The concept floating_point<T> is satisfied if and only if T is a floating-point type.
#include <concepts>
#include <iostream>
#include <type_traits>
constexpr std::floating_point auto x2(std::floating_point auto x)
{
return x + x;
}
constexpr std::integral auto x2(std::integral auto x)
{
return x << 1;
}
int main()
{
constexpr auto d = x2(1.1);
static_assert(std::is_same_v<double const, decltype(d)>);
std::cout << d << '\n';
constexpr auto f = x2(2.2f);
static_assert(std::is_same_v<float const, decltype(f)>);
std::cout << f << '\n';
constexpr auto i = x2(444);
static_assert(std::is_same_v<int const, decltype(i)>);
std::cout << i << '\n';
}
Output:
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