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From: "pinskia at gcc dot gnu.org" <gcc-bugzilla@gcc.gnu.org>
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Subject: [Bug c++/102928] Template argument deduction when mixing variadic
 template with C-style variadic function
Date: Sat, 06 Nov 2021 22:10:56 +0000
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https://gcc.gnu.org/bugzilla/show_bug.cgi?id=3D102928

Andrew Pinski <pinskia at gcc dot gnu.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
   Last reconfirmed|                            |2021-11-06
             Status|UNCONFIRMED                 |NEW
     Ever confirmed|0                           |1

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
temp.deduct.call

For a function parameter pack that occurs at the end of the
parameter-declaration-list,
deduction is performed for each remaining argument of the call, taking the =
type
P of the declarator-id of the
function parameter pack as the corresponding function template parameter ty=
pe.
Each deduction deduces
template arguments for subsequent positions in the template parameter packs
expanded by the function
parameter pack.


parameter-declaration-list does not include the ... variadic arguments part.

So Confirmed.

As far as I read in the standard, the template variadic deduction should be
greedy (deduction is performed for each remaining argument of the call).=