884d0e031a
As core uses an extern type (`ptr::VTable`), the default `?Sized` to `MetaSized` migration isn't sufficient, and some code that previously accepted `VTable` needs relaxed to continue to accept extern types. Similarly, the compiler uses many extern types in `rustc_codegen_llvm` and in the `rustc_middle::ty::List` implementation (`OpaqueListContents`) some bounds must be relaxed to continue to accept these types. Unfortunately, due to the current inability to relax `Deref::Target`, some of the bounds in the standard library are forced to be stricter than they ideally would be.
47 lines
1.5 KiB
Rust
47 lines
1.5 KiB
Rust
//! Support code for encoding and decoding types.
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// tidy-alphabetical-start
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#![allow(internal_features)]
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#![allow(rustc::internal)]
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#![cfg_attr(not(bootstrap), feature(sized_hierarchy))]
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#![cfg_attr(test, feature(test))]
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#![doc(
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html_root_url = "https://doc.rust-lang.org/nightly/nightly-rustc/",
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html_playground_url = "https://play.rust-lang.org/",
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test(attr(allow(unused_variables), deny(warnings)))
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)]
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#![doc(rust_logo)]
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#![feature(core_intrinsics)]
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#![feature(min_specialization)]
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#![feature(never_type)]
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#![feature(rustdoc_internals)]
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// tidy-alphabetical-end
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// Allows macros to refer to this crate as `::rustc_serialize`.
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#[cfg(test)]
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extern crate self as rustc_serialize;
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pub use self::serialize::{Decodable, Decoder, Encodable, Encoder};
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mod serialize;
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pub mod int_overflow;
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pub mod leb128;
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pub mod opaque;
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// This has nothing to do with `rustc_serialize` but it is convenient to define it in one place
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// for the rest of the compiler so that `cfg(bootstrap)` doesn't need to be littered throughout
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// the compiler wherever `PointeeSized` would be used. `rustc_serialize` happens to be the deepest
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// crate in the crate graph which uses `PointeeSized`.
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//
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// When bootstrap bumps, remove both the `cfg(not(bootstrap))` and `cfg(bootstrap)` lines below
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// and just import `std::marker::PointeeSized` whereever this item was used.
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#[cfg(not(bootstrap))]
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pub use std::marker::PointeeSized;
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#[cfg(bootstrap)]
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pub trait PointeeSized {}
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#[cfg(bootstrap)]
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impl<T: ?Sized> PointeeSized for T {}
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