std::unsigned_integral(3) C++ Standard Libary std::unsigned_integral(3) NAME std::unsigned_integral - std::unsigned_integral Synopsis Defined in header <concepts> template< class T > concept unsigned_integral = std::integral<T> && (since C++20) !std::signed_integral<T>; The concept unsigned_integral<T> is satisfied if and only if T is an in- tegral type and std::is_signed_v<T> is false. Notes unsigned_integral<T> may be satisfied by a type that is not an unsigned integer type, for example, bool. Example // Run this code #include <concepts> #include <iostream> #include <string_view> void test(std::signed_integral auto x, std::string_view text = "") { std::cout << text << " (" + (text == "") << x << ") is a signed inte- gral\n"; } void test(std::unsigned_integral auto x, std::string_view text = "") { std::cout << text << " (" + (text == "") << x << ") is an unsigned in- tegral\n"; } void test(auto x, std::string_view text = "") { std::cout << text << " (" + (text == "") << x << ") is non-inte- gral\n"; } int main() { test(42); // signed test(0xFULL, "0xFULL"); // unsigned test('A'); // platform-dependent test(true, "true"); // unsigned test(4e-2, "4e-2"); // non-integral (hex-float) test("a<<a<<"); // non-integral } Possible output: (42) is a signed integral 0xFULL (15) is an unsigned integral (A) is a signed integral true (1) is an unsigned integral 4e-2 (0.04) is non-integral (a<<a<<) is non-integral See also is_integral checks if a type is an integral type (C++11) (class template) is_signed checks if a type is a signed arithmetic type (C++11) (class template) http://cppreference.com 2024.06.10 std::unsigned_integral(3)
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