t_ - __r0_ + 1.) + __r0_ * _VSTD::log(__p_) + 4025 (__t_ - __r0_) * _VSTD::log(1 - __p_)); 4026 __odds_ratio_ = __p_ / (1 - __p_); 4027 } 4028} 4029 4030// Reference: Kemp, C.D. (1986). `A modal method for generating binomial 4031// variables', Commun. Statist. - Theor. Meth. 15(3), 805-813. 4032template<class _IntType> 4033template<class _URNG> 4034_IntType 4035binomial_distribution<_IntType>::operator()(_URNG& __g, const param_type& __pr) 4036{ 4037 if (__pr.__t_ == 0 || __pr.__p_ == 0) 4038 return 0; 4039 if (__pr.__p_ == 1) 4040 return __pr.__t_; 4041 uniform_real_distribution<double> __gen; 4042 double __u = __gen(__g) - __pr.__pr_; 4043 if (__u < 0) 4044 return __pr.__r0_; 4045 double __pu = __pr.__pr_; 4046 double __pd = __pu; 4047 result_type __ru = __pr.__r0_; 4048 result_type __rd = __ru; 4049 while (true) 4050 { 4051 bool __break = true; 4052 if (__rd >= 1) 4053 { 4054 __pd *= __rd / (__pr.__odds_ratio_ * (__pr.__t_ - __rd + 1)); 4055 __u -= __pd; 4056 __break = false; 4057 if (__u < 0) 4058 return __rd - 1; 4059 } 4060 if ( __rd != 0 ) 4061 --__rd; 4062 ++__ru; 4063 if (__ru <= __pr.__t_) 4064 { 4065 __pu *= (__pr.__t_ - __ru + 1) * __pr.__odds_ratio_ / __ru; 4066 __u -= __pu; 4067 __break = false; 4068 if (__u < 0) 4069 return __ru; 4070 } 4071 if (__break) 4072 return 0; 4073 } 4074} 4075 4076template <class _CharT, class _Traits, class _IntType> 4077basic_ostream<_CharT, _Traits>& 4078operator<<(basic_ostream<_CharT, _Traits>& __os, 4079 const binomial_distribution<_IntType>& __x) 4080{ 4081 __save_flags<_CharT, _Traits> __lx(__os); 4082 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4083 ios_base::scientific); 4084 _CharT __sp = __os.widen(' '); 4085 __os.fill(__sp); 4086 return __os << __x.t() << __sp << __x.p(); 4087} 4088 4089template <class _CharT, class _Traits, class _IntType> 4090basic_istream<_CharT, _Traits>& 4091operator>>(basic_istream<_CharT, _Traits>& __is, 4092 binomial_distribution<_IntType>& __x) 4093{ 4094 typedef binomial_distribution<_IntType> _Eng; 4095 typedef typename _Eng::result_type result_type; 4096 typedef typename _Eng::param_type param_type; 4097 __save_flags<_CharT, _Traits> __lx(__is); 4098 __is.flags(ios_base::dec | ios_base::skipws); 4099 result_type __t; 4100 double __p; 4101 __is >> __t >> __p; 4102 if (!__is.fail()) 4103 __x.param(param_type(__t, __p)); 4104 return __is; 4105} 4106 4107// exponential_distribution 4108 4109template<class _RealType = double> 4110class _LIBCPP_TEMPLATE_VIS exponential_distribution 4111{ 4112public: 4113 // types 4114 typedef _RealType result_type; 4115 4116 class _LIBCPP_TEMPLATE_VIS param_type 4117 { 4118 result_type __lambda_; 4119 public: 4120 typedef exponential_distribution distribution_type; 4121 4122 _LIBCPP_INLINE_VISIBILITY 4123 explicit param_type(result_type __lambda = 1) : __lambda_(__lambda) {} 4124 4125 _LIBCPP_INLINE_VISIBILITY 4126 result_type lambda() const {return __lambda_;} 4127 4128 friend _LIBCPP_INLINE_VISIBILITY 4129 bool operator==(const param_type& __x, const param_type& __y) 4130 {return __x.__lambda_ == __y.__lambda_;} 4131 friend _LIBCPP_INLINE_VISIBILITY 4132 bool operator!=(const param_type& __x, const param_type& __y) 4133 {return !(__x == __y);} 4134 }; 4135 4136private: 4137 param_type __p_; 4138 4139public: 4140 // constructors and reset functions 4141 _LIBCPP_INLINE_VISIBILITY 4142 explicit exponential_distribution(result_type __lambda = 1) 4143 : __p_(param_type(__lambda)) {} 4144 _LIBCPP_INLINE_VISIBILITY 4145 explicit exponential_distribution(const param_type& __p) : __p_(__p) {} 4146 _LIBCPP_INLINE_VISIBILITY 4147 void reset() {} 4148 4149 // generating functions 4150 template<class _URNG> 4151 _LIBCPP_INLINE_VISIBILITY 4152 result_type operator()(_URNG& __g) 4153 {return (*this)(__g, __p_);} 4154 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4155 4156 // property functions 4157 _LIBCPP_INLINE_VISIBILITY 4158 result_type lambda() const {return __p_.lambda();} 4159 4160 _LIBCPP_INLINE_VISIBILITY 4161 param_type param() const {return __p_;} 4162 _LIBCPP_INLINE_VISIBILITY 4163 void param(const param_type& __p) {__p_ = __p;} 4164 4165 _LIBCPP_INLINE_VISIBILITY 4166 result_type min() const {return 0;} 4167 _LIBCPP_INLINE_VISIBILITY 4168 result_type max() const {return numeric_limits<result_type>::infinity();} 4169 4170 friend _LIBCPP_INLINE_VISIBILITY 4171 bool operator==(const exponential_distribution& __x, 4172 const exponential_distribution& __y) 4173 {return __x.__p_ == __y.__p_;} 4174 friend _LIBCPP_INLINE_VISIBILITY 4175 bool operator!=(const exponential_distribution& __x, 4176 const exponential_distribution& __y) 4177 {return !(__x == __y);} 4178}; 4179 4180template <class _RealType> 4181template<class _URNG> 4182_RealType 4183exponential_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4184{ 4185 return -_VSTD::log 4186 ( 4187 result_type(1) - 4188 _VSTD::generate_canonical<result_type, 4189 numeric_limits<result_type>::digits>(__g) 4190 ) 4191 / __p.lambda(); 4192} 4193 4194template <class _CharT, class _Traits, class _RealType> 4195basic_ostream<_CharT, _Traits>& 4196operator<<(basic_ostream<_CharT, _Traits>& __os, 4197 const exponential_distribution<_RealType>& __x) 4198{ 4199 __save_flags<_CharT, _Traits> __lx(__os); 4200 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4201 ios_base::scientific); 4202 return __os << __x.lambda(); 4203} 4204 4205template <class _CharT, class _Traits, class _RealType> 4206basic_istream<_CharT, _Traits>& 4207operator>>(basic_istream<_CharT, _Traits>& __is, 4208 exponential_distribution<_RealType>& __x) 4209{ 4210 typedef exponential_distribution<_RealType> _Eng; 4211 typedef typename _Eng::result_type result_type; 4212 typedef typename _Eng::param_type param_type; 4213 __save_flags<_CharT, _Traits> __lx(__is); 4214 __is.flags(ios_base::dec | ios_base::skipws); 4215 result_type __lambda; 4216 __is >> __lambda; 4217 if (!__is.fail()) 4218 __x.param(param_type(__lambda)); 4219 return __is; 4220} 4221 4222// normal_distribution 4223 4224template<class _RealType = double> 4225class _LIBCPP_TEMPLATE_VIS normal_distribution 4226{ 4227public: 4228 // types 4229 typedef _RealType result_type; 4230 4231 class _LIBCPP_TEMPLATE_VIS param_type 4232 { 4233 result_type __mean_; 4234 result_type __stddev_; 4235 public: 4236 typedef normal_distribution distribution_type; 4237 4238 _LIBCPP_INLINE_VISIBILITY 4239 explicit param_type(result_type __mean = 0, result_type __stddev = 1) 4240 : __mean_(__mean), __stddev_(__stddev) {} 4241 4242 _LIBCPP_INLINE_VISIBILITY 4243 result_type mean() const {return __mean_;} 4244 _LIBCPP_INLINE_VISIBILITY 4245 result_type stddev() const {return __stddev_;} 4246 4247 friend _LIBCPP_INLINE_VISIBILITY 4248 bool operator==(const param_type& __x, const param_type& __y) 4249 {return __x.__mean_ == __y.__mean_ && __x.__stddev_ == __y.__stddev_;} 4250 friend _LIBCPP_INLINE_VISIBILITY 4251 bool operator!=(const param_type& __x, const param_type& __y) 4252 {return !(__x == __y);} 4253 }; 4254 4255private: 4256 param_type __p_; 4257 result_type _V_; 4258 bool _V_hot_; 4259 4260public: 4261 // constructors and reset functions 4262 _LIBCPP_INLINE_VISIBILITY 4263 explicit normal_distribution(result_type __mean = 0, result_type __stddev = 1) 4264 : __p_(param_type(__mean, __stddev)), _V_hot_(false) {} 4265 _LIBCPP_INLINE_VISIBILITY 4266 explicit normal_distribution(const param_type& __p) 4267 : __p_(__p), _V_hot_(false) {} 4268 _LIBCPP_INLINE_VISIBILITY 4269 void reset() {_V_hot_ = false;} 4270 4271 // generating functions 4272 template<class _URNG> 4273 _LIBCPP_INLINE_VISIBILITY 4274 result_type operator()(_URNG& __g) 4275 {return (*this)(__g, __p_);} 4276 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4277 4278 // property functions 4279 _LIBCPP_INLINE_VISIBILITY 4280 result_type mean() const {return __p_.mean();} 4281 _LIBCPP_INLINE_VISIBILITY 4282 result_type stddev() const {return __p_.stddev();} 4283 4284 _LIBCPP_INLINE_VISIBILITY 4285 param_type param() const {return __p_;} 4286 _LIBCPP_INLINE_VISIBILITY 4287 void param(const param_type& __p) {__p_ = __p;} 4288 4289 _LIBCPP_INLINE_VISIBILITY 4290 result_type min() const {return -numeric_limits<result_type>::infinity();} 4291 _LIBCPP_INLINE_VISIBILITY 4292 result_type max() const {return numeric_limits<result_type>::infinity();} 4293 4294 friend _LIBCPP_INLINE_VISIBILITY 4295 bool operator==(const normal_distribution& __x, 4296 const normal_distribution& __y) 4297 {return __x.__p_ == __y.__p_ && __x._V_hot_ == __y._V_hot_ && 4298 (!__x._V_hot_ || __x._V_ == __y._V_);} 4299 friend _LIBCPP_INLINE_VISIBILITY 4300 bool operator!=(const normal_distribution& __x, 4301 const normal_distribution& __y) 4302 {return !(__x == __y);} 4303 4304 template <class _CharT, class _Traits, class _RT> 4305 friend 4306 basic_ostream<_CharT, _Traits>& 4307 operator<<(basic_ostream<_CharT, _Traits>& __os, 4308 const normal_distribution<_RT>& __x); 4309 4310 template <class _CharT, class _Traits, class _RT> 4311 friend 4312 basic_istream<_CharT, _Traits>& 4313 operator>>(basic_istream<_CharT, _Traits>& __is, 4314 normal_distribution<_RT>& __x); 4315}; 4316 4317template <class _RealType> 4318template<class _URNG> 4319_RealType 4320normal_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4321{ 4322 result_type _Up; 4323 if (_V_hot_) 4324 { 4325 _V_hot_ = false; 4326 _Up = _V_; 4327 } 4328 else 4329 { 4330 uniform_real_distribution<result_type> _Uni(-1, 1); 4331 result_type __u; 4332 result_type __v; 4333 result_type __s; 4334 do 4335 { 4336 __u = _Uni(__g); 4337 __v = _Uni(__g); 4338 __s = __u * __u + __v * __v; 4339 } while (__s > 1 || __s == 0); 4340 result_type _Fp = _VSTD::sqrt(-2 * _VSTD::log(__s) / __s); 4341 _V_ = __v * _Fp; 4342 _V_hot_ = true; 4343 _Up = __u * _Fp; 4344 } 4345 return _Up * __p.stddev() + __p.mean(); 4346} 4347 4348template <class _CharT, class _Traits, class _RT> 4349basic_ostream<_CharT, _Traits>& 4350operator<<(basic_ostream<_CharT, _Traits>& __os, 4351 const normal_distribution<_RT>& __x) 4352{ 4353 __save_flags<_CharT, _Traits> __lx(__os); 4354 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4355 ios_base::scientific); 4356 _CharT __sp = __os.widen(' '); 4357 __os.fill(__sp); 4358 __os << __x.mean() << __sp << __x.stddev() << __sp << __x._V_hot_; 4359 if (__x._V_hot_) 4360 __os << __sp << __x._V_; 4361 return __os; 4362} 4363 4364template <class _CharT, class _Traits, class _RT> 4365basic_istream<_CharT, _Traits>& 4366operator>>(basic_istream<_CharT, _Traits>& __is, 4367 normal_distribution<_RT>& __x) 4368{ 4369 typedef normal_distribution<_RT> _Eng; 4370 typedef typename _Eng::result_type result_type; 4371 typedef typename _Eng::param_type param_type; 4372 __save_flags<_CharT, _Traits> __lx(__is); 4373 __is.flags(ios_base::dec | ios_base::skipws); 4374 result_type __mean; 4375 result_type __stddev; 4376 result_type _Vp = 0; 4377 bool _V_hot = false; 4378 __is >> __mean >> __stddev >> _V_hot; 4379 if (_V_hot) 4380 __is >> _Vp; 4381 if (!__is.fail()) 4382 { 4383 __x.param(param_type(__mean, __stddev)); 4384 __x._V_hot_ = _V_hot; 4385 __x._V_ = _Vp; 4386 } 4387 return __is; 4388} 4389 4390// lognormal_distribution 4391 4392template<class _RealType = double> 4393class _LIBCPP_TEMPLATE_VIS lognormal_distribution 4394{ 4395public: 4396 // types 4397 typedef _RealType result_type; 4398 4399 class _LIBCPP_TEMPLATE_VIS param_type 4400 { 4401 normal_distribution<result_type> __nd_; 4402 public: 4403 typedef lognormal_distribution distribution_type; 4404 4405 _LIBCPP_INLINE_VISIBILITY 4406 explicit param_type(result_type __m = 0, result_type __s = 1) 4407 : __nd_(__m, __s) {} 4408 4409 _LIBCPP_INLINE_VISIBILITY 4410 result_type m() const {return __nd_.mean();} 4411 _LIBCPP_INLINE_VISIBILITY 4412 result_type s() const {return __nd_.stddev();} 4413 4414 friend _LIBCPP_INLINE_VISIBILITY 4415 bool operator==(const param_type& __x, const param_type& __y) 4416 {return __x.__nd_ == __y.__nd_;} 4417 friend _LIBCPP_INLINE_VISIBILITY 4418 bool operator!=(const param_type& __x, const param_type& __y) 4419 {return !(__x == __y);} 4420 friend class lognormal_distribution; 4421 4422 template <class _CharT, class _Traits, class _RT> 4423 friend 4424 basic_ostream<_CharT, _Traits>& 4425 operator<<(basic_ostream<_CharT, _Traits>& __os, 4426 const lognormal_distribution<_RT>& __x); 4427 4428 template <class _CharT, class _Traits, class _RT> 4429 friend 4430 basic_istream<_CharT, _Traits>& 4431 operator>>(basic_istream<_CharT, _Traits>& __is, 4432 lognormal_distribution<_RT>& __x); 4433 }; 4434 4435private: 4436 param_type __p_; 4437 4438public: 4439 // constructor and reset functions 4440 _LIBCPP_INLINE_VISIBILITY 4441 explicit lognormal_distribution(result_type __m = 0, result_type __s = 1) 4442 : __p_(param_type(__m, __s)) {} 4443 _LIBCPP_INLINE_VISIBILITY 4444 explicit lognormal_distribution(const param_type& __p) 4445 : __p_(__p) {} 4446 _LIBCPP_INLINE_VISIBILITY 4447 void reset() {__p_.__nd_.reset();} 4448 4449 // generating functions 4450 template<class _URNG> 4451 _LIBCPP_INLINE_VISIBILITY 4452 result_type operator()(_URNG& __g) 4453 {return (*this)(__g, __p_);} 4454 template<class _URNG> 4455 _LIBCPP_INLINE_VISIBILITY 4456 result_type operator()(_URNG& __g, const param_type& __p) 4457 {return _VSTD::exp(const_cast<normal_distribution<result_type>&>(__p.__nd_)(__g));} 4458 4459 // property functions 4460 _LIBCPP_INLINE_VISIBILITY 4461 result_type m() const {return __p_.m();} 4462 _LIBCPP_INLINE_VISIBILITY 4463 result_type s() const {return __p_.s();} 4464 4465 _LIBCPP_INLINE_VISIBILITY 4466 param_type param() const {return __p_;} 4467 _LIBCPP_INLINE_VISIBILITY 4468 void param(const param_type& __p) {__p_ = __p;} 4469 4470 _LIBCPP_INLINE_VISIBILITY 4471 result_type min() const {return 0;} 4472 _LIBCPP_INLINE_VISIBILITY 4473 result_type max() const {return numeric_limits<result_type>::infinity();} 4474 4475 friend _LIBCPP_INLINE_VISIBILITY 4476 bool operator==(const lognormal_distribution& __x, 4477 const lognormal_distribution& __y) 4478 {return __x.__p_ == __y.__p_;} 4479 friend _LIBCPP_INLINE_VISIBILITY 4480 bool operator!=(const lognormal_distribution& __x, 4481 const lognormal_distribution& __y) 4482 {return !(__x == __y);} 4483 4484 template <class _CharT, class _Traits, class _RT> 4485 friend 4486 basic_ostream<_CharT, _Traits>& 4487 operator<<(basic_ostream<_CharT, _Traits>& __os, 4488 const lognormal_distribution<_RT>& __x); 4489 4490 template <class _CharT, class _Traits, class _RT> 4491 friend 4492 basic_istream<_CharT, _Traits>& 4493 operator>>(basic_istream<_CharT, _Traits>& __is, 4494 lognormal_distribution<_RT>& __x); 4495}; 4496 4497template <class _CharT, class _Traits, class _RT> 4498inline _LIBCPP_INLINE_VISIBILITY 4499basic_ostream<_CharT, _Traits>& 4500operator<<(basic_ostream<_CharT, _Traits>& __os, 4501 const lognormal_distribution<_RT>& __x) 4502{ 4503 return __os << __x.__p_.__nd_; 4504} 4505 4506template <class _CharT, class _Traits, class _RT> 4507inline _LIBCPP_INLINE_VISIBILITY 4508basic_istream<_CharT, _Traits>& 4509operator>>(basic_istream<_CharT, _Traits>& __is, 4510 lognormal_distribution<_RT>& __x) 4511{ 4512 return __is >> __x.__p_.__nd_; 4513} 4514 4515// poisson_distribution 4516 4517template<class _IntType = int> 4518class _LIBCPP_TEMPLATE_VIS poisson_distribution 4519{ 4520public: 4521 // types 4522 typedef _IntType result_type; 4523 4524 class _LIBCPP_TEMPLATE_VIS param_type 4525 { 4526 double __mean_; 4527 double __s_; 4528 double __d_; 4529 double __l_; 4530 double __omega_; 4531 double __c0_; 4532 double __c1_; 4533 double __c2_; 4534 double __c3_; 4535 double __c_; 4536 4537 public: 4538 typedef poisson_distribution distribution_type; 4539 4540 explicit param_type(double __mean = 1.0); 4541 4542 _LIBCPP_INLINE_VISIBILITY 4543 double mean() const {return __mean_;} 4544 4545 friend _LIBCPP_INLINE_VISIBILITY 4546 bool operator==(const param_type& __x, const param_type& __y) 4547 {return __x.__mean_ == __y.__mean_;} 4548 friend _LIBCPP_INLINE_VISIBILITY 4549 bool operator!=(const param_type& __x, const param_type& __y) 4550 {return !(__x == __y);} 4551 4552 friend class poisson_distribution; 4553 }; 4554 4555private: 4556 param_type __p_; 4557 4558public: 4559 // constructors and reset functions 4560 _LIBCPP_INLINE_VISIBILITY 4561 explicit poisson_distribution(double __mean = 1.0) : __p_(__mean) {} 4562 _LIBCPP_INLINE_VISIBILITY 4563 explicit poisson_distribution(const param_type& __p) : __p_(__p) {} 4564 _LIBCPP_INLINE_VISIBILITY 4565 void reset() {} 4566 4567 // generating functions 4568 template<class _URNG> 4569 _LIBCPP_INLINE_VISIBILITY 4570 result_type operator()(_URNG& __g) 4571 {return (*this)(__g, __p_);} 4572 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4573 4574 // property functions 4575 _LIBCPP_INLINE_VISIBILITY 4576 double mean() const {return __p_.mean();} 4577 4578 _LIBCPP_INLINE_VISIBILITY 4579 param_type param() const {return __p_;} 4580 _LIBCPP_INLINE_VISIBILITY 4581 void param(const param_type& __p) {__p_ = __p;} 4582 4583 _LIBCPP_INLINE_VISIBILITY 4584 result_type min() const {return 0;} 4585 _LIBCPP_INLINE_VISIBILITY 4586 result_type max() const {return numeric_limits<result_type>::max();} 4587 4588 friend _LIBCPP_INLINE_VISIBILITY 4589 bool operator==(const poisson_distribution& __x, 4590 const poisson_distribution& __y) 4591 {return __x.__p_ == __y.__p_;} 4592 friend _LIBCPP_INLINE_VISIBILITY 4593 bool operator!=(const poisson_distribution& __x, 4594 const poisson_distribution& __y) 4595 {return !(__x == __y);} 4596}; 4597 4598template<class _IntType> 4599poisson_distribution<_IntType>::param_type::param_type(double __mean) 4600 // According to the standard `inf` is a valid input, but it causes the 4601 // distribution to hang, so we replace it with the maximum representable 4602 // mean. 4603 : __mean_(isinf(__mean) ? numeric_limits<double>::max() : __mean) 4604{ 4605 if (__mean_ < 10) 4606 { 4607 __s_ = 0; 4608 __d_ = 0; 4609 __l_ = _VSTD::exp(-__mean_); 4610 __omega_ = 0; 4611 __c3_ = 0; 4612 __c2_ = 0; 4613 __c1_ = 0; 4614 __c0_ = 0; 4615 __c_ = 0; 4616 } 4617 else 4618 { 4619 __s_ = _VSTD::sqrt(__mean_); 4620 __d_ = 6 * __mean_ * __mean_; 4621 __l_ = std::trunc(__mean_ - 1.1484); 4622 __omega_ = .3989423 / __s_; 4623 double __b1_ = .4166667E-1 / __mean_; 4624 double __b2_ = .3 * __b1_ * __b1_; 4625 __c3_ = .1428571 * __b1_ * __b2_; 4626 __c2_ = __b2_ - 15. * __c3_; 4627 __c1_ = __b1_ - 6. * __b2_ + 45. * __c3_; 4628 __c0_ = 1. - __b1_ + 3. * __b2_ - 15. * __c3_; 4629 __c_ = .1069 / __mean_; 4630 } 4631} 4632 4633template <class _IntType> 4634template<class _URNG> 4635_IntType 4636poisson_distribution<_IntType>::operator()(_URNG& __urng, const param_type& __pr) 4637{ 4638 double __tx; 4639 uniform_real_distribution<double> __urd; 4640 if (__pr.__mean_ < 10) 4641 { 4642 __tx = 0; 4643 for (double __p = __urd(__urng); __p > __pr.__l_; ++__tx) 4644 __p *= __urd(__urng); 4645 } 4646 else 4647 { 4648 double __difmuk; 4649 double __g = __pr.__mean_ + __pr.__s_ * normal_distribution<double>()(__urng); 4650 double __u; 4651 if (__g > 0) 4652 { 4653 __tx = std::trunc(__g); 4654 if (__tx >= __pr.__l_) 4655 return std::__clamp_to_integral<result_type>(__tx); 4656 __difmuk = __pr.__mean_ - __tx; 4657 __u = __urd(__urng); 4658 if (__pr.__d_ * __u >= __difmuk * __difmuk * __difmuk) 4659 return std::__clamp_to_integral<result_type>(__tx); 4660 } 4661 exponential_distribution<double> __edist; 4662 for (bool __using_exp_dist = false; true; __using_exp_dist = true) 4663 { 4664 double __e; 4665 if (__using_exp_dist || __g <= 0) 4666 { 4667 double __t; 4668 do 4669 { 4670 __e = __edist(__urng); 4671 __u = __urd(__urng); 4672 __u += __u - 1; 4673 __t = 1.8 + (__u < 0 ? -__e : __e); 4674 } while (__t <= -.6744); 4675 __tx = std::trunc(__pr.__mean_ + __pr.__s_ * __t); 4676 __difmuk = __pr.__mean_ - __tx; 4677 __using_exp_dist = true; 4678 } 4679 double __px; 4680 double __py; 4681 if (__tx < 10 && __tx >= 0) 4682 { 4683 const double __fac[] = {1, 1, 2, 6, 24, 120, 720, 5040, 4684 40320, 362880}; 4685 __px = -__pr.__mean_; 4686 __py = _VSTD::pow(__pr.__mean_, (double)__tx) / __fac[static_cast<int>(__tx)]; 4687 } 4688 else 4689 { 4690 double __del = .8333333E-1 / __tx; 4691 __del -= 4.8 * __del * __del * __del; 4692 double __v = __difmuk / __tx; 4693 if (_VSTD::abs(__v) > 0.25) 4694 __px = __tx * _VSTD::log(1 + __v) - __difmuk - __del; 4695 else 4696 __px = __tx * __v * __v * (((((((.1250060 * __v + -.1384794) * 4697 __v + .1421878) * __v + -.1661269) * __v + .2000118) * 4698 __v + -.2500068) * __v + .3333333) * __v + -.5) - __del; 4699 __py = .3989423 / _VSTD::sqrt(__tx); 4700 } 4701 double __r = (0.5 - __difmuk) / __pr.__s_; 4702 double __r2 = __r * __r; 4703 double __fx = -0.5 * __r2; 4704 double __fy = __pr.__omega_ * (((__pr.__c3_ * __r2 + __pr.__c2_) * 4705 __r2 + __pr.__c1_) * __r2 + __pr.__c0_); 4706 if (__using_exp_dist) 4707 { 4708 if (__pr.__c_ * _VSTD::abs(__u) <= __py * _VSTD::exp(__px + __e) - 4709 __fy * _VSTD::exp(__fx + __e)) 4710 break; 4711 } 4712 else 4713 { 4714 if (__fy - __u * __fy <= __py * _VSTD::exp(__px - __fx)) 4715 break; 4716 } 4717 } 4718 } 4719 return std::__clamp_to_integral<result_type>(__tx); 4720} 4721 4722template <class _CharT, class _Traits, class _IntType> 4723basic_ostream<_CharT, _Traits>& 4724operator<<(basic_ostream<_CharT, _Traits>& __os, 4725 const poisson_distribution<_IntType>& __x) 4726{ 4727 __save_flags<_CharT, _Traits> __lx(__os); 4728 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4729 ios_base::scientific); 4730 return __os << __x.mean(); 4731} 4732 4733template <class _CharT, class _Traits, class _IntType> 4734basic_istream<_CharT, _Traits>& 4735operator>>(basic_istream<_CharT, _Traits>& __is, 4736 poisson_distribution<_IntType>& __x) 4737{ 4738 typedef poisson_distribution<_IntType> _Eng; 4739 typedef typename _Eng::param_type param_type; 4740 __save_flags<_CharT, _Traits> __lx(__is); 4741 __is.flags(ios_base::dec | ios_base::skipws); 4742 double __mean; 4743 __is >> __mean; 4744 if (!__is.fail()) 4745 __x.param(param_type(__mean)); 4746 return __is; 4747} 4748 4749// weibull_distribution 4750 4751template<class _RealType = double> 4752class _LIBCPP_TEMPLATE_VIS weibull_distribution 4753{ 4754public: 4755 // types 4756 typedef _RealType result_type; 4757 4758 class _LIBCPP_TEMPLATE_VIS param_type 4759 { 4760 result_type __a_; 4761 result_type __b_; 4762 public: 4763 typedef weibull_distribution distribution_type; 4764 4765 _LIBCPP_INLINE_VISIBILITY 4766 explicit param_type(result_type __a = 1, result_type __b = 1) 4767 : __a_(__a), __b_(__b) {} 4768 4769 _LIBCPP_INLINE_VISIBILITY 4770 result_type a() const {return __a_;} 4771 _LIBCPP_INLINE_VISIBILITY 4772 result_type b() const {return __b_;} 4773 4774 friend _LIBCPP_INLINE_VISIBILITY 4775 bool operator==(const param_type& __x, const param_type& __y) 4776 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 4777 friend _LIBCPP_INLINE_VISIBILITY 4778 bool operator!=(const param_type& __x, const param_type& __y) 4779 {return !(__x == __y);} 4780 }; 4781 4782private: 4783 param_type __p_; 4784 4785public: 4786 // constructor and reset functions 4787 _LIBCPP_INLINE_VISIBILITY 4788 explicit weibull_distribution(result_type __a = 1, result_type __b = 1) 4789 : __p_(param_type(__a, __b)) {} 4790 _LIBCPP_INLINE_VISIBILITY 4791 explicit weibull_distribution(const param_type& __p) 4792 : __p_(__p) {} 4793 _LIBCPP_INLINE_VISIBILITY 4794 void reset() {} 4795 4796 // generating functions 4797 template<class _URNG> 4798 _LIBCPP_INLINE_VISIBILITY 4799 result_type operator()(_URNG& __g) 4800 {return (*this)(__g, __p_);} 4801 template<class _URNG> 4802 _LIBCPP_INLINE_VISIBILITY 4803 result_type operator()(_URNG& __g, const param_type& __p) 4804 {return __p.b() * 4805 _VSTD::pow(exponential_distribution<result_type>()(__g), 1/__p.a());} 4806 4807 // property functions 4808 _LIBCPP_INLINE_VISIBILITY 4809 result_type a() const {return __p_.a();} 4810 _LIBCPP_INLINE_VISIBILITY 4811 result_type b() const {return __p_.b();} 4812 4813 _LIBCPP_INLINE_VISIBILITY 4814 param_type param() const {return __p_;} 4815 _LIBCPP_INLINE_VISIBILITY 4816 void param(const param_type& __p) {__p_ = __p;} 4817 4818 _LIBCPP_INLINE_VISIBILITY 4819 result_type min() const {return 0;} 4820 _LIBCPP_INLINE_VISIBILITY 4821 result_type max() const {return numeric_limits<result_type>::infinity();} 4822 4823 friend _LIBCPP_INLINE_VISIBILITY 4824 bool operator==(const weibull_distribution& __x, 4825 const weibull_distribution& __y) 4826 {return __x.__p_ == __y.__p_;} 4827 friend _LIBCPP_INLINE_VISIBILITY 4828 bool operator!=(const weibull_distribution& __x, 4829 const weibull_distribution& __y) 4830 {return !(__x == __y);} 4831}; 4832 4833template <class _CharT, class _Traits, class _RT> 4834basic_ostream<_CharT, _Traits>& 4835operator<<(basic_ostream<_CharT, _Traits>& __os, 4836 const weibull_distribution<_RT>& __x) 4837{ 4838 __save_flags<_CharT, _Traits> __lx(__os); 4839 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4840 ios_base::scientific); 4841 _CharT __sp = __os.widen(' '); 4842 __os.fill(__sp); 4843 __os << __x.a() << __sp << __x.b(); 4844 return __os; 4845} 4846 4847template <class _CharT, class _Traits, class _RT> 4848basic_istream<_CharT, _Traits>& 4849operator>>(basic_istream<_CharT, _Traits>& __is, 4850 weibull_distribution<_RT>& __x) 4851{ 4852 typedef weibull_distribution<_RT> _Eng; 4853 typedef typename _Eng::result_type result_type; 4854 typedef typename _Eng::param_type param_type; 4855 __save_flags<_CharT, _Traits> __lx(__is); 4856 __is.flags(ios_base::dec | ios_base::skipws); 4857 result_type __a; 4858 result_type __b; 4859 __is >> __a >> __b; 4860 if (!__is.fail()) 4861 __x.param(param_type(__a, __b)); 4862 return __is; 4863} 4864 4865template<class _RealType = double> 4866class _LIBCPP_TEMPLATE_VIS extreme_value_distribution 4867{ 4868public: 4869 // types 4870 typedef _RealType result_type; 4871 4872 class _LIBCPP_TEMPLATE_VIS param_type 4873 { 4874 result_type __a_; 4875 result_type __b_; 4876 public: 4877 typedef extreme_value_distribution distribution_type; 4878 4879 _LIBCPP_INLINE_VISIBILITY 4880 explicit param_type(result_type __a = 0, result_type __b = 1) 4881 : __a_(__a), __b_(__b) {} 4882 4883 _LIBCPP_INLINE_VISIBILITY 4884 result_type a() const {return __a_;} 4885 _LIBCPP_INLINE_VISIBILITY 4886 result_type b() const {return __b_;} 4887 4888 friend _LIBCPP_INLINE_VISIBILITY 4889 bool operator==(const param_type& __x, const param_type& __y) 4890 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 4891 friend _LIBCPP_INLINE_VISIBILITY 4892 bool operator!=(const param_type& __x, const param_type& __y) 4893 {return !(__x == __y);} 4894 }; 4895 4896private: 4897 param_type __p_; 4898 4899public: 4900 // constructor and reset functions 4901 _LIBCPP_INLINE_VISIBILITY 4902 explicit extreme_value_distribution(result_type __a = 0, result_type __b = 1) 4903 : __p_(param_type(__a, __b)) {} 4904 _LIBCPP_INLINE_VISIBILITY 4905 explicit extreme_value_distribution(const param_type& __p) 4906 : __p_(__p) {} 4907 _LIBCPP_INLINE_VISIBILITY 4908 void reset() {} 4909 4910 // generating functions 4911 template<class _URNG> 4912 _LIBCPP_INLINE_VISIBILITY 4913 result_type operator()(_URNG& __g) 4914 {return (*this)(__g, __p_);} 4915 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 4916 4917 // property functions 4918 _LIBCPP_INLINE_VISIBILITY 4919 result_type a() const {return __p_.a();} 4920 _LIBCPP_INLINE_VISIBILITY 4921 result_type b() const {return __p_.b();} 4922 4923 _LIBCPP_INLINE_VISIBILITY 4924 param_type param() const {return __p_;} 4925 _LIBCPP_INLINE_VISIBILITY 4926 void param(const param_type& __p) {__p_ = __p;} 4927 4928 _LIBCPP_INLINE_VISIBILITY 4929 result_type min() const {return -numeric_limits<result_type>::infinity();} 4930 _LIBCPP_INLINE_VISIBILITY 4931 result_type max() const {return numeric_limits<result_type>::infinity();} 4932 4933 friend _LIBCPP_INLINE_VISIBILITY 4934 bool operator==(const extreme_value_distribution& __x, 4935 const extreme_value_distribution& __y) 4936 {return __x.__p_ == __y.__p_;} 4937 friend _LIBCPP_INLINE_VISIBILITY 4938 bool operator!=(const extreme_value_distribution& __x, 4939 const extreme_value_distribution& __y) 4940 {return !(__x == __y);} 4941}; 4942 4943template<class _RealType> 4944template<class _URNG> 4945_RealType 4946extreme_value_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 4947{ 4948 return __p.a() - __p.b() * 4949 _VSTD::log(-_VSTD::log(1-uniform_real_distribution<result_type>()(__g))); 4950} 4951 4952template <class _CharT, class _Traits, class _RT> 4953basic_ostream<_CharT, _Traits>& 4954operator<<(basic_ostream<_CharT, _Traits>& __os, 4955 const extreme_value_distribution<_RT>& __x) 4956{ 4957 __save_flags<_CharT, _Traits> __lx(__os); 4958 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 4959 ios_base::scientific); 4960 _CharT __sp = __os.widen(' '); 4961 __os.fill(__sp); 4962 __os << __x.a() << __sp << __x.b(); 4963 return __os; 4964} 4965 4966template <class _CharT, class _Traits, class _RT> 4967basic_istream<_CharT, _Traits>& 4968operator>>(basic_istream<_CharT, _Traits>& __is, 4969 extreme_value_distribution<_RT>& __x) 4970{ 4971 typedef extreme_value_distribution<_RT> _Eng; 4972 typedef typename _Eng::result_type result_type; 4973 typedef typename _Eng::param_type param_type; 4974 __save_flags<_CharT, _Traits> __lx(__is); 4975 __is.flags(ios_base::dec | ios_base::skipws); 4976 result_type __a; 4977 result_type __b; 4978 __is >> __a >> __b; 4979 if (!__is.fail()) 4980 __x.param(param_type(__a, __b)); 4981 return __is; 4982} 4983 4984// gamma_distribution 4985 4986template<class _RealType = double> 4987class _LIBCPP_TEMPLATE_VIS gamma_distribution 4988{ 4989public: 4990 // types 4991 typedef _RealType result_type; 4992 4993 class _LIBCPP_TEMPLATE_VIS param_type 4994 { 4995 result_type __alpha_; 4996 result_type __beta_; 4997 public: 4998 typedef gamma_distribution distribution_type; 4999 5000 _LIBCPP_INLINE_VISIBILITY 5001 explicit param_type(result_type __alpha = 1, result_type __beta = 1) 5002 : __alpha_(__alpha), __beta_(__beta) {} 5003 5004 _LIBCPP_INLINE_VISIBILITY 5005 result_type alpha() const {return __alpha_;} 5006 _LIBCPP_INLINE_VISIBILITY 5007 result_type beta() const {return __beta_;} 5008 5009 friend _LIBCPP_INLINE_VISIBILITY 5010 bool operator==(const param_type& __x, const param_type& __y) 5011 {return __x.__alpha_ == __y.__alpha_ && __x.__beta_ == __y.__beta_;} 5012 friend _LIBCPP_INLINE_VISIBILITY 5013 bool operator!=(const param_type& __x, const param_type& __y) 5014 {return !(__x == __y);} 5015 }; 5016 5017private: 5018 param_type __p_; 5019 5020public: 5021 // constructors and reset functions 5022 _LIBCPP_INLINE_VISIBILITY 5023 explicit gamma_distribution(result_type __alpha = 1, result_type __beta = 1) 5024 : __p_(param_type(__alpha, __beta)) {} 5025 _LIBCPP_INLINE_VISIBILITY 5026 explicit gamma_distribution(const param_type& __p) 5027 : __p_(__p) {} 5028 _LIBCPP_INLINE_VISIBILITY 5029 void reset() {} 5030 5031 // generating functions 5032 template<class _URNG> 5033 _LIBCPP_INLINE_VISIBILITY 5034 result_type operator()(_URNG& __g) 5035 {return (*this)(__g, __p_);} 5036 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5037 5038 // property functions 5039 _LIBCPP_INLINE_VISIBILITY 5040 result_type alpha() const {return __p_.alpha();} 5041 _LIBCPP_INLINE_VISIBILITY 5042 result_type beta() const {return __p_.beta();} 5043 5044 _LIBCPP_INLINE_VISIBILITY 5045 param_type param() const {return __p_;} 5046 _LIBCPP_INLINE_VISIBILITY 5047 void param(const param_type& __p) {__p_ = __p;} 5048 5049 _LIBCPP_INLINE_VISIBILITY 5050 result_type min() const {return 0;} 5051 _LIBCPP_INLINE_VISIBILITY 5052 result_type max() const {return numeric_limits<result_type>::infinity();} 5053 5054 friend _LIBCPP_INLINE_VISIBILITY 5055 bool operator==(const gamma_distribution& __x, 5056 const gamma_distribution& __y) 5057 {return __x.__p_ == __y.__p_;} 5058 friend _LIBCPP_INLINE_VISIBILITY 5059 bool operator!=(const gamma_distribution& __x, 5060 const gamma_distribution& __y) 5061 {return !(__x == __y);} 5062}; 5063 5064template <class _RealType> 5065template<class _URNG> 5066_RealType 5067gamma_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5068{ 5069 result_type __a = __p.alpha(); 5070 uniform_real_distribution<result_type> __gen(0, 1); 5071 exponential_distribution<result_type> __egen; 5072 result_type __x; 5073 if (__a == 1) 5074 __x = __egen(__g); 5075 else if (__a > 1) 5076 { 5077 const result_type __b = __a - 1; 5078 const result_type __c = 3 * __a - result_type(0.75); 5079 while (true) 5080 { 5081 const result_type __u = __gen(__g); 5082 const result_type __v = __gen(__g); 5083 const result_type __w = __u * (1 - __u); 5084 if (__w != 0) 5085 { 5086 const result_type __y = _VSTD::sqrt(__c / __w) * 5087 (__u - result_type(0.5)); 5088 __x = __b + __y; 5089 if (__x >= 0) 5090 { 5091 const result_type __z = 64 * __w * __w * __w * __v * __v; 5092 if (__z <= 1 - 2 * __y * __y / __x) 5093 break; 5094 if (_VSTD::log(__z) <= 2 * (__b * _VSTD::log(__x / __b) - __y)) 5095 break; 5096 } 5097 } 5098 } 5099 } 5100 else // __a < 1 5101 { 5102 while (true) 5103 { 5104 const result_type __u = __gen(__g); 5105 const result_type __es = __egen(__g); 5106 if (__u <= 1 - __a) 5107 { 5108 __x = _VSTD::pow(__u, 1 / __a); 5109 if (__x <= __es) 5110 break; 5111 } 5112 else 5113 { 5114 const result_type __e = -_VSTD::log((1-__u)/__a); 5115 __x = _VSTD::pow(1 - __a + __a * __e, 1 / __a); 5116 if (__x <= __e + __es) 5117 break; 5118 } 5119 } 5120 } 5121 return __x * __p.beta(); 5122} 5123 5124template <class _CharT, class _Traits, class _RT> 5125basic_ostream<_CharT, _Traits>& 5126operator<<(basic_ostream<_CharT, _Traits>& __os, 5127 const gamma_distribution<_RT>& __x) 5128{ 5129 __save_flags<_CharT, _Traits> __lx(__os); 5130 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5131 ios_base::scientific); 5132 _CharT __sp = __os.widen(' '); 5133 __os.fill(__sp); 5134 __os << __x.alpha() << __sp << __x.beta(); 5135 return __os; 5136} 5137 5138template <class _CharT, class _Traits, class _RT> 5139basic_istream<_CharT, _Traits>& 5140operator>>(basic_istream<_CharT, _Traits>& __is, 5141 gamma_distribution<_RT>& __x) 5142{ 5143 typedef gamma_distribution<_RT> _Eng; 5144 typedef typename _Eng::result_type result_type; 5145 typedef typename _Eng::param_type param_type; 5146 __save_flags<_CharT, _Traits> __lx(__is); 5147 __is.flags(ios_base::dec | ios_base::skipws); 5148 result_type __alpha; 5149 result_type __beta; 5150 __is >> __alpha >> __beta; 5151 if (!__is.fail()) 5152 __x.param(param_type(__alpha, __beta)); 5153 return __is; 5154} 5155 5156// negative_binomial_distribution 5157 5158template<class _IntType = int> 5159class _LIBCPP_TEMPLATE_VIS negative_binomial_distribution 5160{ 5161public: 5162 // types 5163 typedef _IntType result_type; 5164 5165 class _LIBCPP_TEMPLATE_VIS param_type 5166 { 5167 result_type __k_; 5168 double __p_; 5169 public: 5170 typedef negative_binomial_distribution distribution_type; 5171 5172 _LIBCPP_INLINE_VISIBILITY 5173 explicit param_type(result_type __k = 1, double __p = 0.5) 5174 : __k_(__k), __p_(__p) {} 5175 5176 _LIBCPP_INLINE_VISIBILITY 5177 result_type k() const {return __k_;} 5178 _LIBCPP_INLINE_VISIBILITY 5179 double p() const {return __p_;} 5180 5181 friend _LIBCPP_INLINE_VISIBILITY 5182 bool operator==(const param_type& __x, const param_type& __y) 5183 {return __x.__k_ == __y.__k_ && __x.__p_ == __y.__p_;} 5184 friend _LIBCPP_INLINE_VISIBILITY 5185 bool operator!=(const param_type& __x, const param_type& __y) 5186 {return !(__x == __y);} 5187 }; 5188 5189private: 5190 param_type __p_; 5191 5192public: 5193 // constructor and reset functions 5194 _LIBCPP_INLINE_VISIBILITY 5195 explicit negative_binomial_distribution(result_type __k = 1, double __p = 0.5) 5196 : __p_(__k, __p) {} 5197 _LIBCPP_INLINE_VISIBILITY 5198 explicit negative_binomial_distribution(const param_type& __p) : __p_(__p) {} 5199 _LIBCPP_INLINE_VISIBILITY 5200 void reset() {} 5201 5202 // generating functions 5203 template<class _URNG> 5204 _LIBCPP_INLINE_VISIBILITY 5205 result_type operator()(_URNG& __g) 5206 {return (*this)(__g, __p_);} 5207 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5208 5209 // property functions 5210 _LIBCPP_INLINE_VISIBILITY 5211 result_type k() const {return __p_.k();} 5212 _LIBCPP_INLINE_VISIBILITY 5213 double p() const {return __p_.p();} 5214 5215 _LIBCPP_INLINE_VISIBILITY 5216 param_type param() const {return __p_;} 5217 _LIBCPP_INLINE_VISIBILITY 5218 void param(const param_type& __p) {__p_ = __p;} 5219 5220 _LIBCPP_INLINE_VISIBILITY 5221 result_type min() const {return 0;} 5222 _LIBCPP_INLINE_VISIBILITY 5223 result_type max() const {return numeric_limits<result_type>::max();} 5224 5225 friend _LIBCPP_INLINE_VISIBILITY 5226 bool operator==(const negative_binomial_distribution& __x, 5227 const negative_binomial_distribution& __y) 5228 {return __x.__p_ == __y.__p_;} 5229 friend _LIBCPP_INLINE_VISIBILITY 5230 bool operator!=(const negative_binomial_distribution& __x, 5231 const negative_binomial_distribution& __y) 5232 {return !(__x == __y);} 5233}; 5234 5235template <class _IntType> 5236template<class _URNG> 5237_IntType 5238negative_binomial_distribution<_IntType>::operator()(_URNG& __urng, const param_type& __pr) 5239{ 5240 result_type __k = __pr.k(); 5241 double __p = __pr.p(); 5242 if (__k <= 21 * __p) 5243 { 5244 bernoulli_distribution __gen(__p); 5245 result_type __f = 0; 5246 result_type __s = 0; 5247 while (__s < __k) 5248 { 5249 if (__gen(__urng)) 5250 ++__s; 5251 else 5252 ++__f; 5253 } 5254 return __f; 5255 } 5256 return poisson_distribution<result_type>(gamma_distribution<double> 5257 (__k, (1-__p)/__p)(__urng))(__urng); 5258} 5259 5260template <class _CharT, class _Traits, class _IntType> 5261basic_ostream<_CharT, _Traits>& 5262operator<<(basic_ostream<_CharT, _Traits>& __os, 5263 const negative_binomial_distribution<_IntType>& __x) 5264{ 5265 __save_flags<_CharT, _Traits> __lx(__os); 5266 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5267 ios_base::scientific); 5268 _CharT __sp = __os.widen(' '); 5269 __os.fill(__sp); 5270 return __os << __x.k() << __sp << __x.p(); 5271} 5272 5273template <class _CharT, class _Traits, class _IntType> 5274basic_istream<_CharT, _Traits>& 5275operator>>(basic_istream<_CharT, _Traits>& __is, 5276 negative_binomial_distribution<_IntType>& __x) 5277{ 5278 typedef negative_binomial_distribution<_IntType> _Eng; 5279 typedef typename _Eng::result_type result_type; 5280 typedef typename _Eng::param_type param_type; 5281 __save_flags<_CharT, _Traits> __lx(__is); 5282 __is.flags(ios_base::dec | ios_base::skipws); 5283 result_type __k; 5284 double __p; 5285 __is >> __k >> __p; 5286 if (!__is.fail()) 5287 __x.param(param_type(__k, __p)); 5288 return __is; 5289} 5290 5291// geometric_distribution 5292 5293template<class _IntType = int> 5294class _LIBCPP_TEMPLATE_VIS geometric_distribution 5295{ 5296public: 5297 // types 5298 typedef _IntType result_type; 5299 5300 class _LIBCPP_TEMPLATE_VIS param_type 5301 { 5302 double __p_; 5303 public: 5304 typedef geometric_distribution distribution_type; 5305 5306 _LIBCPP_INLINE_VISIBILITY 5307 explicit param_type(double __p = 0.5) : __p_(__p) {} 5308 5309 _LIBCPP_INLINE_VISIBILITY 5310 double p() const {return __p_;} 5311 5312 friend _LIBCPP_INLINE_VISIBILITY 5313 bool operator==(const param_type& __x, const param_type& __y) 5314 {return __x.__p_ == __y.__p_;} 5315 friend _LIBCPP_INLINE_VISIBILITY 5316 bool operator!=(const param_type& __x, const param_type& __y) 5317 {return !(__x == __y);} 5318 }; 5319 5320private: 5321 param_type __p_; 5322 5323public: 5324 // constructors and reset functions 5325 _LIBCPP_INLINE_VISIBILITY 5326 explicit geometric_distribution(double __p = 0.5) : __p_(__p) {} 5327 _LIBCPP_INLINE_VISIBILITY 5328 explicit geometric_distribution(const param_type& __p) : __p_(__p) {} 5329 _LIBCPP_INLINE_VISIBILITY 5330 void reset() {} 5331 5332 // generating functions 5333 template<class _URNG> 5334 _LIBCPP_INLINE_VISIBILITY 5335 result_type operator()(_URNG& __g) 5336 {return (*this)(__g, __p_);} 5337 template<class _URNG> 5338 _LIBCPP_INLINE_VISIBILITY 5339 result_type operator()(_URNG& __g, const param_type& __p) 5340 {return negative_binomial_distribution<result_type>(1, __p.p())(__g);} 5341 5342 // property functions 5343 _LIBCPP_INLINE_VISIBILITY 5344 double p() const {return __p_.p();} 5345 5346 _LIBCPP_INLINE_VISIBILITY 5347 param_type param() const {return __p_;} 5348 _LIBCPP_INLINE_VISIBILITY 5349 void param(const param_type& __p) {__p_ = __p;} 5350 5351 _LIBCPP_INLINE_VISIBILITY 5352 result_type min() const {return 0;} 5353 _LIBCPP_INLINE_VISIBILITY 5354 result_type max() const {return numeric_limits<result_type>::max();} 5355 5356 friend _LIBCPP_INLINE_VISIBILITY 5357 bool operator==(const geometric_distribution& __x, 5358 const geometric_distribution& __y) 5359 {return __x.__p_ == __y.__p_;} 5360 friend _LIBCPP_INLINE_VISIBILITY 5361 bool operator!=(const geometric_distribution& __x, 5362 const geometric_distribution& __y) 5363 {return !(__x == __y);} 5364}; 5365 5366template <class _CharT, class _Traits, class _IntType> 5367basic_ostream<_CharT, _Traits>& 5368operator<<(basic_ostream<_CharT, _Traits>& __os, 5369 const geometric_distribution<_IntType>& __x) 5370{ 5371 __save_flags<_CharT, _Traits> __lx(__os); 5372 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5373 ios_base::scientific); 5374 return __os << __x.p(); 5375} 5376 5377template <class _CharT, class _Traits, class _IntType> 5378basic_istream<_CharT, _Traits>& 5379operator>>(basic_istream<_CharT, _Traits>& __is, 5380 geometric_distribution<_IntType>& __x) 5381{ 5382 typedef geometric_distribution<_IntType> _Eng; 5383 typedef typename _Eng::param_type param_type; 5384 __save_flags<_CharT, _Traits> __lx(__is); 5385 __is.flags(ios_base::dec | ios_base::skipws); 5386 double __p; 5387 __is >> __p; 5388 if (!__is.fail()) 5389 __x.param(param_type(__p)); 5390 return __is; 5391} 5392 5393// chi_squared_distribution 5394 5395template<class _RealType = double> 5396class _LIBCPP_TEMPLATE_VIS chi_squared_distribution 5397{ 5398public: 5399 // types 5400 typedef _RealType result_type; 5401 5402 class _LIBCPP_TEMPLATE_VIS param_type 5403 { 5404 result_type __n_; 5405 public: 5406 typedef chi_squared_distribution distribution_type; 5407 5408 _LIBCPP_INLINE_VISIBILITY 5409 explicit param_type(result_type __n = 1) : __n_(__n) {} 5410 5411 _LIBCPP_INLINE_VISIBILITY 5412 result_type n() const {return __n_;} 5413 5414 friend _LIBCPP_INLINE_VISIBILITY 5415 bool operator==(const param_type& __x, const param_type& __y) 5416 {return __x.__n_ == __y.__n_;} 5417 friend _LIBCPP_INLINE_VISIBILITY 5418 bool operator!=(const param_type& __x, const param_type& __y) 5419 {return !(__x == __y);} 5420 }; 5421 5422private: 5423 param_type __p_; 5424 5425public: 5426 // constructor and reset functions 5427 _LIBCPP_INLINE_VISIBILITY 5428 explicit chi_squared_distribution(result_type __n = 1) 5429 : __p_(param_type(__n)) {} 5430 _LIBCPP_INLINE_VISIBILITY 5431 explicit chi_squared_distribution(const param_type& __p) 5432 : __p_(__p) {} 5433 _LIBCPP_INLINE_VISIBILITY 5434 void reset() {} 5435 5436 // generating functions 5437 template<class _URNG> 5438 _LIBCPP_INLINE_VISIBILITY 5439 result_type operator()(_URNG& __g) 5440 {return (*this)(__g, __p_);} 5441 template<class _URNG> 5442 _LIBCPP_INLINE_VISIBILITY 5443 result_type operator()(_URNG& __g, const param_type& __p) 5444 {return gamma_distribution<result_type>(__p.n() / 2, 2)(__g);} 5445 5446 // property functions 5447 _LIBCPP_INLINE_VISIBILITY 5448 result_type n() const {return __p_.n();} 5449 5450 _LIBCPP_INLINE_VISIBILITY 5451 param_type param() const {return __p_;} 5452 _LIBCPP_INLINE_VISIBILITY 5453 void param(const param_type& __p) {__p_ = __p;} 5454 5455 _LIBCPP_INLINE_VISIBILITY 5456 result_type min() const {return 0;} 5457 _LIBCPP_INLINE_VISIBILITY 5458 result_type max() const {return numeric_limits<result_type>::infinity();} 5459 5460 friend _LIBCPP_INLINE_VISIBILITY 5461 bool operator==(const chi_squared_distribution& __x, 5462 const chi_squared_distribution& __y) 5463 {return __x.__p_ == __y.__p_;} 5464 friend _LIBCPP_INLINE_VISIBILITY 5465 bool operator!=(const chi_squared_distribution& __x, 5466 const chi_squared_distribution& __y) 5467 {return !(__x == __y);} 5468}; 5469 5470template <class _CharT, class _Traits, class _RT> 5471basic_ostream<_CharT, _Traits>& 5472operator<<(basic_ostream<_CharT, _Traits>& __os, 5473 const chi_squared_distribution<_RT>& __x) 5474{ 5475 __save_flags<_CharT, _Traits> __lx(__os); 5476 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5477 ios_base::scientific); 5478 __os << __x.n(); 5479 return __os; 5480} 5481 5482template <class _CharT, class _Traits, class _RT> 5483basic_istream<_CharT, _Traits>& 5484operator>>(basic_istream<_CharT, _Traits>& __is, 5485 chi_squared_distribution<_RT>& __x) 5486{ 5487 typedef chi_squared_distribution<_RT> _Eng; 5488 typedef typename _Eng::result_type result_type; 5489 typedef typename _Eng::param_type param_type; 5490 __save_flags<_CharT, _Traits> __lx(__is); 5491 __is.flags(ios_base::dec | ios_base::skipws); 5492 result_type __n; 5493 __is >> __n; 5494 if (!__is.fail()) 5495 __x.param(param_type(__n)); 5496 return __is; 5497} 5498 5499// cauchy_distribution 5500 5501template<class _RealType = double> 5502class _LIBCPP_TEMPLATE_VIS cauchy_distribution 5503{ 5504public: 5505 // types 5506 typedef _RealType result_type; 5507 5508 class _LIBCPP_TEMPLATE_VIS param_type 5509 { 5510 result_type __a_; 5511 result_type __b_; 5512 public: 5513 typedef cauchy_distribution distribution_type; 5514 5515 _LIBCPP_INLINE_VISIBILITY 5516 explicit param_type(result_type __a = 0, result_type __b = 1) 5517 : __a_(__a), __b_(__b) {} 5518 5519 _LIBCPP_INLINE_VISIBILITY 5520 result_type a() const {return __a_;} 5521 _LIBCPP_INLINE_VISIBILITY 5522 result_type b() const {return __b_;} 5523 5524 friend _LIBCPP_INLINE_VISIBILITY 5525 bool operator==(const param_type& __x, const param_type& __y) 5526 {return __x.__a_ == __y.__a_ && __x.__b_ == __y.__b_;} 5527 friend _LIBCPP_INLINE_VISIBILITY 5528 bool operator!=(const param_type& __x, const param_type& __y) 5529 {return !(__x == __y);} 5530 }; 5531 5532private: 5533 param_type __p_; 5534 5535public: 5536 // constructor and reset functions 5537 _LIBCPP_INLINE_VISIBILITY 5538 explicit cauchy_distribution(result_type __a = 0, result_type __b = 1) 5539 : __p_(param_type(__a, __b)) {} 5540 _LIBCPP_INLINE_VISIBILITY 5541 explicit cauchy_distribution(const param_type& __p) 5542 : __p_(__p) {} 5543 _LIBCPP_INLINE_VISIBILITY 5544 void reset() {} 5545 5546 // generating functions 5547 template<class _URNG> 5548 _LIBCPP_INLINE_VISIBILITY 5549 result_type operator()(_URNG& __g) 5550 {return (*this)(__g, __p_);} 5551 template<class _URNG> _LIBCPP_INLINE_VISIBILITY result_type operator()(_URNG& __g, const param_type& __p); 5552 5553 // property functions 5554 _LIBCPP_INLINE_VISIBILITY 5555 result_type a() const {return __p_.a();} 5556 _LIBCPP_INLINE_VISIBILITY 5557 result_type b() const {return __p_.b();} 5558 5559 _LIBCPP_INLINE_VISIBILITY 5560 param_type param() const {return __p_;} 5561 _LIBCPP_INLINE_VISIBILITY 5562 void param(const param_type& __p) {__p_ = __p;} 5563 5564 _LIBCPP_INLINE_VISIBILITY 5565 result_type min() const {return -numeric_limits<result_type>::infinity();} 5566 _LIBCPP_INLINE_VISIBILITY 5567 result_type max() const {return numeric_limits<result_type>::infinity();} 5568 5569 friend _LIBCPP_INLINE_VISIBILITY 5570 bool operator==(const cauchy_distribution& __x, 5571 const cauchy_distribution& __y) 5572 {return __x.__p_ == __y.__p_;} 5573 friend _LIBCPP_INLINE_VISIBILITY 5574 bool operator!=(const cauchy_distribution& __x, 5575 const cauchy_distribution& __y) 5576 {return !(__x == __y);} 5577}; 5578 5579template <class _RealType> 5580template<class _URNG> 5581inline 5582_RealType 5583cauchy_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5584{ 5585 uniform_real_distribution<result_type> __gen; 5586 // purposefully let tan arg get as close to pi/2 as it wants, tan will return a finite 5587 return __p.a() + __p.b() * _VSTD::tan(3.1415926535897932384626433832795 * __gen(__g)); 5588} 5589 5590template <class _CharT, class _Traits, class _RT> 5591basic_ostream<_CharT, _Traits>& 5592operator<<(basic_ostream<_CharT, _Traits>& __os, 5593 const cauchy_distribution<_RT>& __x) 5594{ 5595 __save_flags<_CharT, _Traits> __lx(__os); 5596 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5597 ios_base::scientific); 5598 _CharT __sp = __os.widen(' '); 5599 __os.fill(__sp); 5600 __os << __x.a() << __sp << __x.b(); 5601 return __os; 5602} 5603 5604template <class _CharT, class _Traits, class _RT> 5605basic_istream<_CharT, _Traits>& 5606operator>>(basic_istream<_CharT, _Traits>& __is, 5607 cauchy_distribution<_RT>& __x) 5608{ 5609 typedef cauchy_distribution<_RT> _Eng; 5610 typedef typename _Eng::result_type result_type; 5611 typedef typename _Eng::param_type param_type; 5612 __save_flags<_CharT, _Traits> __lx(__is); 5613 __is.flags(ios_base::dec | ios_base::skipws); 5614 result_type __a; 5615 result_type __b; 5616 __is >> __a >> __b; 5617 if (!__is.fail()) 5618 __x.param(param_type(__a, __b)); 5619 return __is; 5620} 5621 5622// fisher_f_distribution 5623 5624template<class _RealType = double> 5625class _LIBCPP_TEMPLATE_VIS fisher_f_distribution 5626{ 5627public: 5628 // types 5629 typedef _RealType result_type; 5630 5631 class _LIBCPP_TEMPLATE_VIS param_type 5632 { 5633 result_type __m_; 5634 result_type __n_; 5635 public: 5636 typedef fisher_f_distribution distribution_type; 5637 5638 _LIBCPP_INLINE_VISIBILITY 5639 explicit param_type(result_type __m = 1, result_type __n = 1) 5640 : __m_(__m), __n_(__n) {} 5641 5642 _LIBCPP_INLINE_VISIBILITY 5643 result_type m() const {return __m_;} 5644 _LIBCPP_INLINE_VISIBILITY 5645 result_type n() const {return __n_;} 5646 5647 friend _LIBCPP_INLINE_VISIBILITY 5648 bool operator==(const param_type& __x, const param_type& __y) 5649 {return __x.__m_ == __y.__m_ && __x.__n_ == __y.__n_;} 5650 friend _LIBCPP_INLINE_VISIBILITY 5651 bool operator!=(const param_type& __x, const param_type& __y) 5652 {return !(__x == __y);} 5653 }; 5654 5655private: 5656 param_type __p_; 5657 5658public: 5659 // constructor and reset functions 5660 _LIBCPP_INLINE_VISIBILITY 5661 explicit fisher_f_distribution(result_type __m = 1, result_type __n = 1) 5662 : __p_(param_type(__m, __n)) {} 5663 _LIBCPP_INLINE_VISIBILITY 5664 explicit fisher_f_distribution(const param_type& __p) 5665 : __p_(__p) {} 5666 _LIBCPP_INLINE_VISIBILITY 5667 void reset() {} 5668 5669 // generating functions 5670 template<class _URNG> 5671 _LIBCPP_INLINE_VISIBILITY 5672 result_type operator()(_URNG& __g) 5673 {return (*this)(__g, __p_);} 5674 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5675 5676 // property functions 5677 _LIBCPP_INLINE_VISIBILITY 5678 result_type m() const {return __p_.m();} 5679 _LIBCPP_INLINE_VISIBILITY 5680 result_type n() const {return __p_.n();} 5681 5682 _LIBCPP_INLINE_VISIBILITY 5683 param_type param() const {return __p_;} 5684 _LIBCPP_INLINE_VISIBILITY 5685 void param(const param_type& __p) {__p_ = __p;} 5686 5687 _LIBCPP_INLINE_VISIBILITY 5688 result_type min() const {return 0;} 5689 _LIBCPP_INLINE_VISIBILITY 5690 result_type max() const {return numeric_limits<result_type>::infinity();} 5691 5692 friend _LIBCPP_INLINE_VISIBILITY 5693 bool operator==(const fisher_f_distribution& __x, 5694 const fisher_f_distribution& __y) 5695 {return __x.__p_ == __y.__p_;} 5696 friend _LIBCPP_INLINE_VISIBILITY 5697 bool operator!=(const fisher_f_distribution& __x, 5698 const fisher_f_distribution& __y) 5699 {return !(__x == __y);} 5700}; 5701 5702template <class _RealType> 5703template<class _URNG> 5704_RealType 5705fisher_f_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5706{ 5707 gamma_distribution<result_type> __gdm(__p.m() * result_type(.5)); 5708 gamma_distribution<result_type> __gdn(__p.n() * result_type(.5)); 5709 return __p.n() * __gdm(__g) / (__p.m() * __gdn(__g)); 5710} 5711 5712template <class _CharT, class _Traits, class _RT> 5713basic_ostream<_CharT, _Traits>& 5714operator<<(basic_ostream<_CharT, _Traits>& __os, 5715 const fisher_f_distribution<_RT>& __x) 5716{ 5717 __save_flags<_CharT, _Traits> __lx(__os); 5718 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5719 ios_base::scientific); 5720 _CharT __sp = __os.widen(' '); 5721 __os.fill(__sp); 5722 __os << __x.m() << __sp << __x.n(); 5723 return __os; 5724} 5725 5726template <class _CharT, class _Traits, class _RT> 5727basic_istream<_CharT, _Traits>& 5728operator>>(basic_istream<_CharT, _Traits>& __is, 5729 fisher_f_distribution<_RT>& __x) 5730{ 5731 typedef fisher_f_distribution<_RT> _Eng; 5732 typedef typename _Eng::result_type result_type; 5733 typedef typename _Eng::param_type param_type; 5734 __save_flags<_CharT, _Traits> __lx(__is); 5735 __is.flags(ios_base::dec | ios_base::skipws); 5736 result_type __m; 5737 result_type __n; 5738 __is >> __m >> __n; 5739 if (!__is.fail()) 5740 __x.param(param_type(__m, __n)); 5741 return __is; 5742} 5743 5744// student_t_distribution 5745 5746template<class _RealType = double> 5747class _LIBCPP_TEMPLATE_VIS student_t_distribution 5748{ 5749public: 5750 // types 5751 typedef _RealType result_type; 5752 5753 class _LIBCPP_TEMPLATE_VIS param_type 5754 { 5755 result_type __n_; 5756 public: 5757 typedef student_t_distribution distribution_type; 5758 5759 _LIBCPP_INLINE_VISIBILITY 5760 explicit param_type(result_type __n = 1) : __n_(__n) {} 5761 5762 _LIBCPP_INLINE_VISIBILITY 5763 result_type n() const {return __n_;} 5764 5765 friend _LIBCPP_INLINE_VISIBILITY 5766 bool operator==(const param_type& __x, const param_type& __y) 5767 {return __x.__n_ == __y.__n_;} 5768 friend _LIBCPP_INLINE_VISIBILITY 5769 bool operator!=(const param_type& __x, const param_type& __y) 5770 {return !(__x == __y);} 5771 }; 5772 5773private: 5774 param_type __p_; 5775 normal_distribution<result_type> __nd_; 5776 5777public: 5778 // constructor and reset functions 5779 _LIBCPP_INLINE_VISIBILITY 5780 explicit student_t_distribution(result_type __n = 1) 5781 : __p_(param_type(__n)) {} 5782 _LIBCPP_INLINE_VISIBILITY 5783 explicit student_t_distribution(const param_type& __p) 5784 : __p_(__p) {} 5785 _LIBCPP_INLINE_VISIBILITY 5786 void reset() {__nd_.reset();} 5787 5788 // generating functions 5789 template<class _URNG> 5790 _LIBCPP_INLINE_VISIBILITY 5791 result_type operator()(_URNG& __g) 5792 {return (*this)(__g, __p_);} 5793 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5794 5795 // property functions 5796 _LIBCPP_INLINE_VISIBILITY 5797 result_type n() const {return __p_.n();} 5798 5799 _LIBCPP_INLINE_VISIBILITY 5800 param_type param() const {return __p_;} 5801 _LIBCPP_INLINE_VISIBILITY 5802 void param(const param_type& __p) {__p_ = __p;} 5803 5804 _LIBCPP_INLINE_VISIBILITY 5805 result_type min() const {return -numeric_limits<result_type>::infinity();} 5806 _LIBCPP_INLINE_VISIBILITY 5807 result_type max() const {return numeric_limits<result_type>::infinity();} 5808 5809 friend _LIBCPP_INLINE_VISIBILITY 5810 bool operator==(const student_t_distribution& __x, 5811 const student_t_distribution& __y) 5812 {return __x.__p_ == __y.__p_;} 5813 friend _LIBCPP_INLINE_VISIBILITY 5814 bool operator!=(const student_t_distribution& __x, 5815 const student_t_distribution& __y) 5816 {return !(__x == __y);} 5817}; 5818 5819template <class _RealType> 5820template<class _URNG> 5821_RealType 5822student_t_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 5823{ 5824 gamma_distribution<result_type> __gd(__p.n() * .5, 2); 5825 return __nd_(__g) * _VSTD::sqrt(__p.n()/__gd(__g)); 5826} 5827 5828template <class _CharT, class _Traits, class _RT> 5829basic_ostream<_CharT, _Traits>& 5830operator<<(basic_ostream<_CharT, _Traits>& __os, 5831 const student_t_distribution<_RT>& __x) 5832{ 5833 __save_flags<_CharT, _Traits> __lx(__os); 5834 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 5835 ios_base::scientific); 5836 __os << __x.n(); 5837 return __os; 5838} 5839 5840template <class _CharT, class _Traits, class _RT> 5841basic_istream<_CharT, _Traits>& 5842operator>>(basic_istream<_CharT, _Traits>& __is, 5843 student_t_distribution<_RT>& __x) 5844{ 5845 typedef student_t_distribution<_RT> _Eng; 5846 typedef typename _Eng::result_type result_type; 5847 typedef typename _Eng::param_type param_type; 5848 __save_flags<_CharT, _Traits> __lx(__is); 5849 __is.flags(ios_base::dec | ios_base::skipws); 5850 result_type __n; 5851 __is >> __n; 5852 if (!__is.fail()) 5853 __x.param(param_type(__n)); 5854 return __is; 5855} 5856 5857// discrete_distribution 5858 5859template<class _IntType = int> 5860class _LIBCPP_TEMPLATE_VIS discrete_distribution 5861{ 5862public: 5863 // types 5864 typedef _IntType result_type; 5865 5866 class _LIBCPP_TEMPLATE_VIS param_type 5867 { 5868 vector<double> __p_; 5869 public: 5870 typedef discrete_distribution distribution_type; 5871 5872 _LIBCPP_INLINE_VISIBILITY 5873 param_type() {} 5874 template<class _InputIterator> 5875 _LIBCPP_INLINE_VISIBILITY 5876 param_type(_InputIterator __f, _InputIterator __l) 5877 : __p_(__f, __l) {__init();} 5878#ifndef _LIBCPP_CXX03_LANG 5879 _LIBCPP_INLINE_VISIBILITY 5880 param_type(initializer_list<double> __wl) 5881 : __p_(__wl.begin(), __wl.end()) {__init();} 5882#endif // _LIBCPP_CXX03_LANG 5883 template<class _UnaryOperation> 5884 param_type(size_t __nw, double __xmin, double __xmax, 5885 _UnaryOperation __fw); 5886 5887 vector<double> probabilities() const; 5888 5889 friend _LIBCPP_INLINE_VISIBILITY 5890 bool operator==(const param_type& __x, const param_type& __y) 5891 {return __x.__p_ == __y.__p_;} 5892 friend _LIBCPP_INLINE_VISIBILITY 5893 bool operator!=(const param_type& __x, const param_type& __y) 5894 {return !(__x == __y);} 5895 5896 private: 5897 void __init(); 5898 5899 friend class discrete_distribution; 5900 5901 template <class _CharT, class _Traits, class _IT> 5902 friend 5903 basic_ostream<_CharT, _Traits>& 5904 operator<<(basic_ostream<_CharT, _Traits>& __os, 5905 const discrete_distribution<_IT>& __x); 5906 5907 template <class _CharT, class _Traits, class _IT> 5908 friend 5909 basic_istream<_CharT, _Traits>& 5910 operator>>(basic_istream<_CharT, _Traits>& __is, 5911 discrete_distribution<_IT>& __x); 5912 }; 5913 5914private: 5915 param_type __p_; 5916 5917public: 5918 // constructor and reset functions 5919 _LIBCPP_INLINE_VISIBILITY 5920 discrete_distribution() {} 5921 template<class _InputIterator> 5922 _LIBCPP_INLINE_VISIBILITY 5923 discrete_distribution(_InputIterator __f, _InputIterator __l) 5924 : __p_(__f, __l) {} 5925#ifndef _LIBCPP_CXX03_LANG 5926 _LIBCPP_INLINE_VISIBILITY 5927 discrete_distribution(initializer_list<double> __wl) 5928 : __p_(__wl) {} 5929#endif // _LIBCPP_CXX03_LANG 5930 template<class _UnaryOperation> 5931 _LIBCPP_INLINE_VISIBILITY 5932 discrete_distribution(size_t __nw, double __xmin, double __xmax, 5933 _UnaryOperation __fw) 5934 : __p_(__nw, __xmin, __xmax, __fw) {} 5935 _LIBCPP_INLINE_VISIBILITY 5936 explicit discrete_distribution(const param_type& __p) 5937 : __p_(__p) {} 5938 _LIBCPP_INLINE_VISIBILITY 5939 void reset() {} 5940 5941 // generating functions 5942 template<class _URNG> 5943 _LIBCPP_INLINE_VISIBILITY 5944 result_type operator()(_URNG& __g) 5945 {return (*this)(__g, __p_);} 5946 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 5947 5948 // property functions 5949 _LIBCPP_INLINE_VISIBILITY 5950 vector<double> probabilities() const {return __p_.probabilities();} 5951 5952 _LIBCPP_INLINE_VISIBILITY 5953 param_type param() const {return __p_;} 5954 _LIBCPP_INLINE_VISIBILITY 5955 void param(const param_type& __p) {__p_ = __p;} 5956 5957 _LIBCPP_INLINE_VISIBILITY 5958 result_type min() const {return 0;} 5959 _LIBCPP_INLINE_VISIBILITY 5960 result_type max() const {return __p_.__p_.size();} 5961 5962 friend _LIBCPP_INLINE_VISIBILITY 5963 bool operator==(const discrete_distribution& __x, 5964 const discrete_distribution& __y) 5965 {return __x.__p_ == __y.__p_;} 5966 friend _LIBCPP_INLINE_VISIBILITY 5967 bool operator!=(const discrete_distribution& __x, 5968 const discrete_distribution& __y) 5969 {return !(__x == __y);} 5970 5971 template <class _CharT, class _Traits, class _IT> 5972 friend 5973 basic_ostream<_CharT, _Traits>& 5974 operator<<(basic_ostream<_CharT, _Traits>& __os, 5975 const discrete_distribution<_IT>& __x); 5976 5977 template <class _CharT, class _Traits, class _IT> 5978 friend 5979 basic_istream<_CharT, _Traits>& 5980 operator>>(basic_istream<_CharT, _Traits>& __is, 5981 discrete_distribution<_IT>& __x); 5982}; 5983 5984template<class _IntType> 5985template<class _UnaryOperation> 5986discrete_distribution<_IntType>::param_type::param_type(size_t __nw, 5987 double __xmin, 5988 double __xmax, 5989 _UnaryOperation __fw) 5990{ 5991 if (__nw > 1) 5992 { 5993 __p_.reserve(__nw - 1); 5994 double __d = (__xmax - __xmin) / __nw; 5995 double __d2 = __d / 2; 5996 for (size_t __k = 0; __k < __nw; ++__k) 5997 __p_.push_back(__fw(__xmin + __k * __d + __d2)); 5998 __init(); 5999 } 6000} 6001 6002template<class _IntType> 6003void 6004discrete_distribution<_IntType>::param_type::__init() 6005{ 6006 if (!__p_.empty()) 6007 { 6008 if (__p_.size() > 1) 6009 { 6010 double __s = _VSTD::accumulate(__p_.begin(), __p_.end(), 0.0); 6011 for (_VSTD::vector<double>::iterator __i = __p_.begin(), __e = __p_.end(); 6012 __i < __e; ++__i) 6013 *__i /= __s; 6014 vector<double> __t(__p_.size() - 1); 6015 _VSTD::partial_sum(__p_.begin(), __p_.end() - 1, __t.begin()); 6016 swap(__p_, __t); 6017 } 6018 else 6019 { 6020 __p_.clear(); 6021 __p_.shrink_to_fit(); 6022 } 6023 } 6024} 6025 6026template<class _IntType> 6027vector<double> 6028discrete_distribution<_IntType>::param_type::probabilities() const 6029{ 6030 size_t __n = __p_.size(); 6031 _VSTD::vector<double> __p(__n+1); 6032 _VSTD::adjacent_difference(__p_.begin(), __p_.end(), __p.begin()); 6033 if (__n > 0) 6034 __p[__n] = 1 - __p_[__n-1]; 6035 else 6036 __p[0] = 1; 6037 return __p; 6038} 6039 6040template<class _IntType> 6041template<class _URNG> 6042_IntType 6043discrete_distribution<_IntType>::operator()(_URNG& __g, const param_type& __p) 6044{ 6045 uniform_real_distribution<double> __gen; 6046 return static_cast<_IntType>( 6047 _VSTD::upper_bound(__p.__p_.begin(), __p.__p_.end(), __gen(__g)) - 6048 __p.__p_.begin()); 6049} 6050 6051template <class _CharT, class _Traits, class _IT> 6052basic_ostream<_CharT, _Traits>& 6053operator<<(basic_ostream<_CharT, _Traits>& __os, 6054 const discrete_distribution<_IT>& __x) 6055{ 6056 __save_flags<_CharT, _Traits> __lx(__os); 6057 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6058 ios_base::scientific); 6059 _CharT __sp = __os.widen(' '); 6060 __os.fill(__sp); 6061 size_t __n = __x.__p_.__p_.size(); 6062 __os << __n; 6063 for (size_t __i = 0; __i < __n; ++__i) 6064 __os << __sp << __x.__p_.__p_[__i]; 6065 return __os; 6066} 6067 6068template <class _CharT, class _Traits, class _IT> 6069basic_istream<_CharT, _Traits>& 6070operator>>(basic_istream<_CharT, _Traits>& __is, 6071 discrete_distribution<_IT>& __x) 6072{ 6073 __save_flags<_CharT, _Traits> __lx(__is); 6074 __is.flags(ios_base::dec | ios_base::skipws); 6075 size_t __n; 6076 __is >> __n; 6077 vector<double> __p(__n); 6078 for (size_t __i = 0; __i < __n; ++__i) 6079 __is >> __p[__i]; 6080 if (!__is.fail()) 6081 swap(__x.__p_.__p_, __p); 6082 return __is; 6083} 6084 6085// piecewise_constant_distribution 6086 6087template<class _RealType = double> 6088class _LIBCPP_TEMPLATE_VIS piecewise_constant_distribution 6089{ 6090public: 6091 // types 6092 typedef _RealType result_type; 6093 6094 class _LIBCPP_TEMPLATE_VIS param_type 6095 { 6096 vector<result_type> __b_; 6097 vector<result_type> __densities_; 6098 vector<result_type> __areas_; 6099 public: 6100 typedef piecewise_constant_distribution distribution_type; 6101 6102 param_type(); 6103 template<class _InputIteratorB, class _InputIteratorW> 6104 param_type(_InputIteratorB __fB, _InputIteratorB __lB, 6105 _InputIteratorW __fW); 6106#ifndef _LIBCPP_CXX03_LANG 6107 template<class _UnaryOperation> 6108 param_type(initializer_list<result_type> __bl, _UnaryOperation __fw); 6109#endif // _LIBCPP_CXX03_LANG 6110 template<class _UnaryOperation> 6111 param_type(size_t __nw, result_type __xmin, result_type __xmax, 6112 _UnaryOperation __fw); 6113 param_type(param_type const&) = default; 6114 param_type & operator=(const param_type& __rhs); 6115 6116 _LIBCPP_INLINE_VISIBILITY 6117 vector<result_type> intervals() const {return __b_;} 6118 _LIBCPP_INLINE_VISIBILITY 6119 vector<result_type> densities() const {return __densities_;} 6120 6121 friend _LIBCPP_INLINE_VISIBILITY 6122 bool operator==(const param_type& __x, const param_type& __y) 6123 {return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;} 6124 friend _LIBCPP_INLINE_VISIBILITY 6125 bool operator!=(const param_type& __x, const param_type& __y) 6126 {return !(__x == __y);} 6127 6128 private: 6129 void __init(); 6130 6131 friend class piecewise_constant_distribution; 6132 6133 template <class _CharT, class _Traits, class _RT> 6134 friend 6135 basic_ostream<_CharT, _Traits>& 6136 operator<<(basic_ostream<_CharT, _Traits>& __os, 6137 const piecewise_constant_distribution<_RT>& __x); 6138 6139 template <class _CharT, class _Traits, class _RT> 6140 friend 6141 basic_istream<_CharT, _Traits>& 6142 operator>>(basic_istream<_CharT, _Traits>& __is, 6143 piecewise_constant_distribution<_RT>& __x); 6144 }; 6145 6146private: 6147 param_type __p_; 6148 6149public: 6150 // constructor and reset functions 6151 _LIBCPP_INLINE_VISIBILITY 6152 piecewise_constant_distribution() {} 6153 template<class _InputIteratorB, class _InputIteratorW> 6154 _LIBCPP_INLINE_VISIBILITY 6155 piecewise_constant_distribution(_InputIteratorB __fB, 6156 _InputIteratorB __lB, 6157 _InputIteratorW __fW) 6158 : __p_(__fB, __lB, __fW) {} 6159 6160#ifndef _LIBCPP_CXX03_LANG 6161 template<class _UnaryOperation> 6162 _LIBCPP_INLINE_VISIBILITY 6163 piecewise_constant_distribution(initializer_list<result_type> __bl, 6164 _UnaryOperation __fw) 6165 : __p_(__bl, __fw) {} 6166#endif // _LIBCPP_CXX03_LANG 6167 6168 template<class _UnaryOperation> 6169 _LIBCPP_INLINE_VISIBILITY 6170 piecewise_constant_distribution(size_t __nw, result_type __xmin, 6171 result_type __xmax, _UnaryOperation __fw) 6172 : __p_(__nw, __xmin, __xmax, __fw) {} 6173 6174 _LIBCPP_INLINE_VISIBILITY 6175 explicit piecewise_constant_distribution(const param_type& __p) 6176 : __p_(__p) {} 6177 6178 _LIBCPP_INLINE_VISIBILITY 6179 void reset() {} 6180 6181 // generating functions 6182 template<class _URNG> 6183 _LIBCPP_INLINE_VISIBILITY 6184 result_type operator()(_URNG& __g) 6185 {return (*this)(__g, __p_);} 6186 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 6187 6188 // property functions 6189 _LIBCPP_INLINE_VISIBILITY 6190 vector<result_type> intervals() const {return __p_.intervals();} 6191 _LIBCPP_INLINE_VISIBILITY 6192 vector<result_type> densities() const {return __p_.densities();} 6193 6194 _LIBCPP_INLINE_VISIBILITY 6195 param_type param() const {return __p_;} 6196 _LIBCPP_INLINE_VISIBILITY 6197 void param(const param_type& __p) {__p_ = __p;} 6198 6199 _LIBCPP_INLINE_VISIBILITY 6200 result_type min() const {return __p_.__b_.front();} 6201 _LIBCPP_INLINE_VISIBILITY 6202 result_type max() const {return __p_.__b_.back();} 6203 6204 friend _LIBCPP_INLINE_VISIBILITY 6205 bool operator==(const piecewise_constant_distribution& __x, 6206 const piecewise_constant_distribution& __y) 6207 {return __x.__p_ == __y.__p_;} 6208 friend _LIBCPP_INLINE_VISIBILITY 6209 bool operator!=(const piecewise_constant_distribution& __x, 6210 const piecewise_constant_distribution& __y) 6211 {return !(__x == __y);} 6212 6213 template <class _CharT, class _Traits, class _RT> 6214 friend 6215 basic_ostream<_CharT, _Traits>& 6216 operator<<(basic_ostream<_CharT, _Traits>& __os, 6217 const piecewise_constant_distribution<_RT>& __x); 6218 6219 template <class _CharT, class _Traits, class _RT> 6220 friend 6221 basic_istream<_CharT, _Traits>& 6222 operator>>(basic_istream<_CharT, _Traits>& __is, 6223 piecewise_constant_distribution<_RT>& __x); 6224}; 6225 6226template<class _RealType> 6227typename piecewise_constant_distribution<_RealType>::param_type & 6228piecewise_constant_distribution<_RealType>::param_type::operator= 6229 (const param_type& __rhs) 6230{ 6231// These can throw 6232 __b_.reserve (__rhs.__b_.size ()); 6233 __densities_.reserve(__rhs.__densities_.size()); 6234 __areas_.reserve (__rhs.__areas_.size()); 6235 6236// These can not throw 6237 __b_ = __rhs.__b_; 6238 __densities_ = __rhs.__densities_; 6239 __areas_ = __rhs.__areas_; 6240 return *this; 6241} 6242 6243template<class _RealType> 6244void 6245piecewise_constant_distribution<_RealType>::param_type::__init() 6246{ 6247 // __densities_ contains non-normalized areas 6248 result_type __total_area = _VSTD::accumulate(__densities_.begin(), 6249 __densities_.end(), 6250 result_type()); 6251 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6252 __densities_[__i] /= __total_area; 6253 // __densities_ contains normalized areas 6254 __areas_.assign(__densities_.size(), result_type()); 6255 _VSTD::partial_sum(__densities_.begin(), __densities_.end() - 1, 6256 __areas_.begin() + 1); 6257 // __areas_ contains partial sums of normalized areas: [0, __densities_ - 1] 6258 __densities_.back() = 1 - __areas_.back(); // correct round off error 6259 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6260 __densities_[__i] /= (__b_[__i+1] - __b_[__i]); 6261 // __densities_ now contains __densities_ 6262} 6263 6264template<class _RealType> 6265piecewise_constant_distribution<_RealType>::param_type::param_type() 6266 : __b_(2), 6267 __densities_(1, 1.0), 6268 __areas_(1, 0.0) 6269{ 6270 __b_[1] = 1; 6271} 6272 6273template<class _RealType> 6274template<class _InputIteratorB, class _InputIteratorW> 6275piecewise_constant_distribution<_RealType>::param_type::param_type( 6276 _InputIteratorB __fB, _InputIteratorB __lB, _InputIteratorW __fW) 6277 : __b_(__fB, __lB) 6278{ 6279 if (__b_.size() < 2) 6280 { 6281 __b_.resize(2); 6282 __b_[0] = 0; 6283 __b_[1] = 1; 6284 __densities_.assign(1, 1.0); 6285 __areas_.assign(1, 0.0); 6286 } 6287 else 6288 { 6289 __densities_.reserve(__b_.size() - 1); 6290 for (size_t __i = 0; __i < __b_.size() - 1; ++__i, ++__fW) 6291 __densities_.push_back(*__fW); 6292 __init(); 6293 } 6294} 6295 6296#ifndef _LIBCPP_CXX03_LANG 6297 6298template<class _RealType> 6299template<class _UnaryOperation> 6300piecewise_constant_distribution<_RealType>::param_type::param_type( 6301 initializer_list<result_type> __bl, _UnaryOperation __fw) 6302 : __b_(__bl.begin(), __bl.end()) 6303{ 6304 if (__b_.size() < 2) 6305 { 6306 __b_.resize(2); 6307 __b_[0] = 0; 6308 __b_[1] = 1; 6309 __densities_.assign(1, 1.0); 6310 __areas_.assign(1, 0.0); 6311 } 6312 else 6313 { 6314 __densities_.reserve(__b_.size() - 1); 6315 for (size_t __i = 0; __i < __b_.size() - 1; ++__i) 6316 __densities_.push_back(__fw((__b_[__i+1] + __b_[__i])*.5)); 6317 __init(); 6318 } 6319} 6320 6321#endif // _LIBCPP_CXX03_LANG 6322 6323template<class _RealType> 6324template<class _UnaryOperation> 6325piecewise_constant_distribution<_RealType>::param_type::param_type( 6326 size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw) 6327 : __b_(__nw == 0 ? 2 : __nw + 1) 6328{ 6329 size_t __n = __b_.size() - 1; 6330 result_type __d = (__xmax - __xmin) / __n; 6331 __densities_.reserve(__n); 6332 for (size_t __i = 0; __i < __n; ++__i) 6333 { 6334 __b_[__i] = __xmin + __i * __d; 6335 __densities_.push_back(__fw(__b_[__i] + __d*.5)); 6336 } 6337 __b_[__n] = __xmax; 6338 __init(); 6339} 6340 6341template<class _RealType> 6342template<class _URNG> 6343_RealType 6344piecewise_constant_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 6345{ 6346 typedef uniform_real_distribution<result_type> _Gen; 6347 result_type __u = _Gen()(__g); 6348 ptrdiff_t __k = _VSTD::upper_bound(__p.__areas_.begin(), __p.__areas_.end(), 6349 __u) - __p.__areas_.begin() - 1; 6350 return (__u - __p.__areas_[__k]) / __p.__densities_[__k] + __p.__b_[__k]; 6351} 6352 6353template <class _CharT, class _Traits, class _RT> 6354basic_ostream<_CharT, _Traits>& 6355operator<<(basic_ostream<_CharT, _Traits>& __os, 6356 const piecewise_constant_distribution<_RT>& __x) 6357{ 6358 __save_flags<_CharT, _Traits> __lx(__os); 6359 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6360 ios_base::scientific); 6361 _CharT __sp = __os.widen(' '); 6362 __os.fill(__sp); 6363 size_t __n = __x.__p_.__b_.size(); 6364 __os << __n; 6365 for (size_t __i = 0; __i < __n; ++__i) 6366 __os << __sp << __x.__p_.__b_[__i]; 6367 __n = __x.__p_.__densities_.size(); 6368 __os << __sp << __n; 6369 for (size_t __i = 0; __i < __n; ++__i) 6370 __os << __sp << __x.__p_.__densities_[__i]; 6371 __n = __x.__p_.__areas_.size(); 6372 __os << __sp << __n; 6373 for (size_t __i = 0; __i < __n; ++__i) 6374 __os << __sp << __x.__p_.__areas_[__i]; 6375 return __os; 6376} 6377 6378template <class _CharT, class _Traits, class _RT> 6379basic_istream<_CharT, _Traits>& 6380operator>>(basic_istream<_CharT, _Traits>& __is, 6381 piecewise_constant_distribution<_RT>& __x) 6382{ 6383 typedef piecewise_constant_distribution<_RT> _Eng; 6384 typedef typename _Eng::result_type result_type; 6385 __save_flags<_CharT, _Traits> __lx(__is); 6386 __is.flags(ios_base::dec | ios_base::skipws); 6387 size_t __n; 6388 __is >> __n; 6389 vector<result_type> __b(__n); 6390 for (size_t __i = 0; __i < __n; ++__i) 6391 __is >> __b[__i]; 6392 __is >> __n; 6393 vector<result_type> __densities(__n); 6394 for (size_t __i = 0; __i < __n; ++__i) 6395 __is >> __densities[__i]; 6396 __is >> __n; 6397 vector<result_type> __areas(__n); 6398 for (size_t __i = 0; __i < __n; ++__i) 6399 __is >> __areas[__i]; 6400 if (!__is.fail()) 6401 { 6402 swap(__x.__p_.__b_, __b); 6403 swap(__x.__p_.__densities_, __densities); 6404 swap(__x.__p_.__areas_, __areas); 6405 } 6406 return __is; 6407} 6408 6409// piecewise_linear_distribution 6410 6411template<class _RealType = double> 6412class _LIBCPP_TEMPLATE_VIS piecewise_linear_distribution 6413{ 6414public: 6415 // types 6416 typedef _RealType result_type; 6417 6418 class _LIBCPP_TEMPLATE_VIS param_type 6419 { 6420 vector<result_type> __b_; 6421 vector<result_type> __densities_; 6422 vector<result_type> __areas_; 6423 public: 6424 typedef piecewise_linear_distribution distribution_type; 6425 6426 param_type(); 6427 template<class _InputIteratorB, class _InputIteratorW> 6428 param_type(_InputIteratorB __fB, _InputIteratorB __lB, 6429 _InputIteratorW __fW); 6430#ifndef _LIBCPP_CXX03_LANG 6431 template<class _UnaryOperation> 6432 param_type(initializer_list<result_type> __bl, _UnaryOperation __fw); 6433#endif // _LIBCPP_CXX03_LANG 6434 template<class _UnaryOperation> 6435 param_type(size_t __nw, result_type __xmin, result_type __xmax, 6436 _UnaryOperation __fw); 6437 param_type(param_type const&) = default; 6438 param_type & operator=(const param_type& __rhs); 6439 6440 _LIBCPP_INLINE_VISIBILITY 6441 vector<result_type> intervals() const {return __b_;} 6442 _LIBCPP_INLINE_VISIBILITY 6443 vector<result_type> densities() const {return __densities_;} 6444 6445 friend _LIBCPP_INLINE_VISIBILITY 6446 bool operator==(const param_type& __x, const param_type& __y) 6447 {return __x.__densities_ == __y.__densities_ && __x.__b_ == __y.__b_;} 6448 friend _LIBCPP_INLINE_VISIBILITY 6449 bool operator!=(const param_type& __x, const param_type& __y) 6450 {return !(__x == __y);} 6451 6452 private: 6453 void __init(); 6454 6455 friend class piecewise_linear_distribution; 6456 6457 template <class _CharT, class _Traits, class _RT> 6458 friend 6459 basic_ostream<_CharT, _Traits>& 6460 operator<<(basic_ostream<_CharT, _Traits>& __os, 6461 const piecewise_linear_distribution<_RT>& __x); 6462 6463 template <class _CharT, class _Traits, class _RT> 6464 friend 6465 basic_istream<_CharT, _Traits>& 6466 operator>>(basic_istream<_CharT, _Traits>& __is, 6467 piecewise_linear_distribution<_RT>& __x); 6468 }; 6469 6470private: 6471 param_type __p_; 6472 6473public: 6474 // constructor and reset functions 6475 _LIBCPP_INLINE_VISIBILITY 6476 piecewise_linear_distribution() {} 6477 template<class _InputIteratorB, class _InputIteratorW> 6478 _LIBCPP_INLINE_VISIBILITY 6479 piecewise_linear_distribution(_InputIteratorB __fB, 6480 _InputIteratorB __lB, 6481 _InputIteratorW __fW) 6482 : __p_(__fB, __lB, __fW) {} 6483 6484#ifndef _LIBCPP_CXX03_LANG 6485 template<class _UnaryOperation> 6486 _LIBCPP_INLINE_VISIBILITY 6487 piecewise_linear_distribution(initializer_list<result_type> __bl, 6488 _UnaryOperation __fw) 6489 : __p_(__bl, __fw) {} 6490#endif // _LIBCPP_CXX03_LANG 6491 6492 template<class _UnaryOperation> 6493 _LIBCPP_INLINE_VISIBILITY 6494 piecewise_linear_distribution(size_t __nw, result_type __xmin, 6495 result_type __xmax, _UnaryOperation __fw) 6496 : __p_(__nw, __xmin, __xmax, __fw) {} 6497 6498 _LIBCPP_INLINE_VISIBILITY 6499 explicit piecewise_linear_distribution(const param_type& __p) 6500 : __p_(__p) {} 6501 6502 _LIBCPP_INLINE_VISIBILITY 6503 void reset() {} 6504 6505 // generating functions 6506 template<class _URNG> 6507 _LIBCPP_INLINE_VISIBILITY 6508 result_type operator()(_URNG& __g) 6509 {return (*this)(__g, __p_);} 6510 template<class _URNG> result_type operator()(_URNG& __g, const param_type& __p); 6511 6512 // property functions 6513 _LIBCPP_INLINE_VISIBILITY 6514 vector<result_type> intervals() const {return __p_.intervals();} 6515 _LIBCPP_INLINE_VISIBILITY 6516 vector<result_type> densities() const {return __p_.densities();} 6517 6518 _LIBCPP_INLINE_VISIBILITY 6519 param_type param() const {return __p_;} 6520 _LIBCPP_INLINE_VISIBILITY 6521 void param(const param_type& __p) {__p_ = __p;} 6522 6523 _LIBCPP_INLINE_VISIBILITY 6524 result_type min() const {return __p_.__b_.front();} 6525 _LIBCPP_INLINE_VISIBILITY 6526 result_type max() const {return __p_.__b_.back();} 6527 6528 friend _LIBCPP_INLINE_VISIBILITY 6529 bool operator==(const piecewise_linear_distribution& __x, 6530 const piecewise_linear_distribution& __y) 6531 {return __x.__p_ == __y.__p_;} 6532 friend _LIBCPP_INLINE_VISIBILITY 6533 bool operator!=(const piecewise_linear_distribution& __x, 6534 const piecewise_linear_distribution& __y) 6535 {return !(__x == __y);} 6536 6537 template <class _CharT, class _Traits, class _RT> 6538 friend 6539 basic_ostream<_CharT, _Traits>& 6540 operator<<(basic_ostream<_CharT, _Traits>& __os, 6541 const piecewise_linear_distribution<_RT>& __x); 6542 6543 template <class _CharT, class _Traits, class _RT> 6544 friend 6545 basic_istream<_CharT, _Traits>& 6546 operator>>(basic_istream<_CharT, _Traits>& __is, 6547 piecewise_linear_distribution<_RT>& __x); 6548}; 6549 6550template<class _RealType> 6551typename piecewise_linear_distribution<_RealType>::param_type & 6552piecewise_linear_distribution<_RealType>::param_type::operator= 6553 (const param_type& __rhs) 6554{ 6555// These can throw 6556 __b_.reserve (__rhs.__b_.size ()); 6557 __densities_.reserve(__rhs.__densities_.size()); 6558 __areas_.reserve (__rhs.__areas_.size()); 6559 6560// These can not throw 6561 __b_ = __rhs.__b_; 6562 __densities_ = __rhs.__densities_; 6563 __areas_ = __rhs.__areas_; 6564 return *this; 6565} 6566 6567 6568template<class _RealType> 6569void 6570piecewise_linear_distribution<_RealType>::param_type::__init() 6571{ 6572 __areas_.assign(__densities_.size() - 1, result_type()); 6573 result_type _Sp = 0; 6574 for (size_t __i = 0; __i < __areas_.size(); ++__i) 6575 { 6576 __areas_[__i] = (__densities_[__i+1] + __densities_[__i]) * 6577 (__b_[__i+1] - __b_[__i]) * .5; 6578 _Sp += __areas_[__i]; 6579 } 6580 for (size_t __i = __areas_.size(); __i > 1;) 6581 { 6582 --__i; 6583 __areas_[__i] = __areas_[__i-1] / _Sp; 6584 } 6585 __areas_[0] = 0; 6586 for (size_t __i = 1; __i < __areas_.size(); ++__i) 6587 __areas_[__i] += __areas_[__i-1]; 6588 for (size_t __i = 0; __i < __densities_.size(); ++__i) 6589 __densities_[__i] /= _Sp; 6590} 6591 6592template<class _RealType> 6593piecewise_linear_distribution<_RealType>::param_type::param_type() 6594 : __b_(2), 6595 __densities_(2, 1.0), 6596 __areas_(1, 0.0) 6597{ 6598 __b_[1] = 1; 6599} 6600 6601template<class _RealType> 6602template<class _InputIteratorB, class _InputIteratorW> 6603piecewise_linear_distribution<_RealType>::param_type::param_type( 6604 _InputIteratorB __fB, _InputIteratorB __lB, _InputIteratorW __fW) 6605 : __b_(__fB, __lB) 6606{ 6607 if (__b_.size() < 2) 6608 { 6609 __b_.resize(2); 6610 __b_[0] = 0; 6611 __b_[1] = 1; 6612 __densities_.assign(2, 1.0); 6613 __areas_.assign(1, 0.0); 6614 } 6615 else 6616 { 6617 __densities_.reserve(__b_.size()); 6618 for (size_t __i = 0; __i < __b_.size(); ++__i, ++__fW) 6619 __densities_.push_back(*__fW); 6620 __init(); 6621 } 6622} 6623 6624#ifndef _LIBCPP_CXX03_LANG 6625 6626template<class _RealType> 6627template<class _UnaryOperation> 6628piecewise_linear_distribution<_RealType>::param_type::param_type( 6629 initializer_list<result_type> __bl, _UnaryOperation __fw) 6630 : __b_(__bl.begin(), __bl.end()) 6631{ 6632 if (__b_.size() < 2) 6633 { 6634 __b_.resize(2); 6635 __b_[0] = 0; 6636 __b_[1] = 1; 6637 __densities_.assign(2, 1.0); 6638 __areas_.assign(1, 0.0); 6639 } 6640 else 6641 { 6642 __densities_.reserve(__b_.size()); 6643 for (size_t __i = 0; __i < __b_.size(); ++__i) 6644 __densities_.push_back(__fw(__b_[__i])); 6645 __init(); 6646 } 6647} 6648 6649#endif // _LIBCPP_CXX03_LANG 6650 6651template<class _RealType> 6652template<class _UnaryOperation> 6653piecewise_linear_distribution<_RealType>::param_type::param_type( 6654 size_t __nw, result_type __xmin, result_type __xmax, _UnaryOperation __fw) 6655 : __b_(__nw == 0 ? 2 : __nw + 1) 6656{ 6657 size_t __n = __b_.size() - 1; 6658 result_type __d = (__xmax - __xmin) / __n; 6659 __densities_.reserve(__b_.size()); 6660 for (size_t __i = 0; __i < __n; ++__i) 6661 { 6662 __b_[__i] = __xmin + __i * __d; 6663 __densities_.push_back(__fw(__b_[__i])); 6664 } 6665 __b_[__n] = __xmax; 6666 __densities_.push_back(__fw(__b_[__n])); 6667 __init(); 6668} 6669 6670template<class _RealType> 6671template<class _URNG> 6672_RealType 6673piecewise_linear_distribution<_RealType>::operator()(_URNG& __g, const param_type& __p) 6674{ 6675 typedef uniform_real_distribution<result_type> _Gen; 6676 result_type __u = _Gen()(__g); 6677 ptrdiff_t __k = _VSTD::upper_bound(__p.__areas_.begin(), __p.__areas_.end(), 6678 __u) - __p.__areas_.begin() - 1; 6679 __u -= __p.__areas_[__k]; 6680 const result_type __dk = __p.__densities_[__k]; 6681 const result_type __dk1 = __p.__densities_[__k+1]; 6682 const result_type __deltad = __dk1 - __dk; 6683 const result_type __bk = __p.__b_[__k]; 6684 if (__deltad == 0) 6685 return __u / __dk + __bk; 6686 const result_type __bk1 = __p.__b_[__k+1]; 6687 const result_type __deltab = __bk1 - __bk; 6688 return (__bk * __dk1 - __bk1 * __dk + 6689 _VSTD::sqrt(__deltab * (__deltab * __dk * __dk + 2 * __deltad * __u))) / 6690 __deltad; 6691} 6692 6693template <class _CharT, class _Traits, class _RT> 6694basic_ostream<_CharT, _Traits>& 6695operator<<(basic_ostream<_CharT, _Traits>& __os, 6696 const piecewise_linear_distribution<_RT>& __x) 6697{ 6698 __save_flags<_CharT, _Traits> __lx(__os); 6699 __os.flags(ios_base::dec | ios_base::left | ios_base::fixed | 6700 ios_base::scientific); 6701 _CharT __sp = __os.widen(' '); 6702 __os.fill(__sp); 6703 size_t __n = __x.__p_.__b_.size(); 6704 __os << __n; 6705 for (size_t __i = 0; __i < __n; ++__i) 6706 __os << __sp << __x.__p_.__b_[__i]; 6707 __n = __x.__p_.__densities_.size(); 6708 __os << __sp << __n; 6709 for (size_t __i = 0; __i < __n; ++__i) 6710 __os << __sp << __x.__p_.__densities_[__i]; 6711 __n = __x.__p_.__areas_.size(); 6712 __os << __sp << __n; 6713 for (size_t __i = 0; __i < __n; ++__i) 6714 __os << __sp << __x.__p_.__areas_[__i]; 6715 return __os; 6716} 6717 6718template <class _CharT, class _Traits, class _RT> 6719basic_istream<_CharT, _Traits>& 6720operator>>(basic_istream<_CharT, _Traits>& __is, 6721 piecewise_linear_distribution<_RT>& __x) 6722{ 6723 typedef piecewise_linear_distribution<_RT> _Eng; 6724 typedef typename _Eng::result_type result_type; 6725 __save_flags<_CharT, _Traits> __lx(__is); 6726 __is.flags(ios_base::dec | ios_base::skipws); 6727 size_t __n; 6728 __is >> __n; 6729 vector<result_type> __b(__n); 6730 for (size_t __i = 0; __i < __n; ++__i) 6731 __is >> __b[__i]; 6732 __is >> __n; 6733 vector<result_type> __densities(__n); 6734 for (size_t __i = 0; __i < __n; ++__i) 6735 __is >> __densities[__i]; 6736 __is >> __n; 6737 vector<result_type> __areas(__n); 6738 for (size_t __i = 0; __i < __n; ++__i) 6739 __is >> __areas[__i]; 6740 if (!__is.fail()) 6741 { 6742 swap(__x.__p_.__b_, __b); 6743 swap(__x.__p_.__densities_, __densities); 6744 swap(__x.__p_.__areas_, __areas); 6745 } 6746 return __is; 6747} 6748 6749_LIBCPP_END_NAMESPACE_STD 6750 6751_LIBCPP_POP_MACROS 6752 6753#endif // _LIBCPP_RANDOM 6754