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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/regions/regions-no-variance-from-fn-generics.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/regions/regions-no-variance-from-fn-generics.rs')
-rw-r--r-- | tests/ui/regions/regions-no-variance-from-fn-generics.rs | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/tests/ui/regions/regions-no-variance-from-fn-generics.rs b/tests/ui/regions/regions-no-variance-from-fn-generics.rs new file mode 100644 index 000000000..76706a827 --- /dev/null +++ b/tests/ui/regions/regions-no-variance-from-fn-generics.rs @@ -0,0 +1,44 @@ +// run-pass +#![allow(unused_variables)] +// Issue #12856: a lifetime formal binding introduced by a generic fn +// should not upset the variance inference for actual occurrences of +// that lifetime in type expressions. + + +pub trait HasLife<'a> { + fn dummy(&'a self) { } // just to induce a variance on 'a +} + +trait UseLife01 { + fn refs<'a, H: HasLife<'a>>(&'a self) -> H; +} + +trait UseLife02 { + fn refs<'a, T: 'a, H: HasType<&'a T>>(&'a self) -> H; +} + + +pub trait HasType<T> +{ + fn dummy(&self, t: T) -> T { panic!() } +} + + +trait UseLife03<T> { + fn refs<'a, H: HasType<&'a T>>(&'a self) -> H where T: 'a; +} + + +// (The functions below were not actually a problem observed during +// fixing of #12856; they just seem like natural tests to put in to +// cover a couple more points in the testing space) + +pub fn top_refs_1<'a, H: HasLife<'a>>(_s: &'a ()) -> H { + unimplemented!() +} + +pub fn top_refs_2<'a, T: 'a, H: HasType<&'a T>>(_s: &'a ()) -> H { + unimplemented!() +} + +pub fn main() {} |