[Issue 21203] Accept pragma(mangle) on aggregate types

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21203

--- Comment #2 from Manu <turkeyman at gmail.com> ---
And I missed the most important one:

void fun(const(ScopedClass!MyClass)*);     // mangles const MyClass*

That's the money shot!

(I wish you could edit in bugzilla!!!)

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