[clang] template argument deduction for template classes

Hey everyone,

I was wondering if the template argument deduction for template classes

that currently has SVN status will be included in llvm 4.0.1.

Currently clang 4.0.0 is incompatible with the stdlib of gcc-7.1.0

released a week ago (e.g. due to gcc-7.1.0/include/c++/7.1.0/optional:1032 ).

Best,

Nils Wentzell