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
|
// check-pass
//! An array must have the correct length.
#![crate_type = "lib"]
#![feature(transmutability)]
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::{Assume, BikeshedIntrinsicFrom};
pub struct Context;
pub fn array_like<T, E, const N: usize>()
where
T: BikeshedIntrinsicFrom<[E; N], Context, { Assume::SAFETY }>,
[E; N]: BikeshedIntrinsicFrom<T, Context, { Assume::SAFETY }>
{}
}
fn len_0() {
type Array = [u8; 0];
#[repr(C)] struct Struct();
assert::array_like::<Struct, u8, 0>();
}
fn len_1() {
type Array = [u8; 1];
#[repr(C)] struct Struct(u8);
assert::array_like::<Struct, u8, 1>();
}
fn len_2() {
type Array = [u8; 2];
#[repr(C)] struct Struct(u8, u8);
assert::array_like::<Struct, u8, 2>();
}
fn len_3() {
type Array = [u8; 3];
#[repr(C)] struct Struct(u8, u8, u8);
assert::array_like::<Struct, u8, 3>();
}
|