swift234

Constructor selectors always start with 'init'.

Implement the new rules for mapping between selector names and
constructors. The selector for a given constructor is formed by
looking at the names of the constructor parameters:
  * For the first parameter, prepend "init" to the parameter name and
  uppercase the first letter of the parameter name. Append ':' if
  there are > 1 parameters or the parameter has non-empty-tuple type.
  * For the remaining parameters, the name of each parameter followed
  by ':'.

When a parameter doesn't exist, assume that the parameter name is the
empty string.

And, because I failed to commit it separately, support selector-style
declarations of constructor parameters so that we can actually write
constructors nicely, e.g.:

  // selector is initWithFoo:bar:
  constructor withFoo(foo : Foo) bar(bar : Bar) { ... }



Swift SVN r8361