NAME¶

std::signed_integral - std::signed_integral

Synopsis¶

Defined in header <concepts>
template < class T > (since C++20)
concept signed_integral = std::integral<T> && std::is_signed_v<T>;

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

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).

Example¶

// Run this code

#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: ∫∫∫

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)