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// Figuring out the size of a vector type that depends on traits doesn't ICE
#![allow(dead_code)]
#![feature(repr_simd, intrinsics, generic_const_exprs)]
#![allow(non_camel_case_types, incomplete_features)]
pub trait Simd {
type Lane: Clone + Copy;
const SIZE: usize;
}
pub struct i32x4;
impl Simd for i32x4 {
type Lane = i32;
const SIZE: usize = 4;
}
#[repr(simd)]
#[derive(Copy, Clone)]
pub struct T<S: Simd>([S::Lane; S::SIZE]);
//~^ ERROR unconstrained generic constant
//~| ERROR SIMD vector element type should be a primitive scalar
//~| ERROR unconstrained generic constant
extern "rust-intrinsic" {
fn simd_insert<T, E>(x: T, idx: u32, y: E) -> T;
fn simd_extract<T, E>(x: T, idx: u32) -> E;
}
pub fn main() {
let mut t = T::<i32x4>([0; 4]);
unsafe {
t = simd_insert(t, 3, 3);
assert_eq!(3, simd_extract(t, 3));
}
}
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