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Showing content from https://en.cppreference.com/w/cpp/language/../algorithm/../types/numeric_limits/is_exact.html below:

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

static const bool is_exact;

(until C++11)

static constexpr bool is_exact;

(since C++11)

The value of std::numeric_limits<T>::is_exact is true for all arithmetic types T that use exact representation.

[edit] Standard specializations T value of std::numeric_limits<T>::is_exact /* 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 false double false long double false [edit] Notes

While all fundamental types T for which std::numeric_limits<T>::is_exact == true are integer types, a library may define exact types that are not integers, e.g. a rational arithmetic type representing fractions.

[edit] See also identifies integer types
(public static member constant) [edit] identifies signed types
(public static member constant) [edit] identifies types that represent a finite set of values
(public static member constant) [edit]

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