mirror of
https://github.com/rust-lang/rust.git
synced 2025-10-30 20:44:34 +00:00
53 lines
1.7 KiB
Rust
53 lines
1.7 KiB
Rust
// tidy-alphabetical-start
|
|
#![cfg_attr(all(feature = "nightly", test), feature(stmt_expr_attributes))]
|
|
#![cfg_attr(feature = "nightly", allow(internal_features))]
|
|
#![cfg_attr(feature = "nightly", feature(extend_one, step_trait, test))]
|
|
#![cfg_attr(feature = "nightly", feature(new_range_api))]
|
|
#![cfg_attr(feature = "nightly", feature(new_zeroed_alloc))]
|
|
// tidy-alphabetical-end
|
|
|
|
pub mod bit_set;
|
|
#[cfg(feature = "nightly")]
|
|
pub mod interval;
|
|
|
|
mod idx;
|
|
mod slice;
|
|
mod vec;
|
|
|
|
pub use idx::{Idx, IntoSliceIdx};
|
|
pub use rustc_index_macros::newtype_index;
|
|
pub use slice::IndexSlice;
|
|
#[doc(no_inline)]
|
|
pub use vec::IndexVec;
|
|
|
|
/// Type size assertion. The first argument is a type and the second argument is its expected size.
|
|
///
|
|
/// <div class="warning">
|
|
///
|
|
/// Emitting hard errors from size assertions like this is generally not
|
|
/// recommended, especially in libraries, because they can cause build failures if the layout
|
|
/// algorithm or dependencies change. Here in rustc we control the toolchain and layout algorithm,
|
|
/// so the former is not a problem. For the latter we have a lockfile as rustc is an application and
|
|
/// precompiled library.
|
|
///
|
|
/// Short version: Don't copy this macro into your own code. Use a `#[test]` instead.
|
|
///
|
|
/// </div>
|
|
#[macro_export]
|
|
#[cfg(not(feature = "rustc_randomized_layouts"))]
|
|
macro_rules! static_assert_size {
|
|
($ty:ty, $size:expr) => {
|
|
const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
|
|
};
|
|
}
|
|
|
|
#[macro_export]
|
|
#[cfg(feature = "rustc_randomized_layouts")]
|
|
macro_rules! static_assert_size {
|
|
($ty:ty, $size:expr) => {
|
|
// no effect other than using the statements.
|
|
// struct sizes are not deterministic under randomized layouts
|
|
const _: (usize, usize) = ($size, ::std::mem::size_of::<$ty>());
|
|
};
|
|
}
|