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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/dynamically-sized-types/dst-index.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/dynamically-sized-types/dst-index.rs')
-rw-r--r-- | src/test/ui/dynamically-sized-types/dst-index.rs | 34 |
1 files changed, 34 insertions, 0 deletions
diff --git a/src/test/ui/dynamically-sized-types/dst-index.rs b/src/test/ui/dynamically-sized-types/dst-index.rs new file mode 100644 index 000000000..8aa65bbfd --- /dev/null +++ b/src/test/ui/dynamically-sized-types/dst-index.rs @@ -0,0 +1,34 @@ +// run-pass +#![allow(unused_variables)] +// Test that overloaded index expressions with DST result types +// work and don't ICE. + +use std::ops::Index; +use std::fmt::Debug; + +struct S; + +impl Index<usize> for S { + type Output = str; + + fn index<'a>(&'a self, _: usize) -> &'a str { + "hello" + } +} + +struct T; + +impl Index<usize> for T { + type Output = dyn Debug + 'static; + + fn index<'a>(&'a self, idx: usize) -> &'a (dyn Debug + 'static) { + static X: usize = 42; + &X as &(dyn Debug + 'static) + } +} + +fn main() { + assert_eq!(&S[0], "hello"); + let _ = &T[0]; + // let x = &x as &Debug; +} |