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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/nll/relate_tys/hr-fn-aaa-as-aba.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/nll/relate_tys/hr-fn-aaa-as-aba.rs')
-rw-r--r-- | tests/ui/nll/relate_tys/hr-fn-aaa-as-aba.rs | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/tests/ui/nll/relate_tys/hr-fn-aaa-as-aba.rs b/tests/ui/nll/relate_tys/hr-fn-aaa-as-aba.rs new file mode 100644 index 000000000..7891bab09 --- /dev/null +++ b/tests/ui/nll/relate_tys/hr-fn-aaa-as-aba.rs @@ -0,0 +1,24 @@ +// Test that the NLL `relate_tys` code correctly deduces that a +// function returning either argument CANNOT be upcast to one +// that returns always its first argument. +// +// compile-flags:-Zno-leak-check + +fn make_it() -> for<'a> fn(&'a u32, &'a u32) -> &'a u32 { + panic!() +} + +fn foo() { + let a: for<'a, 'b> fn(&'a u32, &'b u32) -> &'a u32 = make_it(); + //~^ ERROR mismatched types [E0308] + drop(a); +} + +fn bar() { + // The code path for patterns is mildly different, so go ahead and + // test that too: + let _: for<'a, 'b> fn(&'a u32, &'b u32) -> &'a u32 = make_it(); + //~^ ERROR mismatched types [E0308] +} + +fn main() {} |