diff options
Diffstat (limited to 'src/test/ui/union/union-transmute.rs')
-rw-r--r-- | src/test/ui/union/union-transmute.rs | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/src/test/ui/union/union-transmute.rs b/src/test/ui/union/union-transmute.rs new file mode 100644 index 000000000..1a3b32d55 --- /dev/null +++ b/src/test/ui/union/union-transmute.rs @@ -0,0 +1,27 @@ +// run-pass +// revisions: mirunsafeck thirunsafeck +// [thirunsafeck]compile-flags: -Z thir-unsafeck + +union U { + a: (u8, u8), + b: u16, +} + +union W { + a: u32, + b: f32, +} + +fn main() { + unsafe { + let mut u = U { a: (1, 1) }; + assert_eq!(u.b, (1 << 8) + 1); + u.b = (2 << 8) + 2; + assert_eq!(u.a, (2, 2)); + + let mut w = W { a: 0b0_11111111_00000000000000000000000 }; + assert_eq!(w.b, f32::INFINITY); + w.b = f32::NEG_INFINITY; + assert_eq!(w.a, 0b1_11111111_00000000000000000000000); + } +} |