Re: [boost] Re: std::complex design (Was: N-Dimensional array library submission...)

From: Gabriel Dos Reis (Gabriel.Dos-Reis_at_[hidden])
Date: 2002-01-26 16:54:03

Beman Dawes <bdawes_at_[hidden]> writes:

| At 06:00 PM 1/10/2002, David Abrahams wrote:
| 
|  >> Regarding compatibility with existing C code:
|  >>   C does not have a complex type.
|  >
|  >C99 does, AFAIK.
| 
| Yes, C99 does.  It's in header <complex.h>.  Quite different from 
| C++.  Uses macros "complex" and "imaginary" for example.

Yes.  Something missing in C++ (at least, the last time I used C++
std::complex<> in my own programs) is a way to form lvalue expressions
to access std::complex<> components.  For example, to set the
imaginary part, one has to write something alon the lines

        z = std::complex<double>(z.real(), imag_part);

-- Gaby