https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78754
--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
clang, ICC and GCC all accept it. ICC warns though:
<source>(4): warning #2922: template parameter "Ts" cannot be used because it
follows a parameter pack and cannot be deduced from the parameters of function
template "foo"
template<std::size_t ...Ns, typename ...Ts>
^
And MSVC errors out:
<source>(5): error C3547: template parameter 'Ts' cannot be used because it
follows a template parameter pack and cannot be deduced from the function
parameters of 'foo'
