Add a test from pr14898.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172283 91177308-0d34-0410-b5e6-96231b3b80d8
Only produce one -Wc++98-compat warning when initializing a reference from an init list with multiple elements.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172285 91177308-0d34-0410-b5e6-96231b3b80d8
Formatter: add a test for :? in []

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172289 91177308-0d34-0410-b5e6-96231b3b80d8
Provide Decl::getOwningModule(), which determines the (sub)module in
which a particular declaration resides. Use this information to
customize the "definition of 'blah' must be imported from another
module" diagnostic with the module the user actually has to
import. Additionally, recover by importing that module, so we don't
complain about other names in that module.

Still TODO: coming up with decent Fix-Its for these cases, and expand
this recovery approach for other name lookup failures.



git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172290 91177308-0d34-0410-b5e6-96231b3b80d8
Fix a regression from 171193: main cannot be overloaded.
Thanks Eli Friedman for noticing it.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@172292 91177308-0d34-0410-b5e6-96231b3b80d8