std::numeri...::is_integer(3) C++ Standard Libary std::numeri...::is_integer(3) NAME std::numeric_limits::is_integer - std::numeric_limits::is_integer Synopsis static const bool is_integer; (until C++11) static constexpr bool is_integer; (since C++11) The value of std::numeric_limits<T>::is_integer is true for all integer arithmetic types T and false otherwise. This constant is meaningful for all spe- cializations. Standard specializations T value of std::numeric_limits<T>::is_in- teger /* 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 Example // Run this code #include <cstddef> #include <cstdint> #include <limits> static_assert ( std::numeric_limits<bool>::is_integer && std::numeric_limits<std::size_t>::is_integer && std::numeric_limits<std::int32_t>::is_integer && std::numeric_limits<std::int64_t>::is_integer && std::numeric_limits<decltype(42)>::is_integer && !std::numeric_limits<int*>::is_integer && !std::numeric_limits<float>::is_integer && !std::numeric_limits<double>::is_integer && !std::numeric_limits<long double>::is_integer && !std::numeric_limits<decltype([](){})>::is_integer // P0315R4 ); int main() {} See also is_integral checks if a type is an integral type (C++11) (class template) is_signed identifies signed 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) http://cppreference.com 2024.06.10 std::numeri...::is_integer(3)
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