JP005 20.7.4 p2 struct vs. class for variant_size

[jensmaurer]

Since the variant_size is a struct type, “class” in the following definition should be changed to “struct”.
template class variant_size<const T>;

Change “class” to “struct” as follows:
template struct variant_size<const T>;

JP7

[tkoeppe]

Final disposition: Accepted.