real.hpp

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// SPDX-License-Identifier: BSL-1.0
 
#ifndef TETL_COMPLEX_REAL_HPP
#define TETL_COMPLEX_REAL_HPP
 
#include <etl/_complex/complex.hpp>
#include <etl/_concepts/floating_point.hpp>
#include <etl/_concepts/integral.hpp>
 
namespace etl {

template <typename T>
[[nodiscard]] constexpr auto real(complex<T> const& z) noexcept(noexcept(z.real())) -> T
{
    return z.real();
}

template <floating_point Float>
[[nodiscard]] constexpr auto real(Float f) noexcept -> Float
{
    return f;
}

template <integral Integer>
[[nodiscard]] constexpr auto real(Integer i) noexcept -> double
{
    return static_cast<double>(i);
}
 
} // namespace etl
 
#endif // TETL_COMPLEX_REAL_HPP