NAME¶

std::numeric_limits::is_specialized - std::numeric_limits::is_specialized

Synopsis¶

static const bool is_specialized; (until C++11)
static constexpr bool is_specialized; (since C++11)

The value of std::numeric_limits<T>::is_specialized is true for all T for which
there exists a specialization of std::numeric_limits.

Standard specializations¶

T value of std::numeric_limits<T>::is_specialized
/* 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

Example¶

// Run this code

#include <iostream>
#include <limits>
#include <type_traits>

int main()
{
enum E{};

std::cout << std::boolalpha
<< std::numeric_limits<bool>::is_specialized << '\n'
<< std::numeric_limits<long long>::is_specialized << '\n'
<< std::numeric_limits<std::true_type>::is_specialized << '\n'
<< std::numeric_limits<E>::is_specialized << '\n';
}

Possible output:¶

true
true
false
false

See also¶

is_integer identifies integer types
[static] (public static member constant)
is_iec559 identifies the IEC 559/IEEE 754 floating-point types
[static] (public static member constant)
is_exact identifies exact types
[static] (public static member constant)
is_bounded identifies types that represent a finite set of values
[static] (public static member constant)