std::numeric_limits(3)std::numeric_limits(3)NAMEstd::numeric_limits-
Properties of fundamental types.
SYNOPSIS
Inherits std::__numeric_limits_base.
Static Public Member Functions
static _Tp denorm_min () throw ()
static _Tp epsilon () throw ()
static _Tp infinity () throw ()
static _Tp max () throw ()
static _Tp min () throw ()
static _Tp quiet_NaN () throw ()
static _Tp round_error () throw ()
static _Tp signaling_NaN () throw ()
Static Public Attributes
static const int digits
static const int digits10
static const float_denorm_style has_denorm
static const bool has_denorm_loss
static const bool has_infinity
static const bool has_quiet_NaN
static const bool has_signaling_NaN
static const bool is_bounded
static const bool is_exact
static const bool is_iec559
static const bool is_integer
static const bool is_modulo
static const bool is_signed
static const bool is_specialized
static const int max_exponent
static const int max_exponent10
static const int min_exponent
static const int min_exponent10
static const int radix
static const float_round_style round_style
static const bool tinyness_before
static const bool traps
Detailed Description
template<typename _Tp> struct std::numeric_limits< _Tp >
Properties of fundamental types.
This class allows a program to obtain information about the
representation of a fundamental type on a given platform. For non-
fundamental types, the functions will return 0 and the data members
will all be false.
_GLIBCXX_RESOLVE_LIB_DEFECTS: DRs 201 and 184 (hi Gaby!) are noted, but
not incorporated in this documented (yet).
Definition at line 278 of file limits.
Member Function Documentation
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::denorm_min ()
throw () [inline, static] The minimum positive denormalized value. For
types where has_denorm is false, this is the minimum positive
normalized value.
Definition at line 300 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::epsilon ()
throw () [inline, static] The machine epsilon: the difference between 1
and the least value greater than 1 that is representable.
Definition at line 287 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::infinity ()
throw () [inline, static] The representation of positive infinity, if
has_infinity.
Definition at line 291 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::max () throw
() [inline, static] The maximum finite value.
Definition at line 284 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::min () throw
() [inline, static] The minimum finite value, or for floating types
with denormalization, the minimum positive normalized value.
Definition at line 282 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::quiet_NaN ()
throw () [inline, static] The representation of a quiet 'Not a Number,'
if has_quiet_NaN.
Definition at line 293 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::round_error
() throw () [inline, static] The maximum rounding error measurement
(see LIA-1).
Definition at line 289 of file limits.
template<typename _Tp> static _Tp std::numeric_limits< _Tp >::signaling_NaN
() throw () [inline, static] The representation of a signaling 'Not a
Number,' if has_signaling_NaN.
Definition at line 296 of file limits.
Member Data Documentation
const int std::__numeric_limits_base::digits [static, inherited] 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.
Definition at line 197 of file limits.
const int std::__numeric_limits_base::digits10 [static, inherited] The
number of base 10 digits that can be represented without change.
Definition at line 199 of file limits.
const float_denorm_style std::__numeric_limits_base::has_denorm [static,
inherited] See std::float_denorm_style for more information.
Definition at line 238 of file limits.
const bool std::__numeric_limits_base::has_denorm_loss [static, inherited]
'True if loss of accuracy is detected as a denormalization loss,
rather than as an inexact result.' [18.2.1.2]/42
Definition at line 241 of file limits.
const bool std::__numeric_limits_base::has_infinity [static, inherited]
True if the type has a representation for positive infinity.
Definition at line 230 of file limits.
const bool std::__numeric_limits_base::has_quiet_NaN [static, inherited]
True if the type has a representation for a quiet (non-signaling) 'Not
a Number.'
Definition at line 233 of file limits.
const bool std::__numeric_limits_base::has_signaling_NaN [static,
inherited] True if the type has a representation for a signaling 'Not a
Number.'
Definition at line 236 of file limits.
const bool std::__numeric_limits_base::is_bounded [static, inherited] 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. [18.2.1.2]/54
Definition at line 249 of file limits.
const bool std::__numeric_limits_base::is_exact [static, inherited] 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. [18.2.1.2]/15
Definition at line 210 of file limits.
const bool std::__numeric_limits_base::is_iec559 [static, inherited] 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.)
Definition at line 245 of file limits.
const bool std::__numeric_limits_base::is_integer [static, inherited] True
if the type is integer. Is this supposed to be 'if the type is
integral'?
Definition at line 205 of file limits.
const bool std::__numeric_limits_base::is_modulo [static, inherited] True
if the type is modulo, that is, if it is possible to add two positive
numbers and have a result that wraps around to a third number that is
less. Typically false for floating types, true for unsigned integers,
and true for signed integers.
Definition at line 254 of file limits.
const bool std::__numeric_limits_base::is_signed [static, inherited] True
if the type is signed.
Definition at line 201 of file limits.
const bool std::__numeric_limits_base::is_specialized [static, inherited]
This will be true for all fundamental types (which have
specializations), and false for everything else.
Definition at line 192 of file limits.
const int std::__numeric_limits_base::max_exponent [static, inherited] The
maximum positive integer such that radix raised to the power of (one
less than that integer) is a representable finite floating point
number.
Definition at line 224 of file limits.
const int std::__numeric_limits_base::max_exponent10 [static, inherited]
The maximum positive integer such that 10 raised to that power is in
the range of representable finite floating point numbers.
Definition at line 227 of file limits.
const int std::__numeric_limits_base::min_exponent [static, inherited] The
minimum negative integer such that radix raised to the power of (one
less than that integer) is a normalized floating point number.
Definition at line 217 of file limits.
const int std::__numeric_limits_base::min_exponent10 [static, inherited]
The minimum negative integer such that 10 raised to that power is in
the range of normalized floating point numbers.
Definition at line 220 of file limits.
const int std::__numeric_limits_base::radix [static, inherited] For integer
types, specifies the base of the representation. For floating types,
specifies the base of the exponent representation.
Definition at line 213 of file limits.
const float_round_style std::__numeric_limits_base::round_style [static,
inherited] See std::float_round_style for more information. This is
only meaningful for floating types; integer types will all be
round_toward_zero.
Definition at line 263 of file limits.
const bool std::__numeric_limits_base::tinyness_before [static, inherited]
True if tininess is detected before rounding. (see IEC 559)
Definition at line 259 of file limits.
const bool std::__numeric_limits_base::traps [static, inherited] True if
trapping is implemented for this type.
Definition at line 257 of file limits.
Author
Generated automatically by Doxygen for libstdc++ from the source code.
libstdc++ 22 Nov 2013 std::numeric_limits(3)
