std::numeric_limits<T>::is_iec559

From cppreference.com
< cpp‎ | types‎ | numeric limits
C++
Utilities library
General utilities
Relational operators (deprecated in C++20)
Integer comparison functions
(C++20)(C++20)(C++20)
(C++20)
Swap and type operations
(C++20)
(C++14)
(C++11)
(C++23)
(C++11)
(C++23)
(C++11)
(C++11)
(C++17)
Common vocabulary types
(C++11)
(C++17)
(C++17)
(C++17)
(C++11)
(C++11)
(C++17)
(C++17)
(C++23)



Type support
std::numeric_limits
Static constants
numeric_limits::is_iec559
(C++11)
Static member functions
(C++11)
Helper types
static const bool is_iec559;
 (until C++11)
static constexpr bool is_iec559;
 (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

[static]
 identifies floating-point types that can represent the special value "positive infinity"
(public static member constant)
[static]
 identifies floating-point types that can represent the special value "quiet not-a-number" (NaN)
(public static member constant)
[static]
 identifies floating-point types that can represent the special value "signaling not-a-number" (NaN)
(public static member constant)
Retrieved from "https://en.cppreference.com/mwiki/index.php?title=cpp/types/numeric_limits/is_iec559&oldid=148385