std::floating_point
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Concepts library
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floating_point
(C++20)
(C++20)(C++20)
(C++20)
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(C++20)(C++20)
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(C++20)
Exposition-only concepts
(C++20)
Defined in header
<concepts>
template< class T >
concept floating_point = std::is_floating_point_v <T>;
(since C++20)
concept floating_point = std::is_floating_point_v <T>;
The concept floating_point<T> is satisfied if and only if T is a floating-point type.
[edit] Example
Run this code
#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:
2.2 4.4 888
[edit] References
- C++23 standard (ISO/IEC 14882:2024):
- 18.4.7 Arithmetic concepts [concepts.arithmetic]
- C++20 standard (ISO/IEC 14882:2020):
- 18.4.7 Arithmetic concepts [concepts.arithmetic]