is vs ==

[IchorDev]

On Saturday, 30 August 2025 at 22:15:26 UTC, Brother Bill wrote:
> Do the Style Guidelines or other authorities prefer one to the 
> other for modern D coding?

No: https://dlang.org/dstyle.html

> For the modern D developer, which is the more preferred choice, 
> to use 'is' or '=='?

This question doesn't make much sense. It's like if you asked the 
same thing about delegates vs functions.
`is` tells you if its operands are exact bit-for-bit matches, 
whereas `==` usually compares the contents of two things and may 
be overloaded using `opCmp` or `opEquals`.
For clarity's sake, `is` should generally be used for pointer 
comparison.