auto merge of #14250 : alexcrichton/rust/gc, r=brson

This commit removes `@T` from the compiler by moving the AST to using `Gc<T>`. This also starts treating `Gc<T>` as `@T` in the same way that `Box<T>` is the same as `~T` in the compiler.

After this hits a snapshot, the `@T` syntax should be able to be removed completely.

diff --git a/src/libstd/prelude.rs b/src/libstd/prelude.rs
index 485c2140a8d1b035f8b2271a8dba3f4394ff6517..eb862ecf932901c72046ca5641f6aaa52e5f885b 100644 (file)
--- a/src/libstd/prelude.rs
+++ b/src/libstd/prelude.rs
@@ -66,7 +66,7 @@
 #[doc(no_inline)] pub use iter::{Iterator, DoubleEndedIterator};
 #[doc(no_inline)] pub use iter::{RandomAccessIterator, CloneableIterator};
 #[doc(no_inline)] pub use iter::{OrdIterator, MutableDoubleEndedIterator};
-#[doc(no_inline)] pub use num::{Num, NumCast, CheckedAdd, CheckedSub, CheckedMul};
+#[doc(no_inline)] pub use num::{Num, NumCast, CheckedAdd, CheckedSub, CheckedMul, CheckedDiv};
 #[doc(no_inline)] pub use num::{Signed, Unsigned, Primitive, Int, Float};
 #[doc(no_inline)] pub use num::{FloatMath, ToPrimitive, FromPrimitive};
 #[doc(no_inline)] pub use owned::Box;