swift234

Disallow 'var' specifier in for-in patterns

Don't allow a pattern like:

  for var x in sequence {
    ...
  }

and provide a removal fix-it for the 'var' keyword.

Additionally, for the following code:

  for let x in sequence {
    ...
  }

Provide a removal fix-it since the 'let' specifier is now
redundant.

rdar://problem/23172698

Swift SVN r32818