mirror of https://github.com/rust-lang/rust
38 lines
1.0 KiB
Rust
38 lines
1.0 KiB
Rust
//@ check-fail
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#![feature(generic_const_exprs, transmutability)]
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#![allow(incomplete_features)]
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mod assert {
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use std::mem::{Assume, BikeshedIntrinsicFrom};
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pub fn is_transmutable<
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Src,
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Dst,
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const ASSUME_ALIGNMENT: bool,
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const ASSUME_LIFETIMES: bool,
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const ASSUME_SAFETY: bool,
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const ASSUME_VALIDITY: bool,
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>()
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where
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Dst: BikeshedIntrinsicFrom<
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Src,
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{ from_options(ASSUME_ALIGNMENT, ASSUME_LIFETIMES, ASSUME_SAFETY, ASSUME_VALIDITY) }
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>,
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{}
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// This should not cause an ICE
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const fn from_options(
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, //~ ERROR expected parameter name, found `,`
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, //~ ERROR expected parameter name, found `,`
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, //~ ERROR expected parameter name, found `,`
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, //~ ERROR expected parameter name, found `,`
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) -> Assume {} //~ ERROR mismatched types
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}
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fn main() {
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#[repr(C)] struct Src;
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#[repr(C)] struct Dst;
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assert::is_transmutable::<Src, Dst, false, false, { true }, false>();
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}
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