Patrick Walton a63003fe1a librustc: Parse, but do not fully turn on, the ref keyword for
by-reference upvars.

This partially implements RFC 38. A snapshot will be needed to turn this
on, because stage0 cannot yet parse the keyword.

Part of #12381.
2014-08-13 18:09:14 -07:00
..
2014-08-06 01:31:48 -04:00
2014-07-11 15:26:26 -07:00