https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69736
--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> --- In some contexts yes, but 5.1.1 [expr.prim.general] p6 says: A parenthesized expression is a primary expression whose type and value are identical to those of the enclosed expression. The presence of parentheses does not affect whether the expression is an lvalue. The parenthesized expression can be used in exactly the same contexts as those where the enclosed expression can be used, and with the same meaning, except as otherwise indicated. I don't see anything indicating otherwise in [conf.func] or [expr.call] or [dcl.fct.default].
