26 lines
641 B
Rust
26 lines
641 B
Rust
|
//@ known-bug: #118952
|
||
|
|
#![allow(non_camel_case_types)]
|
||
|
|
#![feature(generic_const_exprs)]
|
||
|
|
#![feature(specialization)]
|
||
|
|
|
||
|
|
const DEFAULT_SMALL_VEC_INLINE_CAPACITY: usize = std::mem::size_of::<usize>() * 8;
|
||
|
|
|
||
|
|
pub const fn tiny_vec_cap<T>() -> usize {
|
||
|
|
return (DEFAULT_SMALL_VEC_INLINE_CAPACITY - 1) / std::mem::size_of::<T>()
|
||
|
|
}
|
||
|
|
|
||
|
|
pub struct TinyVec<T, const N: usize = {tiny_vec_cap::<T>()}>
|
||
|
|
where [
|
||
|
|
();
|
||
|
|
(N * std::mem::size_of::<T>())
|
||
|
|
- std::mem::size_of::<std::ptr::NonNull<T>>()
|
||
|
|
- std::mem::size_of::<isize>()
|
||
|
|
]: ,
|
||
|
|
{
|
||
|
|
data: isize //TinyVecData<T, N>,
|
||
|
|
}
|
||
|
|
|
||
|
|
pub fn main() {
|
||
|
|
let t = TinyVec::<u8>::new();
|
||
|
|
}
|