From 218caa410aa38c29984be31a5229b9fa717560ee Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Wed, 17 Apr 2024 14:19:13 +0200 Subject: Merging upstream version 1.68.2+dfsg1. Signed-off-by: Daniel Baumann --- tests/ui/coherence/coherence-subtyping.rs | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) create mode 100644 tests/ui/coherence/coherence-subtyping.rs (limited to 'tests/ui/coherence/coherence-subtyping.rs') diff --git a/tests/ui/coherence/coherence-subtyping.rs b/tests/ui/coherence/coherence-subtyping.rs new file mode 100644 index 000000000..b3ed728a8 --- /dev/null +++ b/tests/ui/coherence/coherence-subtyping.rs @@ -0,0 +1,20 @@ +// Test that two distinct impls which match subtypes of one another +// yield coherence errors (or not) depending on the variance. +// +// Note: This scenario is currently accepted, but as part of the +// universe transition (#56105) may eventually become an error. + +// check-pass + +trait TheTrait { + fn foo(&self) {} +} + +impl TheTrait for for<'a, 'b> fn(&'a u8, &'b u8) -> &'a u8 {} + +impl TheTrait for for<'a> fn(&'a u8, &'a u8) -> &'a u8 { + //~^ WARNING conflicting implementation + //~^^ WARNING this was previously accepted by the compiler but is being phased out +} + +fn main() {} -- cgit v1.2.3