std::complex<T> | ||
| (1) | ||
T real() const; | (until C++14) | |
constexpr T real() const; | (since C++14) | |
| (2) | ||
void real( T value ); | (until C++20) | |
constexpr void real( T value ); | (since C++20) | |
std::complex<float> | ||
| (1) | ||
float real() const; | (until C++11) | |
constexpr float real() const; | (since C++11) | |
| (2) | ||
void real( float value ); | (until C++20) | |
constexpr void real( float value ); | (since C++20) | |
std::complex<double> | ||
| (1) | ||
double real() const; | (until C++11) | |
constexpr double real() const; | (since C++11) | |
| (2) | ||
void real( double value ); | (until C++20) | |
constexpr void real( double value ); | (since C++20) | |
std::complex<long double> | ||
| (1) | ||
long double real() const; | (until C++11) | |
constexpr long double real() const; | (since C++11) | |
| (2) | ||
void real( long double value ); | (until C++20) | |
constexpr void real( long double value ); | (since C++20) |
Accesses the real part of the complex number.
value.| value | - | the value to set the real part to |
*this.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.
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 |
| returns the real part (function template) |
|
| accesses the imaginary part of the complex number (public member function) |
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