swift234

Improve struct declarations to use their TypeAlias for the constructor results.  In the testcase we now get:
error: cannot convert initializer type 'CGPoint' to explicitly specified type 'int'
  var d : int = CGPoint(.y = 1, .x = 2);   // Using injected name.
                ^

instead of:
error: cannot convert initializer type 'oneof { CGPoint : (x : int, y : int)}' to explicitly specified type 'int'
  var d : int = CGPoint(.y = 1, .x = 2);   // Using injected name.
                ^


Swift SVN r298