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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:19:13 +0000 |
commit | 218caa410aa38c29984be31a5229b9fa717560ee (patch) | |
tree | c54bd55eeb6e4c508940a30e94c0032fbd45d677 /tests/ui/cast/fat-ptr-cast-rpass.rs | |
parent | Releasing progress-linux version 1.67.1+dfsg1-1~progress7.99u1. (diff) | |
download | rustc-218caa410aa38c29984be31a5229b9fa717560ee.tar.xz rustc-218caa410aa38c29984be31a5229b9fa717560ee.zip |
Merging upstream version 1.68.2+dfsg1.
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'tests/ui/cast/fat-ptr-cast-rpass.rs')
-rw-r--r-- | tests/ui/cast/fat-ptr-cast-rpass.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/tests/ui/cast/fat-ptr-cast-rpass.rs b/tests/ui/cast/fat-ptr-cast-rpass.rs new file mode 100644 index 000000000..f5747eb8b --- /dev/null +++ b/tests/ui/cast/fat-ptr-cast-rpass.rs @@ -0,0 +1,34 @@ +// run-pass + +#![feature(ptr_metadata)] + +trait Foo { + fn foo(&self) {} +} + +struct Bar; + +impl Foo for Bar {} + +fn main() { + // Test we can turn a fat pointer to array back into a thin pointer. + let a: *const [i32] = &[1, 2, 3]; + let b = a as *const [i32; 2]; + unsafe { + assert_eq!(*b, [1, 2]); + } + + // Test conversion to an address (usize). + let a: *const [i32; 3] = &[1, 2, 3]; + let b: *const [i32] = a; + assert_eq!(a as usize, b as *const () as usize); + + // And conversion to a void pointer/address for trait objects too. + let a: *mut dyn Foo = &mut Bar; + let b = a as *mut () as usize; + let c = a as *const () as usize; + let d = a.to_raw_parts().0 as usize; + + assert_eq!(b, d); + assert_eq!(c, d); +} |