[Bug libstdc++/96416] address_of() is broken by static_assert in pointer_traits

[dangelog at gmail dot com via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96416

Giuseppe D'Angelo <dangelog at gmail dot com> changed:

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                 CC|                            |dangelog at gmail dot com

--- Comment #9 from Giuseppe D'Angelo <dangelog at gmail dot com> ---
Hi,

Stumbled across this indeed when trying to use contiguous iterators.

Sure enough, pointer_traits for them is ill-formed. But then I don't understand
why the "otherwise to_­address(p.operator->())" part is in the Standard at all,
if it can never be used.

Has this been raised as a library defect?

And are you recommending that everyone who defines their custom contiguous
iterators specializes pointer_traits for them? Call it _quite_ annoying...