home | help 
std::complex::real(3)	       C++ Standard Libary	   std::complex::real(3)

NAME
     std::complex::real - std::complex::real

Synopsis
	primary template
	std::complex<T>
	T real() const; 	     (until
				     C++14)
	constexpr T real()	     (since
	const;			     C++14)
	void real( T value		    (until
	);				    C++20)
	constexpr void real(		    (since
	T value );			    C++20)
	specialization
	std::complex<float>
	float real() const;			   (until
						   C++11)
	constexpr float 			   (since
	real() const;				   C++11)
	void real( float				  (until
	value );					  C++20)
	constexpr void real(				  (since
	float value );					  C++20)
	specialization
	std::complex<double> (1)
	double real() const;					 (until
				 (2)				 C++11)
	constexpr double					 (since
	real() const;						 C++11)
	void real( double	     (1)				(until
	value );							C++20)
	constexpr void real(		    (2) 			(since
	double value ); 						C++20)
	specialization
	std::complex<long			   (1)
	double>
	long	    double	 real() 				     (2)
     (until
	const;
     C++11)
	constexpr							    long
     (since
	double	   real()     const;					     (1)
     C++11)
	void				 real(				    long
     (until
	double	 value	 );						     (2)
     C++20)
	constexpr			    void			   real(
     (since
	long		       double		       value		      );
     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 speci-
     fied 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 retroac-
     tively to
	previously published C++ standards.

	  DR	Applied to     Behavior as published		    Correct  be-
     havior
	LWG  387  C++98       the real part could not be set can be set directly
     via a new real
			   directly			  overload

See also
	real returns the real part
	     (function template)
	imag accesses the imaginary part of the complex number
	     (public member function)

http://cppreference.com 	   2024.06.10		   std::complex::real(3)
home | help