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 16:40:55

"Ralf W. Grosse-Kunstleve" <rwgk_at_[hidden]> writes:

[...]

| Regarding compatibility with existing C code:
|   C does not have a complex type.

More precisely, C89 didn't have a complex type.  C99 on the other hand
has introduced a _Complex T.

[...]

| Regarding compatibility with existing FORTRAN code:
|   AFAIK FORTRAN COMPLEX are by definition stored as
|   consecutive real values, real part first, imaginary
|   part second.

Same in C99.

[...]

| My proposal is compatible with all existing implementations
| of std::complex that I know about, but formalizes
| assumptions that are commonly made in practice (this should
| include the assumption that the complex value is internally
| represented as a real and an imaginary part, as opposed to,
| e.g. an amplitude and an angle).

An ISO C++ conforming std::complex<> implementation cannot store
complex in (magnitude, phase) format.

-- Gaby