std::get(std::complex)
From cppreference.com
Defined in header <complex>
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template
<
std::size_t I >
friend constexpr T& get( std::complex <T> & x ) ; |
(1) | (since C++26) |
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template
<
std::size_t I >
friend constexpr const T& get( const std::complex <T> & x ) ; |
(2) | (since C++26) |
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template
<
std::size_t I >
friend constexpr T&& get( std::complex <T> && x ) ; |
(3) | (since C++26) |
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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
Parameters
| x | - | a complex
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Return value
1-4) A reference to the real or imaginary part from the stored one when I == 0 or I == 1
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 |
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(C++11)
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tuple accesses specified element (function template) |
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(C++11)
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accesses an element of a pair (function template) |
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(C++11)
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accesses an element of an array (function template) |