[Bug c++/108414] template meta programming

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108414

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

           What    |Removed                     |Added
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           Keywords|                            |c++-lambda, rejects-valid

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
> using nth_element_t = typename decltype([]<typename T>(const indexed<I, T>&){return std::type_identity<T>{};}(make_indexer<Ts...>()))::type;

There are some known issue with lambda inside a decltype which seems like might
be causing issues here ...