it doesn't appear in places it shouldn't. The only limits on
this checking right now is the inadequacy of location information
for types, which is something we ought to fix.
Fix type-checking of byref applications. Fix IR generation
of byref variables. Whole lotta fixin' goin' on.
But hey, byref calls work.
Swift SVN r1111
A function argument clause is now one or more patterns (which
must be parenthesized and explicitly type all positions) not
separated by arrows; the first arrow then separates off the
return type.
Revisions to language reference forthcoming.
Swift SVN r1099
