[Issue 10326] Disallow 'invariant' for immutable, allow class/struct invariants without (), and later disallow usage of ()

[via Digitalmars-d-bugs]

https://issues.dlang.org/show_bug.cgi?id=10326

--- Comment #13 from bearophile_hugs at eml.cc ---
(In reply to Kenji Hara from comment #9)

> Instead of that, how about to accept both invariant(){...}  and
> unittest(){...} ?

I prefer to disallow () in both.

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