[Issue 17239] template this in typeof expressions

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=17239

--- Comment #3 from Nick Treleaven <nick at geany.org> ---
> As c is a template, the type is supposed to be void

This got added to the spec fairly recently:

> If the expression is a Template, typeof gives the type void.

https://dlang.org/spec/type.html#typeof

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