33 lines
795 B
Rust
33 lines
795 B
Rust
// revisions: current next
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//[next] compile-flags: -Znext-solver
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//! The unit type, `()`, should be one byte.
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#![crate_type = "lib"]
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#![feature(transmutability)]
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#![allow(dead_code)]
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mod assert {
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use std::mem::{Assume, BikeshedIntrinsicFrom};
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pub fn is_transmutable<Src, Dst, Context>()
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where
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Dst: BikeshedIntrinsicFrom<Src, Context, {
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Assume::ALIGNMENT
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.and(Assume::LIFETIMES)
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.and(Assume::SAFETY)
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.and(Assume::VALIDITY)
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}>
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{}
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}
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#[repr(C)]
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struct Zst;
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fn should_have_correct_size() {
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struct Context;
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assert::is_transmutable::<(), Zst, Context>();
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assert::is_transmutable::<Zst, (), Context>();
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assert::is_transmutable::<(), u8, Context>(); //~ ERROR cannot be safely transmuted
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}
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