swift234

Introduce a new kind of sugar, ParenType.  A tuple with one
anonymous member is actually one of these.

A func decl is curried over all of its parameter clauses,
as long as they're written without parentheses.  So the body
of a func is the body of the "most curried" function:
  func foo(x:int) -> (y:int) -> int {
    // This is the body of the function that takes 'y'.
    // It returns an int.
  }
  func bar(x:int) -> ((y:int) -> int) {
    // This is the body of the function that takes 'x'.
    // It returns a functon of type (y:int) -> int.
  }



Swift SVN r993