From cf2dff2b1e3fa55fa5415d524200070d0d7aacfe Mon Sep 17 00:00:00 2001 From: Albert Larsan <74931857+albertlarsan68@users.noreply.github.com> Date: Thu, 5 Jan 2023 09:13:28 +0100 Subject: Move /src/test to /tests --- tests/ui/packed/packed-struct-generic-layout.rs | 32 +++++++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 tests/ui/packed/packed-struct-generic-layout.rs (limited to 'tests/ui/packed/packed-struct-generic-layout.rs') diff --git a/tests/ui/packed/packed-struct-generic-layout.rs b/tests/ui/packed/packed-struct-generic-layout.rs new file mode 100644 index 00000000000..e064eede4ce --- /dev/null +++ b/tests/ui/packed/packed-struct-generic-layout.rs @@ -0,0 +1,32 @@ +// run-pass +#![allow(dead_code)] +#![allow(overflowing_literals)] + + +use std::mem; + +#[repr(packed)] +struct S { + a: T, + b: u8, + c: S +} + +pub fn main() { + unsafe { + let s = S { a: 0xff_ff_ff_ffu32, b: 1, c: 0xaa_aa_aa_aa as i32 }; + let transd : [u8; 9] = mem::transmute(s); + // Don't worry about endianness, the numbers are palindromic. + assert_eq!(transd, + [0xff, 0xff, 0xff, 0xff, + 1, + 0xaa, 0xaa, 0xaa, 0xaa]); + + + let s = S { a: 1u8, b: 2u8, c: 0b10000001_10000001 as i16}; + let transd : [u8; 4] = mem::transmute(s); + // Again, no endianness problems. + assert_eq!(transd, + [1, 2, 0b10000001, 0b10000001]); + } +} -- cgit 1.4.1-3-g733a5