mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-04 03:07:25 +00:00
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.
62 lines
1.4 KiB
Rust
62 lines
1.4 KiB
Rust
// See rsbegin.rs for details.
|
|
|
|
#![feature(no_core)]
|
|
#![feature(lang_items)]
|
|
#![feature(auto_traits)]
|
|
#![crate_type = "rlib"]
|
|
#![no_core]
|
|
#![allow(internal_features)]
|
|
#![warn(unreachable_pub)]
|
|
|
|
#[cfg(not(bootstrap))]
|
|
#[lang = "pointee_sized"]
|
|
pub trait PointeeSized {}
|
|
|
|
#[cfg(not(bootstrap))]
|
|
#[lang = "meta_sized"]
|
|
pub trait MetaSized: PointeeSized {}
|
|
|
|
#[cfg(bootstrap)]
|
|
#[lang = "sized"]
|
|
pub trait Sized {}
|
|
#[cfg(not(bootstrap))]
|
|
#[lang = "sized"]
|
|
pub trait Sized: MetaSized {}
|
|
|
|
#[lang = "sync"]
|
|
trait Sync {}
|
|
impl<T> Sync for T {}
|
|
#[lang = "copy"]
|
|
trait Copy {}
|
|
#[lang = "freeze"]
|
|
auto trait Freeze {}
|
|
|
|
#[cfg(bootstrap)]
|
|
impl<T: ?Sized> Copy for *mut T {}
|
|
#[cfg(not(bootstrap))]
|
|
impl<T: PointeeSized> Copy for *mut T {}
|
|
|
|
#[cfg(bootstrap)]
|
|
#[lang = "drop_in_place"]
|
|
#[inline]
|
|
#[allow(unconditional_recursion)]
|
|
pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
|
|
drop_in_place(to_drop);
|
|
}
|
|
#[cfg(not(bootstrap))]
|
|
#[lang = "drop_in_place"]
|
|
#[inline]
|
|
#[allow(unconditional_recursion)]
|
|
pub unsafe fn drop_in_place<T: PointeeSized>(to_drop: *mut T) {
|
|
drop_in_place(to_drop);
|
|
}
|
|
|
|
#[cfg(all(target_os = "windows", target_arch = "x86", target_env = "gnu"))]
|
|
pub mod eh_frames {
|
|
// Terminate the frame unwind info section with a 0 as a sentinel;
|
|
// this would be the 'length' field in a real FDE.
|
|
#[no_mangle]
|
|
#[unsafe(link_section = ".eh_frame")]
|
|
pub static __EH_FRAME_END__: u32 = 0;
|
|
}
|