default initialization of char arrays

[Dennis]

On Monday, 8 September 2025 at 15:42:27 UTC, Walter Bright wrote:
> He asked how to default initialize it to 0 without having to 
> tediously enumerate the 0 for each element in the initializer.

That is not what the email exchange was about. Last DConf you 
claimed (paraphrased):

'Default initializing chars to 255 (and floats to nan) in D 
prevents bugs and makes the programmer's intent clearer.'

I shared an experience of the opposite, where this C code from 
Mingw:

```C
OSVERSIONINFOEXW vi = 
{sizeof(vi),0,0,0,0,{0},0,0,0,VER_NT_WORKSTATION};
```

Got incorrectly translated to this in druntime:

```D
OSVERSIONINFOEXW osvi = { OSVERSIONINFOEXW.sizeof, 0, 0, 0, 0, 
[0], 0, 0, 0, VER_NT_WORKSTATION };
```

https://github.com/mingw-w64/mingw-w64/blob/849a151baf187f32eb57b34c00365cbc7d2353a7/mingw-w64-headers/include/versionhelpers.h#L82C5-L82C77

https://github.com/dlang/dmd/blob/dd2a35af794efb1eb72864f7aafbcd0f551e75ca/druntime/src/core/sys/windows/winver.d#L259

Before finding the C code, it was unclear to me what the 
intention was of `[0]`: is it meant to initialize to `[0, 255, 
255, ...]` or `[0, 0, 0, ...]`? I turns out it was supposed to be 
the latter, but because of D's non-zero default initialization 
the compiler did the former.

Either way, cases like this will be prevented in the future by 
https://github.com/dlang/dmd/pull/21821