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Diffstat (limited to 'src/test/ui/coherence/coherence-inherited-subtyping.rs')
-rw-r--r-- | src/test/ui/coherence/coherence-inherited-subtyping.rs | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/src/test/ui/coherence/coherence-inherited-subtyping.rs b/src/test/ui/coherence/coherence-inherited-subtyping.rs new file mode 100644 index 000000000..8587eb779 --- /dev/null +++ b/src/test/ui/coherence/coherence-inherited-subtyping.rs @@ -0,0 +1,21 @@ +// 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. + +// revisions: old re + +struct Foo<T> { + t: T, +} + +impl Foo<for<'a, 'b> fn(&'a u8, &'b u8) -> &'a u8> { + fn method1(&self) {} //~ ERROR duplicate definitions with name `method1` +} + +impl Foo<for<'a> fn(&'a u8, &'a u8) -> &'a u8> { + fn method1(&self) {} +} + +fn main() {} |