std::numeric_limits<T>:: is_bounded

From cppreference.com
Utilities library
General utilities
Relational operators (deprecated in C++20)
static const bool is_bounded ;
(until C++11)
static constexpr bool is_bounded ;
(since C++11)

The value of std:: numeric_limits < T > :: is_bounded is true for all arithmetic types T that represent a finite set of values. While all fundamental types are bounded, this constant would be false in a specialization of std::numeric_limits for a library-provided arbitrary precision arithmetic type.

Standard specializations

T value of std:: numeric_limits < T > :: is_bounded
/* non-specialized */ false
bool true
char true
signed char true
unsigned char true
wchar_t true
char8_t (since C++20) true
char16_t (since C++11) true
char32_t (since C++11) true
short true
unsigned short true
int true
unsigned int true
long true
unsigned long true
long long (since C++11) true
unsigned long long (since C++11) true
float true
double true
long double true

See also

[static]
identifies integer types
(public static member constant)
[static]
identifies signed types
(public static member constant)
[static]
identifies exact types
(public static member constant)