[Issue 21011] Variant and tuples by index

[d-bugmail at puremagic.com]

https://issues.dlang.org/show_bug.cgi?id=21011

--- Comment #2 from superDIMMaX <v.leolui at gmail.com> ---
And i confused. why this not working with any [] opIndex API and(or) why not
add tuples support? Variant know type Tuple!(int,int) and tuples have linear
layout - union{Tuple!(int,int) t; int[2] a} work fine

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