[PATCH] D38216: [C++17] Fix class template argument deduction for default constructors without an initializer

[Nicolas Lesser via Phabricator via cfe-commits]

Rakete1111 added a comment.

@lichray Isn't [dcl.type.auto.deduct] only for `auto` and `decltype(auto)`? Class template argument deduction is in [dcl.type.class.deduct], which doesn't seem to disallow declarations without an initializer.

About that `extern` business, yes that's indeed counter intuitive and weird. Couldn't find anything in the standard prohibiting this though, but I'm not so good at that either.


https://reviews.llvm.org/D38216