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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/box/thin_align.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/box/thin_align.rs')
-rw-r--r-- | tests/ui/box/thin_align.rs | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/tests/ui/box/thin_align.rs b/tests/ui/box/thin_align.rs new file mode 100644 index 000000000..3c61d0090 --- /dev/null +++ b/tests/ui/box/thin_align.rs @@ -0,0 +1,26 @@ +#![feature(thin_box)] +// run-pass +use std::boxed::ThinBox; +use std::error::Error; +use std::ops::Deref; +use std::fmt; + +fn main() { + let expected = "Foo error!"; + let a: ThinBox<dyn Error> = ThinBox::new_unsize(Foo(expected)); + let a = a.deref(); + let msg = a.to_string(); + assert_eq!(expected, msg); +} + +#[derive(Debug)] +#[repr(align(1024))] +struct Foo(&'static str); + +impl fmt::Display for Foo { + fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result { + write!(f, "{}", self.0) + } +} + +impl Error for Foo {} |