Defined in header <concepts> | ||
|---|---|---|
template < class T > concept signed_integral = std::integral<T> && std::is_signed_v<T>; | (since C++20) |
The concept signed_integral<T> is satisfied if and only if T is an integral type and std::is_signed_v<T> is true.
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).
#include <concepts>
#include <iostream>
void print(std::signed_integral auto i) {
std::cout << "Signed integral: " << i << '\n';
}
void print(std::unsigned_integral auto u) {
std::cout << "Unsigned integral: " << u << '\n';
}
void print(auto x) {
std::cout << "Non-integral: " << x << '\n';
}
int main() {
print(42); // signed
print(0xFull); // unsigned
print(true); // unsigned
print('A'); // platform-dependent
print(4e-2); // non-integral (hex-float)
print("∫∫∫"); // non-integral
}Possible output:
Signed integral: 42 Unsigned integral: 15 Unsigned integral: 1 Signed integral: A Non-integral: 0.04 Non-integral: ∫∫∫
|
(C++11) | checks if a type is an integral type (class template) |
|
(C++11) | checks if a type is a signed arithmetic type (class template) |
© cppreference.com
Licensed under the Creative Commons Attribution-ShareAlike Unported License v3.0.
https://en.cppreference.com/w/cpp/concepts/signed_integral