1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
|
#![deny(rustc::untranslatable_diagnostic)]
#![deny(rustc::diagnostic_outside_of_impl)]
#![cfg_attr(
feature = "nightly",
feature(
allow_internal_unstable,
extend_one,
min_specialization,
new_uninit,
step_trait,
stmt_expr_attributes,
test
)
)]
#![cfg_attr(feature = "nightly", allow(internal_features))]
pub mod bit_set;
#[cfg(feature = "nightly")]
pub mod interval;
mod idx;
mod slice;
mod vec;
pub use {idx::Idx, slice::IndexSlice, vec::IndexVec};
pub use rustc_index_macros::newtype_index;
/// 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]
macro_rules! static_assert_size {
($ty:ty, $size:expr) => {
const _: [(); $size] = [(); ::std::mem::size_of::<$ty>()];
};
}
|
