# std::numeric_limits<T>::is_specialized

From cppreference.com
< cpp‎ | types‎ | numeric limits

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

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