diff options
Diffstat (limited to 'compiler/rustc_serialize/src/lib.rs')
| -rw-r--r-- | compiler/rustc_serialize/src/lib.rs | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/compiler/rustc_serialize/src/lib.rs b/compiler/rustc_serialize/src/lib.rs index 34be35e36ac..656ecfcab36 100644 --- a/compiler/rustc_serialize/src/lib.rs +++ b/compiler/rustc_serialize/src/lib.rs @@ -3,6 +3,7 @@ // tidy-alphabetical-start #![allow(internal_features)] #![allow(rustc::internal)] +#![cfg_attr(not(bootstrap), feature(sized_hierarchy))] #![cfg_attr(test, feature(test))] #![doc( html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/", @@ -27,3 +28,19 @@ mod serialize; pub mod int_overflow; pub mod leb128; pub mod opaque; + +// This has nothing to do with `rustc_serialize` but it is convenient to define it in one place +// for the rest of the compiler so that `cfg(bootstrap)` doesn't need to be littered throughout +// the compiler wherever `PointeeSized` would be used. `rustc_serialize` happens to be the deepest +// crate in the crate graph which uses `PointeeSized`. +// +// When bootstrap bumps, remove both the `cfg(not(bootstrap))` and `cfg(bootstrap)` lines below +// and just import `std::marker::PointeeSized` whereever this item was used. + +#[cfg(not(bootstrap))] +pub use std::marker::PointeeSized; + +#[cfg(bootstrap)] +pub trait PointeeSized {} +#[cfg(bootstrap)] +impl<T: ?Sized> PointeeSized for T {} |