[Issue 24717] alias edge cases with tupleof

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=24717

--- Comment #11 from Manu <turkeyman at gmail.com> ---
Yeah it's fine, just alias a member of the type rather than the instance. 
You can typeof(instance) of you want to use instance as the point of reference.

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