[Issue 17716] wrong result of IsExpression when not in static assert

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17716

--- Comment #3 from ag0aep6g <ag0aep6g at gmail.com> ---
(In reply to er.krali from comment #2)
> Furthermore, it doesn't work with ref parameters either:
[...]

You made the same comment on issue 17729, and it makes more sense there. I
guess you posted it here by accident?

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