std::numeric_limits<T>:: is_iec559
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numeric_limits::is_iec559
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(C++11)
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(C++11)
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| Helper types | ||||
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static
const
bool
is_iec559
;
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(until C++11) | |
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static
constexpr
bool
is_iec559
;
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(since C++11) | |
The value of
std::
numeric_limits
<
T
>
::
is_iec559
is
true
for all floating-point types
T
which fulfill the requirements of IEC 559 (
IEEE 754
) standard. If
std::
numeric_limits
<
T
>
::
is_iec559
is
true
, then
std::
numeric_limits
<
T
>
::
has_infinity
,
std::
numeric_limits
<
T
>
::
has_quiet_NaN
, and
std::
numeric_limits
<
T
>
::
has_signaling_NaN
are also
true
.
Standard specializations
T
|
value of std:: numeric_limits < T > :: is_iec559 |
| /* non-specialized */ | false |
| bool | false |
| char | false |
| signed char | false |
| unsigned char | false |
| wchar_t | false |
| char8_t (since C++20) | false |
| char16_t (since C++11) | false |
| char32_t (since C++11) | false |
| short | false |
| unsigned short | false |
| int | false |
| unsigned int | false |
| long | false |
| unsigned long | false |
| long long (since C++11) | false |
| unsigned long long (since C++11) | false |
| float | usually true |
| double | usually true |
| long double | usually true |
See also
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[static]
|
identifies floating-point types that can represent the special value "positive infinity"
(public static member constant) |
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[static]
|
identifies floating-point types that can represent the special value "quiet not-a-number" (NaN)
(public static member constant) |
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[static]
|
identifies floating-point types that can represent the special value "signaling not-a-number" (NaN)
(public static member constant) |