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limits@ 1181

Last change on this file since 1181 was 1166, checked in by rossy, 3 years ago
Daodan: Replace MinGW build env with an up-to-date MSYS2 env
File size: 70.0 KB

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[1166]	1	// The template and inlines for the numeric_limits classes. -- C++ --
	2
	3	// Copyright (C) 1999-2021 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	template<> \
	1482	struct numeric_limits<TYPE> \
	1483	{ \
	1484	static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; \
	1485	\
	1486	static _GLIBCXX_CONSTEXPR TYPE \
	1487	min() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_min_b (TYPE, BITSIZE); } \
	1488	\
	1489	static _GLIBCXX_CONSTEXPR TYPE \
	1490	max() _GLIBCXX_USE_NOEXCEPT { return __glibcxx_max_b (TYPE, BITSIZE); } \
	1491	\
	1492	static _GLIBCXX_USE_CONSTEXPR int digits \
	1493	= BITSIZE - 1; \
	1494	static _GLIBCXX_USE_CONSTEXPR int digits10 \
	1495	= (BITSIZE - 1) * 643L / 2136; \
	1496	\
	1497	static _GLIBCXX_USE_CONSTEXPR bool is_signed = true; \
	1498	static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; \
	1499	static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; \
	1500	static _GLIBCXX_USE_CONSTEXPR int radix = 2; \
	1501	\
	1502	static _GLIBCXX_CONSTEXPR TYPE \
	1503	epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } \
	1504	\
	1505	static _GLIBCXX_CONSTEXPR TYPE \
	1506	round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } \
	1507	\
	1508	EXT \
	1509	\
	1510	static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; \
	1511	static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; \
	1512	static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; \
	1513	static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; \
	1514	\
	1515	static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; \
	1516	static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; \
	1517	static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; \
	1518	static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm \
	1519	= denorm_absent; \
	1520	static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; \
	1521	\
	1522	static _GLIBCXX_CONSTEXPR TYPE \
	1523	infinity() _GLIBCXX_USE_NOEXCEPT \
	1524	{ return static_cast<TYPE>(0); } \
	1525	\
	1526	static _GLIBCXX_CONSTEXPR TYPE \
	1527	quiet_NaN() _GLIBCXX_USE_NOEXCEPT \
	1528	{ return static_cast<TYPE>(0); } \
	1529	\
	1530	static _GLIBCXX_CONSTEXPR TYPE \
	1531	signaling_NaN() _GLIBCXX_USE_NOEXCEPT \
	1532	{ return static_cast<TYPE>(0); } \
	1533	\
	1534	static _GLIBCXX_CONSTEXPR TYPE \
	1535	denorm_min() _GLIBCXX_USE_NOEXCEPT \
	1536	{ return static_cast<TYPE>(0); } \
	1537	\
	1538	static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; \
	1539	static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; \
	1540	static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false; \
	1541	\
	1542	static _GLIBCXX_USE_CONSTEXPR bool traps \
	1543	= __glibcxx_integral_traps; \
	1544	static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; \
	1545	static _GLIBCXX_USE_CONSTEXPR float_round_style round_style \
	1546	= round_toward_zero; \
	1547	}; \
	1548	\
	1549	template<> \
	1550	struct numeric_limits<unsigned TYPE> \
	1551	{ \
	1552	static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true; \
	1553	\
	1554	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1555	min() _GLIBCXX_USE_NOEXCEPT { return 0; } \
	1556	\
	1557	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1558	max() _GLIBCXX_USE_NOEXCEPT \
	1559	{ return __glibcxx_max_b (unsigned TYPE, BITSIZE); } \
	1560	\
	1561	UEXT \
	1562	\
	1563	static _GLIBCXX_USE_CONSTEXPR int digits \
	1564	= BITSIZE; \
	1565	static _GLIBCXX_USE_CONSTEXPR int digits10 \
	1566	= BITSIZE * 643L / 2136; \
	1567	static _GLIBCXX_USE_CONSTEXPR bool is_signed = false; \
	1568	static _GLIBCXX_USE_CONSTEXPR bool is_integer = true; \
	1569	static _GLIBCXX_USE_CONSTEXPR bool is_exact = true; \
	1570	static _GLIBCXX_USE_CONSTEXPR int radix = 2; \
	1571	\
	1572	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1573	epsilon() _GLIBCXX_USE_NOEXCEPT { return 0; } \
	1574	\
	1575	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1576	round_error() _GLIBCXX_USE_NOEXCEPT { return 0; } \
	1577	\
	1578	static _GLIBCXX_USE_CONSTEXPR int min_exponent = 0; \
	1579	static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = 0; \
	1580	static _GLIBCXX_USE_CONSTEXPR int max_exponent = 0; \
	1581	static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = 0; \
	1582	\
	1583	static _GLIBCXX_USE_CONSTEXPR bool has_infinity = false; \
	1584	static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = false; \
	1585	static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = false; \
	1586	static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm \
	1587	= denorm_absent; \
	1588	static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss = false; \
	1589	\
	1590	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1591	infinity() _GLIBCXX_USE_NOEXCEPT \
	1592	{ return static_cast<unsigned TYPE>(0); } \
	1593	\
	1594	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1595	quiet_NaN() _GLIBCXX_USE_NOEXCEPT \
	1596	{ return static_cast<unsigned TYPE>(0); } \
	1597	\
	1598	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1599	signaling_NaN() _GLIBCXX_USE_NOEXCEPT \
	1600	{ return static_cast<unsigned TYPE>(0); } \
	1601	\
	1602	static _GLIBCXX_CONSTEXPR unsigned TYPE \
	1603	denorm_min() _GLIBCXX_USE_NOEXCEPT \
	1604	{ return static_cast<unsigned TYPE>(0); } \
	1605	\
	1606	static _GLIBCXX_USE_CONSTEXPR bool is_iec559 = false; \
	1607	static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true; \
	1608	static _GLIBCXX_USE_CONSTEXPR bool is_modulo = true; \
	1609	\
	1610	static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_integral_traps; \
	1611	static _GLIBCXX_USE_CONSTEXPR bool tinyness_before = false; \
	1612	static _GLIBCXX_USE_CONSTEXPR float_round_style round_style \
	1613	= round_toward_zero; \
	1614	};
	1615
	1616	#if __cplusplus >= 201103L
	1617
	1618	#define __INT_N_201103(TYPE) \
	1619	static constexpr TYPE \
	1620	lowest() noexcept { return min(); } \
	1621	static constexpr int max_digits10 = 0;
	1622
	1623	#define __INT_N_U201103(TYPE) \
	1624	static constexpr unsigned TYPE \
	1625	lowest() noexcept { return min(); } \
	1626	static constexpr int max_digits10 = 0;
	1627
	1628	#else
	1629	#define __INT_N_201103(TYPE)
	1630	#define __INT_N_U201103(TYPE)
	1631	#endif
	1632
	1633	#if !defined(__STRICT_ANSI__)
	1634	#ifdef __GLIBCXX_TYPE_INT_N_0
	1635	__INT_N(__GLIBCXX_TYPE_INT_N_0, __GLIBCXX_BITSIZE_INT_N_0,
	1636	__INT_N_201103 (__GLIBCXX_TYPE_INT_N_0),
	1637	__INT_N_U201103 (__GLIBCXX_TYPE_INT_N_0))
	1638	#endif
	1639	#ifdef __GLIBCXX_TYPE_INT_N_1
	1640	__INT_N (__GLIBCXX_TYPE_INT_N_1, __GLIBCXX_BITSIZE_INT_N_1,
	1641	__INT_N_201103 (__GLIBCXX_TYPE_INT_N_1),
	1642	__INT_N_U201103 (__GLIBCXX_TYPE_INT_N_1))
	1643	#endif
	1644	#ifdef __GLIBCXX_TYPE_INT_N_2
	1645	__INT_N (__GLIBCXX_TYPE_INT_N_2, __GLIBCXX_BITSIZE_INT_N_2,
	1646	__INT_N_201103 (__GLIBCXX_TYPE_INT_N_2),
	1647	__INT_N_U201103 (__GLIBCXX_TYPE_INT_N_2))
	1648	#endif
	1649	#ifdef __GLIBCXX_TYPE_INT_N_3
	1650	__INT_N (__GLIBCXX_TYPE_INT_N_3, __GLIBCXX_BITSIZE_INT_N_3,
	1651	__INT_N_201103 (__GLIBCXX_TYPE_INT_N_3),
	1652	__INT_N_U201103 (__GLIBCXX_TYPE_INT_N_3))
	1653	#endif
	1654
	1655	#elif defined __STRICT_ANSI__ && defined __SIZEOF_INT128__
	1656	__INT_N(__int128, 128,
	1657	__INT_N_201103 (__int128),
	1658	__INT_N_U201103 (__int128))
	1659	#endif
	1660
	1661	#undef __INT_N
	1662	#undef __INT_N_201103
	1663	#undef __INT_N_U201103
	1664
	1665
	1666	/// numeric_limits<float> specialization.
	1667	template<>
	1668	struct numeric_limits<float>
	1669	{
	1670	static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true;
	1671
	1672	static _GLIBCXX_CONSTEXPR float
	1673	min() _GLIBCXX_USE_NOEXCEPT { return __FLT_MIN__; }
	1674
	1675	static _GLIBCXX_CONSTEXPR float
	1676	max() _GLIBCXX_USE_NOEXCEPT { return __FLT_MAX__; }
	1677
	1678	#if __cplusplus >= 201103L
	1679	static constexpr float
	1680	lowest() noexcept { return -__FLT_MAX__; }
	1681	#endif
	1682
	1683	static _GLIBCXX_USE_CONSTEXPR int digits = __FLT_MANT_DIG__;
	1684	static _GLIBCXX_USE_CONSTEXPR int digits10 = __FLT_DIG__;
	1685	#if __cplusplus >= 201103L
	1686	static constexpr int max_digits10
	1687	= __glibcxx_max_digits10 (__FLT_MANT_DIG__);
	1688	#endif
	1689	static _GLIBCXX_USE_CONSTEXPR bool is_signed = true;
	1690	static _GLIBCXX_USE_CONSTEXPR bool is_integer = false;
	1691	static _GLIBCXX_USE_CONSTEXPR bool is_exact = false;
	1692	static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__;
	1693
	1694	static _GLIBCXX_CONSTEXPR float
	1695	epsilon() _GLIBCXX_USE_NOEXCEPT { return __FLT_EPSILON__; }
	1696
	1697	static _GLIBCXX_CONSTEXPR float
	1698	round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5F; }
	1699
	1700	static _GLIBCXX_USE_CONSTEXPR int min_exponent = __FLT_MIN_EXP__;
	1701	static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __FLT_MIN_10_EXP__;
	1702	static _GLIBCXX_USE_CONSTEXPR int max_exponent = __FLT_MAX_EXP__;
	1703	static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __FLT_MAX_10_EXP__;
	1704
	1705	static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __FLT_HAS_INFINITY__;
	1706	static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __FLT_HAS_QUIET_NAN__;
	1707	static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN;
	1708	static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm
	1709	= bool(__FLT_HAS_DENORM__) ? denorm_present : denorm_absent;
	1710	static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss
	1711	= __glibcxx_float_has_denorm_loss;
	1712
	1713	static _GLIBCXX_CONSTEXPR float
	1714	infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_valf(); }
	1715
	1716	static _GLIBCXX_CONSTEXPR float
	1717	quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nanf(""); }
	1718
	1719	static _GLIBCXX_CONSTEXPR float
	1720	signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nansf(""); }
	1721
	1722	static _GLIBCXX_CONSTEXPR float
	1723	denorm_min() _GLIBCXX_USE_NOEXCEPT { return __FLT_DENORM_MIN__; }
	1724
	1725	static _GLIBCXX_USE_CONSTEXPR bool is_iec559
	1726	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
	1727	static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
	1728	static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
	1729
	1730	static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_float_traps;
	1731	static _GLIBCXX_USE_CONSTEXPR bool tinyness_before
	1732	= __glibcxx_float_tinyness_before;
	1733	static _GLIBCXX_USE_CONSTEXPR float_round_style round_style
	1734	= round_to_nearest;
	1735	};
	1736
	1737	#undef __glibcxx_float_has_denorm_loss
	1738	#undef __glibcxx_float_traps
	1739	#undef __glibcxx_float_tinyness_before
	1740
	1741	/// numeric_limits<double> specialization.
	1742	template<>
	1743	struct numeric_limits<double>
	1744	{
	1745	static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true;
	1746
	1747	static _GLIBCXX_CONSTEXPR double
	1748	min() _GLIBCXX_USE_NOEXCEPT { return __DBL_MIN__; }
	1749
	1750	static _GLIBCXX_CONSTEXPR double
	1751	max() _GLIBCXX_USE_NOEXCEPT { return __DBL_MAX__; }
	1752
	1753	#if __cplusplus >= 201103L
	1754	static constexpr double
	1755	lowest() noexcept { return -__DBL_MAX__; }
	1756	#endif
	1757
	1758	static _GLIBCXX_USE_CONSTEXPR int digits = __DBL_MANT_DIG__;
	1759	static _GLIBCXX_USE_CONSTEXPR int digits10 = __DBL_DIG__;
	1760	#if __cplusplus >= 201103L
	1761	static constexpr int max_digits10
	1762	= __glibcxx_max_digits10 (__DBL_MANT_DIG__);
	1763	#endif
	1764	static _GLIBCXX_USE_CONSTEXPR bool is_signed = true;
	1765	static _GLIBCXX_USE_CONSTEXPR bool is_integer = false;
	1766	static _GLIBCXX_USE_CONSTEXPR bool is_exact = false;
	1767	static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__;
	1768
	1769	static _GLIBCXX_CONSTEXPR double
	1770	epsilon() _GLIBCXX_USE_NOEXCEPT { return __DBL_EPSILON__; }
	1771
	1772	static _GLIBCXX_CONSTEXPR double
	1773	round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5; }
	1774
	1775	static _GLIBCXX_USE_CONSTEXPR int min_exponent = __DBL_MIN_EXP__;
	1776	static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __DBL_MIN_10_EXP__;
	1777	static _GLIBCXX_USE_CONSTEXPR int max_exponent = __DBL_MAX_EXP__;
	1778	static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __DBL_MAX_10_EXP__;
	1779
	1780	static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __DBL_HAS_INFINITY__;
	1781	static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __DBL_HAS_QUIET_NAN__;
	1782	static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN;
	1783	static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm
	1784	= bool(__DBL_HAS_DENORM__) ? denorm_present : denorm_absent;
	1785	static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss
	1786	= __glibcxx_double_has_denorm_loss;
	1787
	1788	static _GLIBCXX_CONSTEXPR double
	1789	infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_val(); }
	1790
	1791	static _GLIBCXX_CONSTEXPR double
	1792	quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nan(""); }
	1793
	1794	static _GLIBCXX_CONSTEXPR double
	1795	signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nans(""); }
	1796
	1797	static _GLIBCXX_CONSTEXPR double
	1798	denorm_min() _GLIBCXX_USE_NOEXCEPT { return __DBL_DENORM_MIN__; }
	1799
	1800	static _GLIBCXX_USE_CONSTEXPR bool is_iec559
	1801	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
	1802	static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
	1803	static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
	1804
	1805	static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_double_traps;
	1806	static _GLIBCXX_USE_CONSTEXPR bool tinyness_before
	1807	= __glibcxx_double_tinyness_before;
	1808	static _GLIBCXX_USE_CONSTEXPR float_round_style round_style
	1809	= round_to_nearest;
	1810	};
	1811
	1812	#undef __glibcxx_double_has_denorm_loss
	1813	#undef __glibcxx_double_traps
	1814	#undef __glibcxx_double_tinyness_before
	1815
	1816	/// numeric_limits<long double> specialization.
	1817	template<>
	1818	struct numeric_limits<long double>
	1819	{
	1820	static _GLIBCXX_USE_CONSTEXPR bool is_specialized = true;
	1821
	1822	static _GLIBCXX_CONSTEXPR long double
	1823	min() _GLIBCXX_USE_NOEXCEPT { return __LDBL_MIN__; }
	1824
	1825	static _GLIBCXX_CONSTEXPR long double
	1826	max() _GLIBCXX_USE_NOEXCEPT { return __LDBL_MAX__; }
	1827
	1828	#if __cplusplus >= 201103L
	1829	static constexpr long double
	1830	lowest() noexcept { return -__LDBL_MAX__; }
	1831	#endif
	1832
	1833	static _GLIBCXX_USE_CONSTEXPR int digits = __LDBL_MANT_DIG__;
	1834	static _GLIBCXX_USE_CONSTEXPR int digits10 = __LDBL_DIG__;
	1835	#if __cplusplus >= 201103L
	1836	static _GLIBCXX_USE_CONSTEXPR int max_digits10
	1837	= __glibcxx_max_digits10 (__LDBL_MANT_DIG__);
	1838	#endif
	1839	static _GLIBCXX_USE_CONSTEXPR bool is_signed = true;
	1840	static _GLIBCXX_USE_CONSTEXPR bool is_integer = false;
	1841	static _GLIBCXX_USE_CONSTEXPR bool is_exact = false;
	1842	static _GLIBCXX_USE_CONSTEXPR int radix = __FLT_RADIX__;
	1843
	1844	static _GLIBCXX_CONSTEXPR long double
	1845	epsilon() _GLIBCXX_USE_NOEXCEPT { return __LDBL_EPSILON__; }
	1846
	1847	static _GLIBCXX_CONSTEXPR long double
	1848	round_error() _GLIBCXX_USE_NOEXCEPT { return 0.5L; }
	1849
	1850	static _GLIBCXX_USE_CONSTEXPR int min_exponent = __LDBL_MIN_EXP__;
	1851	static _GLIBCXX_USE_CONSTEXPR int min_exponent10 = __LDBL_MIN_10_EXP__;
	1852	static _GLIBCXX_USE_CONSTEXPR int max_exponent = __LDBL_MAX_EXP__;
	1853	static _GLIBCXX_USE_CONSTEXPR int max_exponent10 = __LDBL_MAX_10_EXP__;
	1854
	1855	static _GLIBCXX_USE_CONSTEXPR bool has_infinity = __LDBL_HAS_INFINITY__;
	1856	static _GLIBCXX_USE_CONSTEXPR bool has_quiet_NaN = __LDBL_HAS_QUIET_NAN__;
	1857	static _GLIBCXX_USE_CONSTEXPR bool has_signaling_NaN = has_quiet_NaN;
	1858	static _GLIBCXX_USE_CONSTEXPR float_denorm_style has_denorm
	1859	= bool(__LDBL_HAS_DENORM__) ? denorm_present : denorm_absent;
	1860	static _GLIBCXX_USE_CONSTEXPR bool has_denorm_loss
	1861	= __glibcxx_long_double_has_denorm_loss;
	1862
	1863	static _GLIBCXX_CONSTEXPR long double
	1864	infinity() _GLIBCXX_USE_NOEXCEPT { return __builtin_huge_vall(); }
	1865
	1866	static _GLIBCXX_CONSTEXPR long double
	1867	quiet_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nanl(""); }
	1868
	1869	static _GLIBCXX_CONSTEXPR long double
	1870	signaling_NaN() _GLIBCXX_USE_NOEXCEPT { return __builtin_nansl(""); }
	1871
	1872	static _GLIBCXX_CONSTEXPR long double
	1873	denorm_min() _GLIBCXX_USE_NOEXCEPT { return __LDBL_DENORM_MIN__; }
	1874
	1875	static _GLIBCXX_USE_CONSTEXPR bool is_iec559
	1876	= has_infinity && has_quiet_NaN && has_denorm == denorm_present;
	1877	static _GLIBCXX_USE_CONSTEXPR bool is_bounded = true;
	1878	static _GLIBCXX_USE_CONSTEXPR bool is_modulo = false;
	1879
	1880	static _GLIBCXX_USE_CONSTEXPR bool traps = __glibcxx_long_double_traps;
	1881	static _GLIBCXX_USE_CONSTEXPR bool tinyness_before =
	1882	__glibcxx_long_double_tinyness_before;
	1883	static _GLIBCXX_USE_CONSTEXPR float_round_style round_style =
	1884	round_to_nearest;
	1885	};
	1886
	1887	#undef __glibcxx_long_double_has_denorm_loss
	1888	#undef __glibcxx_long_double_traps
	1889	#undef __glibcxx_long_double_tinyness_before
	1890
	1891	_GLIBCXX_END_NAMESPACE_VERSION
	1892	} // namespace
	1893
	1894	#undef __glibcxx_signed
	1895	#undef __glibcxx_min
	1896	#undef __glibcxx_max
	1897	#undef __glibcxx_digits
	1898	#undef __glibcxx_digits10
	1899	#undef __glibcxx_max_digits10
	1900
	1901	#endif // _GLIBCXX_NUMERIC_LIMITS

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source: Daodan/MSYS2/mingw32/include/c++/11.2.0/limits@ 1181

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