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The C and C++ Include Header Files
/usr/include/c++/13/limits
$ cat -n /usr/include/c++/13/limits 1 // The template and inlines for the numeric_limits classes. -*- C++ -*- 2 3 // Copyright (C) 1999-2023 Free Software Foundation, Inc. 4 // 5 // This file is part of the GNU ISO C++ Library. This library is free 6 // software; you can redistribute it and/or modify it under the 7 // terms of the GNU General Public License as published by the 8 // Free Software Foundation; either version 3, or (at your option) 9 // any later version. 10 11 // This library is distributed in the hope that it will be useful, 12 // but WITHOUT ANY WARRANTY; without even the implied warranty of 13 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 // GNU General Public License for more details. 15 16 // Under Section 7 of GPL version 3, you are granted additional 17 // permissions described in the GCC Runtime Library Exception, version 18 // 3.1, as published by the Free Software Foundation. 19 20 // You should have received a copy of the GNU General Public License and 21 // a copy of the GCC Runtime Library Exception along with this program; 22 // see the files COPYING3 and COPYING.RUNTIME respectively. If not, see 23 // <http://www.gnu.org/licenses/>. 24 25 /** @file include/limits 26 * This is a Standard C++ Library header. 27 */ 28 29 // Note: this is not a conforming implementation. 30 // Written by Gabriel Dos Reis <gdr@codesourcery.com> 31 32 // 33 // ISO 14882:1998 34 // 18.2.1 35 // 36 37 #ifndef _GLIBCXX_NUMERIC_LIMITS 38 #define _GLIBCXX_NUMERIC_LIMITS 1 39 40 #pragma GCC system_header 41 42 #include <bits/c++config.h> 43 44 // 45 // The numeric_limits<> traits document implementation-defined aspects 46 // of fundamental arithmetic data types (integers and floating points). 47 // From Standard C++ point of view, there are 14 such types: 48 // * integers 49 // bool (1) 50 // char, signed char, unsigned char, wchar_t (4) 51 // short, unsigned short (2) 52 // int, unsigned (2) 53 // long, unsigned long (2) 54 // 55 // * floating points 56 // float (1) 57 // double (1) 58 // long double (1) 59 // 60 // GNU C++ understands (where supported by the host C-library) 61 // * integer 62 // long long, unsigned long long (2) 63 // 64 // which brings us to 16 fundamental arithmetic data types in GNU C++. 65 // 66 // 67 // Since a numeric_limits<> is a bit tricky to get right, we rely on 68 // an interface composed of macros which should be defined in config/os 69 // or config/cpu when they differ from the generic (read arbitrary) 70 // definitions given here. 71 // 72 73 // These values can be overridden in the target configuration file. 74 // The default values are appropriate for many 32-bit targets. 75 76 // GCC only intrinsically supports modulo integral types. The only remaining 77 // integral exceptional values is division by zero. Only targets that do not 78 // signal division by zero in some "hard to ignore" way should use false. 79 #ifndef __glibcxx_integral_traps 80 # define __glibcxx_integral_traps true 81 #endif 82 83 // float 84 // 85 86 // Default values. Should be overridden in configuration files if necessary. 87 88 #ifndef __glibcxx_float_has_denorm_loss 89 # define __glibcxx_float_has_denorm_loss false 90 #endif 91 #ifndef __glibcxx_float_traps 92 # define __glibcxx_float_traps false 93 #endif 94 #ifndef __glibcxx_float_tinyness_before 95 # define __glibcxx_float_tinyness_before false 96 #endif 97 98 // double 99 100 // Default values. Should be overridden in configuration files if necessary. 101 102 #ifndef __glibcxx_double_has_denorm_loss 103 # define __glibcxx_double_has_denorm_loss false 104 #endif 105 #ifndef __glibcxx_double_traps 106 # define __glibcxx_double_traps false 107 #endif 108 #ifndef __glibcxx_double_tinyness_before 109 # define __glibcxx_double_tinyness_before false 110 #endif 111 112 // long double 113 114 // Default values. Should be overridden in configuration files if necessary. 115 116 #ifndef __glibcxx_long_double_has_denorm_loss 117 # define __glibcxx_long_double_has_denorm_loss false 118 #endif 119 #ifndef __glibcxx_long_double_traps 120 # define __glibcxx_long_double_traps false 121 #endif 122 #ifndef __glibcxx_long_double_tinyness_before 123 # define __glibcxx_long_double_tinyness_before false 124 #endif 125 126 // You should not need to define any macros below this point. 127 128 #define __glibcxx_signed_b(T,B) ((T)(-1) < 0) 129 130 #define __glibcxx_min_b(T,B) \ 131 (__glibcxx_signed_b (T,B) ? -__glibcxx_max_b (T,B) - 1 : (T)0) 132 133 #define __glibcxx_max_b(T,B) \ 134 (__glibcxx_signed_b (T,B) ? \ 135 (((((T)1 << (__glibcxx_digits_b (T,B) - 1)) - 1) << 1) + 1) : ~(T)0) 136 137 #define __glibcxx_digits_b(T,B) \ 138 (B - __glibcxx_signed_b (T,B)) 139 140 // The fraction 643/2136 approximates log10(2) to 7 significant digits. 141 #define __glibcxx_digits10_b(T,B) \ 142 (__glibcxx_digits_b (T,B) * 643L / 2136) 143 144 #define __glibcxx_signed(T) \ 145 __glibcxx_signed_b (T, sizeof(T) * __CHAR_BIT__) 146 #define __glibcxx_min(T) \ 147 __glibcxx_min_b (T, sizeof(T) * __CHAR_BIT__) 148 #define __glibcxx_max(T) \ 149 __glibcxx_max_b (T, sizeof(T) * __CHAR_BIT__) 150 #define __glibcxx_digits(T) \ 151 __glibcxx_digits_b (T, sizeof(T) * __CHAR_BIT__) 152 #define __glibcxx_digits10(T) \ 153 __glibcxx_digits10_b (T, sizeof(T) * __CHAR_BIT__) 154 155 #define __glibcxx_max_digits10(T) \ 156 (2 + (T) * 643L / 2136) 157 158 namespace std _GLIBCXX_VISIBILITY(default) 159 { 160 _GLIBCXX_BEGIN_NAMESPACE_VERSION 161 162 /** 163 * @brief Describes the rounding style for floating-point types. 164 * 165 * This is used in the std::numeric_limits class. 166 */ 167 enum float_round_style 168 { 169 round_indeterminate = -1, ///< Intermediate. 170 round_toward_zero = 0, ///< To zero. 171 round_to_nearest = 1, ///< To the nearest representable value. 172 round_toward_infinity = 2, ///< To infinity. 173 round_toward_neg_infinity = 3 ///< To negative infinity. 174 }; 175 176 /** 177 * @brief Describes the denormalization for floating-point types. 178 * 179 * These values represent the presence or absence of a variable number 180 * of exponent bits. This type is used in the std::numeric_limits class. 181 */ 182 enum float_denorm_style 183 { 184 /// Indeterminate at compile time whether denormalized values are allowed. 185 denorm_indeterminate = -1, 186 /// The type does not allow denormalized values. 187 denorm_absent = 0, 188 /// The type allows denormalized values. 189 denorm_present = 1 190 }; 191 192 /** 193 * @brief Part of std::numeric_limits. 194 * 195 * The @c static @c const members are usable as integral constant 196 * expressions. 197 * 198 * @note This is a separate class for purposes of efficiency; you 199 * should only access these members as part of an instantiation 200 * of the std::numeric_limits class. 201 */ 202 struct __numeric_limits_base 203 { 204 /** This will be true for all fundamental types (which have 205 specializations), and false for everything else. */ 206 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = false; 207 208 /** The number of @c radix digits that be represented without change: for 209 integer types, the number of non-sign bits in the mantissa; for 210 floating types, the number of @c radix digits in the mantissa. */ 211 static _GLIBCXX_USE_CONSTEXPR int digits = 0; 212 213 /** The number of base 10 digits that can be represented without change. */ 214 static _GLIBCXX_USE_CONSTEXPR int digits10 = 0; 215 216 #if __cplusplus >= 201103L 217 /** The number of base 10 digits required to ensure that values which 218 differ are always differentiated. */ 219 static constexpr int max_digits10 = 0; 220 #endif 221 222 /** True if the type is signed. */ 223 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 224 225 /** True if the type is integer. */ 226 static _GLIBCXX_USE_CONSTEXPR bool is_integer = false; 227 228 /** True if the type uses an exact representation. All integer types are 229 exact, but not all exact types are integer. For example, rational and 230 fixed-exponent representations are exact but not integer. */ 231 static _GLIBCXX_USE_CONSTEXPR bool is_exact = false; 232 233 /** For integer types, specifies the base of the representation. For 234 floating types, specifies the base of the exponent representation. */ 235 static _GLIBCXX_USE_CONSTEXPR int radix = 0; 236 237 /** The minimum negative integer such that @c radix raised to the power of 238 (one less than that integer) is a normalized floating point number. */ 239 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 240 241 /** The minimum negative integer such that 10 raised to that power is in 242 the range of normalized floating point numbers. */ 243 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 244 245 /** The maximum positive integer such that @c radix raised to the power of 246 (one less than that integer) is a representable finite floating point 247 number. */ 248 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 249 250 /** The maximum positive integer such that 10 raised to that power is in 251 the range of representable finite floating point numbers. */ 252 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 253 254 /** True if the type has a representation for positive infinity. */ 255 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 256 257 /** True if the type has a representation for a quiet (non-signaling) 258 Not a Number. */ 259 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 260 261 /** True if the type has a representation for a signaling 262 Not a Number. */ 263 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 264 265 /** See std::float_denorm_style for more information. */ 266 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm = denorm_absent; 267 268 /** True if loss of accuracy is detected as a denormalization loss, 269 rather than as an inexact result. */ 270 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 271 272 /** True if-and-only-if the type adheres to the IEC 559 standard, also 273 known as IEEE 754. (Only makes sense for floating point types.) */ 274 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 275 276 /** True if the set of values representable by the type is 277 finite. All built-in types are bounded, this member would be 278 false for arbitrary precision types. */ 279 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = false; 280 281 /** True if the type is @e modulo. A type is modulo if, for any 282 operation involving +, -, or * on values of that type whose 283 result would fall outside the range [min(),max()], the value 284 returned differs from the true value by an integer multiple of 285 max() - min() + 1. On most machines, this is false for floating 286 types, true for unsigned integers, and true for signed integers. 287 See PR22200 about signed integers. */ 288 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 289 290 /** True if trapping is implemented for this type. */ 291 static _GLIBCXX_USE_CONSTEXPR bool traps = false; 292 293 /** True if tininess is detected before rounding. (see IEC 559) */ 294 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 295 296 /** See std::float_round_style for more information. This is only 297 meaningful for floating types; integer types will all be 298 round_toward_zero. */ 299 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style = 300 round_toward_zero; 301 }; 302 303 /** 304 * @brief Properties of fundamental types. 305 * 306 * This class allows a program to obtain information about the 307 * representation of a fundamental type on a given platform. For 308 * non-fundamental types, the functions will return 0 and the data 309 * members will all be @c false. 310 */ 311 template<typename _Tp> 312 struct numeric_limits : public __numeric_limits_base 313 { 314 /** The minimum finite value, or for floating types with 315 denormalization, the minimum positive normalized value. */ 316 static _GLIBCXX_CONSTEXPR _Tp 317 min() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 318 319 /** The maximum finite value. */ 320 static _GLIBCXX_CONSTEXPR _Tp 321 max() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 322 323 #if __cplusplus >= 201103L 324 /** A finite value x such that there is no other finite value y 325 * where y < x. */ 326 static constexpr _Tp 327 lowest() noexcept { return _Tp(); } 328 #endif 329 330 /** The @e machine @e epsilon: the difference between 1 and the least 331 value greater than 1 that is representable. */ 332 static _GLIBCXX_CONSTEXPR _Tp 333 epsilon() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 334 335 /** The maximum rounding error measurement (see LIA-1). */ 336 static _GLIBCXX_CONSTEXPR _Tp 337 round_error() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 338 339 /** The representation of positive infinity, if @c has_infinity. */ 340 static _GLIBCXX_CONSTEXPR _Tp 341 infinity() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 342 343 /** The representation of a quiet Not a Number, 344 if @c has_quiet_NaN. */ 345 static _GLIBCXX_CONSTEXPR _Tp 346 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 347 348 /** The representation of a signaling Not a Number, if 349 @c has_signaling_NaN. */ 350 static _GLIBCXX_CONSTEXPR _Tp 351 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 352 353 /** The minimum positive denormalized value. For types where 354 @c has_denorm is false, this is the minimum positive normalized 355 value. */ 356 static _GLIBCXX_CONSTEXPR _Tp 357 denorm_min() _GLIBCXX_USE_NOEXCEPT { return _Tp(); } 358 }; 359 360 // _GLIBCXX_RESOLVE_LIB_DEFECTS 361 // 559. numeric_limits<const T> 362 363 template<typename _Tp> 364 struct numeric_limits<const _Tp> 365 : public numeric_limits<_Tp> { }; 366 367 template<typename _Tp> 368 struct numeric_limits<volatile _Tp> 369 : public numeric_limits<_Tp> { }; 370 371 template<typename _Tp> 372 struct numeric_limits<const volatile _Tp> 373 : public numeric_limits<_Tp> { }; 374 375 // Now there follow 16 explicit specializations. Yes, 16. Make sure 376 // you get the count right. (18 in C++11 mode, with char16_t and char32_t.) 377 // (+1 if char8_t is enabled.) 378 379 // _GLIBCXX_RESOLVE_LIB_DEFECTS 380 // 184. numeric_limits<bool> wording problems 381 382 /// numeric_limits<bool> specialization. 383 template<> 384 struct numeric_limits<bool> 385 { 386 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 387 388 static _GLIBCXX_CONSTEXPR bool 389 min() _GLIBCXX_USE_NOEXCEPT { return false; } 390 391 static _GLIBCXX_CONSTEXPR bool 392 max() _GLIBCXX_USE_NOEXCEPT { return true; } 393 394 #if __cplusplus >= 201103L 395 static constexpr bool 396 lowest() noexcept { return min(); } 397 #endif 398 static _GLIBCXX_USE_CONSTEXPR int digits = 1; 399 static _GLIBCXX_USE_CONSTEXPR int digits10 = 0; 400 #if __cplusplus >= 201103L 401 static constexpr int max_digits10 = 0; 402 #endif 403 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 404 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 405 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 406 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 407 408 static _GLIBCXX_CONSTEXPR bool 409 epsilon() _GLIBCXX_USE_NOEXCEPT { return false; } 410 411 static _GLIBCXX_CONSTEXPR bool 412 round_error() _GLIBCXX_USE_NOEXCEPT { return false; } 413 414 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 415 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 416 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 417 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 418 419 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 420 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 421 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 422 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 423 = denorm_absent; 424 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 425 426 static _GLIBCXX_CONSTEXPR bool 427 infinity() _GLIBCXX_USE_NOEXCEPT { return false; } 428 429 static _GLIBCXX_CONSTEXPR bool 430 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return false; } 431 432 static _GLIBCXX_CONSTEXPR bool 433 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return false; } 434 435 static _GLIBCXX_CONSTEXPR bool 436 denorm_min() _GLIBCXX_USE_NOEXCEPT { return false; } 437 438 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 439 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 440 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 441 442 // It is not clear what it means for a boolean type to trap. 443 // This is a DR on the LWG issue list. Here, I use integer 444 // promotion semantics. 445 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 446 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 447 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 448 = round_toward_zero; 449 }; 450 451 /// numeric_limits<char> specialization. 452 template<> 453 struct numeric_limits<char> 454 { 455 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 456 457 static _GLIBCXX_CONSTEXPR char 458 min() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_min(char); } 459 460 static _GLIBCXX_CONSTEXPR char 461 max() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_max(char); } 462 463 #if __cplusplus >= 201103L 464 static constexpr char 465 lowest() noexcept { return min(); } 466 #endif 467 468 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (char); 469 static _GLIBCXX_USE_CONSTEXPR int digits10 = __glibcxx_digits10 (char); 470 #if __cplusplus >= 201103L 471 static constexpr int max_digits10 = 0; 472 #endif 473 static _GLIBCXX_USE_CONSTEXPR bool is_signed = __glibcxx_signed (char); 474 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 475 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 476 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 477 478 static _GLIBCXX_CONSTEXPR char 479 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 480 481 static _GLIBCXX_CONSTEXPR char 482 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 483 484 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 485 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 486 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 487 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 488 489 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 490 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 491 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 492 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 493 = denorm_absent; 494 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 495 496 static _GLIBCXX_CONSTEXPR 497 char infinity() _GLIBCXX_USE_NOEXCEPT { return char(); } 498 499 static _GLIBCXX_CONSTEXPR char 500 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return char(); } 501 502 static _GLIBCXX_CONSTEXPR char 503 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return char(); } 504 505 static _GLIBCXX_CONSTEXPR char 506 denorm_min() _GLIBCXX_USE_NOEXCEPT { return static_cast<char>(0); } 507 508 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 509 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 510 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = !is_signed; 511 512 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 513 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 514 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 515 = round_toward_zero; 516 }; 517 518 /// numeric_limits<signed char> specialization. 519 template<> 520 struct numeric_limits<signed char> 521 { 522 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 523 524 static _GLIBCXX_CONSTEXPR signed char 525 min() _GLIBCXX_USE_NOEXCEPT { return -__SCHAR_MAX__ - 1; } 526 527 static _GLIBCXX_CONSTEXPR signed char 528 max() _GLIBCXX_USE_NOEXCEPT { return __SCHAR_MAX__; } 529 530 #if __cplusplus >= 201103L 531 static constexpr signed char 532 lowest() noexcept { return min(); } 533 #endif 534 535 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (signed char); 536 static _GLIBCXX_USE_CONSTEXPR int digits10 537 = __glibcxx_digits10 (signed char); 538 #if __cplusplus >= 201103L 539 static constexpr int max_digits10 = 0; 540 #endif 541 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 542 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 543 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 544 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 545 546 static _GLIBCXX_CONSTEXPR signed char 547 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 548 549 static _GLIBCXX_CONSTEXPR signed char 550 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 551 552 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 553 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 554 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 555 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 556 557 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 558 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 559 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 560 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 561 = denorm_absent; 562 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 563 564 static _GLIBCXX_CONSTEXPR signed char 565 infinity() _GLIBCXX_USE_NOEXCEPT { return static_cast<signed char>(0); } 566 567 static _GLIBCXX_CONSTEXPR signed char 568 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<signed char>(0); } 569 570 static _GLIBCXX_CONSTEXPR signed char 571 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 572 { return static_cast<signed char>(0); } 573 574 static _GLIBCXX_CONSTEXPR signed char 575 denorm_min() _GLIBCXX_USE_NOEXCEPT 576 { return static_cast<signed char>(0); } 577 578 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 579 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 580 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 581 582 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 583 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 584 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 585 = round_toward_zero; 586 }; 587 588 /// numeric_limits<unsigned char> specialization. 589 template<> 590 struct numeric_limits<unsigned char> 591 { 592 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 593 594 static _GLIBCXX_CONSTEXPR unsigned char 595 min() _GLIBCXX_USE_NOEXCEPT { return 0; } 596 597 static _GLIBCXX_CONSTEXPR unsigned char 598 max() _GLIBCXX_USE_NOEXCEPT { return __SCHAR_MAX__ * 2U + 1; } 599 600 #if __cplusplus >= 201103L 601 static constexpr unsigned char 602 lowest() noexcept { return min(); } 603 #endif 604 605 static _GLIBCXX_USE_CONSTEXPR int digits 606 = __glibcxx_digits (unsigned char); 607 static _GLIBCXX_USE_CONSTEXPR int digits10 608 = __glibcxx_digits10 (unsigned char); 609 #if __cplusplus >= 201103L 610 static constexpr int max_digits10 = 0; 611 #endif 612 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 613 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 614 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 615 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 616 617 static _GLIBCXX_CONSTEXPR unsigned char 618 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 619 620 static _GLIBCXX_CONSTEXPR unsigned char 621 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 622 623 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 624 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 625 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 626 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 627 628 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 629 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 630 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 631 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 632 = denorm_absent; 633 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 634 635 static _GLIBCXX_CONSTEXPR unsigned char 636 infinity() _GLIBCXX_USE_NOEXCEPT 637 { return static_cast<unsigned char>(0); } 638 639 static _GLIBCXX_CONSTEXPR unsigned char 640 quiet_NaN() _GLIBCXX_USE_NOEXCEPT 641 { return static_cast<unsigned char>(0); } 642 643 static _GLIBCXX_CONSTEXPR unsigned char 644 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 645 { return static_cast<unsigned char>(0); } 646 647 static _GLIBCXX_CONSTEXPR unsigned char 648 denorm_min() _GLIBCXX_USE_NOEXCEPT 649 { return static_cast<unsigned char>(0); } 650 651 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 652 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 653 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; 654 655 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 656 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 657 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 658 = round_toward_zero; 659 }; 660 661 /// numeric_limits<wchar_t> specialization. 662 template<> 663 struct numeric_limits<wchar_t> 664 { 665 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 666 667 static _GLIBCXX_CONSTEXPR wchar_t 668 min() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_min (wchar_t); } 669 670 static _GLIBCXX_CONSTEXPR wchar_t 671 max() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_max (wchar_t); } 672 673 #if __cplusplus >= 201103L 674 static constexpr wchar_t 675 lowest() noexcept { return min(); } 676 #endif 677 678 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (wchar_t); 679 static _GLIBCXX_USE_CONSTEXPR int digits10 680 = __glibcxx_digits10 (wchar_t); 681 #if __cplusplus >= 201103L 682 static constexpr int max_digits10 = 0; 683 #endif 684 static _GLIBCXX_USE_CONSTEXPR bool is_signed = __glibcxx_signed (wchar_t); 685 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 686 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 687 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 688 689 static _GLIBCXX_CONSTEXPR wchar_t 690 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 691 692 static _GLIBCXX_CONSTEXPR wchar_t 693 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 694 695 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 696 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 697 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 698 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 699 700 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 701 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 702 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 703 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 704 = denorm_absent; 705 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 706 707 static _GLIBCXX_CONSTEXPR wchar_t 708 infinity() _GLIBCXX_USE_NOEXCEPT { return wchar_t(); } 709 710 static _GLIBCXX_CONSTEXPR wchar_t 711 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return wchar_t(); } 712 713 static _GLIBCXX_CONSTEXPR wchar_t 714 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return wchar_t(); } 715 716 static _GLIBCXX_CONSTEXPR wchar_t 717 denorm_min() _GLIBCXX_USE_NOEXCEPT { return wchar_t(); } 718 719 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 720 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 721 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = !is_signed; 722 723 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 724 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 725 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 726 = round_toward_zero; 727 }; 728 729 #if _GLIBCXX_USE_CHAR8_T 730 /// numeric_limits<char8_t> specialization. 731 template<> 732 struct numeric_limits<char8_t> 733 { 734 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 735 736 static _GLIBCXX_CONSTEXPR char8_t 737 min() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_min (char8_t); } 738 739 static _GLIBCXX_CONSTEXPR char8_t 740 max() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_max (char8_t); } 741 742 static _GLIBCXX_CONSTEXPR char8_t 743 lowest() _GLIBCXX_USE_NOEXCEPT { return min(); } 744 745 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (char8_t); 746 static _GLIBCXX_USE_CONSTEXPR int digits10 = __glibcxx_digits10 (char8_t); 747 static _GLIBCXX_USE_CONSTEXPR int max_digits10 = 0; 748 static _GLIBCXX_USE_CONSTEXPR bool is_signed = __glibcxx_signed (char8_t); 749 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 750 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 751 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 752 753 static _GLIBCXX_CONSTEXPR char8_t 754 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 755 756 static _GLIBCXX_CONSTEXPR char8_t 757 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 758 759 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 760 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 761 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 762 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 763 764 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 765 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 766 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 767 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 768 = denorm_absent; 769 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 770 771 static _GLIBCXX_CONSTEXPR char8_t 772 infinity() _GLIBCXX_USE_NOEXCEPT { return char8_t(); } 773 774 static _GLIBCXX_CONSTEXPR char8_t 775 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return char8_t(); } 776 777 static _GLIBCXX_CONSTEXPR char8_t 778 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return char8_t(); } 779 780 static _GLIBCXX_CONSTEXPR char8_t 781 denorm_min() _GLIBCXX_USE_NOEXCEPT { return char8_t(); } 782 783 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 784 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 785 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = !is_signed; 786 787 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 788 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 789 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 790 = round_toward_zero; 791 }; 792 #endif 793 794 #if __cplusplus >= 201103L 795 /// numeric_limits<char16_t> specialization. 796 template<> 797 struct numeric_limits<char16_t> 798 { 799 static constexpr bool is_specialized = true; 800 801 static constexpr char16_t 802 min() noexcept { return __glibcxx_min (char16_t); } 803 804 static constexpr char16_t 805 max() noexcept { return __glibcxx_max (char16_t); } 806 807 static constexpr char16_t 808 lowest() noexcept { return min(); } 809 810 static constexpr int digits = __glibcxx_digits (char16_t); 811 static constexpr int digits10 = __glibcxx_digits10 (char16_t); 812 static constexpr int max_digits10 = 0; 813 static constexpr bool is_signed = __glibcxx_signed (char16_t); 814 static constexpr bool is_integer = true; 815 static constexpr bool is_exact = true; 816 static constexpr int radix = 2; 817 818 static constexpr char16_t 819 epsilon() noexcept { return 0; } 820 821 static constexpr char16_t 822 round_error() noexcept { return 0; } 823 824 static constexpr int min_exponent = 0; 825 static constexpr int min_exponent10 = 0; 826 static constexpr int max_exponent = 0; 827 static constexpr int max_exponent10 = 0; 828 829 static constexpr bool has_infinity = false; 830 static constexpr bool has_quiet_NaN = false; 831 static constexpr bool has_signaling_NaN = false; 832 static constexpr float_denorm_style has_denorm = denorm_absent; 833 static constexpr bool has_denorm_loss = false; 834 835 static constexpr char16_t 836 infinity() noexcept { return char16_t(); } 837 838 static constexpr char16_t 839 quiet_NaN() noexcept { return char16_t(); } 840 841 static constexpr char16_t 842 signaling_NaN() noexcept { return char16_t(); } 843 844 static constexpr char16_t 845 denorm_min() noexcept { return char16_t(); } 846 847 static constexpr bool is_iec559 = false; 848 static constexpr bool is_bounded = true; 849 static constexpr bool is_modulo = !is_signed; 850 851 static constexpr bool traps = __glibcxx_integral_traps; 852 static constexpr bool tinyness_before = false; 853 static constexpr float_round_style round_style = round_toward_zero; 854 }; 855 856 /// numeric_limits<char32_t> specialization. 857 template<> 858 struct numeric_limits<char32_t> 859 { 860 static constexpr bool is_specialized = true; 861 862 static constexpr char32_t 863 min() noexcept { return __glibcxx_min (char32_t); } 864 865 static constexpr char32_t 866 max() noexcept { return __glibcxx_max (char32_t); } 867 868 static constexpr char32_t 869 lowest() noexcept { return min(); } 870 871 static constexpr int digits = __glibcxx_digits (char32_t); 872 static constexpr int digits10 = __glibcxx_digits10 (char32_t); 873 static constexpr int max_digits10 = 0; 874 static constexpr bool is_signed = __glibcxx_signed (char32_t); 875 static constexpr bool is_integer = true; 876 static constexpr bool is_exact = true; 877 static constexpr int radix = 2; 878 879 static constexpr char32_t 880 epsilon() noexcept { return 0; } 881 882 static constexpr char32_t 883 round_error() noexcept { return 0; } 884 885 static constexpr int min_exponent = 0; 886 static constexpr int min_exponent10 = 0; 887 static constexpr int max_exponent = 0; 888 static constexpr int max_exponent10 = 0; 889 890 static constexpr bool has_infinity = false; 891 static constexpr bool has_quiet_NaN = false; 892 static constexpr bool has_signaling_NaN = false; 893 static constexpr float_denorm_style has_denorm = denorm_absent; 894 static constexpr bool has_denorm_loss = false; 895 896 static constexpr char32_t 897 infinity() noexcept { return char32_t(); } 898 899 static constexpr char32_t 900 quiet_NaN() noexcept { return char32_t(); } 901 902 static constexpr char32_t 903 signaling_NaN() noexcept { return char32_t(); } 904 905 static constexpr char32_t 906 denorm_min() noexcept { return char32_t(); } 907 908 static constexpr bool is_iec559 = false; 909 static constexpr bool is_bounded = true; 910 static constexpr bool is_modulo = !is_signed; 911 912 static constexpr bool traps = __glibcxx_integral_traps; 913 static constexpr bool tinyness_before = false; 914 static constexpr float_round_style round_style = round_toward_zero; 915 }; 916 #endif 917 918 /// numeric_limits<short> specialization. 919 template<> 920 struct numeric_limits<short> 921 { 922 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 923 924 static _GLIBCXX_CONSTEXPR short 925 min() _GLIBCXX_USE_NOEXCEPT { return -__SHRT_MAX__ - 1; } 926 927 static _GLIBCXX_CONSTEXPR short 928 max() _GLIBCXX_USE_NOEXCEPT { return __SHRT_MAX__; } 929 930 #if __cplusplus >= 201103L 931 static constexpr short 932 lowest() noexcept { return min(); } 933 #endif 934 935 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (short); 936 static _GLIBCXX_USE_CONSTEXPR int digits10 = __glibcxx_digits10 (short); 937 #if __cplusplus >= 201103L 938 static constexpr int max_digits10 = 0; 939 #endif 940 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 941 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 942 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 943 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 944 945 static _GLIBCXX_CONSTEXPR short 946 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 947 948 static _GLIBCXX_CONSTEXPR short 949 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 950 951 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 952 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 953 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 954 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 955 956 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 957 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 958 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 959 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 960 = denorm_absent; 961 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 962 963 static _GLIBCXX_CONSTEXPR short 964 infinity() _GLIBCXX_USE_NOEXCEPT { return short(); } 965 966 static _GLIBCXX_CONSTEXPR short 967 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return short(); } 968 969 static _GLIBCXX_CONSTEXPR short 970 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return short(); } 971 972 static _GLIBCXX_CONSTEXPR short 973 denorm_min() _GLIBCXX_USE_NOEXCEPT { return short(); } 974 975 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 976 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 977 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 978 979 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 980 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 981 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 982 = round_toward_zero; 983 }; 984 985 /// numeric_limits<unsigned short> specialization. 986 template<> 987 struct numeric_limits<unsigned short> 988 { 989 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 990 991 static _GLIBCXX_CONSTEXPR unsigned short 992 min() _GLIBCXX_USE_NOEXCEPT { return 0; } 993 994 static _GLIBCXX_CONSTEXPR unsigned short 995 max() _GLIBCXX_USE_NOEXCEPT { return __SHRT_MAX__ * 2U + 1; } 996 997 #if __cplusplus >= 201103L 998 static constexpr unsigned short 999 lowest() noexcept { return min(); } 1000 #endif 1001 1002 static _GLIBCXX_USE_CONSTEXPR int digits 1003 = __glibcxx_digits (unsigned short); 1004 static _GLIBCXX_USE_CONSTEXPR int digits10 1005 = __glibcxx_digits10 (unsigned short); 1006 #if __cplusplus >= 201103L 1007 static constexpr int max_digits10 = 0; 1008 #endif 1009 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 1010 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1011 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1012 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1013 1014 static _GLIBCXX_CONSTEXPR unsigned short 1015 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1016 1017 static _GLIBCXX_CONSTEXPR unsigned short 1018 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1019 1020 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1021 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1022 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1023 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1024 1025 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1026 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1027 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1028 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1029 = denorm_absent; 1030 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1031 1032 static _GLIBCXX_CONSTEXPR unsigned short 1033 infinity() _GLIBCXX_USE_NOEXCEPT 1034 { return static_cast<unsigned short>(0); } 1035 1036 static _GLIBCXX_CONSTEXPR unsigned short 1037 quiet_NaN() _GLIBCXX_USE_NOEXCEPT 1038 { return static_cast<unsigned short>(0); } 1039 1040 static _GLIBCXX_CONSTEXPR unsigned short 1041 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 1042 { return static_cast<unsigned short>(0); } 1043 1044 static _GLIBCXX_CONSTEXPR unsigned short 1045 denorm_min() _GLIBCXX_USE_NOEXCEPT 1046 { return static_cast<unsigned short>(0); } 1047 1048 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1049 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1050 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; 1051 1052 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1053 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1054 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1055 = round_toward_zero; 1056 }; 1057 1058 /// numeric_limits<int> specialization. 1059 template<> 1060 struct numeric_limits<int> 1061 { 1062 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1063 1064 static _GLIBCXX_CONSTEXPR int 1065 min() _GLIBCXX_USE_NOEXCEPT { return -__INT_MAX__ - 1; } 1066 1067 static _GLIBCXX_CONSTEXPR int 1068 max() _GLIBCXX_USE_NOEXCEPT { return __INT_MAX__; } 1069 1070 #if __cplusplus >= 201103L 1071 static constexpr int 1072 lowest() noexcept { return min(); } 1073 #endif 1074 1075 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (int); 1076 static _GLIBCXX_USE_CONSTEXPR int digits10 = __glibcxx_digits10 (int); 1077 #if __cplusplus >= 201103L 1078 static constexpr int max_digits10 = 0; 1079 #endif 1080 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1081 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1082 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1083 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1084 1085 static _GLIBCXX_CONSTEXPR int 1086 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1087 1088 static _GLIBCXX_CONSTEXPR int 1089 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1090 1091 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1092 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1093 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1094 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1095 1096 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1097 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1098 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1099 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1100 = denorm_absent; 1101 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1102 1103 static _GLIBCXX_CONSTEXPR int 1104 infinity() _GLIBCXX_USE_NOEXCEPT { return static_cast<int>(0); } 1105 1106 static _GLIBCXX_CONSTEXPR int 1107 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<int>(0); } 1108 1109 static _GLIBCXX_CONSTEXPR int 1110 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<int>(0); } 1111 1112 static _GLIBCXX_CONSTEXPR int 1113 denorm_min() _GLIBCXX_USE_NOEXCEPT { return static_cast<int>(0); } 1114 1115 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1116 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1117 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1118 1119 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1120 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1121 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1122 = round_toward_zero; 1123 }; 1124 1125 /// numeric_limits<unsigned int> specialization. 1126 template<> 1127 struct numeric_limits<unsigned int> 1128 { 1129 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1130 1131 static _GLIBCXX_CONSTEXPR unsigned int 1132 min() _GLIBCXX_USE_NOEXCEPT { return 0; } 1133 1134 static _GLIBCXX_CONSTEXPR unsigned int 1135 max() _GLIBCXX_USE_NOEXCEPT { return __INT_MAX__ * 2U + 1; } 1136 1137 #if __cplusplus >= 201103L 1138 static constexpr unsigned int 1139 lowest() noexcept { return min(); } 1140 #endif 1141 1142 static _GLIBCXX_USE_CONSTEXPR int digits 1143 = __glibcxx_digits (unsigned int); 1144 static _GLIBCXX_USE_CONSTEXPR int digits10 1145 = __glibcxx_digits10 (unsigned int); 1146 #if __cplusplus >= 201103L 1147 static constexpr int max_digits10 = 0; 1148 #endif 1149 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 1150 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1151 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1152 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1153 1154 static _GLIBCXX_CONSTEXPR unsigned int 1155 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1156 1157 static _GLIBCXX_CONSTEXPR unsigned int 1158 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1159 1160 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1161 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1162 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1163 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1164 1165 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1166 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1167 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1168 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1169 = denorm_absent; 1170 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1171 1172 static _GLIBCXX_CONSTEXPR unsigned int 1173 infinity() _GLIBCXX_USE_NOEXCEPT { return static_cast<unsigned int>(0); } 1174 1175 static _GLIBCXX_CONSTEXPR unsigned int 1176 quiet_NaN() _GLIBCXX_USE_NOEXCEPT 1177 { return static_cast<unsigned int>(0); } 1178 1179 static _GLIBCXX_CONSTEXPR unsigned int 1180 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 1181 { return static_cast<unsigned int>(0); } 1182 1183 static _GLIBCXX_CONSTEXPR unsigned int 1184 denorm_min() _GLIBCXX_USE_NOEXCEPT 1185 { return static_cast<unsigned int>(0); } 1186 1187 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1188 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1189 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; 1190 1191 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1192 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1193 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1194 = round_toward_zero; 1195 }; 1196 1197 /// numeric_limits<long> specialization. 1198 template<> 1199 struct numeric_limits<long> 1200 { 1201 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1202 1203 static _GLIBCXX_CONSTEXPR long 1204 min() _GLIBCXX_USE_NOEXCEPT { return -__LONG_MAX__ - 1; } 1205 1206 static _GLIBCXX_CONSTEXPR long 1207 max() _GLIBCXX_USE_NOEXCEPT { return __LONG_MAX__; } 1208 1209 #if __cplusplus >= 201103L 1210 static constexpr long 1211 lowest() noexcept { return min(); } 1212 #endif 1213 1214 static _GLIBCXX_USE_CONSTEXPR int digits = __glibcxx_digits (long); 1215 static _GLIBCXX_USE_CONSTEXPR int digits10 = __glibcxx_digits10 (long); 1216 #if __cplusplus >= 201103L 1217 static constexpr int max_digits10 = 0; 1218 #endif 1219 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1220 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1221 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1222 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1223 1224 static _GLIBCXX_CONSTEXPR long 1225 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1226 1227 static _GLIBCXX_CONSTEXPR long 1228 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1229 1230 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1231 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1232 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1233 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1234 1235 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1236 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1237 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1238 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1239 = denorm_absent; 1240 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1241 1242 static _GLIBCXX_CONSTEXPR long 1243 infinity() _GLIBCXX_USE_NOEXCEPT { return static_cast<long>(0); } 1244 1245 static _GLIBCXX_CONSTEXPR long 1246 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<long>(0); } 1247 1248 static _GLIBCXX_CONSTEXPR long 1249 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<long>(0); } 1250 1251 static _GLIBCXX_CONSTEXPR long 1252 denorm_min() _GLIBCXX_USE_NOEXCEPT { return static_cast<long>(0); } 1253 1254 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1255 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1256 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1257 1258 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1259 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1260 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1261 = round_toward_zero; 1262 }; 1263 1264 /// numeric_limits<unsigned long> specialization. 1265 template<> 1266 struct numeric_limits<unsigned long> 1267 { 1268 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1269 1270 static _GLIBCXX_CONSTEXPR unsigned long 1271 min() _GLIBCXX_USE_NOEXCEPT { return 0; } 1272 1273 static _GLIBCXX_CONSTEXPR unsigned long 1274 max() _GLIBCXX_USE_NOEXCEPT { return __LONG_MAX__ * 2UL + 1; } 1275 1276 #if __cplusplus >= 201103L 1277 static constexpr unsigned long 1278 lowest() noexcept { return min(); } 1279 #endif 1280 1281 static _GLIBCXX_USE_CONSTEXPR int digits 1282 = __glibcxx_digits (unsigned long); 1283 static _GLIBCXX_USE_CONSTEXPR int digits10 1284 = __glibcxx_digits10 (unsigned long); 1285 #if __cplusplus >= 201103L 1286 static constexpr int max_digits10 = 0; 1287 #endif 1288 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 1289 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1290 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1291 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1292 1293 static _GLIBCXX_CONSTEXPR unsigned long 1294 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1295 1296 static _GLIBCXX_CONSTEXPR unsigned long 1297 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1298 1299 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1300 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1301 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1302 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1303 1304 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1305 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1306 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1307 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1308 = denorm_absent; 1309 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1310 1311 static _GLIBCXX_CONSTEXPR unsigned long 1312 infinity() _GLIBCXX_USE_NOEXCEPT 1313 { return static_cast<unsigned long>(0); } 1314 1315 static _GLIBCXX_CONSTEXPR unsigned long 1316 quiet_NaN() _GLIBCXX_USE_NOEXCEPT 1317 { return static_cast<unsigned long>(0); } 1318 1319 static _GLIBCXX_CONSTEXPR unsigned long 1320 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 1321 { return static_cast<unsigned long>(0); } 1322 1323 static _GLIBCXX_CONSTEXPR unsigned long 1324 denorm_min() _GLIBCXX_USE_NOEXCEPT 1325 { return static_cast<unsigned long>(0); } 1326 1327 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1328 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1329 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; 1330 1331 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1332 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1333 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1334 = round_toward_zero; 1335 }; 1336 1337 /// numeric_limits<long long> specialization. 1338 template<> 1339 struct numeric_limits<long long> 1340 { 1341 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1342 1343 static _GLIBCXX_CONSTEXPR long long 1344 min() _GLIBCXX_USE_NOEXCEPT { return -__LONG_LONG_MAX__ - 1; } 1345 1346 static _GLIBCXX_CONSTEXPR long long 1347 max() _GLIBCXX_USE_NOEXCEPT { return __LONG_LONG_MAX__; } 1348 1349 #if __cplusplus >= 201103L 1350 static constexpr long long 1351 lowest() noexcept { return min(); } 1352 #endif 1353 1354 static _GLIBCXX_USE_CONSTEXPR int digits 1355 = __glibcxx_digits (long long); 1356 static _GLIBCXX_USE_CONSTEXPR int digits10 1357 = __glibcxx_digits10 (long long); 1358 #if __cplusplus >= 201103L 1359 static constexpr int max_digits10 = 0; 1360 #endif 1361 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1362 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1363 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1364 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1365 1366 static _GLIBCXX_CONSTEXPR long long 1367 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1368 1369 static _GLIBCXX_CONSTEXPR long long 1370 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1371 1372 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1373 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1374 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1375 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1376 1377 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1378 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1379 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1380 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1381 = denorm_absent; 1382 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1383 1384 static _GLIBCXX_CONSTEXPR long long 1385 infinity() _GLIBCXX_USE_NOEXCEPT { return static_cast<long long>(0); } 1386 1387 static _GLIBCXX_CONSTEXPR long long 1388 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return static_cast<long long>(0); } 1389 1390 static _GLIBCXX_CONSTEXPR long long 1391 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 1392 { return static_cast<long long>(0); } 1393 1394 static _GLIBCXX_CONSTEXPR long long 1395 denorm_min() _GLIBCXX_USE_NOEXCEPT { return static_cast<long long>(0); } 1396 1397 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1398 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1399 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1400 1401 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1402 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1403 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1404 = round_toward_zero; 1405 }; 1406 1407 /// numeric_limits<unsigned long long> specialization. 1408 template<> 1409 struct numeric_limits<unsigned long long> 1410 { 1411 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1412 1413 static _GLIBCXX_CONSTEXPR unsigned long long 1414 min() _GLIBCXX_USE_NOEXCEPT { return 0; } 1415 1416 static _GLIBCXX_CONSTEXPR unsigned long long 1417 max() _GLIBCXX_USE_NOEXCEPT { return __LONG_LONG_MAX__ * 2ULL + 1; } 1418 1419 #if __cplusplus >= 201103L 1420 static constexpr unsigned long long 1421 lowest() noexcept { return min(); } 1422 #endif 1423 1424 static _GLIBCXX_USE_CONSTEXPR int digits 1425 = __glibcxx_digits (unsigned long long); 1426 static _GLIBCXX_USE_CONSTEXPR int digits10 1427 = __glibcxx_digits10 (unsigned long long); 1428 #if __cplusplus >= 201103L 1429 static constexpr int max_digits10 = 0; 1430 #endif 1431 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; 1432 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; 1433 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; 1434 static _GLIBCXX_USE_CONSTEXPR int radix = 2; 1435 1436 static _GLIBCXX_CONSTEXPR unsigned long long 1437 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } 1438 1439 static _GLIBCXX_CONSTEXPR unsigned long long 1440 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } 1441 1442 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; 1443 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; 1444 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; 1445 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; 1446 1447 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; 1448 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; 1449 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; 1450 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1451 = denorm_absent; 1452 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; 1453 1454 static _GLIBCXX_CONSTEXPR unsigned long long 1455 infinity() _GLIBCXX_USE_NOEXCEPT 1456 { return static_cast<unsigned long long>(0); } 1457 1458 static _GLIBCXX_CONSTEXPR unsigned long long 1459 quiet_NaN() _GLIBCXX_USE_NOEXCEPT 1460 { return static_cast<unsigned long long>(0); } 1461 1462 static _GLIBCXX_CONSTEXPR unsigned long long 1463 signaling_NaN() _GLIBCXX_USE_NOEXCEPT 1464 { return static_cast<unsigned long long>(0); } 1465 1466 static _GLIBCXX_CONSTEXPR unsigned long long 1467 denorm_min() _GLIBCXX_USE_NOEXCEPT 1468 { return static_cast<unsigned long long>(0); } 1469 1470 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; 1471 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1472 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; 1473 1474 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; 1475 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; 1476 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1477 = round_toward_zero; 1478 }; 1479 1480 #define __INT_N(TYPE, BITSIZE, EXT, UEXT) \ 1481 __extension__ \ 1482 template<> \ 1483 struct numeric_limits<TYPE> \ 1484 { \ 1485 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; \ 1486 \ 1487 static _GLIBCXX_CONSTEXPR TYPE \ 1488 min() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_min_b (TYPE, BITSIZE); } \ 1489 \ 1490 static _GLIBCXX_CONSTEXPR TYPE \ 1491 max() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_max_b (TYPE, BITSIZE); } \ 1492 \ 1493 static _GLIBCXX_USE_CONSTEXPR int digits \ 1494 = BITSIZE - 1; \ 1495 static _GLIBCXX_USE_CONSTEXPR int digits10 \ 1496 = (BITSIZE - 1) * 643L / 2136; \ 1497 \ 1498 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; \ 1499 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; \ 1500 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; \ 1501 static _GLIBCXX_USE_CONSTEXPR int radix = 2; \ 1502 \ 1503 static _GLIBCXX_CONSTEXPR TYPE \ 1504 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } \ 1505 \ 1506 static _GLIBCXX_CONSTEXPR TYPE \ 1507 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } \ 1508 \ 1509 EXT \ 1510 \ 1511 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; \ 1512 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; \ 1513 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; \ 1514 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; \ 1515 \ 1516 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; \ 1517 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; \ 1518 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; \ 1519 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm \ 1520 = denorm_absent; \ 1521 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; \ 1522 \ 1523 static _GLIBCXX_CONSTEXPR TYPE \ 1524 infinity() _GLIBCXX_USE_NOEXCEPT \ 1525 { return static_cast<TYPE>(0); } \ 1526 \ 1527 static _GLIBCXX_CONSTEXPR TYPE \ 1528 quiet_NaN() _GLIBCXX_USE_NOEXCEPT \ 1529 { return static_cast<TYPE>(0); } \ 1530 \ 1531 static _GLIBCXX_CONSTEXPR TYPE \ 1532 signaling_NaN() _GLIBCXX_USE_NOEXCEPT \ 1533 { return static_cast<TYPE>(0); } \ 1534 \ 1535 static _GLIBCXX_CONSTEXPR TYPE \ 1536 denorm_min() _GLIBCXX_USE_NOEXCEPT \ 1537 { return static_cast<TYPE>(0); } \ 1538 \ 1539 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; \ 1540 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; \ 1541 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; \ 1542 \ 1543 static _GLIBCXX_USE_CONSTEXPR bool traps \ 1544 = __glibcxx_integral_traps; \ 1545 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; \ 1546 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style \ 1547 = round_toward_zero; \ 1548 }; \ 1549 \ 1550 __extension__ \ 1551 template<> \ 1552 struct numeric_limits<unsigned TYPE> \ 1553 { \ 1554 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; \ 1555 \ 1556 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1557 min() _GLIBCXX_USE_NOEXCEPT { return 0; } \ 1558 \ 1559 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1560 max() _GLIBCXX_USE_NOEXCEPT \ 1561 { return __glibcxx_max_b (unsigned TYPE, BITSIZE); } \ 1562 \ 1563 UEXT \ 1564 \ 1565 static _GLIBCXX_USE_CONSTEXPR int digits \ 1566 = BITSIZE; \ 1567 static _GLIBCXX_USE_CONSTEXPR int digits10 \ 1568 = BITSIZE * 643L / 2136; \ 1569 static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; \ 1570 static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; \ 1571 static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; \ 1572 static _GLIBCXX_USE_CONSTEXPR int radix = 2; \ 1573 \ 1574 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1575 epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } \ 1576 \ 1577 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1578 round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } \ 1579 \ 1580 static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; \ 1581 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; \ 1582 static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; \ 1583 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; \ 1584 \ 1585 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; \ 1586 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; \ 1587 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; \ 1588 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm \ 1589 = denorm_absent; \ 1590 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; \ 1591 \ 1592 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1593 infinity() _GLIBCXX_USE_NOEXCEPT \ 1594 { return static_cast<unsigned TYPE>(0); } \ 1595 \ 1596 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1597 quiet_NaN() _GLIBCXX_USE_NOEXCEPT \ 1598 { return static_cast<unsigned TYPE>(0); } \ 1599 \ 1600 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1601 signaling_NaN() _GLIBCXX_USE_NOEXCEPT \ 1602 { return static_cast<unsigned TYPE>(0); } \ 1603 \ 1604 static _GLIBCXX_CONSTEXPR unsigned TYPE \ 1605 denorm_min() _GLIBCXX_USE_NOEXCEPT \ 1606 { return static_cast<unsigned TYPE>(0); } \ 1607 \ 1608 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; \ 1609 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; \ 1610 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; \ 1611 \ 1612 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; \ 1613 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; \ 1614 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style \ 1615 = round_toward_zero; \ 1616 }; 1617 1618 #if __cplusplus >= 201103L 1619 1620 #define __INT_N_201103(TYPE) \ 1621 static constexpr TYPE \ 1622 lowest() noexcept { return min(); } \ 1623 static constexpr int max_digits10 = 0; 1624 1625 #define __INT_N_U201103(TYPE) \ 1626 static constexpr unsigned TYPE \ 1627 lowest() noexcept { return min(); } \ 1628 static constexpr int max_digits10 = 0; 1629 1630 #else 1631 #define __INT_N_201103(TYPE) 1632 #define __INT_N_U201103(TYPE) 1633 #endif 1634 1635 #if !defined(__STRICT_ANSI__) 1636 #ifdef __GLIBCXX_TYPE_INT_N_0 1637 __INT_N(__GLIBCXX_TYPE_INT_N_0, __GLIBCXX_BITSIZE_INT_N_0, 1638 __INT_N_201103 (__GLIBCXX_TYPE_INT_N_0), 1639 __INT_N_U201103 (__GLIBCXX_TYPE_INT_N_0)) 1640 #endif 1641 #ifdef __GLIBCXX_TYPE_INT_N_1 1642 __INT_N (__GLIBCXX_TYPE_INT_N_1, __GLIBCXX_BITSIZE_INT_N_1, 1643 __INT_N_201103 (__GLIBCXX_TYPE_INT_N_1), 1644 __INT_N_U201103 (__GLIBCXX_TYPE_INT_N_1)) 1645 #endif 1646 #ifdef __GLIBCXX_TYPE_INT_N_2 1647 __INT_N (__GLIBCXX_TYPE_INT_N_2, __GLIBCXX_BITSIZE_INT_N_2, 1648 __INT_N_201103 (__GLIBCXX_TYPE_INT_N_2), 1649 __INT_N_U201103 (__GLIBCXX_TYPE_INT_N_2)) 1650 #endif 1651 #ifdef __GLIBCXX_TYPE_INT_N_3 1652 __INT_N (__GLIBCXX_TYPE_INT_N_3, __GLIBCXX_BITSIZE_INT_N_3, 1653 __INT_N_201103 (__GLIBCXX_TYPE_INT_N_3), 1654 __INT_N_U201103 (__GLIBCXX_TYPE_INT_N_3)) 1655 #endif 1656 1657 #elif defined __STRICT_ANSI__ && defined __SIZEOF_INT128__ 1658 __INT_N(__int128, 128, 1659 __INT_N_201103 (__int128), 1660 __INT_N_U201103 (__int128)) 1661 #endif 1662 1663 #undef __INT_N 1664 #undef __INT_N_201103 1665 #undef __INT_N_U201103 1666 1667 1668 /// numeric_limits<float> specialization. 1669 template<> 1670 struct numeric_limits<float> 1671 { 1672 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1673 1674 static _GLIBCXX_CONSTEXPR float 1675 min() _GLIBCXX_USE_NOEXCEPT { return __FLT_MIN__; } 1676 1677 static _GLIBCXX_CONSTEXPR float 1678 max() _GLIBCXX_USE_NOEXCEPT { return __FLT_MAX__; } 1679 1680 #if __cplusplus >= 201103L 1681 static constexpr float 1682 lowest() noexcept { return -__FLT_MAX__; } 1683 #endif 1684 1685 static _GLIBCXX_USE_CONSTEXPR int digits = __FLT_MANT_DIG__; 1686 static _GLIBCXX_USE_CONSTEXPR int digits10 = __FLT_DIG__; 1687 #if __cplusplus >= 201103L 1688 static constexpr int max_digits10 1689 = __glibcxx_max_digits10 (__FLT_MANT_DIG__); 1690 #endif 1691 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1692 static _GLIBCXX_USE_CONSTEXPR bool is_integer = false; 1693 static _GLIBCXX_USE_CONSTEXPR bool is_exact = false; 1694 static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__; 1695 1696 static _GLIBCXX_CONSTEXPR float 1697 epsilon() _GLIBCXX_USE_NOEXCEPT { return __FLT_EPSILON__; } 1698 1699 static _GLIBCXX_CONSTEXPR float 1700 round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5F; } 1701 1702 static _GLIBCXX_USE_CONSTEXPR int min_exponent = __FLT_MIN_EXP__; 1703 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __FLT_MIN_10_EXP__; 1704 static _GLIBCXX_USE_CONSTEXPR int max_exponent = __FLT_MAX_EXP__; 1705 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __FLT_MAX_10_EXP__; 1706 1707 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __FLT_HAS_INFINITY__; 1708 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __FLT_HAS_QUIET_NAN__; 1709 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN; 1710 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1711 = bool(__FLT_HAS_DENORM__) ? denorm_present : denorm_absent; 1712 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss 1713 = __glibcxx_float_has_denorm_loss; 1714 1715 static _GLIBCXX_CONSTEXPR float 1716 infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_valf(); } 1717 1718 static _GLIBCXX_CONSTEXPR float 1719 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nanf(""); } 1720 1721 static _GLIBCXX_CONSTEXPR float 1722 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nansf(""); } 1723 1724 static _GLIBCXX_CONSTEXPR float 1725 denorm_min() _GLIBCXX_USE_NOEXCEPT { return __FLT_DENORM_MIN__; } 1726 1727 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 1728 = has_infinity && has_quiet_NaN && has_denorm == denorm_present; 1729 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1730 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1731 1732 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_float_traps; 1733 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before 1734 = __glibcxx_float_tinyness_before; 1735 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1736 = round_to_nearest; 1737 }; 1738 1739 #undef __glibcxx_float_has_denorm_loss 1740 #undef __glibcxx_float_traps 1741 #undef __glibcxx_float_tinyness_before 1742 1743 /// numeric_limits<double> specialization. 1744 template<> 1745 struct numeric_limits<double> 1746 { 1747 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1748 1749 static _GLIBCXX_CONSTEXPR double 1750 min() _GLIBCXX_USE_NOEXCEPT { return __DBL_MIN__; } 1751 1752 static _GLIBCXX_CONSTEXPR double 1753 max() _GLIBCXX_USE_NOEXCEPT { return __DBL_MAX__; } 1754 1755 #if __cplusplus >= 201103L 1756 static constexpr double 1757 lowest() noexcept { return -__DBL_MAX__; } 1758 #endif 1759 1760 static _GLIBCXX_USE_CONSTEXPR int digits = __DBL_MANT_DIG__; 1761 static _GLIBCXX_USE_CONSTEXPR int digits10 = __DBL_DIG__; 1762 #if __cplusplus >= 201103L 1763 static constexpr int max_digits10 1764 = __glibcxx_max_digits10 (__DBL_MANT_DIG__); 1765 #endif 1766 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1767 static _GLIBCXX_USE_CONSTEXPR bool is_integer = false; 1768 static _GLIBCXX_USE_CONSTEXPR bool is_exact = false; 1769 static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__; 1770 1771 static _GLIBCXX_CONSTEXPR double 1772 epsilon() _GLIBCXX_USE_NOEXCEPT { return __DBL_EPSILON__; } 1773 1774 static _GLIBCXX_CONSTEXPR double 1775 round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5; } 1776 1777 static _GLIBCXX_USE_CONSTEXPR int min_exponent = __DBL_MIN_EXP__; 1778 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __DBL_MIN_10_EXP__; 1779 static _GLIBCXX_USE_CONSTEXPR int max_exponent = __DBL_MAX_EXP__; 1780 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __DBL_MAX_10_EXP__; 1781 1782 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __DBL_HAS_INFINITY__; 1783 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __DBL_HAS_QUIET_NAN__; 1784 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN; 1785 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1786 = bool(__DBL_HAS_DENORM__) ? denorm_present : denorm_absent; 1787 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss 1788 = __glibcxx_double_has_denorm_loss; 1789 1790 static _GLIBCXX_CONSTEXPR double 1791 infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_val(); } 1792 1793 static _GLIBCXX_CONSTEXPR double 1794 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nan(""); } 1795 1796 static _GLIBCXX_CONSTEXPR double 1797 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nans(""); } 1798 1799 static _GLIBCXX_CONSTEXPR double 1800 denorm_min() _GLIBCXX_USE_NOEXCEPT { return __DBL_DENORM_MIN__; } 1801 1802 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 1803 = has_infinity && has_quiet_NaN && has_denorm == denorm_present; 1804 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1805 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1806 1807 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_double_traps; 1808 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before 1809 = __glibcxx_double_tinyness_before; 1810 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style 1811 = round_to_nearest; 1812 }; 1813 1814 #undef __glibcxx_double_has_denorm_loss 1815 #undef __glibcxx_double_traps 1816 #undef __glibcxx_double_tinyness_before 1817 1818 /// numeric_limits<long double> specialization. 1819 template<> 1820 struct numeric_limits<long double> 1821 { 1822 static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; 1823 1824 static _GLIBCXX_CONSTEXPR long double 1825 min() _GLIBCXX_USE_NOEXCEPT { return __LDBL_MIN__; } 1826 1827 static _GLIBCXX_CONSTEXPR long double 1828 max() _GLIBCXX_USE_NOEXCEPT { return __LDBL_MAX__; } 1829 1830 #if __cplusplus >= 201103L 1831 static constexpr long double 1832 lowest() noexcept { return -__LDBL_MAX__; } 1833 #endif 1834 1835 static _GLIBCXX_USE_CONSTEXPR int digits = __LDBL_MANT_DIG__; 1836 static _GLIBCXX_USE_CONSTEXPR int digits10 = __LDBL_DIG__; 1837 #if __cplusplus >= 201103L 1838 static _GLIBCXX_USE_CONSTEXPR int max_digits10 1839 = __glibcxx_max_digits10 (__LDBL_MANT_DIG__); 1840 #endif 1841 static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; 1842 static _GLIBCXX_USE_CONSTEXPR bool is_integer = false; 1843 static _GLIBCXX_USE_CONSTEXPR bool is_exact = false; 1844 static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__; 1845 1846 static _GLIBCXX_CONSTEXPR long double 1847 epsilon() _GLIBCXX_USE_NOEXCEPT { return __LDBL_EPSILON__; } 1848 1849 static _GLIBCXX_CONSTEXPR long double 1850 round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5L; } 1851 1852 static _GLIBCXX_USE_CONSTEXPR int min_exponent = __LDBL_MIN_EXP__; 1853 static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __LDBL_MIN_10_EXP__; 1854 static _GLIBCXX_USE_CONSTEXPR int max_exponent = __LDBL_MAX_EXP__; 1855 static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __LDBL_MAX_10_EXP__; 1856 1857 static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __LDBL_HAS_INFINITY__; 1858 static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __LDBL_HAS_QUIET_NAN__; 1859 static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN; 1860 static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm 1861 = bool(__LDBL_HAS_DENORM__) ? denorm_present : denorm_absent; 1862 static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss 1863 = __glibcxx_long_double_has_denorm_loss; 1864 1865 static _GLIBCXX_CONSTEXPR long double 1866 infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_vall(); } 1867 1868 static _GLIBCXX_CONSTEXPR long double 1869 quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nanl(""); } 1870 1871 static _GLIBCXX_CONSTEXPR long double 1872 signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nansl(""); } 1873 1874 static _GLIBCXX_CONSTEXPR long double 1875 denorm_min() _GLIBCXX_USE_NOEXCEPT { return __LDBL_DENORM_MIN__; } 1876 1877 static _GLIBCXX_USE_CONSTEXPR bool is_iec559 1878 = has_infinity && has_quiet_NaN && has_denorm == denorm_present; 1879 static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; 1880 static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; 1881 1882 static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_long_double_traps; 1883 static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = 1884 __glibcxx_long_double_tinyness_before; 1885 static _GLIBCXX_USE_CONSTEXPR float_round_style round_style = 1886 round_to_nearest; 1887 }; 1888 1889 #undef __glibcxx_long_double_has_denorm_loss 1890 #undef __glibcxx_long_double_traps 1891 #undef __glibcxx_long_double_tinyness_before 1892 1893 #if __cplusplus > 202002L 1894 1895 #define __glibcxx_concat3_(P,M,S) P ## M ## S 1896 #define __glibcxx_concat3(P,M,S) __glibcxx_concat3_ (P,M,S) 1897 1898 #define __glibcxx_float_n(BITSIZE) \ 1899 __extension__ \ 1900 template<> \ 1901 struct numeric_limits<_Float##BITSIZE> \ 1902 { \ 1903 static constexpr bool is_specialized = true; \ 1904 \ 1905 static constexpr _Float##BITSIZE \ 1906 min() noexcept \ 1907 { return __glibcxx_concat3 (__FLT, BITSIZE, _MIN__); } \ 1908 \ 1909 static constexpr _Float##BITSIZE \ 1910 max() noexcept \ 1911 { return __glibcxx_concat3 (__FLT, BITSIZE, _MAX__); } \ 1912 \ 1913 static constexpr _Float##BITSIZE \ 1914 lowest() noexcept \ 1915 { return -__glibcxx_concat3 (__FLT, BITSIZE, _MAX__); } \ 1916 \ 1917 static constexpr int digits \ 1918 = __glibcxx_concat3 (__FLT, BITSIZE, _MANT_DIG__); \ 1919 static constexpr int digits10 \ 1920 = __glibcxx_concat3 (__FLT, BITSIZE, _DIG__); \ 1921 static constexpr int max_digits10 \ 1922 = __glibcxx_max_digits10 (__glibcxx_concat3 (__FLT, BITSIZE, \ 1923 _MANT_DIG__)); \ 1924 static constexpr bool is_signed = true; \ 1925 static constexpr bool is_integer = false; \ 1926 static constexpr bool is_exact = false; \ 1927 static constexpr int radix = __FLT_RADIX__; \ 1928 \ 1929 static constexpr _Float##BITSIZE \ 1930 epsilon() noexcept \ 1931 { return __glibcxx_concat3 (__FLT, BITSIZE, _EPSILON__); } \ 1932 \ 1933 static constexpr _Float##BITSIZE \ 1934 round_error() noexcept { return 0.5F##BITSIZE; } \ 1935 \ 1936 static constexpr int min_exponent \ 1937 = __glibcxx_concat3 (__FLT, BITSIZE, _MIN_EXP__); \ 1938 static constexpr int min_exponent10 \ 1939 = __glibcxx_concat3 (__FLT, BITSIZE, _MIN_10_EXP__); \ 1940 static constexpr int max_exponent \ 1941 = __glibcxx_concat3 (__FLT, BITSIZE, _MAX_EXP__); \ 1942 static constexpr int max_exponent10 \ 1943 = __glibcxx_concat3 (__FLT, BITSIZE, _MAX_10_EXP__); \ 1944 \ 1945 static constexpr bool has_infinity \ 1946 = __glibcxx_concat3 (__FLT, BITSIZE, _HAS_INFINITY__); \ 1947 static constexpr bool has_quiet_NaN \ 1948 = __glibcxx_concat3 (__FLT, BITSIZE, _HAS_QUIET_NAN__); \ 1949 static constexpr bool has_signaling_NaN \ 1950 = has_quiet_NaN; \ 1951 static constexpr float_denorm_style has_denorm \ 1952 = bool(__glibcxx_concat3 (__FLT, BITSIZE, _HAS_DENORM__)) \ 1953 ? denorm_present : denorm_absent; \ 1954 static constexpr bool has_denorm_loss = false; \ 1955 \ 1956 static constexpr _Float##BITSIZE \ 1957 infinity() noexcept \ 1958 { return __builtin_huge_valf##BITSIZE(); } \ 1959 \ 1960 static constexpr _Float##BITSIZE \ 1961 quiet_NaN() noexcept \ 1962 { return __builtin_nanf##BITSIZE(""); } \ 1963 \ 1964 static constexpr _Float##BITSIZE \ 1965 signaling_NaN() noexcept \ 1966 { return __builtin_nansf##BITSIZE(""); } \ 1967 \ 1968 static constexpr _Float##BITSIZE \ 1969 denorm_min() noexcept \ 1970 { return __glibcxx_concat3 (__FLT, BITSIZE, _DENORM_MIN__); } \ 1971 \ 1972 static constexpr bool is_iec559 \ 1973 = has_infinity && has_quiet_NaN && has_denorm == denorm_present;\ 1974 static constexpr bool is_bounded = true; \ 1975 static constexpr bool is_modulo = false; \ 1976 \ 1977 static constexpr bool traps = false; \ 1978 static constexpr bool tinyness_before = false; \ 1979 static constexpr float_round_style round_style \ 1980 = round_to_nearest; \ 1981 }; \ 1982 1983 #ifdef __STDCPP_FLOAT16_T__ 1984 __glibcxx_float_n(16) 1985 #endif 1986 #ifdef __STDCPP_FLOAT32_T__ 1987 __glibcxx_float_n(32) 1988 #endif 1989 #ifdef __STDCPP_FLOAT64_T__ 1990 __glibcxx_float_n(64) 1991 #endif 1992 #ifdef __STDCPP_FLOAT128_T__ 1993 __glibcxx_float_n(128) 1994 #endif 1995 #undef __glibcxx_float_n 1996 #undef __glibcxx_concat3 1997 #undef __glibcxx_concat3_ 1998 1999 #ifdef __STDCPP_BFLOAT16_T__ 2000 __extension__ 2001 template<> 2002 struct numeric_limits<__gnu_cxx::__bfloat16_t> 2003 { 2004 static constexpr bool is_specialized = true; 2005 2006 static constexpr __gnu_cxx::__bfloat16_t 2007 min() noexcept 2008 { return __BFLT16_MIN__; } 2009 2010 static constexpr __gnu_cxx::__bfloat16_t 2011 max() noexcept 2012 { return __BFLT16_MAX__; } 2013 2014 static constexpr __gnu_cxx::__bfloat16_t 2015 lowest() noexcept 2016 { return -__BFLT16_MAX__; } 2017 2018 static constexpr int digits = __BFLT16_MANT_DIG__; 2019 static constexpr int digits10 = __BFLT16_DIG__; 2020 static constexpr int max_digits10 2021 = __glibcxx_max_digits10 (__BFLT16_MANT_DIG__); 2022 static constexpr bool is_signed = true; 2023 static constexpr bool is_integer = false; 2024 static constexpr bool is_exact = false; 2025 static constexpr int radix = __FLT_RADIX__; 2026 2027 static constexpr __gnu_cxx::__bfloat16_t 2028 epsilon() noexcept 2029 { return __BFLT16_EPSILON__; } 2030 2031 static constexpr __gnu_cxx::__bfloat16_t 2032 round_error() noexcept { return 0.5BF16; } 2033 2034 static constexpr int min_exponent = __BFLT16_MIN_EXP__; 2035 static constexpr int min_exponent10 = __BFLT16_MIN_10_EXP__; 2036 static constexpr int max_exponent = __BFLT16_MAX_EXP__; 2037 static constexpr int max_exponent10 = __BFLT16_MAX_10_EXP__; 2038 2039 static constexpr bool has_infinity = __BFLT16_HAS_INFINITY__; 2040 static constexpr bool has_quiet_NaN = __BFLT16_HAS_QUIET_NAN__; 2041 static constexpr bool has_signaling_NaN = has_quiet_NaN; 2042 static constexpr float_denorm_style has_denorm 2043 = bool(__BFLT16_HAS_DENORM__) 2044 ? denorm_present : denorm_absent; 2045 static constexpr bool has_denorm_loss = false; 2046 2047 static constexpr __gnu_cxx::__bfloat16_t 2048 infinity() noexcept 2049 { return __gnu_cxx::__bfloat16_t(__builtin_huge_valf()); } 2050 2051 static constexpr __gnu_cxx::__bfloat16_t 2052 quiet_NaN() noexcept 2053 { return __gnu_cxx::__bfloat16_t(__builtin_nanf("")); } 2054 2055 static constexpr __gnu_cxx::__bfloat16_t 2056 signaling_NaN() noexcept 2057 { return __builtin_nansf16b(""); } 2058 2059 static constexpr __gnu_cxx::__bfloat16_t 2060 denorm_min() noexcept 2061 { return __BFLT16_DENORM_MIN__; } 2062 2063 static constexpr bool is_iec559 2064 = has_infinity && has_quiet_NaN && has_denorm == denorm_present; 2065 static constexpr bool is_bounded = true; 2066 static constexpr bool is_modulo = false; 2067 2068 static constexpr bool traps = false; 2069 static constexpr bool tinyness_before = false; 2070 static constexpr float_round_style round_style = round_to_nearest; 2071 }; 2072 #endif 2073 2074 #endif 2075 2076 _GLIBCXX_END_NAMESPACE_VERSION 2077 } // namespace 2078 2079 #undef __glibcxx_signed 2080 #undef __glibcxx_min 2081 #undef __glibcxx_max 2082 #undef __glibcxx_digits 2083 #undef __glibcxx_digits10 2084 #undef __glibcxx_max_digits10 2085 2086 #endif // _GLIBCXX_NUMERIC_LIMITS
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