https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92214
Andrew Sutton <andrew.n.sutton at gmail dot com> changed: What |Removed |Added ---------------------------------------------------------------------------- CC| |andrew.n.sutton at gmail dot com --- Comment #1 from Andrew Sutton <andrew.n.sutton at gmail dot com> --- That's part of a functional type conversion: the T in T(args...), not a declaration. If we don't allow placeholders in that context, we can probably generate a better diagnostic.