[ 2020-05-01; Daniel comments ]

It should be pointed out that the originally referred to Value: element has since then be renamed to Type: but the reported problem (its lack of definition) still exists in N4861.

[ 2018-11 Reflector prioritization ]

Set Priority to 3

In N4778, [pair.astuple], [variant.helper], and [array.tuple], are partly specified via a fictitious descriptive element Value: Moreover, [span.tuple] is on track to do likewise in the near future.

Let's invent such a Value: element and properly document it within [structure.specifications], or else let's respecify the offending uses.