[Bug c++/101344] braced-init-list not supported in an aggregate deduction

ppalka at gcc dot gnu.org gcc-bugzilla@gcc.gnu.org
Thu Aug 12 15:20:58 GMT 2021


https://gcc.gnu.org/bugzilla/show_bug.cgi?id=101344

Patrick Palka <ppalka at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Assignee|unassigned at gcc dot gnu.org      |ppalka at gcc dot gnu.org
                 CC|                            |ppalka at gcc dot gnu.org
           See Also|                            |https://gcc.gnu.org/bugzill
                   |                            |a/show_bug.cgi?id=101803
             Status|NEW                         |ASSIGNED

--- Comment #2 from Patrick Palka <ppalka at gcc dot gnu.org> ---
Another rejects-valid example (I think):

template<class T=void>
struct C { int m; int t[2]; };

C b{1, {2, 3}};

The relevant wording seems to be
https://eel.is/c++draft/over.match.class.deduct#1.5.  Rather than only
"considering" brace elision for int[2] (and other non-dependent aggregate
type), we seem to require it.


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