std:: get (std::complex)
From cppreference.com
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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.
Parameters
| x | - |
a
complex
|
Return value
1-4)
A reference to the real or imaginary part from the stored one when
I
==
0
or
I
==
1
, respectively.
Notes
| Feature-test macro | Value | Std | Feature |
|---|---|---|---|
__cpp_lib_tuple_like
|
202311L | (C++26) | Add tuple protocol to std::complex |
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() {}
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) |