std::get(std::complex)
From cppreference.com
| Defined in header <complex>
|
||
| template< std::size_t I > friend constexpr T& get( std::complex<T>& x ); |
(1) | (since C++26) |
| template< std::size_t I > friend constexpr const T& get( const std::complex<T>& x ); |
(2) | (since C++26) |
| template< std::size_t I > friend constexpr T&& get( std::complex<T>&& x ); |
(3) | (since C++26) |
| template< std::size_t I > friend constexpr const T&& get( const std::complex<T>&& x ); |
(4) | (since C++26) |
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.
Contents |
[edit] Parameters
| x | - | a complex
|
[edit] Return value
1-4) A reference to the real or imaginary part from the stored one when I == 0 or I == 1, respectively.
[edit] Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_tuple_like |
202311L |
(C++26) | Add tuple protocol to std::complex |
[edit] Example
Run this code
#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() {}
[edit] See also
| Structured binding (C++17) | binds the specified names to sub-objects or tuple elements of the initializer |
| (C++11) |
tuple accesses specified element (function template) |
| (C++11) |
accesses an element of a pair (function template) |
| (C++11) |
accesses an element of an array (function template) |
