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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-04-17 12:02:58 +0000 |
commit | 698f8c2f01ea549d77d7dc3338a12e04c11057b9 (patch) | |
tree | 173a775858bd501c378080a10dca74132f05bc50 /src/test/ui/consts/const-trait-to-trait.rs | |
parent | Initial commit. (diff) | |
download | rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.tar.xz rustc-698f8c2f01ea549d77d7dc3338a12e04c11057b9.zip |
Adding upstream version 1.64.0+dfsg1.upstream/1.64.0+dfsg1
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'src/test/ui/consts/const-trait-to-trait.rs')
-rw-r--r-- | src/test/ui/consts/const-trait-to-trait.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/src/test/ui/consts/const-trait-to-trait.rs b/src/test/ui/consts/const-trait-to-trait.rs new file mode 100644 index 000000000..12a2999d7 --- /dev/null +++ b/src/test/ui/consts/const-trait-to-trait.rs @@ -0,0 +1,24 @@ +// run-pass +#![allow(dead_code)] +#![allow(unused_variables)] +// Issue #24644 - block causes a &Trait -> &Trait coercion: +trait Trait {} + +struct Bar; +impl Trait for Bar {} + +fn main() { + let x: &[&dyn Trait] = &[{ &Bar }]; +} + +// Issue #25748 - the cast causes an &Encoding -> &Encoding coercion: +pub struct UTF8Encoding; +pub const UTF_8: &'static UTF8Encoding = &UTF8Encoding; +pub trait Encoding {} +impl Encoding for UTF8Encoding {} +pub fn f() -> &'static dyn Encoding { UTF_8 as &'static dyn Encoding } + +// Root of the problem: &Trait -> &Trait coercions: +const FOO: &'static dyn Trait = &Bar; +const BAR: &'static dyn Trait = FOO; +fn foo() { let _x = BAR; } |