swift234

Code completion: provide results for initializers after the left paren:

  class A {
    init(a: Int) {}
  }
  A(#^HERE^#

In its current state, this is a hack that I am not proud of.  There is
potential here to provide such completions for all function calls:

  class A {
    func foo(a: Int) {}
    func foo(a: Double) {}
  }
  A().foo(#^HERE^#

but this requires code completion doing its own name lookup, since the type
checker will give us an error type due to ambiguity of overloaded functions.

Type checker also sometimes gives up in cases like these:

  struct A {
    func foo() {}
  }
  A().foo

which is understandable, since we disallow partial applications of functions on
values, but returning the correct type here is useful for code completion.

rdar://16597372


Swift SVN r16367