std::numeric_limits<T>::is_signed
< cpp | types | numeric limits
static const bool is_signed; |
(until C++11) | |
static constexpr bool is_signed; |
(since C++11) | |
The value of std::numeric_limits<T>::is_signed is true for all signed arithmetic types T
and false for the unsigned types. This constant is meaningful for all specializations.
Standard specializations
T
|
value of std::numeric_limits<T>::is_signed |
/* non-specialized */ | false |
bool | false |
char | implementation-defined |
signed char | true |
unsigned char | false |
wchar_t | implementation-defined |
char8_t | false |
char16_t | false |
char32_t | false |
short | true |
unsigned short | false |
int | true |
unsigned int | false |
long | true |
unsigned long | false |
long long | true |
unsigned long long | false |
float | true |
double | true |
long double | true |
See also
(C++11) |
checks if a type is a signed arithmetic type (class template) |
[static] |
identifies integer types (public static member constant) |
[static] |
identifies exact types (public static member constant) |
[static] |
identifies types that represent a finite set of values (public static member constant) |