diff options
Diffstat (limited to 'src/test/ui/consts/const-size_of-align_of.rs')
-rw-r--r-- | src/test/ui/consts/const-size_of-align_of.rs | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/src/test/ui/consts/const-size_of-align_of.rs b/src/test/ui/consts/const-size_of-align_of.rs deleted file mode 100644 index 0c63dc84a..000000000 --- a/src/test/ui/consts/const-size_of-align_of.rs +++ /dev/null @@ -1,51 +0,0 @@ -// run-pass -#![allow(dead_code)] - -use std::mem; - -// Get around the limitations of CTFE in today's Rust. -const fn choice_u64(c: bool, a: u64, b: u64) -> u64 { - (-(c as i64) as u64) & a | (-(!c as i64) as u64) & b -} - -const fn max_usize(a: usize, b: usize) -> usize { - choice_u64(a > b, a as u64, b as u64) as usize -} - -const fn align_to(size: usize, align: usize) -> usize { - (size + (align - 1)) & !(align - 1) -} - -const fn packed_union_size_of<A, B>() -> usize { - max_usize(mem::size_of::<A>(), mem::size_of::<B>()) -} - -const fn union_align_of<A, B>() -> usize { - max_usize(mem::align_of::<A>(), mem::align_of::<B>()) -} - -const fn union_size_of<A, B>() -> usize { - align_to(packed_union_size_of::<A, B>(), union_align_of::<A, B>()) -} - -macro_rules! fake_union { - ($name:ident { $a:ty, $b:ty }) => ( - struct $name { - _align: ([$a; 0], [$b; 0]), - _bytes: [u8; union_size_of::<$a, $b>()] - } - ) -} - -// Check that we can (poorly) emulate unions by -// calling size_of and align_of at compile-time. -fake_union!(U { u16, [u8; 3] }); - -fn test(u: U) { - assert_eq!(mem::size_of_val(&u._bytes), 4); -} - -fn main() { - assert_eq!(mem::size_of::<U>(), 4); - assert_eq!(mem::align_of::<U>(), 2); -} |