Re: [PATCH 0/2] MR7748: ucrtbase: Add cexp() implementation.

[Piotr Caban (＠piotr)]

On Mon Apr  7 10:02:30 2025 +0000, Piotr Caban wrote:
> While this code does what you want it looks non portable / over
> complicated. At least __xy type should be changed to something like:
> #define __CMPLX(x, y, t, t2) \
>         ((union { t __z; t2 __xy[2]; }){.__xy = {(x),(y)}}.__z)
> #define CMPLX(x, y) __CMPLX(x, y, _Dcomplex, double)
>
> It could be simplified even further to:
> #define __CMPLX(x, y, t) ((t){(x), (y)})
>
> I'm afraid that none of this code is portable (at least it will not
> compile with MSVC).

It's probably best to define the macros using `_Cbuild` and `_FCbuild` functions:
```c
#define CMPLX(x, y)  _Cbuild(x, y)
```