28 lines
746 B
Rust
28 lines
746 B
Rust
// revisions: current next
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//[next] compile-flags: -Ztrait-solver=next
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#![crate_type = "lib"]
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#![feature(transmutability)]
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#![allow(dead_code)]
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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 struct Context;
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pub fn is_transmutable<Src, Dst>()
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where
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Dst: BikeshedIntrinsicFrom<Src, Context, { Assume::SAFETY }>
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{}
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pub fn is_maybe_transmutable<Src, Dst>()
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where
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Dst: BikeshedIntrinsicFrom<Src, Context, { Assume::SAFETY.and(Assume::VALIDITY) }>
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{}
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}
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fn contrast_with_u8() {
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assert::is_transmutable::<u8, bool>(); //~ ERROR cannot be safely transmuted
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assert::is_maybe_transmutable::<u8, bool>();
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assert::is_transmutable::<bool, u8>();
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}
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