(v) is actually (*&v) since when?

Question

Could C++ standards gurus please enlighten me:

Since which C++ standard version has this statement failed because (v) seems to be equivalent to (*&

Answer 1

If you look at the revision summary of the latest C++1z draft, you'd see this in [diff.cpp14.dcl.dcl]

[dcl.stc]
Change: Removal of register storage-class-specifier.
Rationale: Enable repurposing of deprecated keyword in future revisions of this International Standard.
Effect on original feature: A valid C++ 2014 declaration utilizing the register storage-class-specifier is ill-formed in this International Standard. The specifier can simply be removed to retain the original meaning.

The warning may be due to that.