std::numeric_limits<T>::is_specialized

std::numeric_limits<T>::is_specialized - cppreference.com

From cppreference.com

`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

#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:

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

Standard specializations

Example

See also