std::complex<T>::real - cppreference.com
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| primary template |
||
T real() const; |
(1) | (until C++14) |
constexpr T real() const; |
(since C++14) | |
void real( T value ); |
(2) | (until C++20) |
constexpr void real( T value ); |
(since C++20) | |
| specialization |
||
float real() const; |
(1) | (until C++11) |
constexpr float real() const; |
(since C++11) | |
void real( float value ); |
(2) | (until C++20) |
constexpr void real( float value ); |
(since C++20) | |
| specialization |
||
double real() const; |
(1) | (until C++11) |
constexpr double real() const; |
(since C++11) | |
void real( double value ); |
(2) | (until C++20) |
constexpr void real( double value ); |
(since C++20) | |
| specialization |
||
long double real() const; |
(1) | (until C++11) |
constexpr long double real() const; |
(since C++11) | |
void real( long double value ); |
(2) | (until C++20) |
constexpr void real( long double value ); |
(since C++20) | |
Accesses the real part of the complex number.
1) Returns the real part.
2) Sets the real part to value.
Parameters
| value | - | the value to set the real part to |
Return value
1) The real part of *this.
2) (none)
Notes
In C++11, overload (1) in std::complex specializations used to be specified without const qualifier. However, in C++11, a constexpr specifier used in a non-static member function implies const, and thus the behavior is as if const is specified.
Defect reports
The following behavior-changing defect reports were applied retroactively to previously published C++ standards.
| DR | Applied to | Behavior as published | Correct behavior |
|---|---|---|---|
| LWG 387 | C++98 | the real part could not be set directly | can be set directly via a new real overload
|
See also
| returns the real part (function template) [edit] | |
| accesses the imaginary part of the complex number (public member function) [edit] |