swift234

Parser: Relax whitespace rules for ( and [.

Now that we enforce semicolon or newline separation between statements, we can relax the whitespace requirements on '(' and '[' tokens. A "following" token is now just a token that isn't at the start of a line, and any token can be a "starting" token. This allows for:

  a(b)
  a (b)
  a[b]
  a [b]

to parse as applications and subscripts, and:

  a
  (b)
  a
  [b]

to parse as an expr followed by a tuple or an expr followed by a container literal.

Swift SVN r4573