//@ check-pass //! An array must inherit the alignment of its inner type. #![crate_type = "lib"] #![feature(transmutability)] #![allow(dead_code, incomplete_features, non_camel_case_types)] mod assert { use std::mem::{Assume, BikeshedIntrinsicFrom}; pub fn is_maybe_transmutable() where Dst: BikeshedIntrinsicFrom {} } #[derive(Clone, Copy)] #[repr(u8)] enum Ox00 { V = 0x00 } #[derive(Clone, Copy)] #[repr(u8)] enum Ox01 { V = 0x01 } #[derive(Clone, Copy)] #[repr(u8)] enum OxFF { V = 0xFF } #[repr(C)] union Uninit { a: (), b: OxFF, } #[repr(C, align(2))] struct align_2(Ox00); fn len_0() { #[repr(C)] struct ImplicitlyPadded([align_2; 0], Ox01); #[repr(C)] struct ExplicitlyPadded(Ox01, Uninit); #[repr(C)] struct Struct(); assert::is_maybe_transmutable::(); assert::is_maybe_transmutable::(); } fn len_1() { #[repr(C)] struct ImplicitlyPadded([align_2; 1], Ox01); #[repr(C)] struct ExplicitlyPadded(Ox00, Uninit, Ox01, Uninit); #[repr(C)] struct Struct(); assert::is_maybe_transmutable::(); assert::is_maybe_transmutable::(); } fn len_2() { #[repr(C)] struct ImplicitlyPadded([align_2; 2], Ox01); #[repr(C)] struct ExplicitlyPadded(Ox00, Uninit, Ox00, Uninit, Ox01, Uninit); #[repr(C)] struct Struct(); assert::is_maybe_transmutable::(); assert::is_maybe_transmutable::(); }