rust - https://github.com/rust-lang/rust

Age	Commit message (Collapse)	Author	Lines
2011-11-16	rustc: Accept 'const' as synonym for 'mutable?'	Brian Anderson	-1/+1

2011-10-18	Immutable and mutable? are covariant on their inner types	Brian Anderson	-0/+13
	Whereas [mutable T] is invariant with respect to T, [T] and [mutable? T] are covariant with respect to T.