swift234

If a type binding to an [auto_closure] function type fails, attempt to
bind to the result type of that function type. The astute reader will
note that this is a conversion constraint rather than a subtyping
constraint, but that is intentional: we need to be able to consider
conversion constraints. Later, we can track the initial constraint on
which we're basing our assumptions, so we don't generate weaken via
conversion when in fact we're only allowed to perform subtyping (for
example).


Swift SVN r2745