diff --git a/src/test/ui/transmutability/abstraction/abstracted_assume.rs b/src/test/ui/transmutability/abstraction/abstracted_assume.rs new file mode 100644 index 00000000000..2abbbf3c158 --- /dev/null +++ b/src/test/ui/transmutability/abstraction/abstracted_assume.rs @@ -0,0 +1,73 @@ +// check-pass +//! The implementation should behave correctly when the `ASSUME` parameters are +//! provided indirectly through an abstraction. + +#![crate_type = "lib"] +#![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_ALIGNMENT: bool, + const ASSUME_LIFETIMES: bool, + const ASSUME_VALIDITY: bool, + const ASSUME_VISIBILITY: bool, + >() + where + Dst: BikeshedIntrinsicFrom< + Src, + Context, + ASSUME_ALIGNMENT, + ASSUME_LIFETIMES, + ASSUME_VALIDITY, + ASSUME_VISIBILITY, + >, + {} +} + +fn direct() { + struct Context; + #[repr(C)] struct Src; + #[repr(C)] struct Dst; + + assert::is_transmutable::(); +} + +fn via_const() { + struct Context; + #[repr(C)] struct Src; + #[repr(C)] struct Dst; + + const FALSE: bool = false; + + assert::is_transmutable::(); +} + +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, + {Ty::FALSE}, + {Ty::FALSE}, + {Ty::FALSE}, + {Ty::FALSE} + >(); +}