std::signed_integral - cppreference.com (original) (raw)

The concept signed_integral<T> is satisfied if and only if T is an integral type and std::is_signed_v<T> is true.

[edit] Notes

signed_integral<T> may be satisfied by a type that is not a signed integer type, for example, char (on a system where char is signed).

[edit] Example

#include #include #include   void test(std::signed_integral auto x, std::string_view text = "") { std::cout << text << " (" + (text == "") << x << ") is a signed integral\n"; }   void test(std::unsigned_integral auto 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 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 (∫∫) is non-integral

[edit] References

[edit] See also

| | checks if a type is an integral type (class template) [edit] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- | | | checks if a type is a signed arithmetic type (class template) [edit] |