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Defined in header <concepts> | ||
template<class T> concept unsigned_integral=std::integral<T>&&!std::signed_integral<T>; | (since C++20) | |
The conceptunsigned_integral<T> is satisfied if and only ifT is an integral type andstd::is_signed_v<T> isfalse.
Contents |
unsigned_integral<T> may be satisfied by a type that is not anunsigned integer type, for example,bool.
#include <concepts>#include <iostream>#include <string_view> void test(std::signed_integralauto x,std::string_view text=""){std::cout<< text<<" ("+(text=="")<< x<<") is a signed integral\n";} void test(std::unsigned_integralauto x,std::string_view text=""){std::cout<< text<<" ("+(text=="")<< x<<") is an unsigned integral\n";} void test(auto x,std::string_view text=""){std::cout<< text<<" ("+(text=="")<< x<<") is non-integral\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("∫∫");// non-integral}
Possible output:
(42) is a signed integral0xFULL (15) is an unsigned integral(A) is a signed integraltrue (1) is an unsigned integral4e-2 (0.04) is non-integral(∫∫) is non-integral
(C++11) | checks if a type is an integral type (class template)[edit] |
(C++11) | checks if a type is a signed arithmetic type (class template)[edit] |
