Instantiate exception specifications when instantiating function types (other
than the type of a function declaration). We previously didn't instantiate
these at all! This also covers the pathological case where the only mention of
a parameter pack is within the exception specification; this gives us a second
way (other than alias templates) to reach the horrible state where a type
contains an unexpanded pack, but its canonical type does not.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217995 91177308-0d34-0410-b5e6-96231b3b80d8
Fix test case.

This is a follow-up to r217994.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217996 91177308-0d34-0410-b5e6-96231b3b80d8
Skip parens when detecting whether we're instantiating a function declaration.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@217997 91177308-0d34-0410-b5e6-96231b3b80d8
Fix test case.

This is another follow-up patch to r217996.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218003 91177308-0d34-0410-b5e6-96231b3b80d8
Sema: Diagnose undefined structs used as Microsoft anonymous structs

Previously, we would not mark structs containing anonymous structs as
invalid.  Later, horrific things would occur when trying to determine
the size of the parent record.

Instead, require the struct to be a complete type when used as an
anonymous struct.  Mark both the anonymous field for the struct and the
parent context as invalid (this is similar to what we do when a struct
contains a field with an incomplete type.)

This fixes PR11847.

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@218006 91177308-0d34-0410-b5e6-96231b3b80d8