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|
// check-pass
//! The implementation should behave correctly when the `ASSUME` parameters are
//! provided indirectly through an abstraction.
#![crate_type = "lib"]
#![feature(adt_const_params)]
#![feature(transmutability)]
#![allow(dead_code, incomplete_features, non_camel_case_types)]
mod assert {
use std::mem::BikeshedIntrinsicFrom;
pub fn is_transmutable<
Src,
Dst,
Context,
const ASSUME: std::mem::Assume,
>()
where
Dst: BikeshedIntrinsicFrom<
Src,
Context,
ASSUME,
>,
{}
}
fn direct() {
struct Context;
#[repr(C)] struct Src;
#[repr(C)] struct Dst;
assert::is_transmutable::<Src, Dst, Context, { std::mem::Assume::NOTHING }>();
}
fn via_const() {
struct Context;
#[repr(C)] struct Src;
#[repr(C)] struct Dst;
const FALSE: bool = false;
assert::is_transmutable::<Src, Dst, Context, { std::mem::Assume::NOTHING }>();
}
fn via_associated_const() {
struct Context;
#[repr(C)] struct Src;
#[repr(C)] struct Dst;
trait Trait {
const FALSE: bool = true;
}
struct Ty;
impl Trait for Ty {}
assert::is_transmutable::<
Src,
Dst,
Context,
{
std::mem::Assume {
alignment: {Ty::FALSE},
lifetimes: {Ty::FALSE},
safety: {Ty::FALSE},
validity: {Ty::FALSE},
}
}
>();
}
|
