Does D support middle endianness?

[Dom DiSc]

On Monday, 30 June 2025 at 04:21:16 UTC, H. S. Teoh wrote:
> On Mon, Jun 30, 2025 at 02:46:03AM +0000, Valentino Giudice via 
> Digitalmars-d wrote:
>> The only reference I found was this thread from 11 years ago: 
>> https://forum.dlang.org/post/mailman.1953.1380926372.1719.digitalmars-d@puremagic.com
>> 
>> I'd argue that if there aren't many middle endian 
>> architecture, it'd be worth not supporting them, in exchange 
>> for only having to deal with two byte orders (rather than all 
>> possible permutations), so the specification should mandate 
>> that either LittleEndian or BigEndian be set to true.
>
> What is a middle endian architecture?  First time I've heard of 
> it.

Yeah, sounds more like a late Aprils fool, born from the 
programming style to not put either of big- or little-endian at 
the else path but instead provide a third path with assert(0).
This style doesn't imply that such a third path really exist (as 
a useful case) but only provides a clear error path.