std::get(std::complex)

Since C++26

Header: <complex>

Returns the reference to real or imaginary part from a complex when I == 0 or I == 1, respectively. It is mainly provided for structured binding support.

# Declarations

template< std::size_t I >
friend constexpr T& get( std::complex<T>& x );

(since C++26)

template< std::size_t I >
friend constexpr const T& get( const std::complex<T>& x );

(since C++26)

template< std::size_t I >
friend constexpr T&& get( std::complex<T>&& x );

(since C++26)

template< std::size_t I >
friend constexpr const T&& get( const std::complex<T>&& x );

(since C++26)

# Parameters

# Notes

Feature-test macro Value Std Feature __cpp_lib_tuple_like 202311L (C++26) Add tuple protocol to std::complex

# Example

#include <complex>
 
static_assert([z = std::complex(1.0, 2.0)]
{
#if __cpp_lib_tuple_like >= 202311L
    return std::get<0>(z) == 1.0 and std::get<1>(z) == 2.0;
#else
    return z.real() == 1.0 and z.imag() == 2.0;
#endif
}());
 
int main() {}

# See also