Don't produce a 'returning reference to local' warning if a lambda returns a
reference (or pointer) to a variable from the closure object or from the
surrounding function scope.


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200494 91177308-0d34-0410-b5e6-96231b3b80d8
PR14995: Allow a dependent type as the second parameter of operator++ and
operator--, since it might instantiate as 'int' (or, if it's a pack, it
might instantiate as an empty pack).


git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200496 91177308-0d34-0410-b5e6-96231b3b80d8
Introduce Parser::completeExpression.

This function returns a list of completions for a given expression and
completion position.

Differential Revision: http://llvm-reviews.chandlerc.com/D2261

git-svn-id: https://llvm.org/svn/llvm-project/cfe/trunk@200497 91177308-0d34-0410-b5e6-96231b3b80d8