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std::__numeric_limits_base(3) Library Functions Manual std::__numeric_limits_base(3)

NAME

std::__numeric_limits_base - Part of std::numeric_limits.

SYNOPSIS

Inherited by std::numeric_limits< _Tp >.

Static Public Attributes


static constexpr int digits
static constexpr int digits10
static constexpr float_denorm_style has_denorm
static constexpr bool has_denorm_loss
static constexpr bool has_infinity
static constexpr bool has_quiet_NaN
static constexpr bool has_signaling_NaN
static constexpr bool is_bounded
static constexpr bool is_exact
static constexpr bool is_iec559
static constexpr bool is_integer
static constexpr bool is_modulo
static constexpr bool is_signed
static constexpr bool is_specialized
static constexpr int max_digits10
static constexpr int max_exponent
static constexpr int max_exponent10
static constexpr int min_exponent
static constexpr int min_exponent10
static constexpr int radix
static constexpr float_round_style round_style
static constexpr bool tinyness_before
static constexpr bool traps

Detailed Description

Part of std::numeric_limits.

The static const members are usable as integral constant expressions.

Note

This is a separate class for purposes of efficiency; you should only access these members as part of an instantiation of the std::numeric_limits class.

Member Data Documentation

constexpr int std::__numeric_limits_base::digits [static], [constexpr]

The number of radix digits that be represented without change: for integer types, the number of non-sign bits in the mantissa; for floating types, the number of radix digits in the mantissa.

constexpr int std::__numeric_limits_base::digits10 [static], [constexpr]

The number of base 10 digits that can be represented without change.

constexpr float_denorm_style std::__numeric_limits_base::has_denorm [static], [constexpr]

See std::float_denorm_style for more information.

constexpr bool std::__numeric_limits_base::has_denorm_loss [static], [constexpr]

True if loss of accuracy is detected as a denormalization loss, rather than as an inexact result.

constexpr bool std::__numeric_limits_base::has_infinity [static], [constexpr]

True if the type has a representation for positive infinity.

constexpr bool std::__numeric_limits_base::has_quiet_NaN [static], [constexpr]

True if the type has a representation for a quiet (non-signaling) Not a Number.

constexpr bool std::__numeric_limits_base::has_signaling_NaN [static], [constexpr]

True if the type has a representation for a signaling Not a Number.

constexpr bool std::__numeric_limits_base::is_bounded [static], [constexpr]

True if the set of values representable by the type is finite. All built-in types are bounded, this member would be false for arbitrary precision types.

constexpr bool std::__numeric_limits_base::is_exact [static], [constexpr]

True if the type uses an exact representation. All integer types are exact, but not all exact types are integer. For example, rational and fixed-exponent representations are exact but not integer.

constexpr bool std::__numeric_limits_base::is_iec559 [static], [constexpr]

True if-and-only-if the type adheres to the IEC 559 standard, also known as IEEE 754. (Only makes sense for floating point types.)

constexpr bool std::__numeric_limits_base::is_integer [static], [constexpr]

True if the type is integer.

constexpr bool std::__numeric_limits_base::is_modulo [static], [constexpr]

True if the type is modulo. A type is modulo if, for any operation involving +, -, or * on values of that type whose result would fall outside the range [min(),max()], the value returned differs from the true value by an integer multiple of max() - min() + 1. On most machines, this is false for floating types, true for unsigned integers, and true for signed integers. See PR22200 about signed integers.

constexpr bool std::__numeric_limits_base::is_signed [static], [constexpr]

True if the type is signed.

constexpr bool std::__numeric_limits_base::is_specialized [static], [constexpr]

This will be true for all fundamental types (which have specializations), and false for everything else.

constexpr int std::__numeric_limits_base::max_digits10 [static], [constexpr]

The number of base 10 digits required to ensure that values which differ are always differentiated.

constexpr int std::__numeric_limits_base::max_exponent [static], [constexpr]

The maximum positive integer such that radix raised to the power of (one less than that integer) is a representable finite floating point number.

constexpr int std::__numeric_limits_base::max_exponent10 [static], [constexpr]

The maximum positive integer such that 10 raised to that power is in the range of representable finite floating point numbers.

constexpr int std::__numeric_limits_base::min_exponent [static], [constexpr]

The minimum negative integer such that radix raised to the power of (one less than that integer) is a normalized floating point number.

constexpr int std::__numeric_limits_base::min_exponent10 [static], [constexpr]

The minimum negative integer such that 10 raised to that power is in the range of normalized floating point numbers.

constexpr int std::__numeric_limits_base::radix [static], [constexpr]

For integer types, specifies the base of the representation. For floating types, specifies the base of the exponent representation.

constexpr float_round_style std::__numeric_limits_base::round_style [static], [constexpr]

See std::float_round_style for more information. This is only meaningful for floating types; integer types will all be round_toward_zero.

constexpr bool std::__numeric_limits_base::tinyness_before [static], [constexpr]

True if tininess is detected before rounding. (see IEC 559)

constexpr bool std::__numeric_limits_base::traps [static], [constexpr]

True if trapping is implemented for this type.

Author

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Mon Dec 18 2023 libstdc++