[Issue 20007] Add the `__COUNTER__` special keyword

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=20007

--- Comment #2 from Dlang Bot <dlang-bot at dlang.rocks> ---
@Basile-z updated dlang/dmd pull request #10131 "fix issue 20007 - Add the
`__COUNTER__` primary expression" fixing this issue:

- fix issue 20007 - Add a new expression similar to the C `__COUNTER__` macro

https://github.com/dlang/dmd/pull/10131

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